• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:

    公开号:NL1041065A
    申请号:NL1041065
    申请日:2014-11-25
    公开日:2016-07-07
    发明作者:Christiaan Emanuel Zagt Ir
    申请人:Christiaan Emanuel Zagt Ir；
    IPC主号:
    专利说明:

    System and method for dosing hydrogen gas to an Autogenerative High Pressure Digestion installation with the aim of biologically converting carbon dioxide into extra methane at high pressure.
    The present invention relates to a system and method intended to make useful use of the carbon dioxide released by the AHPD process patented by Zagt Zelf BV and patented on October 13, 2010 under number 1037103. R.E.F. Lindeboom has written a dissertation (ISBN 978-94-6173-860-8) about the AHPD process that was successfully defended at Wageningen University on 27 February 2014.
    AHPD is a continuous process in which organic substrates (such as, for example, biomass, waste water, sewage sludge) are injected into a closed reactor and are converