METHOD FOR GROWING CAPABLE HETEROTROPHIC GROWTH MICROALGAS, METHOD FOR MANUFACTURING A MATERIAL, AND

专利摘要:
method for cultivating microalgae capable of heterotrophic growth, method for making a material, and bioreactor system are provided herein and methods for cultivating microalgae. The bioreactor and methods include features and modifications to improve the efficiency of heterotrophic growth by providing a light signal.
公开号:BR112012005844B1
申请号:R112012005844-4
申请日:2010-09-17
公开日:2019-11-26
发明作者:Chung-Soon Im；Jane Kim
申请人:Phycoil Biotechnology International, Inc.；
IPC主号:

专利说明:

METHOD FOR GROWING MICRO-ALGAE CAPABLE OF HETEROTROPHIC GROWTH, METHOD FOR MANUFACTURING A MATERIAL, AND BIORREACTOR SYSTEM
CROSS REFERENCE TO RELATED REQUESTS
This application claims the benefit of Provisional Application No. US 61 / 243,593, filed on September 18, 2009 and Provisional Application No. US 61 / 359,726, filed on June 29, 2010, the entire disclosures of which are incorporated by reference into their totalities for all purposes.
FIELD
The invention relates to methods, means and systems for fermentation of microorganisms, for example, microalgae. The invention can be used in the pharmaceutical, cosmetic and food industries, as well as to obtain oil and biofuel from microalgae.
HISTORIC
Recently, attention has been directed to the application of microalgae in the production of a variety of materials including lipids, hydrocarbons, oil, polysaccharides, pigments and biofuels.
One of the conventional methods for growing microalgae is to grow them heterotrophically in a closed system, without light. Techniques were developed for the large-scale production of aquatic microalgae under heterotrophic growth conditions, using organic carbon instead of light as an energy source. For example, U.S. Pat. We. US 3,142,135 and 3,882,635 describe processes for the heterotrophic production of proteins and pigments from algae such as Chlorella, Spongiococcum, and Prototheca. In addition, heterotrophic algal cultures can reach densities much higher than photoautotrophic cultures.
However, the above patent application cannot be
Petition 870180160141, of 12/07/2018, p. 8/16
2/82 applied to all microalgae because only a limited number of microalgae strains can grow under heterotrophic conditions. Attempts to grow microalgae under heterotrophic conditions often involve screening 5 strains that can grow under heterotrophic conditions, or genetic modification of organisms to allow growth under such conditions.
Microalgae that contain both a suitable transport system for sugar and that can grow naturally under heterotrophic conditions often show slow growth rates or low production of raw materials of commercial interest, as they have evolved many years to use sunlight as an environmental signal to control aspects of metabolism, as well as the energy generated through photosynthesis.
Most photosynthetic organisms, including microalgae, use light as an environmental signal to optimize themselves for survival and growth. The light signals are perceived by different photoreceptors 20 including photoreceptors of red / distant red (phytochromes) and photoreceptors of blue light (cryptochromes and NPHs). Light serves as an environmental signal that regulates physiological and developmental processes and provides the energy that fuels the reduction of inorganic carbon. However, under 25 certain conditions, light also has the potential to be toxic. Photoinhibition occurs when the flow of photons absorbed by the chloroplasts is very high (in high light conditions) or when the influx of light energy exceeds the consumption capacity (in mixotrophic conditions where a cell uses reduced carbon as an energy source). Under mixotrophic conditions, photosynthetic organisms show photoinhibition at a much lower light intensity than under autotrophic conditions, since the absorbed electrons
3/82 cannot be used efficiently through the photosynthetic apparatus due to a feedback mechanism in the Calvin cycle.
The absorbed light energy can result in the accumulation of excited chlorophyll molecules inside the pigment mattress and damage to the photosystem. Excited chlorophyll molecules that accumulate in the pigment mattress as a result of excessive excitation can also stimulate the production of reactive oxygen species such as superoxides, hydroxyl radicals and singlet oxygen.
SUMMARY
A method for growing microalgae capable of heterotrophic growth is disclosed in this document, including: incubating microalgae in a heterotrophic growth condition for a period of time sufficient to allow the microalgae to grow, where the heterotrophic growth condition includes media that include a carbon source, and where the condition of heterotrophic growth additionally includes a low light irradiance.
In some embodiments, the microalgae is a strain of Botryococcus, the carbon source is glucose, and the low light irradiance is between 1-10 μπτοί photons m s.
In some embodiments, the microalgae is a strain of Botryococcus sudeticus. In some embodiments, the microalgae is a strain of Botryococcus. In some embodiments, the microalgae is a UTEX 2629 strain. In some embodiments, the microalgae is a strain of Botryococcus braunii. In some embodiments, the microalgae is a UTEX 2441 strain. In some embodiments, the microalgae is a strain of Neochloris oleabundans. In some embodiments, the microalgae is a Neochloris strain. In some embodiments, the microalgae is a UTEX 1185 strain. In some embodiments, the microalgae is a strain of Chlamydomonas reinhardtii. In some embodiments, microalgae is a strain
4/82 of Chlamydomonas. In some embodiments, microalgae is a
UTEX strain 2243. In some achievements, at microalgae understand a photoreceptor.In some achievements, The source in carbon is glucose. In some achievements, The source in carbon is selected of the group consisting in a fountain of carbon
fixed, glucose, fructose, sucrose, galactose, xylose, mannose, rhamnose, N-acetylglucosamine, glycerol, floridoside, glycuronic acid, corn starch, depolymerized cellulosic material, sugar cane, sugar beet, lactose, whey and molasses.
In some embodiments, the light is produced by a natural light source. In some embodiments, light is natural sunlight. In some embodiments, light comprises the entire light spectrum or a specific wavelength of light. In some embodiments, the light is produced by an artificial light source. In some embodiments, light is artificial light. In some embodiments, the intensity of the low light irradiance is between 0.01-1 pmol photons ms. In some embodiments, the intensity of the low light irradiance is between 1-10 pmol photons m ' ² s ¹ - !. In some embodiments, the intensity of the low light irradiance is between 10-100 pmol photons m ² s' ¹ . In some embodiments, the intensity of the low light irradiance is between 100-300 pmol photons m ' ² s' ¹ . In some embodiments, the intensity of the low light irradiance is between 100-300 pmol photons ms - ¹ . In some embodiments, the intensity of the low light irradiance is 3-4 pmol / m ² s' ¹ photon, 2-3 pmol / m ² s' ¹ photon, 1-2 pmol / m ² s' ¹ photon or 3- 5 pmol / m ² s ¹ photon.
In some embodiments, the method additionally includes producing a material from microalgae. In some embodiments, the material is a polysaccharide, a pigment, a lipid or a hydrocarbon. In some
5/82 realizations, the material is a hydrocarbon.
In some embodiments, the method additionally includes recovering the material. In some embodiments, the method additionally includes extracting the material.
In some embodiments, the method additionally includes processing the material. In some embodiments, material processing produces a processed material. In some embodiments, the processed material is selected from the group consisting of a fuel, biodiesel, jet fuel, a cosmetic, a pharmaceutical agent, a surfactant and a renewable diesel.
In some embodiments, the growth rate of microalgae in the above methods is greater than that of a second microalgae incubated in a second condition of heterotrophic growth for a period of time sufficient to allow the microalgae to grow, in which the second condition of heterotrophic growth includes growth media that comprise a carbon source, and wherein the second heterotrophic growth condition does not include low light irradiance.
Also described in this document, it is a method of growing microalgae, including placing a • plurality of microalgae cells in the presence of a carbon source and low light irradiance.
Also described in this document is a method of manufacturing a material, including: providing microalgae capable of producing the material; cultivating microalgae in media, where the media includes a carbon source; apply a low light irradiance to microalgae; and allowing the 30 microalgae to accumulate at least 10% of their dry cell weight as the material. In some embodiments, the method additionally includes recovering the material.
Also described in this document is a system of
6/82 bioreactor, including: a bioreactor; culture media including a carbon source, where the culture media are located within the bioreactor; microalgae adapted for heterotrophic growth, in which the microalgae are located in the culture media; and a light source, in which the light source produces a low light irradiance, and in which the light source is operatively coupled to the bioreactor.
»> - In some embodiments, the light from the light source includes the entire light spectrum or a specific 10 wavelength of light. In some embodiments, the light from the light source includes natural sunlight collected by a solar energy collector operatively coupled to the bioreactor, and in which light is transmitted into the interior of the bioreactor via an optical fiber operatively coupled to the solar collector and 15 to the bioreactor. In some embodiments, the light from the light source includes artificial light, in which the artificial light is produced by a light-emitting diode (LED) or fluorescent light. In some embodiments, the system additionally includes a power supply sufficient to power the LED or fluorescent light 20, in which the power supply is operably coupled to the bioreactor; and a light controller operatively coupled to the power supply, wherein the. Light controller is adapted to control the intensity and wavelength of the light emitted by the LED or fluorescent light. In some embodiments, the optical fiber is mounted in a transparent and protective structure for light. In some embodiments, the LED is mounted on a transparent and protective structure for light.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
These and other characteristics, aspects and advantages of the present invention will become better understood with respect to the following description and accompanying drawings, where:
7/82
Figure 1 is an embodiment of a bioreactor.
Figure 2 illustrates the isoprenoid / carotenoid pathway.
At Figures 3A-C show growth in UTEX 1185 in conditions of light white, blue and red. 0 axis X and shown in days. Gli means glucose. At Figures 4A-C show growth in UTEX 2629 in conditions of light white, blue and red. 0 axis X and shown in days. Gli means glucose. At Figures 5A-C show growth in UTEX 2441 in conditions of light white, blue and red. Gli means
glucose.
Figure 6 shows the production of lipids by UTEX 2441 under red light conditions. LG means light + glucose; EG means dark + glucose.
Figure 7 shows the growth of UTEX 2243 in white light conditions.
DETAILED DESCRIPTION
Terms used in the claims and specification are defined as set out below unless otherwise specified.
Axenic (o) means a culture of an organism that is free from contamination by other living organisms.
Biodiesel is a biologically produced fatty acid alkyl ester suitable for use as fuel in a diesel engine.
The term biomass refers to the material produced by the growth and / or propagation of cells. Biomass can contain cells and / or intracellular content, as well as extracellular material. Extracellular material includes, among others, compounds secreted by a cell.
Bioreactor means a compartment or partial compartment in which cells are grown,
8/82 optionally in suspension. Figure 1 is an example of a bioreactor. Photobioreactor refers to a container, at least part of which is at least partially transparent or partially open, thus allowing light to pass through, in which one or more microalgae cells are grown. Photobioreactors can be closed, as in the case of a polyethylene bag or Erlenmeyer flask, or they can be opened to the environment, as in the case of an outdoor tank.
As used in this document, a catalyst refers to an agent, such as a macromolecular molecule or complex, capable of facilitating or promoting a chemical reaction from a reagent to a product without becoming a part of the product. A catalyst thus increases the rate of a reaction, after which the catalyst can act on another reagent to form the product. A catalyst generally reduces the overall activation energy required for the reaction, so that it proceeds more quickly or at a lower temperature. Thus, the equilibrium of the reaction can be reached more quickly. Examples of catalysts include enzymes, which are biological catalysts, heat, which is a non-biological catalyst, and metal catalysts used in fossil oil refining processes.
Cellulosic material means the products of cellulose digestion, including glucose and xylose and optionally additional compounds such as disaccharides, oligosaccharides, lignin, furfural and other compounds. Non-limiting examples of sources of cellulosic material include sugarcane bagasse, sugar beet pulp, corn forage, wood chips, sawdust and switchgrass.
The term co-culture and its variants, such as cocultivation, refer to the presence of two or more types of cells in the same bioreactor. The two or more cell types
9/82 can both be microorganisms, like microalgae, or they can be a microalgae cell grown with a different cell type. Cultivation conditions can be those that promote the growth and / or propagation of two or more 5 cell types or those that facilitate the growth and / or proliferation of one, or a subset, of two or more cells, while maintaining the cell growth for the rest.
The term cofactor is used in this document to refer to any molecule, except for the substrate, that is necessary for an enzyme to carry out its activity!
enzymatic.
The term cultivated and its variants refer to the intentional promotion of growth (increases in cell size, cell contents and / or cell activity) and / or propagation (increases in cell numbers through mitosis) of one or more cells by use of predicted cultivation conditions. The combination of both growth and propagation can be called proliferation. One or more cells can be those of a microorganism, such as microalgae. Examples of predicted conditions include the use of a defined medium (with known characteristics, such as pH, * ionic strength and carbon source), specified temperature, oxygen tension, carbon dioxide levels and growth in a bioreactor. The term does not refer to the growth or propagation of microorganisms in nature or otherwise without direct human intervention, such as the natural growth of an organism that, in the end, becomes fossilized to produce geological crude oil.
As used in this document, the term cytolysis refers to the lysis of cells in a hypotonic environment. Cytolysis is caused by excessive osmosis, or movement of water, into a cell (hyperhydration). The cell
10/82 cannot withstand the osmotic pressure of the water inside, and then it explodes.
How used in this document, the vector terms ofexpression or construction in expression refer to a5 construction in acid nucleic, generated so recombinant or THE- synthetic, with one series in elements in nucleic acid
that allow the transcription of a particular nucleic acid in a host cell. The expression vector can be part of a plasmid, virus, or fragment of nucleic acid. Typically, the expression vector includes a nucleic acid to be transcribed operably linked to a promoter.
Exogenous gene refers to a nucleic acid transformed into a cell. A transformed cell can be referred to as a recombinant cell, in which additional exogenous gene (s) can / can be introduced. The exogenous gene can be of a different species (and, therefore, heterologous), or of the same species (and, therefore, homologous) in relation to the cell to be transformed. In the case of a homologous gene 20, it occupies a different location in the cell's genome in relation to the endogenous copy of the gene. The exogenous gene can be present in more than one copy in the cell. The exogenous gene can be maintained in a cell as an insert in the genome or as an episomal molecule.
Exogenously provided describes a molecule provided to the culture media of a cell culture.
Fixed carbon source means carbon molecule (s) that contain / contain, for example, organic carbon, which is present at ambient temperature and pressure in solid or liquid form.
Homogenate means biomass that has been physically disrupted.
As used in this document, hydrocarbon
11/82 refers to: (a) a molecule that contains only hydrogen and carbon atoms, in which the carbon atoms are covalently linked to form a linear, branched, cyclic, or partially cyclic main structure to which 5 are attached hydrogen atoms; or (b) a molecule that contains only mainly hydrogen and carbon atoms and that can be converted to contain only hydrogen and carbon atoms by one to four chemical reactions. Non-limiting examples of the latter include hydrocarbons 10 containing an oxygen atom between a carbon and a hydrogen atom to form an alcohol molecule, as well as aldehydes that contain a single oxygen atom. Methods for reducing alcohols to hydrocarbons that contain only carbon and hydrogen atoms are well known.
Another example of a hydrocarbon is an ester, in which an organic group replaces a hydrogen atom (or more than one) in an oxygen acid. The molecular structure of hydrocarbon compounds ranges from the simplest, in the form of methane (CH ₄ ), which is a constituent of natural gas, to very heavy and very complex, like some molecules such as asphaltenes found in crude oil, petroleum and bitumen . Hydrocarbons can be in gaseous, liquid, or solid form, or any combination of these forms and can have one or more double or triple bonds between adjacent carbon atoms in the main structure. Consequently, the term includes paraffin, lipids, straight, branched, cyclic or partially cyclic alkanes and alkanes. Examples include propane, butane, pentane, hexane, octane, triolein and squalene.
The term hydrogen: carbon ratio refers to the ratio of hydrogen atoms to carbon atoms in a molecule on an atom to atom basis. The proportion can be used to refer to the number of carbon atoms
12/82 and hydrogen in a hydrocarbon molecule. For example, the hydrocarbon with the highest proportion is methane CH ₄ (4: 1).
Hydrophobic fraction refers to the portion, or fraction, of a material that is more soluble in a hydrophobic phase compared to an aqueous phase. A hydrophobic fraction is considerably insoluble in water and is generally non-polar.
As used in this document, the expression increases lipid yield refers to an increase in the productivity of a microbial culture, for example, by increasing the dry weight of cells per liter of culture, increasing the percentage of cells that make up lipids, or increasing the total amount of lipids per liter of culture volume per unit of time.
An inducible promoter is one that mediates the transcription of an operably linked gene in response to a particular stimulus.
As used herein, the term in operational linkage refers to a functional link between two sequences, such as a control sequence (typically a promoter) and the linked sequence. A promoter is operationally linked to an exogenous gene if it can mediate the transcription of the gene.
The term in situ means in place or in its original position. For example, a culture may contain a first microalgae that secretes a catalyst and a second microorganism that secretes a substrate, where the first and second cell types produce the components necessary for a particular chemical reaction to occur in situ in the coculture without require additional separation or processing of the materials.
A limiting concentration of a nutrient is a concentration in a culture that limits the spread of a cultured organism. A non-limiting concentration of one
13/82 nutrient is a concentration that supports maximum propagation during a given growing period. Thus, the number of cells produced during a given cultivation period is lower in the presence of a limiting concentration of a nutrient than when the nutrient is not limiting. A nutrient is said to be in excess in a crop, when the nutrient is present in a higher concentration than that which supports maximal propagation.
As used herein, a lipase is a water-soluble enzyme that catalyzes the hydrolysis of ester bonds on water-insoluble lipid substrates. Lipases catalyze the hydrolysis of lipids into glycerols and fatty acids.
Lipids are a class of hydrocarbons that are soluble in non-polar solvents (such as ether and chloroform) and are relatively or completely insoluble in water. Lipid molecules have these properties because they consist mainly of long tails of hydrocarbons 20 which are hydrophobic in nature. Examples of lipids include fatty acids (saturated and unsaturated); glycerides or glycerolipids (such as monoglycerides, diglycerides, triglycerides or neutral fats, and phosphoglycerides or glycerophospholipids); non-glycerides (sphingolipids, sterol lipids including cholesterol and steroid hormones, prenol lipids including terpenoids, fatty alcohols, waxes and polyketides); and complex lipid derivatives (sugar-linked lipids, or protein-linked glycolipids and lipids). Fats are a subset of 30 lipids called triacylglycerides.
The term low light irradiance refers to the light irradiance that can be applied to a microorganism, while preventing significant photoinhibition in
14/82 heterotrophic conditions and the light irradiance required to initiate a light-activated metabolism in the microorganism. Light-activated metabolisms include, among others, a life cycle, a circadian rhythm, cell division, a biosynthetic pathway and a transport system.
As used in this document, the term lysate refers to a solution that contains the content of lysed cells.
As used in this document, the term lysis refers to the rupture of the plasma membrane and, optionally, the cell wall of a biological organism sufficient to release at least some intracellular content, often by mechanical, viral or osmotic mechanisms that compromise its integrity.
As used herein, the term lysando refers to the disruption of the cell membrane and, optionally, the cell wall of a biological organism or cell sufficient to release at least some intracellular content.
Microalgae means eukaryotic microbial organisms that contain a chloroplast and, optionally, that are capable of photosynthesis, or a prokaryotic microbial organism capable of photosynthesis. Microalgae include mandatory photoautotrophic organisms, which cannot metabolize a fixed carbon source as energy, as well as heterotrophic organisms, which can only live outside a fixed carbon source. Microalgae can refer to single-celled organisms that separate from sister cells shortly after cell division, such as Chlamydomonas, and may also refer to microbes such as Volvox, which is a simple multicellular photosynthetic microbe of two distinct types cell phones. Microalgae can also refer to cells, such as Chlorella and Dunaliella. Microalgae also includes other
15/82 microbial photosynthetic organisms that exhibit cell-cell adhesion, such as Agmenellum, Anabaena, and Pyrobotrys. Microalgae also include mandatory heterotrophic microorganisms that have lost the ability to perform photosynthesis, such as certain species of dinoflagellate algae. Other examples of microalgae are described below.
The terms microorganism and microbe are used interchangeably in this document to refer to microscopic single-celled organisms, for example, microalgae.
As used in this document, the term osmotic shock refers to the rupture of cells in a solution after a sudden reduction in osmotic pressure. Osmotic shock is sometimes induced to release cellular components from these cells into a solution.
Polysaccharides (also called glycans) are carbohydrates made up of monosaccharides joined by glycosidic bonds. Cellulose is an example of a polysaccharide that forms certain plant cell walls. Cellulose can be depolymerized by enzymes to produce monosaccharides such as xylose and glucose, as well as larger disaccharides and oligosaccharides.
Door, in the context of a bioreactor, refers to an opening in the bioreactor that allows the inflow or outflow of materials, such as gases, liquids and cells. Doors are usually connected to the piping that runs from the bioreactor.
A promoter is defined as an array of nucleic acid control sequences that direct the direct transcription of a nucleic acid. As used herein, a promoter includes necessary nucleic acid sequences close to the transcription start site, such as, in the case of a polymerase II-like promoter, an element
16/82
TATA. A promoter also optionally includes distal repressor or enhancer elements, which can be located as far as several thousand base pairs from the transcription start site.
As used herein, the term recombinant when used with reference, for example, to a cell, or nucleic acid, protein, or vector, indicates that the cell, nucleic acid, protein or vector, has been modified by the introduction of a nucleic acid or exogenous protein or by altering a nucleic acid or native protein, or that the cell is derived from a cell so modified. Thus, for example, recombinant cells express genes that are not found within the native (non-recombinant) form of the cell or express native genes that are otherwise abnormally expressed, underexpressed or not expressed at all. By the term recombinant nucleic acid, in this document, is meant nucleic acid, originally formed in vitro, in general, by manipulation of nucleic acid, for example, using polymerases and endonucleases, in a form not normally found in nature. In this way, the operational connection of different sequences is achieved. Thus, an isolated nucleic acid, in a linear form, or an expression vector formed in vitro by binding DNA molecules that are not normally associated, are both considered recombinant for the purposes of this invention. It is understood that once a recombinant nucleic acid is made and reintroduced into a host cell or organism, it will replicate non-recombinantly, that is, using the host cell's in vivo cellular machinery instead of in vitro manipulations; however, these nucleic acids, once produced recombinantly, although subsequently replicated non-recombinantly, are additionally considered recombinants for the purposes of
17/82 invention. Likewise, a recombinant protein is a protein made using recombinant techniques, that is, through the expression of a recombinant nucleic acid, as described above.
As used in this document, the term renewable diesel refers to alkanes (such as C: 10: 0, C12: 0, C: 14: 0, C16: 0 and C18: 0) produced through hydrogenation and deoxygenation of lipids.
As used in this document, the term sonication refers to a process of disruption of biological materials, such as a cell, through the use of sound wave energy.
Furfural species refer to 2furancarboxaldehyde or its derivative that retains the same basic structural characteristics.
As used in this document, fodder refers to the dry leaves and stems of a crop that remains after a grain has been harvested.
Wastewater is aqueous waste that typically contains washing water, laundry waste, feces, urine and other liquid or semi-liquid waste. It includes some forms of municipal waste, as well as secondary treated sewage.
It should be noted that, as used in the specification and the appended claims, the singular forms one and the include plural references unless the context clearly determines otherwise.
Microorganisms
Any species of organism that produces a suitable lipid or hydrocarbon can be used, although microorganisms that naturally produce high levels of a suitable lipid or hydrocarbon are preferred. The production of hydrocarbons by microorganisms is reviewed by Metzger et
18/82 al. Appl Microbiol Biotechnol (2005) 66: 486-496 and A Look Back at the US Department of Energy's Aquatic Species Program: Biodiesel from Algae, NREL / TP-580-24190, John Sheehan, Terri Dunahay, John Benemann and Paul Roessler (1998 ).
Considerations that affect the selection of microorganisms for use in the invention include, in addition to the production of lipids or hydrocarbons suitable for the production of oils, fuels and oleochemicals, include: (1) high lipid content as a percentage of cell weight; (2) ease of growth; (3) ease of genetic engineering; and (4) ease of processing biomass. In particular embodiments, wild or genetically engineered microorganisms produce cells that are at least 40%, at least 45%, at least 50%, at least 55%, at least 60%, at least 65%, or at least 70% or more of lipids. Preferred organisms grow heterotrophic or can be engineered to do so using, for example, methods disclosed in this document. The ease of transformation and the availability of selectable and promoting, constitutive and / or inducible markers that are functional in the microorganism affect the ease of genetic engineering. Processing considerations may include, for example, the availability of effective means to lyse cells.
In one embodiment, microorganisms include natural or engineered microorganisms that can grow in a heterotrophic condition and use light as a signal to control cellular processes. These can include algae, such as Cyanophyta, Chlorophyta, Rhodophyta, Cryptophyta, Chlorarachniophyta, Haptophyta, Euglenophyta, Heterokontophyta and diatoms.
Seaweed
In one embodiment of the present invention, the micro
19/82 organism is a microalgae. Non-limiting examples of microalgae that can be used according to the present invention are described below.
More specifically, algae taxa belonging to Cyanophyta, including Cyanophyceae, are those being Prokaryotae, have the capacity for photosynthesis type evolution of oxygen and are classified in the following orders and families. Chroococcales includes Microcystaceae, Chroococcaceae, Entophysalidaceae, Chamaesiphoniaceae, Dermocarpellaceae, Xenococcaceae and Hydrococcaceae, Oscillatoriales includes Borziaceae, Pseudanabaenaceae, Schizotrichaceae, Phormidiaceae, Oscillatoriaceae and Homoeotrichaceae, Nostocales includes Scytonemataceae, Microchaetaceae, Rivulariaceae and Nostocaceae and stigonematales includes Chlorogloeopsaceae, Capsosiraceae, Stigonemataceae, Fischerellaceae Borzinemataceae, Nostochopsaceae, and Mastigocladaceae.
Chlorophyta includes Chlorophyceae, Prasinophyceae, Pedinophyceae, Trebouxiophyceae and Ulvophyceae. More specifically, Chlorophyceae includes Acetabularia, Acicularia, Actinochloris, Amphikrikos, Anadyomene, Ankistrodesmus, Ankyra, Aphanochaete, Ascochloris, Asterococcus, Asteromonas, Astrephomene, Atractomorpha, Axilococcus, Axilosphaia, Basichy, Basichy, Basichys , Borodinellopsis, Botryococcus, Brachiomonas, Bracteacoccus, Bulbochaete, Caespitella, Capsosiphon, Carteria, Centrosphaera, Chaetomorpha, Chaetonema, Chaetopeltis, Chaetophora, Chalmasia, Chamaetrichon, Characiochloris, Characiosiphon, Chlamyam, Chlamyd, Chlamyd , Chlorochytrium, Chlorocladus, Chlorocloster, Chlorococcopsis,
20/82
Chlorococcum, Chlorogonium, Chloromonas, Chlorophysalis, Chlorosarcina, Chlorosarcinopsis, Chlorosphaera, Chlorosphaeropsis, Chlorotetraedron, Chlorothecium, Chodatella, Choricystis, Cladophora, Cladophoropsis, Cloniophora, Closteriopsis, Coccobotrys, Coelastrella, Coelastropsis, Coelastrum, Coenochloris, Coleochlamys, Coronastrum, Crucigenia, Crucigeniella, Ctenocladus, Cylindrocapsa, Cylindrocapsopsis, Cylindrocystis, Cymopolia, Cystococcus, Cystomonas, Dactylococcus, Dasycladus, Deasonia, Derbesia, Desmatractum, Desmodesmus, Desmotetra, Diacanthos, Dicellula, Dicloster, Dicranochaete, Dictyochloris, Dictyococcus, dictyosphaeria, Dictyosphaerium, Didymocystis, Didymogenes, Dilabifilum, Dimorphococcus, Diplosphaera, Draparnaldia, Dunaliella, Dysmorphococcus, Echinocoleum, Elakatothrix, Enallax, Entocladia, Entransia, Eremosphaera, Ettlia, Eudorina, Fasciculochloris, Fernandinella, Follicularia, Fottea, Franceia, Ghisoci, Gloria, Frieda loeodendron, Gloeomonas, Gloeotila, Golenkinia, Gongrosira, Gonium,
Graesiella, Granulocystis, Gyorffiana, Haematococcus, Hazenia, Helicodictyon, Hemichloris, Heterochlamydomonas, Heteromastix, Heterotetracystis, Hormidiospora, Hormidium, Hormotila, Hormotilopsis, Hyalococcus, Hyalodium, Hyalodiscus, Hyalodiscus, Hyalodiscus, Hyalodiscus, Hyalodiscus, Hyalodiscus, Hyalodiscus Kirchneriella, Koliella, Lagerheimia, Lautosphaeria, Leptosiropsis, Lobocystis, Lobomonas, Lola, Macrochloris, Marvania, Micractinium, Microdictyon, Microspora, Monoraphidium, Muriella, Mychonastes, Nanochumum, Nautococcus, Neocischem, Neocisis, Neocisis, Neocis Nephrodiella, Oedocladium, Oedogonium, Oocystella, Oocystis, Oonephris, Ourococcus, Pachycladella, Palmella, Palme1lococcus,
21/82
Palmellopsis, Palmodictyon, Pandorina, Paradoxia,
Parietochloris, Pascherina, Paulschulzia, Pectodictyon,
Pediastrum, Pedinomonas, Pedinopera, Percursaria, Phacotus,
Phaeophila, Physocytium, Pilina, Planctonema, Planktosphaeria, Platydorina, Platymonas, Pleodorina, Pleurastrum, Pleurococcus, Ploeotila, Polyedriopsis, Polyphysa, Polytoma, Polytomella, Prasinocladus, Prasiococcus, Protoderma, Protosiphon, Pseudendocloniopsis, Pseudocharacium, Pseudochlorella, Pseudochlorococcum, Pseudococcomyxa, Pseudodictyosphaerium, Pseudodidymocystis, Pseudokirchneriella, Pseudopleurococcus, Pseudoschizomeris, Pseudoschroederia, Pseudostichococcus, Pseudotetracystis, Pseudotetradron, Pseudotrebouxia, Pteromonas, Pulchrasphaera, Pyramimonas, Pyrobotrys, Quadrigula, Radiofilum, Radiosphaera, Raphidocelis, Raphidonema, Raphidonemopsis, Rhizoclonium, Rhopalosolen, Saprochaete, Scenedesmus, Schizochlamys, Schizomeris, Schroederia, Schroederiella, Scotiellopsis, Siderocystopsis, Siphonocladus, Sirogonium, Sorastrum, Spermatozopsis, Sphaerella, Sphaerellocystis, Sphaerellopsis, Sphaerocystis, Sphaeroplea, Spirotaenia, Spongiochloris, Stephanong osphaera, Stigeoclonium, Struvea, Tetmemorus, Tetrabaena, Tetracystis, Tetradesmus, Tetraedron, Tetrallantos, Tetraselmis, Tetraspora, Tetrastrum, Treubaria,
Triploceros, Trochiscia, Trochisciopsis, Ulva, Uronema, Wallonia, Valoniopsis, Ventricaria, Viridiella, Vitreochlamys, Volvox, Volvulina, Westella, Willea, Wislouchiella, Zoochlorella, Zygnemopsis, Hyalotheca, Chlorella, Pseudopleurocaloc. Prasinophyceae includes Heteromastix, Mammella, Mantoniella, Micromonas, Nephroselmis, Ostreococcus, Prasinocladus, Prasinococcus, Pseudoscourfielda, Pycnococcus, Pyramimonas, Scherffelia. Pedinophyceae includes Marsupiomonas, Pedinomonas, Resultor.
22/82
Trebouxiophyceae includes Apatococcus, Asterochloris, Auxenochlorella, Chlorella, Coccomyxa, Desmococcus, Dictyochloropsis, Elliptochloris, Jaagiella, Leptosira, Lobococcus, Makinoella, Microthamnion, Myrmecia, Nannochloris, Priscilla, Trichos, Myrmecia. Ulvophyceae includes Acrochaete, Bryopsis, Cephaleuros, Chlorocystis, Enteromorpha, Gloeotilopsis, Halochlorococcum, Ostreobium, Pirula, Pithophora, Planophila, PseudendocIonium, Trentepohlia, Trichosarcina, Ulothrix, Bolbocoleon, Chaetosiphon, Eugomontia, Oltmannsiellopsis, Pringsheimiella, PseudodendrocIonium, Pseudulvella, Sporocladopsis, Urospora and
Wittrockiella.
Rhodophyta includes Acrochaetium, Agardhiella, Antithamnion, Antithamnionella, Asterocytis, Audouinella, Balbiania, Bangia, Batrachospermum, Bonnemaisonia, Bostrychia, Callithamnion, Caloglossa, Ceramium, Champia, Chroodactylon, Chroothece, Compsopogon, Compsopogon, Compsopogon, Dixoniella, Erythrocladia, Erythrolobas, Erythrotrichia, Flintiella, Galdieria, Gelidium, Glaucosphaera, Goniotrichum, Gracilaria, Grateloupia, Griffithsia, Hildenbrandia,
Hymenocladiopsis, Hypnea, Laingia, Membranoptera,
Myriogramme, Nemalion, Nemnalionopsis, Neoagardhiella, Palmaria, Phyllophora, Polyneura, Polysiphonia, Porphyra, Porphyridium, Pseudochantransia, Pterocladia, Pugetia, Rhodella, Rhodochaete, Rhodochorton, Rhodosoria, Solosia, Rhodosporia, Rhodosporia, Rhodosporia, Rhodosporia Stylonema, Thorea, Trailiella and Tuomeya.
Cryptophyta includes Cryptophycease. More specifically, Campylomonas, Chilomonas, Chroomonas,
23/82
Cryptochrysis, Cryptomonas, Goniomonas, Guillardia, Hanusia, Hemiselmis, Plagioselmis, Proteomonas, Pyrenomonas, Rhodomonas and Stroreatula.
Chlorarachniophyta includes Chlorarachnion, Lotharella and Chattonella.
Haptophyta includes Apistonema, Chrysochromulina, Coccolithophora, Corcontochrysis, Cricosphaera, Diacronema, Emiliana, Pavlova, Ruttnera, Cruciplacolithus, Prymnesium, Isochrysis, Calyptrosphaera, Chrysotila, Chrysotis, Pysheria, Geysysisis, Hicher, Chrysotis Syracosphaera and Pleurochrysis.
Euglenophyta includes stasia, Colacium, Cyclidiopsis, Distigma, Euglena, Eutreptia, Eutreptiella, Gyropaigne, Hyalophacus, Khawkinea Astasia, Lepocinclis, Menoidium, Parmidium, Phacus, Rhabdomonas, Rhabdospira, Tetruetreptia and Tetruetreptia.
Heterokontophyta includes Bacillariophyceae, Phaeophyceae, Pelagophyceae, Xanthophyceae, Eustigmatophyceae, Syanurophyceae, Phaeothamniophyceae and Raphidophyceae. More specifically, Bacillariophyceae includes Achnanthes, Amphora, Chaetoceros, Bacillaria, Nitzschia, Navicula and Pinnularia. Phaeophyceae includes Ascoseira, Asterocladon, Bodanella, Desmarestia, Dictyocha, Dictyota, Ectocarpus, Halopteris, Heribaudiella, Pleurocladia, Porterinema, Pylaiella, Sorocarpus, Spermatochnus, Sphacelaria and Waerniella. Pelagophyceae includes Aureococcus, Aureoumbra, Pelagococcus, Pelagomonas, Pulvinaria and Sarcinochrysis. Xanthophyceae includes Chloramoebales, Rhizochloridales, Mischococcales, Tribonematales and Vaucheriales. Eustigmatophyceae includes Chloridella, Ellipsoidion, Eustigmatos, Monodopsis, Monodus, Nannochloropsis, Polyedriella, Pseudocharaciopsis,
24/82
Pseudostaurastrum and Vischeria. Syanurophyceae includes Allomonas, Synura and Tessellaria. Phaeothamniophyceae includes Phaeobotrys and Phaeothamnion. Raphidophyceae includes Olisthodiscus, Vacuolaria and Fibrocapsa.
Diatoms include Bolidophyceae,
Coscinodiscophyceae, Dinophyceae and honeycombs. Bolidophyceae includes Bolidomonas, Chrysophyceae, Giraudyopsis,
Glossomastix, Chromophyton, Chrysamoeba, Chrysochaete, Chrysodidymus, Chrysolepidomonas, Chrysosaccus,
Chrysosphaera, Chrysoxys, Cyclonexis, Dinobryon, Epichrysis, Epipyxis, Hibberdia, Lagynion, Lepochromulina, Monas, Monochrysis, Paraphysomonas, Phaeoplaca, Phaeoschizochlamys, Picophagus, Pleurochrysis, Urtiche
Coscinodiscophyceae includes Bacteriastrum, Bellerochea, Biddulphia, Brockmanniella, Corethron, Coscinodiscus,
Eucampia, Extuboce1lulus, Guinardia, Helicotheca, Leptocylindrus, Leyanella, Lithodesmium, Melosira,
Minidiscus, Odontella, Planktoniella, Porosira, Proboscia, Rhizosolenia, Stellarima, Thalassionema, Bicosoecid, Symbiomonas, Actinocyclus, Amphora, Arcocellulus, Detonula, Diatoma, Ditylum, Fragilariophyceae, Asterionellismato, ephinephora, Deline
Tabularia. Dinophyceae includes Adenoides, Alexandrium, Amphidinium, Ceratium, Ceratocorys, Coolia, Crypthecodinium, Exuviaella, Gambierdiscus, Gonyaulax, Gymnodinium, Gyrodinium, Heterocapsa, Katodinium, Lingulodinium, Pfiesteria, Syella, Syndrome, Polar, Protector, Polar, Honeycombs include Cystodinium, Glenodinium, Oxyrrhis, Peridinium, Prorocentrum and Woloszynskia.
Cultivation Methods of Microorganisms and Bioreactors
Microorganisms are generally grown both
25/82 for the purpose of carrying out genetic manipulations as well as for the subsequent production of hydrocarbons (for example, lipids, fatty acids, aldehydes, alcohols and alkanes). The old type of culture is generally conducted on a small scale and, initially, at least, under conditions where the starting microorganism can grow. Culture for the purpose of hydrocarbon production is generally conducted on a large scale. Preferably a fixed carbon source (for example, a raw material) is present. The culture can also be exposed to light for some time or all the time.
Bioreactor
Microalgae can be grown in liquid media. The culture may be contained in a bioreactor. Microalgae can also be grown in photobioreactors that contain a fixed carbon source and allow light to reach cells. Exposing microalgae cells to light, even in the presence of a fixed carbon source that the cells transport and use, can accelerate growth compared to growing cells in the dark. The cultivation condition parameters can be manipulated to optimize the production of total hydrocarbons, the combination of hydrocarbon species produced and / or the production of a hydrocarbon species.
Figure 1 is an embodiment of a bioreactor of the invention. In one respect, a bioreactor is a photobioreactor. In one aspect, a bioreactor system can be used to grow microalgae. The bioreactor system can include a container and an irradiation set, where the irradiation set is operably coupled to the container.
In one aspect, a bioreactor is a fermentation tank used for industrial fermentation processes.
26/82
In some embodiments, a bioreactor includes glass, metal or plastic tanks, equipped, for example, with gauges and adjustments to control aeration, agitation rate, temperature, pH and other parameters of interest. Generally, the gauges and settings are operatively coupled to the bioreactor.
In one respect, a bioreactor can be small enough for bench top applications (5-10 L or less) or up to 120,000 L or greater in capacity for large-scale industrial applications.
In some embodiments, the bioreactor system may include a light scattering structure or a plurality of light scattering structures. In some embodiments, one or more of the light scattering structures of the plurality of light scattering structures are located along the inner surface of the bioreactor. In some embodiments, the light diffusion structure is operatively coupled to the bioreactor.
The bioreactor system can include one or more optical fibers and / or a plurality of light sources and / or a light source. In some embodiments, one or more optical fibers are mounted on protective and optically transparent lighting structures. In some embodiments, the optical fiber is operatively coupled to the bioreactor. In some embodiments, the light source is operatively coupled to the bioreactor.
In some embodiments, the bioreactor system may include a lighting structure operatively coupled to a bioreactor. In certain embodiments in this document, a lighting structure can take any shape or form as it directs the light signal into a bioreactor. The bioreactor system can also include at least one optical fiber that extends from
27/82 a first end of at least one of the one or more optical fibers to a portion of a solar energy collector. In some embodiments, the solar energy collector is operatively coupled to the bioreactor. The optical fiber can be adapted to optically couple the solar energy collector to the bioreactor. The optical fiber can be optically coupled (directly or indirectly) to the solar collector.
In some embodiments, the bioreactor system 10 includes a plurality of light sources operatively coupled to the bioreactor. The plurality of light sources can include multiple LEDs. The plurality of light sources comprising multiple LEDs may be operable to provide the entire spectrum or a specific wavelength of artificial light for a bioreactor.
In one embodiment, an LED is mounted on protective and optically transparent lighting structures. In one embodiment, the LED is an array of LEDs.
In some embodiments, microalgae can be grown and kept in closed bioreactors made of different types of transparent or semi-transparent material. Such material can include Plexiglass ™ compartments, glass compartments, bags made of substances such as polyethylene, transparent or semi-transparent tubes and other materials. Microalgae can be grown and kept in open bioreactors such as raceway ponds, adjustment tanks and other unopened containers.
The gas content of a bioreactor to grow micro30 organisms like microalgae can be manipulated. Part of the volume of a bioreactor can contain gas instead of liquid. The gas inlets can be used to pump gases into the bioreactor. Any gas can be pumped to
28/82 inside a bioreactor, including air, mixtures of air / 0 ₂ , noble gases, such as argon and others. The rate of entry of gas into a bioreactor can also be manipulated. Increasing the gas flow to a bioreactor increases the turbidity of a microalgae culture. The placement of doors that carry gases into a bioreactor can also affect the turbidity of a crop at a given gas flow rate. Air / 0 ₂ mixtures can be modulated to generate optimal amounts of 0 ₂ for maximum growth by a particular organism. Microalgae grow significantly faster under light, for example, 3% O ₂ /97% air than 100% air. Three percent O ₂ /97% air is approximately 100 times more 0 ₂ than that found in air. For example, mixtures of air: O ₂ of about 99.75% air: 0.25% O ₂ , about 99.5% air: 0.5% O ₂ , about 99.0% air: 1.00% O ₂ , about 98.05 air: 2.0% O ₂ , about 97.0% air: 3.0% 0 ₂ , about 96.0% air: 4.0% O ₂ 2 and about 95.00% air: 5.0% O ₂ can be infused in a bioreactor or bioreactor.
Microalgae cultures can also be subjected to mixing using devices such as paddles and rotating turbines, to balance a culture, stir bars, pressurized gas infusion and other instruments.
Bioreactors can have doors that allow gases, solids, semi-solids and liquids to enter the chamber containing the microalgae. Doors are generally connected to piping or other means of transporting substances. Gas gates, for example, carry gases into the culture. The pumping of gases into a bioreactor can serve both to feed cells with O ₂ and other gases and to aerate the culture and, therefore, generate turbidity. The amount of turbidity in a crop varies as the number and position of gas ports are changed. Per
For example, gas doors can be placed along the bottom of a cylindrical polyethylene bag. Microalgae grow faster when 0 ₂ is added to the air and bubbled into a bioreactor.
Bioreactors preferably have one or more doors that allow media to enter. It is not necessary for just one substance to enter or exit a door. For example, a port can be used to flow culture media to the bioreactor and then later can be used for sampling, gas inlet, gas outlet or other purposes. In some cases, a bioreactor is filled with culture media at the beginning of a culture and growth media are no longer infused after the culture is inoculated. In other words, microalgae biomass is grown in an aqueous medium for a period of time during which the microalgae reproduce and increase in number; however, amounts of aqueous culture medium are not fluid through the bioreactor during the entire period of time. Thus, in some embodiments, the aqueous culture medium does not flow through the bioreactor after inoculation.
In other cases, the culture media can flow through the bioreactor for the entire period of time during which the microalgae reproduce and increase in number. In some embodiments, the media is infused into the bioreactor 25 after inoculation, but before the cells reach a desired density. In other words, a turbulent flow regime of gas inlet and media inlet is not maintained for reproduction of microalgae, until a desired increase in the number of said microalgae has been achieved.
0 Bioreactors preferably have one or more doors that allow gas to enter. The gas can serve both to provide nutrients, such as O ₂ , and to provide turbulence in the culture media. Turbulence can be achieved
30/82 by placing a gas inlet port below the level of the aqueous culture media, so that the gas entering the bioreactor bubbles on the surface of the culture. One or more gas outlet ports allow the gas to escape, thereby preventing pressure build-up in the bioreactor. Preferably, a gas outlet port leads to a one-way valve that prevents contaminating microorganisms from entering the bioreactor. In some cases, the cells are grown in a bioreactor for a period of time during which the microalgae reproduce and increase in number, however, a turbulent flow regime with turbulent eddies predominantly by all culture media, caused by the entry of gas is not maintained for the entire period of time. In other cases, a turbulent flow regime with turbulent eddies predominantly by all culture media, caused by gas entry, can be maintained for the entire period of time during which the microalgae reproduce and increase in number. In some cases, a predetermined range of proportions between the bioreactor scale and the whirlpool scale is not maintained during the period of time during which the microalgae reproduce and increase in number. In other cases, this interval can be maintained.
Bioreactors, preferably, have at least one port that can be used for sampling the culture. Preferably, a sampling port can be used repeatedly without altering the compromise of the axenic nature of the culture. A sampling port can be configured with a valve or other device that allows sample flow to be stopped and started. Alternatively, a sampling port may allow continuous sampling. Bioreactors, preferably, have at least one port that allows the inoculation of a culture. This port can also be used for other purposes, such as media entry
31/82 or gas.
In one embodiment, a bioreactor with an irradiation system can be used to produce hydrocarbons from Botryococcus. Botriococenes are unbranched isoprenoid triterpenes that have the formula C _n H ₂ n-io · Lane A produces alkadiene and alkatriene (derived from fatty acids), where n is an odd number from 23 to 31. Lane B produces botriococene , where n is in the range of 30 to 40. These can be biofuels of choice for hydrocracking for gasoline-type hydrocarbons.
Means
Microalgae culture media typically contain components such as a source of fixed nitrogen, trace elements, optionally a buffer for maintaining pH, and phosphate. Other components may include a fixed carbon source, such as acetate or glucose and salts, such as sodium chloride, particularly for marine microalgae. Examples of trace elements include zinc, boron, cobalt, copper, manganese and molybdenum, for example, in the respective forms of ZnCl ₂ , H ₃ BO ₃ , CoC1 ₂ .6H ₂ 0, CuC1 ₂ .2H ₂ O, MnCl ₂ .4H ₂ O e (NH ₄ ) ₆ Mo ₇ 0 ₂ 4. 4H ₂ O.
For organisms capable of growing on a fixed carbon source, the fixed carbon source can be, for example, glucose, fructose, sucrose, galactose, xylose, mannose, rhamnose, N-acetylglycosamine, glycerol, floridoside or glucuronic acid. One or more sources of carbon can be supplied at a concentration of less than 50 μΜ, at least about 50 μΜ, at least about 100 μΜ, at least about 500 μΜ, at least about 5 mM, at least about 5 0 mM, at least about 500 mM and more than 500 mM from one or more sources of fixed carbon provided exogenously. One or more carbon sources can be supplied in less than 1%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12% , 13%,
32/82
14%, 15%, 16% , 17% , 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28% , 29% , 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40% , 41% , 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52% , 53% , 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64% , 65% , 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76% , 77% , 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88% , 89% , 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, OR 100% of the means. An or more sources of carbon
they can also be provided in a percentage of the media among the percentages mentioned above, for example, 2.5% or 3.7% of the media.
Some microorganisms naturally grow or can be engineered to grow in a fixed carbon source that is a heterogeneous source of compounds, such as urban waste, secondary treated sewage, waste water and other sources of fixed carbon and other nutrients, such as sulfates, phosphates and nitrates. The sewage component serves as a source of nutrients in hydrocarbon production, and the crop provides an inexpensive source of hydrocarbons.
Other culture parameters can also be manipulated, such as the pH of the culture media, the identity and concentration of trace elements and other constituents of the media.
Microorganisms useful according to the methods of the present invention are found in various locations and environments throughout the world. As a result of their isolation from other species and their resulting evolutionary divergence, the particular growth medium for optimal growth and the generation of lipid and / or hydrocarbon constituents may vary. In some cases, certain strains of microorganisms may be unable to grow in a particular growth medium because of the presence of some inhibitory component or absence
33/82 of some essential nutritional requirement required by the particular strain of microorganism.
Solid and liquid growth media are generally available from a wide variety of sources, and instructions for the preparation of particular media that are suitable for a wide variety of strains of microorganisms can be found, for example, online at a website maintained by the University of Texas at Austin for its algae culture collection (UTEX).
Process conditions can be adjusted to increase the yield of lipids suitable for a particular use and / or to reduce the cost of production. For example, in certain embodiments, a microbe (for example, microalgae) is grown in the presence of a limiting concentration of one or more nutrients, such as, for example, carbon and / or nitrogen, phosphorus, or sulfur, while providing an excess of fixed carbon energy, such as glucose. Nitrogen limitation tends to increase the yield of microbial lipids over the yield of microbial lipids in a culture where nitrogen is supplied in excess. In particular embodiments, the increase in lipid yield is at least about: 10%, 20%, 30%, 40%, 50%, 75%, 100%, 200%, 300%, 400%, or 500 %. Microbes can be grown in the presence of a limited amount of a nutrient for part of the total growing period or for the entire period. In particular embodiments, the concentration of nutrients is in a cycle between a limiting concentration and a non-limiting concentration at least twice during the total growing period.
Heterotrophic Growth and Light
Microorganisms can be grown under heterotrophic growth conditions, where a fixed carbon source provides energy for growth and accumulation of
34/82 lipids.
Standard methods for heterotrophic growth and propagation of microalgae are known (see, for example, Miao and Wu, J Biotechnology, 2004, 11: 85-93 and Miao and Wu, Biosource Technology (2006) 97: 841-846).
For the production of hydrocarbons, cells, including recombinant cells of the invention described in this document, can be grown or fermented in large quantities. Cultivation can be in large liquid volumes, as in suspension cultures as an example. Other examples include starting with a small cell culture that expands into large biomass in combination with cell growth and propagation, as well as hydrocarbon production. Steel bioreactors or fermenters can be used to accommodate large volumes of culture. A bioreactor can include a fermenter. A fermenter similar to that used in the production of beer and / or wine may be suitable, since they are extremely large fermenters used in the production of ethanol.
Nutrient sources suitable for culture in a fermenter are provided. These include raw materials such as one or more of the following: a fixed carbon source, such as glucose, corn starch, depolymerized cellulosic material, sucrose, sugar cane, sugar beet, lactose, whey, or molasses; a source of fat, such as vegetable fats or oils; a source of nitrogen, such as protein, soy flour, corn steeping water, ammonia (pure or in the form of salt), nitrate or nitrate salt, or molecular nitrogen; and a source of phosphorus, such as phosphate salts. In addition, a fermenter allows the control of culture conditions, such as temperature, pH, oxygen tension and carbon dioxide levels. Optionally, gaseous components, such as oxygen or
35/82 nitrogen, can be bubbled in a liquid culture. Other sources of starch (glucose) such as wheat, potatoes, rice and sorghum. Other sources of carbon include process streams, such as technical grade glycerol, black liquor, organic acids such as acetate, and molasses. Carbon sources can also be provided as a mixture, such as a mixture of sucrose and depolymerized sugar beet pulp.
A fermenter can be used to allow cells to undergo the various stages of their growth cycle. For example, an inoculum of hydrocarbon-producing cells can be introduced into a medium followed by a period of latency (lag phase) before the cells begin to grow. After the latency period, the growth rate constantly increases and enters the log, or exponential, phase. The exponential phase, in turn, is followed by a slowdown in growth due to the reduction of nutrients and / or increases in toxic substances. After this slowdown, growth stops and the cells enter a stationary phase or steady state, depending on the particular environment provided for the cells.
The production of hydrocarbons by cells disclosed in this document may occur during the log phase or later, including the stationary phase in which nutrients are provided, or are additionally available, to allow the continuation of hydrocarbon production in the absence of cell division.
Preferably, microorganisms grown using conditions described herein and known in the art comprise at least about 20% by weight of lipids, preferably at least about 40% by weight, more preferably at least about 50% by weight, and more preferably at least about 60% by weight.
In an alternative method of growth
36/82 heterotrophic according to the present invention, microorganisms can be grown using depolymerized cellulosic biomass as raw material. Cellulosic biomass (for example, fodder, such as maize fodder) is cheap and easily available; however, attempts to use this material as a raw material for yeast have failed. In particular, such raw material was considered to be inhibitory to yeast growth and yeasts cannot use the 5-carbon sugars produced from cellulosic materials (for example, hemicellulose xylose). In contrast, microalgae can grow on processed cellulosic material. Consequently, the invention provides a method for growing microalgae in the presence of a cellulosic material and / or a 5-carbon sugar.
Suitable cellulosic materials include herbaceous residues and woody energy crops, as well as agricultural crops, that is, parts of plants, mainly stems and leaves, not removed from the fields with the main food product or fiber. Examples include agricultural residues, such as cane bagasse, rice husks, corn fiber (including stalks, leaves, husks and cobs), wheat straw, rice straw, sugar beet pulp, citrus pulp, citrus husks; forest residues, such as thinning of hardwood and conifers, and residues of hardwood and conifers from timber operations; wood residues such as metalwork residues (wood chips, sawdust) and pulp mill residues; urban waste such as paper fractions of solid urban waste, urban wood waste and green urban waste, such as municipal grass clippings; and wood construction waste. Additional cellulosics include dedicated cellulosic cultures such as switchgrass, hybrid poplar and miscanthus, fiber cane and fiber sorghum.
37/82
The five-carbon sugars that are produced from these materials include xylose.
In addition another alternative method of heterotrophic growth according to the present invention, which in turn can optionally be used in combination with the methods described above, sucrose, produced, for example, from sugar cane or sugar beet, it is used as a raw material.
Heterotrophic growth may include the use of both light and a fixed carbon source (s) for cells to grow and produce hydrocarbons. Heterotrophic growth can be conducted in a photobioreactor.
Bioreactors can be exposed to one or more light sources to provide microalgae with a light signal. A light signal can be provided through light directed to a surface of the bioreactor by a light source. Preferably, the light source provides an intensity that is sufficient for cells to grow, but not as intense as to cause oxidative damage or cause a photoinhibitory response. In some cases, a light source has a wavelength range that mimics or approximately mimics the range of the sun. In other cases, a different wavelength range is used. Bioreactors can be placed outdoors or in a greenhouse or other facility that allows sunlight to reach the surface. In some embodiments, photointensities for species of the genus Botryococcus are between 25 and 500 pmE m ² s ¹ (see, for example, Photosynth Res. 2005 June; 84 (1-3): 21-7).
The number of photons reaching a microalgae cell culture can be manipulated, as well as other parameters such as the wavelength spectrum and the proportion of hours of darkness: light per day. Microalgae can also be grown in natural light, as well as combinations
38/82 simultaneous and / or alternating natural and artificial light. For example, microalgae can be grown under natural light during the hours of the day and under artificial light during the hours of the night.
In one aspect of the invention, a microorganism is exposed to about 0.1% to about 1% of the light irradiance required for photosynthesis, preferably about 0.3% to about 0.8% of the required light irradiance for photosynthesis by the body. The typical light irradiance can be between 0.1 - 300. pmol of photons m ' ² s' ¹ including
less than 0, 1, 0.1, 0.2, 0.3, 0.4, 0 , 5, 0.6 , 0.7, 0.8, 0.9, 1,2,3 , 4, 5, 6, 7 , 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51 to 99 , 100, 101 to 149 , 150, 151, 199, 200,
201 to 249, 250, or more than 250 .pmol of photons m ' ² s' ¹ . The light irradiance can be about 0.01-1 pmol of photons m ' ² s' ¹ , preferably between 1-10 pmol of photons m ² s ¹ , or between 10-100 pmol of photons m ' ² s' ¹ , or between 100-300 pmol of photons m ' ² s' ¹ , or between 100-300 pmol of photons m ' ² s' ¹ . Light irradiance is also included among the light irradiance mentioned above, for example, 1.1, 2.1, 2.5 or
3.5 pmol of photons ms.
In one aspect, different light spectra (for example, 360-700 nm) can be used. The light spectra can be less than 300, 300, 350, 400, 450, 500, 550, 600, 650, 700 or 750 nm or more. Also included are the light spectra among the light spectra mentioned above, for example, 360 or 440 nm.
In one embodiment, irradiation can be applied continuously. In another embodiment, the irradiation can be applied in a cyclic pattern with an appropriate lighting period, including, among others, 12h of light: 12h of dark
39/82 or 16h of light: 8h of dark. Light patterns can include less than 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 , 21, 22, 23, or 24 h of light and / or less than 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, or 23 hours (h) in the dark. Also included are the light patterns among the light patterns mentioned above, for example, 7.5 h of light or 7.5 h of dark.
In one embodiment, irradiation can be natural sunlight collected by a solar collector and transmitted to the interior of a bioreactor through an optical fiber.
In another embodiment, artificial light, such as fluorescent or light emitting diode (LED) light, can be used as a light source. In another embodiment, natural sunlight and artificial light can be used together.
In one embodiment, irradiation is a complete spectrum of light.
In another embodiment, irradiation is a specific wavelength of light or an interval of light spectrum transmitted through a specific filter.
Methods for Recovering Lipids and Hydrocarbons
Hydrocarbons (for example, lipids, fatty acids, aldehydes, alcohols and alkanes) produced by the cells of the invention can be harvested, or otherwise collected, by any convenient means. For example, the hydrocarbons secreted from the cells can be centrifuged to separate the hydrocarbons in a hydrophobic fraction from the contaminants into an aqueous fraction and, optionally, from any solid materials, such as a precipitate, after centrifugation. The material containing the cell or cell fractions can be treated with proteases to degrade contaminating proteins before or after centrifugation. In some cases, contaminating proteins
40/82 are associated, possibly covalently, to hydrocarbons or hydrocarbon precursors that form hydrocarbons after protein removal. In other cases, the hydrocarbon molecules are in a preparation that also contains proteins. Proteases can be added to hydrocarbon preparations containing proteins, to degrade proteins (for example, Streptomyces griseus protease can be used (Sigma Aldrich catalog number P5147). After digestion, hydrocarbons are preferably 10 purified from proteins waste, peptide fragments and amino acids.This purification can be done, for example, by the methods listed above such as centrifugation and filtration.
Extracellular hydrocarbons can also be extracted in vivo from living microalgae cells which are then returned to a bioreactor by exposing the cells, in an otherwise sterile environment, to a non-toxic extraction solvent, followed by separation of the cells. and the hydrophobic fraction of extraction solvent and 20 hydrocarbons, in which the separate living cells are then returned to a culture vessel, such as a photobioreactor or stainless steel fermenter (see, Biotechnol Bioeng. 2004 Dec. 5; 88 ( 5): 593-600 and Biotechnol Bioeng. 2004 Mar. 5; 85 (5): 475-81).
Hydrocarbons can also be isolated by total cell extraction. The cells are first disrupted and then the intracellular hydrocarbons and associated with the cell membrane / cell wall, as well as extracellular hydrocarbons can be collected from the total cell mass, 30 as by using centrifugation as described above.
Several methods are available for separating hydrocarbons and lipids from cell lysates produced by the above methods. For example,
41/82 hydrocarbons can be extracted with a hydrophobic solvent such as hexane (see, Frenz et al. 1989, Enzyme Microb. Technol., 11: 717). Hydrocarbons can also be extracted using liquefaction (see, for example, Sawayama et al.1999, Biomass and Bioenergy 17: 33-39 and Inoue et al.1993, Biomass Bioenergy 6 (4): 269-274); petroleum liquefaction (see, for example, Minowa et al., 1995, Fuel 74 (12): 1735-1738); and extraction with supercritical CO ₂ (see, for example, Mendes et al. 2003, Inorgânica Chimica Acta 356: 328-334).
Miao and Wu describe a lipid recovery protocol from microalgae from a culture in which the cells were collected by centrifugation, washed with distilled water and dried by lyophilization. The resulting cell powder was sprayed on a mortar and then extracted with n-hexane. Miao and Wu, Biosource Technology (2006) 97: 841-846.
Lysing Cells
Intracellular lipids and hydrocarbons produced in microorganisms are, in some embodiments, extracted after lysis of the microorganism's cells. Once extracted, lipids and / or hydrocarbons can be further refined to produce, for example, oils, fuels or oleochemicals.
After completion of cultivation, microorganisms can be separated from the fermentation broth. Optionally, the separation is carried out by centrifugation to generate a concentrated paste. Centrifugation does not remove significant amounts of intracellular water from microorganisms and is not a drying step. The biomass can then be washed with a washing solution (eg Dl water) to get rid of the fermentation broth and debris. Optionally, the washed microbial biomass can also be dried (oven dried, lyophilized, etc.) before the cells break. In
42/82 Alternatively, the cells can be lysed without separating part or all of the fermentation broth when fermentation is complete. For example, cells may be in a ratio of less than 1: 1 v: v cells to extracellular fluid when cells are lysed.
Microorganisms containing a lipid and / or hydrocarbons can be lysed to produce a lysate. As detailed in this document, the step of lysing a microorganism (also referred to as cell lysis) can be achieved by any convenient means, including heat induced lysis, adding a base, adding an acid, using enzymes such as proteases and enzymes from polysaccharide degradation, such as amylases, using ultrasound, mechanical lysis, using osmotic shock, infection by a lytic virus, and / or expression of one or more lytic genes. Lysis is performed to release intracellular molecules that have been produced by microorganisms. Each of these methods for smoothing a microorganism can be used as a single method or in combination, simultaneously or sequentially.
The extent of cell disruption can be seen by microscopic analysis. Using one or more of the methods described in this document, typically more than 70% cell disruption is observed. Preferably, the cell disruption is more than 80%, more preferably more than 90% and more preferred, about 100%.
In particular embodiments, the microorganism is lysed after growth, for example, to increase exposure of cellular lipids and / or hydrocarbons to subsequent extraction or processing. The timing of lipase expression (for example, via an inducible promoter) or cell lysis can be adjusted to improve the yield of lipids and / or hydrocarbons. Below are a number of lysis techniques. These techniques can
43/82 be used individually or in combination.
Heat Induced Lysis
In a preferred embodiment of the present invention, the step of lysing a microorganism comprises heating a cell suspension containing the microorganism. In this embodiment, the fermentation broth containing the microorganisms (or a suspension of microorganisms isolated from the fermentation broth) is heated until the microorganisms, that is, the cell walls and membranes of the microorganisms degrade or rupture. Typically, the applied temperatures are at least 50 ° C. Higher temperatures, such as at least 30 ° C, at least 60 ° C, at least 70 ° C, at least 80 ° C, at least 90 ° C, at least 100 ° C, at least 110 ° C, at least 120 ° C, at least 130 ° C or greater are used for more efficient cell lysis.
The lysis of cells by heat treatment can be carried out by boiling the microorganism. Alternatively, a heat treatment (without boiling) can be carried out in an autoclave. The heat treated lysate can be cooled for further treatment.
Cell disruption can also be accomplished by steam treatment, that is, through the addition of pressurized steam. Steam treatment of microalgae for cell disruption is described, for example, in Pat. No. 6,750,048.
Lise Using a Base
In another preferred embodiment of the present invention, the step of lysing a microorganism comprises adding a base to a cell suspension containing the microorganism.
The base must be strong enough to hydrolyze at least part of the protein compounds of the microorganisms used. The bases that are useful for solubilizing proteins are known in the art of Chemistry.
44/82
Exemplary bases which are useful in the methods of the present invention include, but are not limited to, hydroxides, carbonates and bicarbonates of lithium, sodium, potassium, calcium and mixtures thereof. A preferred base is KOH. Microalgae-based treatment for cell disruption is described, for example, in Pat. No. 6,750,048.
Acid Lysis
In another preferred embodiment of the present invention, the step of lysing a microorganism comprises adding an acid to a cell suspension containing the microorganism. Acid lysis can be affected using an acid with a concentration of 10-500 mN or preferably 40-160 nM. Acid lysis is preferably carried out above room temperature (for example, at 40-160 ° C and preferably at a temperature of 50-130 ° C. For moderate temperatures (for example, at room temperature at 100 ° C and particularly at room temperature at 65 ° C) , acid treatment can be usefully combined with sonication or other methods of cell disruption.
Lysing Cells Using Enzymes
In another preferred embodiment of the present invention, the step of lysing a microorganism comprises lysing the microorganism using an enzyme. The preferred enzymes to lyse a microorganism are proteases and enzymes that degrade polysaccharides, such as hemicellulase (for example, Aspergillus niger hemicellulase; Sigma Aldrich, St. Louis, Mo .; # H2125), pectinase (for example, pectinase Rhizopus sp .; Sigma Aldrich, St. Louis, Mo .; # P2401), Mannaway 4.0 L (Novozymes), cellulase (e.g., Trichoderma viride cellulose; Sigma Aldrich, St. Louis, Mo .; # C9422) and driselase (e.g., Basidiomycetes sp. driselase; Sigma Aldrich, St. Louis, Mo .; # D9515.
Cellulases
45/82
In a preferred embodiment of the present invention, a cellulase to lyse a microorganism is an enzyme that degrades polysaccharides, optionally Chlorella or a Chlorella virus.
Proteases
Proteases such as Streptomyces griseus protease, chymotrypsin, proteinase K, proteases listed in Degradation of Polylactide by Commercial Proteases, Oda Y et al., Journal of Polymers and the Environment, Volume 8, Number 1, January 2000, pp. 29-32 (4) and other proteases can be used to lyse microorganisms. Other proteases that can be used include Alcalase 2.4 FG (Novozymes) and Flavorourme 100 L (Novozymes).
Combinations
Any combination of a protease and an enzyme that degrades polysaccharides can also be used, including any combination of the previous proteases and enzymes that degrade polysaccharides.
Lysing Cells Using Ultrasound
In another preferred embodiment of the present invention, the step of lysing a microorganism is performed using ultrasound, i.e., sonication. Thus, the cells can also be lysed with high frequency sound. The sound can be produced electronically and transported through a metal tip to a properly concentrated cell suspension. This sonication (or ultrasonication) disrupts cell integrity based on the creation of cavities in the cell suspension.
Mechanical Lysis
In another preferred embodiment of the present invention, the step of lysing a microorganism is carried out by mechanical lysis. The cells can be mechanically lysed and, optionally, homogenized to facilitate the collection of
46/82 hydrocarbons (for example, lipids). For example, a pressure regulator can be used to pump a slurry containing cells through a restricted orifice valve. High pressure (up to 1500 bar) is applied, followed by an instantaneous expansion through an outlet nozzle. O , . cell disruption is accomplished by three different mechanisms: impact on the valve, high liquid shear in the * - orifice and sudden pressure drop after discharge, causing an explosion of the cell. The method releases intracellular molecules.
Alternatively, a ball mill can be used.
In a ball mill, the cells are agitated in suspension with small abrasive particles, such as microspheres. The cells are disrupted due to the shear force, grinding between microspheres and collisions with the microspheres. Microspheres disrupt cells to release cellular content. The cells can also be disrupted by shear forces, as with the use of liquefaction (as with a Waring or high-speed blender as examples), a French press, or even centrifugation in the case of weak cell walls, to disrupt cells.
Lysing Cells by Osmotic Shock (Cytolysis) In another preferred embodiment of the present invention, the step of lysing a microorganism is accomplished by applying an osmotic shock.
Lytic Virus Infection
In a preferred embodiment of the present invention, the step of lysing a microorganism comprises infecting the microorganism with a lytic virus. A wide variety of viruses are known to lyse microorganisms suitable for use in the present invention, and the selection and use of a particular lytic virus for a particular microorganism is within the skill level in the art.
47/82
For example, the Chlorella virus in Paramecium bursaria (PBCV-1) is the prototype of a group (family Phycodnaviridae, genus Chlorovirus) of large, icosahedral, plaque-forming, double-stranded DNA viruses that replicate in and lyse, certain unicellular green, eukaryotic algae similar to Chlorella. Consequently, any susceptible microalgae can be lysed by infecting the culture with a suitable Chlorella virus. See, for example, Adv. Virus Res. 2006; 66: 293-336; Virology, 1999 Apr. 25; 257 (1): 15-23, - Virology, 2004 Jan. 5; 318 (1): 214-23; Nucleic Acids Symp. 2000; (44): 161-2, - J. Virol.2006 March; 80 (5): 2437-44; and Annu. Rev. Microbiol. 1999; 53: 44794.
Autolysis (Expression of a Litical Gene)
In another preferred embodiment of the present invention, the step of lysing a microorganism comprises autolysis. In this embodiment, a microorganism according to the invention is genetically engineered to produce a lytic protein that will lyse the microorganism. This lytic gene can be expressed using an inducible promoter so that cells can first be grown to a desirable density in a fermenter, followed by induction of the promoter to express the lytic gene to lyse the cells. In one embodiment, the lytic gene encodes an enzyme that degrades polysaccharides.
In certain other embodiments, the lytic gene is a gene for a lytic virus. Thus, for example, a lytic gene from a Chlorella virus can be expressed in an algal cell of the Chlorella genus, such as C. protothecoides.
Suitable expression methods are described in this document with respect to the expression of a lipase gene. The expression of lytic genes is preferably done using an inducible promoter, such as an active promoter in
48/82 microalgae that is induced by a stimulus, such as the presence of a small molecule, light, heat and other stimuli. For example, see Virology 260, 308-315 (1999); FEMS Microbiology Letters 180 (1999) 45-53; Virology 263, 376-387 (1999); and virology 230, 361-368 (1997).
Extraction of Lipids and Hydrocarbons
The lipids and hydrocarbons generated by the microorganisms of the present invention can be recovered by extraction with an organic solvent. In some cases, the preferred organic solvent is hexane. Typically, the organic solvent is added directly to the lysate without prior separation of the lysate components. In one embodiment, the lysate generated by one or more of the methods described above comes in contact with an organic solvent for a period of time sufficient to allow the lipid and / or hydrocarbon components to form a solution with the organic solvent. In some cases, the solution can then be further refined to recover specific desired hydrocarbon or lipid components. Hexane extraction methods are well known in the art.
Methods for Processing Lipids and Hydrocarbons Enzyme Modification
The hydrocarbons (for example, lipids, fatty acids, aldehydes, alcohols and alkanes) produced by cells as described in this document can be modified by the use of one or more enzymes, including a lipase. When hydrocarbons are in the extracellular environment of cells, one or more enzymes can be added to that environment under conditions where the enzyme modifies the hydrocarbon or concludes its synthesis from a hydrocarbon precursor. Alternatively, hydrocarbons can be partially, or completely, isolated from cellular material
49/82 before adding one or more catalysts, such as enzymes. These catalysts are added exogenously, and their activity occurs outside the cell or in vitro.
Thermal and Other Catalytic Modification
Hydrocarbons produced by cells in vivo, or enzymatically modified in vitro, as described in this document, can optionally be further treated by conventional means. Processing may include cracking to reduce the size and thereby increase the hydrogen: carbon ratio of hydrocarbon molecules. Thermal and catalytic cracking methods are routinely used in the processing of oil of triglycerides and hydrocarbons. Catalytic methods involve the use of a catalyst, such as a solid acid catalyst. The catalyst can be silica-alumina or a zeolite, which results in the heterolytic, or asymmetric, rupture of a carbon-carbon bond to result in a carbocation and a hydride anion. These intermediate reactives then undergo a rearrangement or transfer of hydride with another hydrocarbon. The reactions can thus regenerate the intermediates to result in a chain self-propagating mechanism. Hydrocarbons can also be processed to reduce, optionally to zero, the number of carbon-carbon double or triple bonds in them. Hydrocarbons can also be processed to remove or eliminate a ring or cyclic structure in them. Hydrocarbons can also be processed to increase the hydrogen: carbon ratio. This may include adding hydrogen (hydrogenation) and / or cracking hydrocarbons into smaller hydrocarbons.
Thermal methods involve using high temperature and pressure to reduce the size of hydrocarbons. Can be used at an elevated temperature of around 800 C
50/82 and pressure of about 700 kPa. These conditions generate light, a term that is sometimes used to refer to hydrogen-rich hydrocarbon molecules (as distinguished from photon flux), while also generating, by condensation, heavier hydrocarbon molecules that are relatively devoid of hydrogen . The methodology provides homolytic, or symmetrical, disruption and produces alkenes, which can be optionally saturated enzymatically as described above.
Catalytic and thermal methods are standard in plants for processing hydrocarbons and oil refining. Thus, the hydrocarbons produced by cells, as described in this document, can be collected and processed or refined using conventional means. See, Hillen et al. (Biotechnology and Bioengineering, Vol. XXIV: 193-205 (1982)) for a report on hydrocracking of hydrocarbons produced by microalgae. In alternative embodiments, the fraction is treated with another catalyst, such as an organic compound, heat and / or an inorganic compound. For processing lipids into biodiesel, a transesterification process is used as described in Section IV of this document.
The hydrocarbons produced through the present invention are useful in a variety of industrial applications. For example, the production of linear alkylbenzene sulfonate (LAS), an anionic surfactant used in almost all types of detergents and cleaning preparations, uses hydrocarbons generally comprising a chain of 10-14 carbon atoms. See, for example, Pat, Nos. US 6,946,430, 5,506,201, 6,692,730, 6,268,517, 6,020,509, 6,140,302, 5,080,848 and 5,567,359. Surfactants, such as LAS, can be used in the manufacture of personal care and detergent compositions, such as those described in
51/82
Pat. We. US 5,942,479, 6,086,903, 5,833,999, 6,468,955 and
6,407,044.
Methods for Producing Suitable Fuels for Use in Diesel Vehicles and Jet Engines
Increasing interest is directed to the use of biologically derived hydrocarbon components in fuels, such as biodiesel, renewable diesel and jet fuel, since renewable biological starting materials are available that can replace starting materials derived from fossil fuels, and their use is desirable. There is a need for methods to produce hydrocarbon components from biological materials. The present invention addresses this need by providing methods for producing biodiesel, renewable diesel and jet fuel using the lipids generated by the methods described in this document as a biological material for producing biodiesel, renewable diesel and jet fuel.
Traditional diesel fuels are 20 petroleum distillates rich in paraffinic hydrocarbons.
They have boiling ranges as wide as 370 to 780 F, which are suitable for combustion in a compression ignition engine, such as a diesel engine vehicle. The American Society for Testing and Materials (ASTM) establishes the 25 degree of diesel according to the boiling range, with allowable ranges for other fuel properties, such as cetane number, cloud point, flash point, viscosity, aniline, sulfur content, water content, ash content, corrosion in copper foil and 30 carbon residue. Technically, any hydrocarbon distilled material derived from biomass or otherwise that meets the appropriate ASTM specification can be defined as diesel fuel (ASTM D975), jet fuel
52/82 (ASTM D1655), or as biodiesel (ASTM D6751).
After extraction, the lipid and / or hydrocarbon components recovered from the microbial biomass described in this document can be subjected to chemical treatment to manufacture a fuel for use in diesel vehicles and jet engines.
Biodiesel
Biodiesel is a liquid that varies in color - between golden and dark brown - depending on the raw material of production. It is practically immiscible with water, has a high boiling point and low vapor pressure. Biodiesel refers to a processed fuel equivalent to diesel for use in diesel engine vehicles. Biodiesel is biodegradable and non-toxic. An additional benefit of biodiesel over conventional diesel fuel is less engine wear.
Typically, biodiesel comprises C14-C18 alkyl esters. Various processes convert biomass or a lipid produced and isolated as described in this document into diesel fuels. A preferred method for producing biodiesel is by transesterification of a lipid as described in this document. A preferred alkyl ester for use as biodiesel is a methyl ester or ethyl ester.
Biodiesel produced by a method described in this document can be used alone or mixed with conventional diesel fuel in any concentration in most modern diesel engine vehicles. When mixed with conventional diesel fuel (petroleum diesel), biodiesel can be present from about 0.1% to about 99.9%. Much of the world uses a system known as the B factor to indicate the amount of biodiesel in any fuel mixture. For example, fuel containing 20% biodiesel is labeled B20. O
53/82 pure biodiesel is referred to as B100.
Biodiesel can also be used as a heating fuel in domestic and commercial boilers. Existing oil boilers may contain rubber parts and 5 may require conversion to work with biodiesel. The conversion process is generally relatively simple, involving the exchange of rubber parts for synthetic parts because biodiesel is a strong solvent. Due to its strong solvent power, the burning of biodiesel will increase the efficiency of the boilers.
Biodiesel can be used as an additive in diesel formulations to increase the lubricity of pure Ultra-Low Sulfur Diesel (ULSD) fuel, which is advantageous because it has practically no sulfur content.
Biodiesel is a better solvent than petrodiesel and can be used to break up waste deposits on the fuel lines of vehicles that previously worked on petrodiesel.
Biodiesel Production
Biodiesel can be produced by transesterification of triglycerides contained in oil-rich biomass. Thus, in another aspect of the present invention, a method is provided for producing biodiesel. In a preferred embodiment, the method for producing biodiesel comprises the 25 steps of (a) growing a lipid-containing microorganism using methods disclosed in this document, (b) lysing a lipid-containing microorganism to produce a lysate, (c) isolating the lipids of the lysed microorganism and (d) transesterify the lipid composition, through which the biodiesel is produced.
Methods for culturing a microorganism, lysing a microorganism to produce a lysate, treating the lysate in a medium comprising an organic solvent for
54/82 forming a heterogeneous mixture and separating the treated lysate into a lipid composition have been described above and can also be used in the biodiesel production method.
Lipid compositions can be subjected to transesterification to produce esters of long-chain fatty acids useful as biodiesel. Preferred transesterification reactions are outlined below and include base catalyzed transesterification and transesterification using recombinant lipases.
In a base-catalyzed transesterification process, the triacylglycerides react with an alcohol, such as methanol or ethanol, in the presence of an alkaline catalyst, typically potassium hydroxide. This reaction forms methyl or ethyl esters and glycerin (glycerol) as a by-product.
General Chemical Process
Animal and vegetable oils are typically made from triglycerides which are esters of free fatty acids with trihydric alcohol, glycerol. In transesterification, the glycerol in a triacylglyceride (TAG) is replaced with a short-chain alcohol such as methanol or ethanol.
Using Recombinant Lipases
Transesterification was also performed experimentally, using an enzyme, such as a lipase instead of a base. The lipase-catalyzed transesterification can be carried out, for example, at a temperature between room temperature and 80 ° C and a molar ratio of TAG to alcohol lower than 1: 1, preferably about 3: 1.
Suitable lipases for use in transesterification are found, for example, in U.S. Pat. We. US 4,798,793, 4,940,845, 5,156,963, 5,342,768, 5,776,741 and W089 / 01032.
A challenge in using a lipase for the production of fatty acid esters suitable for biodiesel is that
55/82 the price of lipase is much higher than the price of sodium hydroxide (NaOH) used by the strong base process. This challenge was addressed using an immobilized lipase, which can be recycled. However, the activity of immobilized lipase 5 must be maintained after being recycled for a minimum number of cycles to allow a lipase-based process to compete with the strong base process in terms of production cost. The immobilized lipases are subject to poisoning by the lower alcohols typically used in transesterification. U.S. Pat. No. 6,398,707 (issued June 4, 2002 to Wu et al.) Describes methods for enhancing the activity of immobilized lipases and regenerating immobilized lipases that have reduced activity.
In particular embodiments, a recombinant lipase 15 is expressed in the same microorganisms that produce the lipid on which the lipase acts. The DNA encoding the lipase and the selectable marker is preferably codon-optimized cDNA. Methods for recoding genes for expression in microalgae are described in U.S. Pat. No. US. 20 7,135,290.
Standards
The common international standard for biodiesel is EN 14214. ASTM D6751 is the most common standard for biodiesel referenced in the United States and Canada. Germany uses 25 DIN EN 14214 and the United Kingdom requires compliance with BS EN 14214.
Basic industrial tests to determine whether products comply with these standards typically include gas chromatography, HPLC and others. Biodiesel that meets the biodiesel quality standards is very non-toxic, with a toxicity rating (LD ₅₀ ) greater than 50 mL / kg.
Renewable Diesel
56/82 renewable diesel comprises alkanes, such as C16: 0 and C18: 0 and thus, are distinguishable from biodiesel. High quality renewable diesel complies with the ASTM D975 standard.
The lipids produced by the methods of the present invention can serve as a raw material to produce renewable diesel. Thus, in another aspect of the present invention, a method for producing renewable diesel is provided. Renewable diesel can be produced by at least three processes: 10 hydrothermal processing (hydrotreating);
hydroprocessing; and indirect liquefaction. These processes produce non-ester distillates. During these processes, the triacylglycerides produced and isolated as described in this document, are converted to alkanes.
In a preferred embodiment, the method for producing renewable diesel comprises (a) growing a lipid-containing microorganism using methods disclosed in this document, (b) lysing the microorganism to produce a lysate, (c) isolating the lipids from the micro- lysed organism and (d) deoxygenate and hydrate the lipids to produce an alkane, through which renewable diesel is produced. Lipids suitable for the manufacture of renewable diesel can be obtained through the extraction of microbial biomass, using an organic solvent such as hexane, or through 25 other methods, such as those described in Pat. No. 5,928,696.
In some methods, the microbial lipid is first cracked with hydrotreatment to reduce the length of the carbon chain and saturate the double bonds, 30 respectively. The material is then isomerized, also with hydrotreating. The naphtha fraction can then be removed by distillation, followed by additional distillation to vaporize and distill the desired components
57/82 on diesel fuel to meet a D975 standard, while leaving components that are heavier than desired to meet D 975 standard. The methods of hydrotreating, hydrocracking, deoxygenation and isomerization of chemical modification of oils, including oils triglycerides, are well known in the art. See, for example, European patent applications EP1741768 (Al), EP1741767 (Al), EP1682466 (Al), EP1640437 (Al), EP1681337 (Al), EP1795576 (Al), and Pat. We. US 7,238,277, 6,630,066; 6,596,155, 6,977,322, 7,041,866, 6,217,746, 5,885,440, 6,881,873.
Hydrotreatment
In a preferred embodiment of the method for producing renewable diesel, the treatment of the lipids to produce an alkane is carried out by hydrotreating the lipid composition. In hydrothermal processing, biomass typically reacts in water at a high temperature and pressure to form residual oils and solids. Conversion temperatures are typically 300 to 660 F, with sufficient pressure to maintain water primarily as a liquid, from 100 to 170 standard atmospheres (atm). Reaction times are in the order of 15 to 30 minutes. After the reaction is complete, the organic part is separated from the water. Thus, a suitable distillate for diesel is produced.
Hydroprocessing
A renewable diesel, referred to as green diesel, can be produced from fatty acids by traditional hydroprocessing technology. Oils containing triglycerides can be hydro-processed as co-supplies with oil or as a dedicated supply. The product is a diesel fuel that complies with the ASTM D975 specification. Thus, in another preferred embodiment of the method for producing renewable diesel, the treatment of
58/82 lipid composition to produce an alkane is carried out by hydroprocessing the lipid composition.
In some methods for making renewable diesel, the first step in the treatment of a triglyceride is hydroprocessing to saturate double bonds, followed by deoxygenation at elevated temperature in the presence of hydrogen and a catalyst. In some methods, hydrogenation and deoxygenation occur in the same reaction. In other methods, deoxygenation occurs before hydrogenation. The isomerization is then optionally carried out, also in the presence of hydrogen and a catalyst. Naphtha components are preferably removed by distillation. For examples, see, Pat. We. US 5,475,160 (triglyceride hydrogenation), 5,091,116 (deoxygenation, hydrogenation and gas removal), 6,391,815 (hydrogenation) and 5,888,947 (isomerization).
Oil refineries use hydroprocessing to remove impurities by treating supplies with hydrogen. Hydroprocessing conversion temperatures are typically 300 to 700 F. Pressures are typically 40 to 100 atm. Reaction times are typically in the range of 10 to 60 minutes.
Solid catalysts are used to increase certain reaction rates, improve selectivity for certain products and improve hydrogen consumption.
hydrotreating and hydroprocessing ultimately lead to a reduction in the molecular weight of supplies. In the case of oils containing triglycerides, the triglyceride molecule is reduced to four hydrocarbon molecules under hydroprocessing conditions: one propane molecule and three heavier hydrocarbon molecules, typically in the range of C8 to C18.
Indirect Liquefaction
59/82
A traditional ultra-low sulfur diesel can be produced from any form of biomass by a two-step process. First, the biomass is converted into a synthesis gas, a gas mixture rich in hydrogen and carbon monoxide. Then, the synthesis gas is catalytically converted into liquids. Typically, liquid production is performed using Fischer-Tropsch (FT) synthesis. This technology applies to coal, natural gas and heavy oils. Thus, in addition to another preferred embodiment of the method for producing renewable diesel, the treatment of the lipid composition to produce an alkane is carried out by indirect liquefaction of the lipid composition.
Jet fuel Aircraft fuel is of course straw-colored. The most common fuel is a paraffin-based / lead-free fuel classified as A-l Aircraft, which is produced by a set of internationally standardized specifications. Aircraft fuel is a mixture of a large number of different hydrocarbons, possibly as many as a thousand or more. The range of their sizes (molecular weights or carbon numbers) is restricted by product requirements, for example, freezing point or smoke point. Kerosene-type aircraft fuel (including Jet A and Jet A-l) has a carbon number distribution between about 8 and 16 carbon numbers. Wide-cut naphtha or wide-cut aircraft fuel (including Jet B) typically has a carbon number distribution between about 5 and 15 carbons.
Both Aircraft (Jet A and Jet B) can contain several additives. Useful additives include, but are not limited to, antioxidants, antistatic agents, corrosion inhibitors
60/82 and fuel freeze inhibiting agents (FSII). Antioxidants prevent gumming and are generally based on alkylated phenols, for example, AO30, AO-31, or AO-37. Antistatic agents dissipate static electricity and prevent sparks. Stadis 450 with dinonylnaphthylsulfonic acid (DINNSA) as an active ingredient is an example. Corrosion inhibitors, for example, DCI-4A are used for civil and military fuels and DCI-6A is used for military fuels. FSII agents include, for example, Di-EGME.
One solution is to mix algae fuels with the existing jet fuel. The present invention provides such a solution. The lipids produced by the methods of the present invention can serve as a raw material for producing jet fuel. Thus, in another aspect of the present invention, a method is provided for producing jet fuel. In this way, two methods for producing jet fuel from lipids produced by the methods of the present invention are provided: fluid catalytic cracking (CCF); and hydrodesoxygenation (HDO).
Fluid Catalytic Cracking
Fluid Catalytic Cracking (CCF) is a method that is used to produce olefins, especially propylene from heavy crude fractions. There are reports in the literature that vegetable oils such as canola oil could be processed using CCF to give a hydrocarbon stream useful as a gasoline fuel.
The lipids produced by the method of the present invention can be converted to olefins. The process involves the flow of lipids produced through a CCF zone and the collection of a product stream composed of olefins, which is useful as a jet fuel. The lipids produced come into contact with a catalyst of
61/82 cracking under cracking conditions to provide a product stream comprising olefins and hydrocarbons useful as jet fuels.
In a preferred embodiment, the method for producing jet fuel comprises (a) cultivating a lipid-containing microorganism using methods disclosed herein, (b) lysing the lipid-containing microorganism to produce a lysate, (c) isolating the lipids from the lysate and (d) treating the lipid composition, by means of which jet fuel is produced.
In a preferred embodiment of the method for producing a jet fuel, the lipid composition can flow through a fluid catalytic cracking zone, which, in one embodiment, may comprise contacting the lipid composition with a cracking catalyst under conditions of cracking to provide a product stream comprising C ₂ -C ₅ olefins.
In certain embodiments of this method, it may be desirable to remove any contaminants that may be present in the lipid composition. Thus, before the lipid composition flows through a fluid catalytic cracking zone, the lipid composition is pre-treated. Pretreatment may involve contacting the lipid composition with an ion exchange resin. The ion exchange resin is an acidic ion exchange resin, like Amberlyst ™ 15 and can be used as a bed in a reactor through which the lipid composition flows, in an upward or downward flow. Other pretreatments may include mild acid washes, bringing the lipid composition into contact with an acid, such as sulfuric, acetic, nitric, or hydrochloric acid. The contact is made with an acid solution diluted generally at room temperature and atmospheric pressure.
62/82
The lipid composition, optionally pretreated, flows to a CCF zone where the hydrocarbon components are cracked into olefins. Catalytic cracking is achieved by contacting the lipid composition in a reaction zone with a catalyst composed of finely divided particulate material. The reaction is catalytic cracking, as opposed to hydrocracking, and is carried out in the absence of added hydrogen or hydrogen consumption. As the cracking reaction proceeds, considerable amounts of coke are deposited on the catalyst. The catalyst is regenerated at high temperatures by burning coke in the catalyst in a regeneration zone. The coke-containing catalyst, referred to herein as a coke-forming catalyst, is continuously transported from the reaction zone to the regeneration zone to be regenerated and replaced by regenerated catalyst with essentially no coke from the regeneration zone. The fluidization of the catalyst particles by various gas streams allows the transport of catalyst between the reaction zone and the regeneration zone. Methods for cracking hydrocarbons, such as those of the lipid composition described in this document, in a fluidized stream of the catalyst, transporting the catalyst between the reaction and regeneration zones, and the combustion coke in the regenerator are well known to those skilled in the art of process. CCF. Examples of applications of TLC and catalysts useful for cracking the lipid composition to produce C ₂ -C ₅ olefins are described in Pat. We. US 6,538,169, 7,288,685, which are incorporated in their entirety by reference.
In one embodiment, the cracking of the lipid composition of the present invention occurs in the riser section or, alternatively, the elevation section, of the CCF zone. The lipid composition is introduced into the riser by a mouthpiece,
63/82 resulting in rapid vaporization of the lipid composition. Before coming into contact with the catalyst, the lipid composition will ordinarily have a temperature of about 149 C to about 316 C (300 F to 600 F). The catalyst flows from a mixing vessel to the riser where it comes in contact with the lipid composition for a time of about 2 seconds or less.
The vapors from the mixed catalyst and the reacted lipid composition are then discharged from the top of the riser through an outlet and separated into a stream of cracked product vapor including olefins and a collection of catalyst particles covered with considerable amounts of coke and generally referred to as a coke-forming catalyst. In an effort to minimize the contact time of the lipid composition and the catalyst, which can promote additional conversion of desired products into other undesirable products, any arrangement of separators such as a spiral arm arrangement can be used to remove the formed catalyst the product chain quickly. The separator, for example, spiral arm separator, is located in an upper part of a chamber with an extraction zone located in the lower part of the chamber. The catalyst separated by the spiral arm arrangement descends into the extraction zone. The cracked product vapor stream comprising cracked hydrocarbons including light olefins and some catalysts leaves the chamber through a conduit that communicates with cyclones. Cyclones remove the remaining catalyst particles from the product vapor stream to reduce particle concentrations to very low levels. The product vapor stream then exits the top of the separation vessel. The catalyst separated by the cyclones returns to the separation vessel and, in
64/82 then to the extraction zone. The extraction zone removes the hydrocarbons adsorbed to the catalyst surface by counter-current contact with the steam.
The low partial pressure of hydrocarbons operates to favor the production of light olefins. Consequently, the riser pressure is fixed at about 172 to 241 kPa (25 to 35 psia) with a partial hydrocarbon pressure of about 35 to 172 kPa (5 to 25 psia), with a preferred hydrocarbon partial pressure of about from 69 to 138 kPa (10 to 20 psia). This relatively low partial pressure of hydrocarbons is achieved using steam as a diluent in that the diluent is 10 to 55% by weight of the lipid composition and preferably about 15% by weight of the lipid composition. Other diluents, such as dry gas, can be used to achieve partial pressures of equivalent hydrocarbons.
The current temperature cracked at the riser outlet will be about 510 C to 621 C (950 F to 1150 F). However, riser outlet temperatures above 566 C (1050 F) make more dry gas and more olefins. While riser outlet temperatures below 566 C (1050 F) make less ethylene and propylene. Consequently, it is preferable to perform the TLC process at a preferred temperature of about 566 ° C to about 630 ° C, preferred pressure of about 138 kPa to about 240 kPa (20 to 35 psia). Another condition for the process is the ratio of catalyst to lipid composition which can vary from about 5 to about 20 and preferably from about 10 to about 15.
In one embodiment of the method for producing a jet fuel, the lipid composition is introduced into the elevation section of a CCF reactor. The temperature in the elevation section will be very hot and will range from about 700 C (1292 F) to about 760 C (1400 F) with a
65/82 catalyst on lipid composition from about 100 to about 150. It is anticipated that the introduction of the lipid composition in the lifting section will produce considerable amounts of propylene and ethylene.
The gaseous and liquid hydrocarbon products produced can be analyzed by gas chromatography, HPLC, etc.
Hydrodesoxygenation
In another embodiment of the method for producing a jet fuel using the lipid composition or the lipids produced as described in this document, the structure of the lipid composition or the lipids is broken down by a process referred to as hydrodeoxygenation (HDO).
HDO, means the removal of oxygen by means of hydrogen, that is, oxygen is removed at the same time that the material structure is broken. The olefinic double bonds are hydrogenated and any sulfur and nitrogen compounds are removed. Sulfur removal is called hydrodesulfurization (HDS). The pre-treatment and the purity of the raw materials (lipid composition or lipids) contribute to the useful life of the catalyst.
Generally in the HDO / HDS stage, hydrogen is mixed with the raw material (lipid composition or lipids), and then the mixture passes through a catalyst bed as a co-current flow, as a single raw material. phase or two phase. After the HDO / MDS step, the product fraction is separated and transferred to a separate isomerization reactor. An isomerization reactor for biological starting material is described in the literature (FI 100 248) as a co-current reactor.
The process for producing a fuel by hydrogenation of a hydrocarbon supply, for example, the lipid composition or the lipids in this
66/82 document, can also be carried out by passing the lipid composition or the lipids as a co-current flow with hydrogen gas through a first hydrogenation zone and, subsequently, the hydrocarbon effluent is additionally hydrogenated in a second hydrogenation zone , passing hydrogen gas to the second hydrogenation zone as a counter-current flow in relation to the hydrocarbon effluent. Examples of applications of HDO and catalysts useful for cracking the lipid composition to produce C ₂ -C ₅ olefins are described in U.S. Pat. US No. 7,232,935, which is incorporated in its entirety by reference.
Typically, in the hydrodeoxygenation step, the structure of the biological component, such as the lipid composition or lipids in this document, is decomposed, compounds of oxygen, nitrogen, phosphorus and sulfur, and light hydrocarbons such as gas are removed, and the olefinic bonds are removed. hydrogenated. In the second stage of the process, that is, in the so-called isomerization stage, isomerization is performed to branch the hydrocarbon chain and improve the performance of paraffin at low temperatures.
In the first stage, that is, the HDO stage of the cracking process, the hydrogen gas and the lipid composition or lipids in this document, which are to be hydrogenated, pass to an HDO catalyst bed system as co-current or countercurrent, said catalyst bed system comprising one or more catalyst beds, preferably 1-3 catalyst beds. The HDO stage is typically operated in a co-current manner. In the case of an HDO catalyst bed system comprising two or more catalyst beds, one or more of the beds can be operated using the counter-current flow principle.
In the HDO stage, the pressure varies between 20 and 150
67/82 bar, preferably between 50 and 100 bar, and the temperature varies between 200 and 500 C, preferably in the range of 300400 C.
In the HDO stage, known hydrogenation catalysts containing Group VII and / or VIB metals from the Periodic System can be used. Preferably, the hydrogenation catalysts are supported Pd, Pt, Ni, NiMo or CoMO catalysts, the support being alumina and / or silica. Typically, NiMo / Al ₂ 0 ₃ and CoMo / A1 ₂ 0 ₃ catalysts are used.
Before the HDO step, the lipid composition or lipids in this document can optionally be treated by pre-hydrogenation under mild conditions, thus avoiding side reactions of the double bonds. Such pre-hydrogenation is carried out in the presence of a pre-hydrogenation catalyst at temperatures of 50 400 C and at hydrogen pressures of 1,200 bar, preferably at a temperature between 150 and 250 C and a hydrogen pressure between 10 and 100 bar. The catalyst may contain metals from Group VIII and / or VIB from the Periodic System. Preferably, the pre-hydrogenation catalyst is a supported Pd, Pt, Ni, NiMo or CoMO catalyst, the support being alumina and / or silica.
A gas stream from the hydrogen containing HDO stage is cooled and then carbon monoxide, carbon dioxide, nitrogen, phosphorus and sulfur compounds, light gas hydrocarbons and other impurities are removed from it. After compression, the purified hydrogen or recycled hydrogen returns to the first catalyst bed and / or between the catalyst beds to compensate for the removed gas stream. The water is removed from the condensed liquid. The liquid passes to the first catalyst bed or between the catalyst beds.
After the HDO stage, the product is subjected to an isomerization stage. It is important for the process that
68/82 impurities are removed as completely as possible before the hydrocarbons come into contact with the isomerization catalyst. The isomerization step comprises an optional extraction step, in which the reaction product of the HDO step can be purified by extraction with water vapor or a suitable gas such as light hydrocarbons, nitrogen or hydrogen. The optional extraction step is carried out counter-current in a unit upstream of the isomerization catalyst, where the gas and liquid come into contact with each other, or before the actual isomerization reactor in a separate extraction unit that uses the counter-current principle.
After the extraction step, the hydrogen gas and the hydrogenated lipid composition or the lipids in this document and, optionally, a mixture of n-paraffin, are transferred to a reactive isomerization unit comprising one or more catalyst beds. The catalyst beds of the stage
isomerization operate in mode in co-current or counter-current. Is important for O process what the beginning in counter-current flow be applied in step in
isomerization. In the isomerization step, this is done by performing the optional extraction step or the isomerization reaction step, or both in counter-current mode.
The isomerization step and the HDO step can be carried out in the same pressure vessel or in separate pressure vessels. The optional pre-hydrogenation can be carried out in a separate pressure vessel or in the same pressure vessel as the HDO and isomerization steps.
In the isomerization step, the pressure varies in the range of 20 150 bar, preferably in the range of 20 100 bar, the temperature being between 200 and 500 C, preferably between 300 and 400 C.
69/82
In the isomerization step, isomerization catalysts known in the art can be used. Suitable isomerization catalysts contain molecular sieves and / or a Group VII metal and / or a vehicle. Preferably, the isomerization catalyst contains SAPO-11 or SAPO41 or ZSM-22 or ZSM-23 or ferrierite and Pt, Pd or NI and A1 ₂ O ₃ or SiO ₂ . Typical isomerization catalysts are, for example, Pt / SAPO-ll / Al ₂ O ₃ , Pt / ZSM-22 / Al ₂ O ₃ , Pt / ZSM-23 / Al ₂ O ₃ and Pt / SAPO-ll / SÍO ₂ .
As the product, a high quality hydrocarbon component of biological origin, useful as a diesel fuel or its component, is obtained, the density, cetane number and the low temperate performance of said hydrocarbon component being excellent.
Microbe Engineering
As mentioned above, in certain embodiments of the present invention it is desirable to genetically modify a microorganism to enhance lipid production, modify the properties or proportions of components generated by the microorganism, or to improve or provide growth characteristics again in a variety of materials from raw materials.
Promoters, cDNAs and 3'UTRs, as well as other elements of the vectors, can be generated through cloning techniques that use isolated fragments from native sources (see, for example, Molecular Cloning: A Laboratory Manual, Sambrook et al. (3d edition , 2001, Cold Spring Harbor Press; and U.S. Pat. No. 4,683,202. Alternatively, elements can be generated synthetically using known methods (see, for example, Gene. 1995 Oct. 16; 164 (1): 49 -53) Microbial engineering methods are generally known in the art, for example, U.S. Patent No. 20090011480, incorporated herein by reference in its entirety, for all
70/82 purposes.
EXAMPLES
Below are examples of specific embodiments for carrying out the present invention. The examples are offered for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Efforts have been made to ensure accuracy with respect to the numbers used (eg quantities, temperatures, etc.), but some error and experimental deviation, of course, are allowed.
The practice of the present invention will employ, unless otherwise indicated, conventional methods of protein chemistry, biochemistry, recombinant DNA techniques and pharmacology, within the skill of the art. Such techniques are fully explained in the literature. See, for example, TE Creighton, Proteins: Structures and Molecular Properties (WH Freeman and Company, 1993); AL Lehninger, Biochemistry (Worth Publishers, Inc., current addition); Sambrook, et al. , Molecular Cloning: A Laboratory Manual (2nd Edition, 1989); Methods In Enzymology (S. Colowick and N. Kaplan eds., Academic Press, Inc.); Remington's Pharmaceutical Sciences, 18th Edition (Easton, Pennsylvania: Mack Publishing Company, 1990); Carey and Sundberg Advanced Organic Chemistry 3 ^to Ed. (Plenum Press) Vols A and B (1992).
Example 1: Increase in biomass by applying low intensity lighting to microalgae fermentation.
Botryococcus naturally synthesizes and tolerates hydrocarbon mixtures and produces as much as 85% of hydrocarbons by weight and in many cases the main hydrocarbon is botryococene. He is also known to be a mandatory photoautotroph, but appears to have the ability to absorb glucose (Reference: Biosynthesis of the triterpenoids, botryococcenes and tetramethylsqualene in the
71/82
B race of Botryococcus braunii via the non-mevalonate pathway Sato et al. 2003. Tetrahedron Letter 44: 7035-7037).
Botryococcus culture is grown in BG11 media (Reference: Autotrophic cultivation of Botryococcus braunii for the production of hydrocarbons and exopolysaccharides in various media. Dayananda et al. 2007. Biomass and Bioenergy. 31: 87-93) at 25-35 AD in a bioreactor with 10-30% dissolved oxygen. The effects of the light signal on the heterotrophic growth of Botryococcus are tested, comparing the dry cell weight of cultures of different conditions (dark + without glucose, dark + glucose, light + without glucose and light + glucose). The ideal light intensity (0.01-300 pmols of photons m ' ² s-1) and the different light spectrum (360-700 nm), as well as different light periods (9-16 h) are tested. The combination of low light irradiance and glucose results in a) a higher growth rate, b) an increase in products, such as carotenoids, lipids and botriococenes.
Example 2: Light regulation of the isoprenoid pathway.
Isopropene, monoterpenes and sesquiterpenes are synthesized and emitted by some species of plants and microalgae, but not all species have this capacity. These volatile, non-essential isoprenoid compounds share the same biochemical precursors as the larger commercially useful isoprenoids such as carotenoids and hydrocarbons. Two separate pathways operate on plant cells to synthesize prenyl diphosphate precursors common to all isoprenoids.
Cytosolic and mitochondrial precursors are produced via the mevalonate (MVA) pathway, while the recently discovered metileritritol phosphate (MEP) pathway is located in plastids. Botryococcus braunii produces hydrocarbons via the MEP, not mevalonic (Figure 2).
Light is the most important environmental factor for
72/82 MEP track regulation. The 1-deoxy-d-xylulose 5-phosphate redutoisomerase (DXR) is the rate limiting step, and the expression of the gene encoding DXR is regulated by light (Reference: Expression and molecular analysis of the Arabidopsis DXR gene encoding 1-deoxy -d-xylulose 5-phosphate reductoisomerase, the first committed enzyme of the 2-cmethyl-d-erythritol 4-phosphate pathway. Carretero-Paulet et al. Plant Physiology. 2002. 129: 1581-1591).
Another example is the blue light activation of genes encoding carotenoid biosynthesis enzymes in Chlamydomonas reinhardtii, a single-celled green alga. Microarray and quantitative PCR experiments showed that genes encoding carotenoid biosynthesis enzymes such as PDS, HDS, PSY and ZDS are activated by very low irradiance of white light (0.01 pmol of photons m ² s' ¹ ) and light blue. Other evidence suggested that phototropin, a blue light receptor, is involved in the expression of genes activated by blue light for carotenoid biosynthesis (Reference: Phototropin involvement in the expression of genes encoding chlorophyll and carotenoid biosynthesis enzymes and LHC apoproteins in Chlamydomonas reinhardtii Im et al. The Plant Journal 2006. 48: 1-16).
An example is the increase in the production of Botryococcus hydrocarbons. Various intensities of light (0.01-300 pmols of photons m ' ² s' ¹ ) and different light spectrum (360-700 nm) are applied to a Botryococcus culture, and the number of different hydrocarbon species is measured by CG-EM.
Example 3. Growth of Neochloris oleabundans in different light conditions
Materials and methods
Microalgae and cultivation condition
The UTEX 1185 strain of Neochloris oleabundans was
73/82 obtained from the algae culture collection at the University of Texas (Austin, TX, USA). The initial culture of the microalgae was grown in a 250 mL Erlenmeyer flask containing 120 mL of 3 N bold medium modified with 2% glucose at 25 ° C at room temperature with aluminum foil loosely covering the flask on an orbital shaker at 130 rpm under the alternation of two 40W aquarium fluorescent light bulbs and plants (392282, Philips) and two 40W natural sunlight (3 92316, Philips). The culture medium (modified MB3N) contained the following components per 1 L of deionized water: 0.75 g NaNO ₃ , 0.075 g K ₂ HPO ₄ , 0.074 g MgSO ₄ 7H ₂ O, 0.025 g CaCl ₂ 2H ₂ O, g 0.176 g of KH ₂ PO ₄ 0.025 g of NaCl, 6 ml of P-metal IV solution (0.75 g of Na ₂ EDTA 2H ₂ O, 0.097 g of FeCl ₃ 6H ₂ O, 0.041 g of MnCl ₂ 4H ₂ O, 0.005 g of ZnCl ₂ , 0.002 g of CoCl ₂ 6H ₂ O, 0.004 g of Na ₂ Mo04 2H ₂ O in 1L of water dl), 1 mL of each three vitamins (0.1 mM of vitamin B12, 0.1 mM biotin, 6.5 mM thiamine dissolved separately in 50 mM HEPES pH 7.8). The final pH of the medium was adjusted to 7.5 with 20% KOH before autoclaving the medium. Vitamin solutions were added to cool the autoclaved medium. Once the initial culture reached a certain confluence, its concentration was measured using the optical density (DO) at 680nm and 750nm using the Genesys 10 UV spectrophotometer (Thermo Scientific).
Experimental procedure and growth measurement Three different wavelengths of light (white, blue and red) were tested. LED lights were purchased from Super Bright LEDs, Inc. (white: RL5W3030, blue: RL5-B2430, red: RL5-R1330). For each wavelength of light, four different conditions were established in duplicate as follows:
1-2. MB3N modified + glucose-free + dark
74/82
3-4. MB3N modified + without glucose + half-light
5-6. Modified MB3N + 2% glucose + dark
7-8. Modified MB3N + 2% glucose + half light
A total of eight 250 ml Erlenmeyer flasks containing a final 120 ml cell culture volume were prepared with an initial cell concentration of OD 0.1 at 750 nm (~ 1.1 x 10 ^G cells / ml) for each condition. The light intensity was fixed at 3-4 pmol / m ² s' ¹ photon for white, 2-3 pmol / m ² s' ¹ photon for blue and 1-2 pmol / m ² s' ¹ photon for red. The speed of the orbital shaker was set at 135 rpm. The experiment was carried out at room temperature for two weeks. One milliliter of cell culture was obtained from each flask every 24 h to assess cell concentrations by measuring OD at 68 nm and 750 nm using the Thermo Fisher Scientific Genesys 10 UV spectrophotometer (Waltham, MA, USA). The specific growth rate was determined by plotting the logarithm of the optical density of the culture against time (Figure 3). The combination of low irradiance of red, white or blue light and glucose resulted in a higher growth rate compared to controls.
Example 4. Growth of Botryococcus sudeticus in different light conditions
Materials and methods
Strains and media
The UTEX 2629 strain of Botryococcus sudeticus was obtained from the algae culture collection at the University of Texas (Austin, TX, USA). The stock culture was grown in 250 ml Erlenmeyer flasks containing 120 ml of BG11 medium modified with 2% glucose at 25 ° C at room temperature with half-light (4-5 pmol / m ² s' ¹ photons) in an orbital shaker at 130 rpm. The half-light illumination consists of two different bulbs, light bulbs
75/82 40W plant and aquarium fluorescent (392282 from Philips) and 40W natural sunlight (3 92316 from Philips). One liter of culture medium (modified BG-11) contained: 10 mM HEPES (pH 7.8), 1.5 g NaNO ₃ , 0.04 g K ₂ HPO ₄ , 0.06 g MgSO ₄
7H ₂ 0, 0.036 g CaCl ₂ 2H ₂ O, 0.006 g citric acid H ₂ O, 0.0138 g ferric ammonium citrate, 0.001 g Na ₂ EDTA 2H ₂ O, 0.02 g Na ₂ CO ₃ , 2.86 mg of H ₃ BO ₃ , 1.81 mg of MnCl ₂
4H ₂ O, 0.22 mg ZnSO ₄ 7H ₂ O, 0.39 mg Na ₂ Mo0 ₄ 2H ₂ O, 0.079 mg CuSO ₄ 5H ₂ O, 0.04 94 mg Co (N0 ₃ ) ₂ 6H ₂ O, 0.5 g of casein hydrolyzate and 1 ml of each of the three vitamins (0.1 mM vitamin B12, 0.1 mM biotin, 6.5 mM thiamine dissolved separately in 50 mM HEPES pH 7.8). The final pH of the medium was adjusted to 7.8 with 20% KOH.
Experimental procedure and growth measurement
Three different wavelengths of light (white, blue and red) were tested. LED lights were purchased from Super Bright LEDs, Inc. (white: RL5W3030, blue: RL5-B2430, red: RL5-R1330). For each wavelength of light, four different conditions were established in duplicate as follows:
1-2. BG-11 modified + without glucose + dark 3-4. BG-11 modified + without glucose + half-light 5-6. BG-11 modified + 2% glucose + dark 7-8. BG-11 modified + 2% glucose + half light
A total of eight 250 ml Erlenmeyer flasks containing a final 120 ml cell culture volume were prepared with an initial cell concentration of OD 0.1 at 750 nm (~ 1, lx 10 ⁶ cells / ml) for each condition. The light intensity was fixed at 3-4 pmol / m ² s ' ¹ photon for white, 2-3 pmol / m ² s' ¹ photon for blue and 1-2 pmol / m ² s ¹ photon for red. The speed of the orbital shaker was set at 135 rpm. The experiment was carried out at room temperature for two weeks. One milliliter of cell cultures was
76/82 obtained from each flask every day to assess cell concentrations by measuring OD at 680 nm and 750 nm using the Thermo Fisher Scientific Genesys 10 UV spectrophotometer (Waltham, MA, USA). The specific growth rate was determined by plotting the log density of the optical density of the culture against time (Figure 4). The combination of low irradiance of red, white or blue light and glucose resulted in a higher growth rate compared to controls.
Example 5: Botryococcus brauniií Fermentation with controlled lighting
Materials and methods
Strains and media
The UTEX 2441 strain of Botryococcus braunii was obtained from the algae culture collection at the University of Texas (Austin, TX, USA). The stock culture was grown in 250 ml Erlenmeyer flasks containing 120 ml of BG11 medium modified with 2% glucose at 25 ° C at room temperature with half-light (4-5 pmol / m ² s' ¹ photons) in an orbital shaker at 130 rpm. The half-light illumination consisted of two different bulbs, 40W aquarium and plant fluorescent light bulbs (Philips 392282) and 40W natural sunlight (Philips 392316). One liter of culture medium (modified BG-11) contained: 10 mM HEPES (pH 7.8), 1.5 g NaNO ₃ , 0.04 g K ₂ HPO ₄ , 0.06 g MgSO ₄ 7H ₂ O, 0.036 g CaCl ₂ 2H ₂ O, 0.006 g citric acid H ₂ O, 0.0138 g ferric ammonium citrate, 0.001 g Na ₂ EDTA 2H ₂ O, 0.02 g Na ₂ CO ₃ , 2.86 mg of H ₃ BO ₃ , 1.81 mg of MnCl ₂ 4H ₂ O, 0.22 mg of ZnSO ₄ 7H ₂ O, 0.39 mg of Na ₂ Mo0 ₄ 2H ₂ O, 0.079 mg of CuSO ₄ 5H ₂ O, 0.04 94 mg of Co (NO ₃ ) ₂ 6H ₂ O, 0.5 g of casein hydrolyzate and 1 ml of each of the three vitamins (0.1 mM vitamin B12, 0, 1 mM biotin, 6.5 mM thiamine dissolved separately in 50 mM HEPES pH 7.8). The final pH of the medium was adjusted to 7.8
77/82 with 20% KOH.
Experimental procedure and growth measurement
Three different wavelengths of lights (white, blue and red) were tested. LED lights were purchased from Super Bright LEDs, Inc. (white: RL5W3030, blue: RL5-B2430, red: RL5-R1330). For each wavelength of light, four different conditions were
established in duplicate as follows: 1-2 BG-11 modified + without glucose + dark 3-4 BG-11 modified + without glucose + half-light 5-6 BG-11 modified + 2% glucose + dark 7-8 BG-11 modified + 2% glucose + half light
A total of eight 250 ml Erlenmeyer flasks containing a final 120 ml cell culture volume were prepared with an initial cell concentration of OD 0.1 at 750 nm (~ 1, lx 10 ⁶ cells / ml) for each condition. The light intensity was fixed at 3-4 pmol / m ² s' ¹ photon for white, 2-3 pmol / m ² s' ¹ photon for blue and 1-2 pmol / n ^ s' ¹ photon for red. The speed of the orbital shaker was set at 150 rpm. The experiment was carried out at room temperature for two weeks. Five milliliters of each cell culture were obtained from each flask every two days to assess cell growth by dry cell weight (PSC). The specific growth rate was determined by plotting the culture's PSC logarithm against time (Figure 5).
Fluorescence measurement of neutral lipids using Nile Red
In 1 ml of algae suspension, 4 µl of Nile Red solution in acetone (250 µg / ml) was added. The mixture was vortexed 2 times during a 10 minute incubation at room temperature. After incubation, 200 µL of stained algae samples were transferred to individual wells in a 96-well plate. Fluorescence was
78/82 measured on a Molecular Devices 96-well plate spectrofluorometer with an excitation wavelength of 490 nm and an emission wavelength of 585 nm with a 530 emission cut-off filter. In order to determine the relative fluorescence intensity of the algae samples, the white (Nile Red
alone in middle) was subtracted from the intensity in fluorescence. Results Light red + glucose increased the rate in growth of UTEX 2441 in 3 5% compared to culture
heterotrophic in the dark (Dark + gly) (Figure 5). Lipid levels also increased by 52% in red light conditions compared to controls (Figure 6).
Example 6: Chlamydomonas reinhardtiit Fermentation with controlled lighting
Materials and methods
Strains and media
The UTEX 2243 strain of Chlamydomonas reinhardtii was obtained from the algae culture collection at the University of Texas (Austin, TX, USA). The stock cultures were grown separately in 250 mL Erlenmeyer flasks containing 120 mL of TAP medium at 25 ° C at room temperature with half-light (4-5 pmol / m ² s U photons in an orbital shaker at 130 rpm The half-light lighting consisted of two different bulbs (40W aquarium and plant fluorescent light bulbs (Philips 392282) and 40W natural sunlight (Philips 392316)). One liter of culture medium (TAP ) contained: 2.42 g of Tris, 25 ml of TAP salts solution (15 g of NH4C1, 4 g of MgSO ₄ 7H ₂ O, 2g of CaCl ₂ 2H ₂ O), 0.375 ml of phosphate solution (28 , 8 g of K ₂ HPO ₄ , 14.4 g KH2PO4 in 100 ml of water), 1 ml of Hutner's trace element solution (1 L of trace metal solution contains 50 g of EDTA disodium salt, 22 g of ZnSO ₄ 7H ₂ O, 11.4 g H ₃ BO ₄ , 5.06 g MnCl ₂
79/82
4H ₂ O, 1.61 g of CoCl ₂ 6H ₂ O, 1.57 g of CuSO ₄ 5H ₂ O, 1.10 (NH ₄ ) ₆ Mo ₇ 0 ₂₄ 4H ₂ O, 4.99 g of FeSO ₄ 7H ₂ O with pH 7.0 using KOH or HCl) and 1 mL of glacial acetic acid. The final pH of the medium is 7.0 adjusted with glacial acetic acid. Minimum Tris medium (TP) was made with all the components listed above, with the exception of acetic acid. The pH of the medium was adjusted to 7.0 with HCl.
Experimental procedure and growth measurement
LED lights were purchased from Super Bright LEDs, Inc. (RL5-W3030). Four different conditions were established in duplicate as follows:
1-2. TP (without acetic acid) + dark
3-4. TP (without acetic acid) + half-light
5-6. TAP (without acetic acid) + half light
7-8. TAP (without acetic acid) + half light
A total of eight 250 ml Erlenmeyer flasks containing a final 120 ml cell culture volume were prepared with an initial cell concentration of 1.0 x 10 ⁵ cells / ml for each condition. The light intensity was fixed at 3-5 pmol / m ² s' ¹ photon. The speed of the orbital shaker was set at 140 rpm. The experiment was carried out at room temperature for one week. Five hundred microliters of cell culture was obtained from each flask every day to assess cell growth by counting the number of cells. The cells were deflagged with lugol solution (1:20) before counting. The specific growth rate was determined by plotting the number of cells against time. The combination of low white light irradiance and TAP resulted in a higher growth rate compared to controls (Figure 7).
Example 7: Cultivation of microalgae with low light irradiance
Materials and methods
80/82
Strains and media
Microalgae strains (for example, Chlamydomonas, Botryococcus, Neochloris, Cyanophyta, Chlorophyta, Rhodophyta, Cryptophyta, Chlorarachniophyta, Haptophyta, Euglenophyta, Heterokontophyta, diatoms and / or those described in the description above) are obtained from, for example, the collection from, for example of algae culture at the University of Texas (Austin, TX, USA). The stock culture is grown, for example, in 250 mL Erlenmeyer flasks containing the appropriate medium (see, for example, the manufacturer's instructions) at about 25 ° C at room temperature with half-light (for example, 4- 5 pmol / m ² s ¹ photons) in an orbital shaker at about 130 rpm. An appropriate carbon source is used in the culture media, for example, glucose. The half-light lighting can be composed of two different bulbs, for example, 40W aquarium and plant fluorescent light bulbs (Philips 392282) and 40W natural sunlight (Philips 392316). The final pH of the medium is adjusted as appropriate for the particular strain. See, for example, the manufacturer's instructions.
Experimental procedure and growth measurement
Three different wavelengths of light (white, blue and red) are tested. LED lights are purchased, for example, from Super Bright LEDs, Inc. (white: RL5-W3030, blue: RL5-B2430, red: RL5-R1330). For each wavelength of light, four different conditions are established in duplicate as follows:
1-2 without carbon + dark
3-4 without carbon + half-light
5-6 carbon + dark
7-8 carbon + half-light
A total of eight 250 ml Erlenmeyer flasks containing a final 120 ml cell culture volume are
81/82 prepared with an initial cell concentration of, for example, OD 0.1 at 750 nm (-1.1 x 10 ⁶ cells / ml) for each condition. The ideal light intensity (for example, 0.01-300 pmols of photons m ' ² s' ¹ ) and different light spectra (for example, 360-700 nm), as well as different light periods (for example, 9-16 h) are tested. The light intensity is fixed, for example, at 3-4 pmol / m ² s' ¹ photon for white, 2-3 pmol / m ² s' ¹ photon for blue and 1-2 pmol / m ² s' ¹ photon to red. Various sources of carbon in various concentrations are tested, for example, glucose, sucrose, fructose in a concentration of, for example, 1%, 2%, or 3% of the culture media. The speed of the orbital shaker is fixed, for example, at 150 rpm. The experiment is carried out at room temperature for less than one, one, two, three, or more weeks. An aliquot of each cell culture is obtained from each flask every one to two days to assess cell growth, for example, by the dry cell weight (PSC). The specific growth rate is determined by plotting the culture's PSC against time.
Measurement of material of interest
The amount of material of interest (hydrocarbons, lipids, etc.) in the media is measured using standard means known in the art, for example, CG-EM or Nile Red as described above. For example, in 1 ml of algae suspension, 4 µl of Nile Red solution in acetone (250 µg / ml) is added. The mixture is vortexed during incubation at room temperature. After incubation, 100-200 μL of stained algae samples are transferred to individual wells in a 96-well plate. Fluorescence is measured, for example, on a Molecular Devices 96-well plate spectrofluorometer with an excitation wavelength of 4 90 nm and an emission of 585 nm with a 530 emission cut-off filter.
82/82 In order to determine the relative fluorescence intensity of algae samples, the white (Nile Red alone in the middle) is subtracted from the fluorescence intensity.
Results
Red, white and / or blue light in combination with a carbon source increases the growth rate of the microalgae strain compared to controls. The levels of the material of interest (for example, hydrocarbons or lipids) produced by the experimental microalgae strain (red, white and / or blue light in combination with a carbon source) have increased compared to controls.
Although the invention has been particularly shown and described with reference to a preferred embodiment and several alternative embodiments, it will be understood by those skilled in the relevant subject that various changes in form and details can be made without departing from the spirit and scope of the invention.
All references, issued patents and patent applications cited within the body of this specification are incorporated by reference in their entirety, for all purposes.

权利要求:
Claims (6)
[1]
1. METHOD TO GROW MICROALGAS CAPABLE OF HETEROTROPHIC GROWTH, characterized by understanding:
incubate the microalgae in a heterotrophic growth condition for a period of time sufficient to allow the microalgae to grow, in which the heterotrophic growth condition comprises media comprising a fixed carbon source, and in which the heterotrophic growth condition further comprises a irradiance of white light 0.01-4 qmol of photons / m ² s, blue light 0.01-3 qmol of photons / m ² s, and red light 0.01-2 qmol of photons / m ² s, where microalgae is a strain of Botryococcus, strain of Neochloris, or strain of Chlamydomonas.
2. METHOD, according with the claim 1, featured where the microalgae is a strain of Botryococcus sudeticus. 3. METHOD, according with the claim 1, featured where the micro algae is a strain UTEX 2629. 4. METHOD, according with the claim 1, featured where the microalgae is a strain of Botryococcus braunii. 5. METHOD, according with the claim 1, featured where the micro algae is a strain UTEX 2441. 6. METHOD, according with the claim 1, featured where the microalgae is a Neochloris strain oleobundans. 7. METHOD, according with the claim 1, featured where the micro algae is a strain UTEX 1185. 8. METHOD, according with the claim 1, featured where the micro algae is a strain UTEX 2243. 9. METHOD, according with the claim 1, featured where microalgae understand one
photoreceptor.
Petition 870190080467, of 8/19/2019, p. 5/10
[2]
2/4
10. METHOD, according to claim 1, characterized in that the carbon source is glucose.
11. METHOD, according to claim 1, characterized in that the carbon source is selected from the group consisting of a fixed carbon source, glucose, fructose, sucrose, galactose, xylose, mannose, rhamnose, Nacetylglycosamine, glycerol, floridoside , glucuronic acid, corn starch, depolymerized cellulosic material, sugar cane, sugar beet, lactose, whey and molasses.
A method according to claim 1 characterized in that the light is produced by a source of natural light.
13. METHOD according to claim 1, characterized in that the light is natural sunlight.
METHOD, according to claim 1, characterized in that the light comprises the entire light spectrum or a specific wavelength of light.
A method according to claim 1, characterized in that the light is produced by an artificial light source.
16. METHOD according to claim 1, characterized in that the light is artificial light.
17. METHOD according to claim 1, characterized in that it further comprises the production of a material from microalgae.
18. METHOD according to the claim characterized in that the material is a polysaccharide, a pigment, a lipid, or a hydrocarbon.
19. METHOD, according to claim 17, characterized in that the material is a hydrocarbon.
20. METHOD according to claim 17, characterized in that it additionally comprises the recovery of the material.
Petition 870190080467, of 8/19/2019, p. 6/10
[3]
3/4
21. METHOD according to claim 17, characterized in that it further comprises the extraction of the material.
22. METHOD according to claim 17, characterized in that it further comprises the processing of the material.
23. METHOD according to claim 20, characterized in that it further comprises the processing of the material.
24. METHOD, according The claim 23, featured wherein processing of material produces one processed material. 25. METHOD, according The claim 23, featured wherein processed material is selected of
group consisting of a fuel, biodiesel, jet fuel, a cosmetic, a pharmaceutical agent, a surfactant and a renewable diesel.
26. METHOD FOR MANUFACTURING A MATERIAL, characterized by understanding:
provide microalgae capable of producing the material;
cultivating the microalgae in media, under a condition of heterotrophic growth, in which the media comprise a fixed carbon source;
apply an irradiance of white light 0.01-4 pmol of photons / m ² s, blue light 0.01-3 pmol of photons / m ² s, and red light 0.01-2 pmol of photons / m ² s at microalgae; and allow microalgae to accumulate at least 10% of their dry cell weight as the material, where the material is a polysaccharide, a pigment, a lipid, or a hydrocarbon and the microalgae is a strain of Botryococcus, strain of Neochloris, or Chlamydomonas strain.
27. BIORREATOR SYSTEM, characterized by comprising:
Petition 870190080467, of 8/19/2019, p. 7/10
[4]
4/4 a bioreactor;
culture media comprising a fixed carbon source, in which the culture media are located within the bioreactor;
[5]
5 microalgae adapted for heterotrophic growth, in which the microalgae are located in the culture media; and a light source, where the light source produces an irradiance of white light 0.01-4 qmol of photons / m ² s, blue light
[6]
10 0.01-3 qmol of photons / m ² s, and red light 0.01-2 qmol of photons / m ² s, and where the light source is operatively coupled to the bioreactor, where the microalgae is a strain Botryococcus, Neochloris strain, or Chlamydomonas strain.

类似技术:

---

公开号 | 公开日 | 专利标题

---

US20180142197A1|2018-05-24|Microalgae fermentation using controlled illumination

---

US20200032182A1|2020-01-30|Utilization of Wastewater for Microalgal Cultivation

---

JP2019062919A|2019-04-25|Oil corresponding to applications which is produced from recombinant heterotrophic microorganism

---

Peng et al.2020|Biofuel production from microalgae: a review

---

KR101523255B1|2015-05-29|Production of oil in microorganisms

---

ES2583639T3|2016-09-21|Production of specific oils in heterotrophic microorganisms

---

JP2016508717A|2016-03-24|Mutant thioesterase and methods of use

---

US20100297749A1|2010-11-25|Methods and systems for biofuel production

---

US20100170144A1|2010-07-08|Hydroprocessing Microalgal Oils

---

MX2013008651A|2013-09-02|Tailored oils produced from recombinant oleaginous microorganisms.

---

US8956852B2|2015-02-17|Heterotrophic cultivation of hydrocarbon-producing microalgae

---

JP2014513964A|2014-06-19|Genetically engineered microorganisms that metabolize xylose

---

US20180171312A1|2018-06-21|Variant thioesterases and methods of use

---

Homsy2012|Processing algal biomass to renewable fuel: oil extraction and hydrothermal liquefaction

---

Willis2013|Increased production and extraction efficiency of triacylglycerides from microorganisms and an enhanced understanding of the pathways involved in the production of triacylglycerides and fatty alcohols

---

Aguirre2014|Study of high pressure steaming on lipid recovery from microalgae

同族专利:

---

公开号 | 公开日

---

CN102656261A|2012-09-05|

---

US20180371395A9|2018-12-27|

---

ES2732493T3|2019-11-22|

---

IL218657A|2018-11-29|

---

IN2012DN02479A|2015-08-21|

---

IL218657D0|2012-05-31|

---

KR101856055B1|2018-05-09|

---

JP2013505024A|2013-02-14|

---

CA2774542A1|2011-03-24|

---

EP2478089B1|2019-05-08|

---

US20120171733A1|2012-07-05|

---

AU2010295488B2|2016-07-14|

---

CN102656261B|2015-07-01|

---

WO2011035166A1|2011-03-24|

---

US9932554B2|2018-04-03|

---

AU2010295488A1|2012-04-05|

---

US20180142197A1|2018-05-24|

---

KR20120081156A|2012-07-18|

---

EP2478089A1|2012-07-25|

---

EP2478089A4|2014-01-15|

引用文献:

---

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

---

---

US3142135A|1962-02-13|1964-07-28|Grain Processing Corp|Production of carotenoids by the cultivation of algae|

---

JPS564233B2|1973-03-30|1981-01-29|

---

US4683202B1|1985-03-28|1990-11-27|Cetus Corp|

---

US20060094089A1|1988-09-07|2006-05-04|Martek Biosciences Corporation|Process for the heterotrophic production of microbial products with high concentrations of omega-3 highly unsaturated fatty acids|

---

US5130242A|1988-09-07|1992-07-14|Phycotech, Inc.|Process for the heterotrophic production of microbial products with high concentrations of omega-3 highly unsaturated fatty acids|

---

US5340742A|1988-09-07|1994-08-23|Omegatech Inc.|Process for growing thraustochytrium and schizochytrium using non-chloride salts to produce a microfloral biomass having omega-3-highly unsaturated fatty acids|

---

US6451567B1|1988-09-07|2002-09-17|Omegatech, Inc.|Fermentation process for producing long chain omega-3 fatty acids with euryhaline microorganisms|

---

DK1156814T3|1999-03-03|2004-01-12|Eurovita As|Pharmaceuticals, supplements and cosmetic preparations comprising a fatty acid and ginger|

---

MX345559B|2000-01-28|2017-02-03|Dsm Ip Assets B V |Enhanced production of lipids containing polyenoic fatty acids by high density cultures of eukaryotic microbes in fermentors.|

---

AT373098T|2000-04-21|2007-09-15|Martek Biosciences Corp|TROPHICAL CONVERSION OF OBLIGAT PHOTOTROPIC ALGAE BY METABOLIC MANIPULATION|

---

US7248716B2|2001-07-06|2007-07-24|Palantyr Research, Llc|Imaging system, methodology, and applications employing reciprocal space optical design|

---

JP4280158B2|2002-12-27|2009-06-17|富士フイルム株式会社|Microorganisms capable of producing docosahexaenoic acid and use thereof|

---

US20050118262A1|2003-09-17|2005-06-02|Jack Aurora|Controlled release formulation|

---

US8277849B2|2006-01-19|2012-10-02|Solazyme, Inc.|Microalgae-derived compositions for improving the health and appearance of skin|

---

WO2007084769A2|2006-01-19|2007-07-26|Solazyme, Inc.|Microalgae-derived compositions for improving the health and appearance of skin|

---

AU2007270135B9|2006-07-05|2013-06-27|Fermentalg|Production of ultrapure EPA and polar lipids from largely heterotrophic culture|

---

CN101981201A|2006-08-01|2011-02-23|加拿大海洋营养食品有限公司|Oil producing microbes and methods of modification thereof|

---

US9637714B2|2006-12-28|2017-05-02|Colorado State University Research Foundation|Diffuse light extended surface area water-supported photobioreactor|

---

CN101679930A|2007-06-01|2010-03-24|瓦克化学股份公司|Photoreactor|

---

JP2010528627A|2007-06-01|2010-08-26|ソラザイム、インク|Oil production by microorganisms|

---

EP2071019A1|2007-12-15|2009-06-17|Lonza AG|Method for the cultivation of microoranisms of the order thraustochytriales|

---

CN101230364A|2008-02-25|2008-07-30|清华大学|Method for producing biodiesel by high-density fermentation of heterotrophic chlorella|

---

MY143769A|2008-04-30|2011-07-15|Ho Tet Shin|An apparatus for mass cultivation of microalgae and a method for cultivating the same|

---

US8202713B2|2008-05-19|2012-06-19|Zhiyou Wen|Producing eicosapentaenoic acid from biodiesel-derived crude glycerol|

---

US8278090B1|2008-07-03|2012-10-02|Solazyme, Inc.|Heterotrophic cultivation of hydrocarbon-producing microalgae|

---

US8409851B2|2008-12-23|2013-04-02|Param Jaggi|Bioactive carbon dioxide filter apparatus and method therefor|

---

US20170044615A1|2008-12-24|2017-02-16|Cedars-Sinai Medical Center|METHODS OF PREDICTING MEDICALLY REFRACTIVE ULCERATIVE COLITIS REQUIRING COLECTOMY|

---

US8207363B2|2009-03-19|2012-06-26|Martek Biosciences Corporation|Thraustochytrids, fatty acid compositions, and methods of making and uses thereof|

---

US8722375B2|2010-03-05|2014-05-13|Raytheon Company|Algal cell lysis and lipid extraction using electromagnetic radiation-excitable metallic nanoparticles|

---

US10479969B2|2010-10-11|2019-11-19|Phycoil Biotechnology International. Inc.|Utilization of wastewater for microalgal cultivation|

---

WO2013063075A2|2011-10-24|2013-05-02|Heliae Development Llc|Systems and methods for growing photosynthetic organisms|

---

FR3049616B1|2016-04-04|2020-09-25|Inria Inst Nat Rech Informatique & Automatique|SELECTIVE BIOREACTOR FOR MICROALGAE|

---

CA3091297A1|2018-02-20|2019-08-29|Osram Gmbh|Controlled agricultural system and method for agriculture|US20120011620A1|2007-12-21|2012-01-12|Old Dominion University|Algae Strain for Biodiesel Fuel Production|

---

US10479969B2|2010-10-11|2019-11-19|Phycoil Biotechnology International. Inc.|Utilization of wastewater for microalgal cultivation|

---

US8716010B2|2010-12-15|2014-05-06|GE Lighting Solutions, LLC|Solar hybrid photobioreactor|

---

US20140099684A1|2011-05-26|2014-04-10|Council Of Scientific & Industrial Research|Engine worthy fatty acid methyl esterfrom naturally occuring marine microalgal mats and marine microalgae cultured in open salt pans together with value addition of co-products|

---

FR2976292B1|2011-06-08|2015-01-02|Fermentalg|NOVEL ODONTELLA GENRE MICROALGUE STRAIN FOR THE PRODUCTION OF EPA AND DHA IN MIXOTROPIC CULTURE|

---

JP2013035791A|2011-08-09|2013-02-21|Denso Corp|Moisturizer|

---

US9506073B2|2011-11-18|2016-11-29|Board Of Regents, The University Of Texas System|Blue-light inducible system for gene expression|

---

USRE48523E1|2012-03-19|2021-04-20|Algae To Omega Holdings, Inc.|System and method for producing algae|

---

US20150111264A1|2012-05-08|2015-04-23|Kao Corporation|Method for Producing Lipid|

---

KR101886214B1|2012-05-18|2018-08-09|재단법인 포항산업과학연구원|Apparatus for producing of microalgae|

---

WO2014018376A1|2012-07-21|2014-01-30|Grow Energy, Inc.|Systems and methods for bio-mass energy generation|

---

WO2014074772A1|2012-11-09|2014-05-15|Heliae Development, Llc|Mixotrophic, phototrophic, and heterotrophic combination methods and systems|

---

WO2014074770A2|2012-11-09|2014-05-15|Heliae Development, Llc|Balanced mixotrophy methods|

---

JP5779677B2|2013-02-04|2015-09-16|昭和電工株式会社|Plant cultivation method and plant cultivation apparatus|

---

WO2014127225A1|2013-02-14|2014-08-21|Old Dominion University Research Foundation|Algae fertilizers for carbon sequestration|

---

WO2014130362A1|2013-02-25|2014-08-28|Heliae Development, Llc|Systems and methods for the continuous optimization of a microorganism culture profile|

---

JP6036526B2|2013-05-07|2016-11-30|株式会社デンソー|New microalgae and their use|

---

JP6118239B2|2013-11-29|2017-04-19|雅敏 堀|Pest control method and control device|

---

KR101715023B1|2014-01-13|2017-03-10|한국생명공학연구원|Multi functional light supplementary for microalgal culture|

---

CN104805015B|2014-01-26|2018-01-16|中国科学院青岛生物能源与过程研究所|Freshwater microalgae and its application|

---

KR102295303B1|2014-02-20|2021-08-27|부산대학교 산학협력단|Apparatus for cultivation of microalgae using online-monitoring device and method for cultivating microalgae|

---

EP3136872A4|2014-05-02|2017-11-15|Entech, LLC|Methods of microalgae cultivation for increased resource production|

---

KR101606634B1|2014-05-28|2016-03-28|주식회사 바이오에프디엔씨|Mass Production Method of Mycosporine-like amino acid|

---

FR3025214A1|2014-08-26|2016-03-04|Fermentalg|NEW PROCESS FOR CULTIVATION OF ALGAE, PARTICULARLY MICROALGUES|

---

WO2016092576A1|2014-12-09|2016-06-16|Vito Lavanga|Method for distributing a uniform radiative spectrum and device for implementing said method|

---

KR101662304B1|2015-01-08|2016-10-04|가톨릭관동대학교산학협력단|Method of increasing for biomass and lipid content of microalgae using acorns|

---

FR3033799B1|2015-03-20|2019-05-31|Inria Institut National De Recherche En Informatique Et En Automatique|BIOREACTOR FOR MICROALGUES|

---

JP2016182063A|2015-03-26|2016-10-20|国立大学法人 東京大学|Culture medium, and method for suppressing strong light impediment|

---

FR3041653B1|2015-09-25|2017-12-29|Fermentalg|PROCESS FOR CULTIVATION OF ALGAE, PARTICULARLY UNICELLULAR RED ALGAE |

---

JP6589605B2|2015-12-01|2019-10-16|株式会社デンソー|Green algae mutant resistant to strong light and use thereof|

---

CN107287252B|2016-04-01|2020-07-10|中国科学院青岛生物能源与过程研究所|Omega-7 fatty acid composition, method for culturing chrysophyceae to produce composition and application|

---

US11034968B2|2016-06-30|2021-06-15|Kuehnle Agrosystems, Inc.|Heterotrophic production methods for microbial biomass and bioproducts|

---

CA3032878A1|2016-08-05|2018-02-08|Kuehnle Agrosystems, Inc.|Producing and altering microbial fermentation products using non-commonly used lignocellulosic hydrolysates|

---

EP3571283A4|2017-01-22|2020-10-28|Algaennovation Ltd|System and method for growing algae|

---

CN110494546A|2017-01-22|2019-11-22|藻类创新有限公司|System and method for growing algae|

---

WO2019064291A1|2017-09-26|2019-04-04|Brevel Ltd|Systems and methods for closed cultivation using optic fiber to funnel natural light|

---

JP2021506338A|2017-12-14|2021-02-22|ディーアイワイ サービス エルエルシー|Open-loop additive material processes and systems to create a habitable environment for humans|

---

KR101888798B1|2017-12-27|2018-08-14|원종범|Nano silica solution for culture diatoms and manufacturing method thereof|

---

CN107988276A|2018-01-18|2018-05-04|新奥科技发展有限公司|A kind of fatty acid-induced method of microalgae|

---

US10258917B1|2018-02-09|2019-04-16|Tenneco Automotive Operating Company Inc.|System for removing water and particulates from engine exhaust|

---

CN108715793A|2018-04-24|2018-10-30|佛山市瑞生海特生物科技有限公司|A kind of green alga kind by heating wire offer isoperibol grows pipeline|

---

CN110320168B|2019-07-31|2021-07-09|河海大学|Method for measuring light transmittance inside microcystis colony|

---

DE102019214688A1|2019-09-25|2021-03-25|Subitec Gmbh|Method and device for purifying room or city air while providing at least one fraction of valuable substances|

---

KR102147482B1|2019-12-27|2020-08-26|주식회사 비앤비코리아|Cosmetic composition for improving skin aging containing microalgae oil as an active ingredient|

---

ES2843634A1|2020-01-17|2021-07-19|Univ De Las Palmas De Gran Canaria|METHOD TO PRODUCE BIOMASS FROM A MICROALGAE |

---

CN111349567A|2020-04-03|2020-06-30|湛江国联水产开发股份有限公司|Heterotrophic fermentation method suitable for Alternaria hainanensis|

---

CN111172096A|2020-04-11|2020-05-19|杭州富阳君晓农业科技有限公司|Production process for high-density culture of heteroglena|

---

US20210355419A1|2020-05-13|2021-11-18|Sophie's BioNutrients Pte. Ltd.|Bioreactor system for cultivating microalgae|

---

CN113214995A|2020-12-31|2021-08-06|中国水产科学研究院黄海水产研究所|Method for rapid expanded culture and screening and identifying toxin-producing components of pseudo-rhombohedral alga|

法律状态:
2018-04-10| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

---

2018-10-09| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|

---

2019-05-21| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|

---

2019-09-17| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

---

2019-11-26| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 17/09/2010, OBSERVADAS AS CONDICOES LEGAIS. (CO) 20 (VINTE) ANOS CONTADOS A PARTIR DE 17/09/2010, OBSERVADAS AS CONDICOES LEGAIS |

优先权:

---

申请号 | 申请日 | 专利标题

---

US24359309P| true| 2009-09-18|2009-09-18|

---

US61/243,593|2009-09-18|

---

US35972610P| true| 2010-06-29|2010-06-29|

---

US61/359,726|2010-06-29|

---

PCT/US2010/049347|WO2011035166A1|2009-09-18|2010-09-17|Microalgae fermentation using controlled illumination|

---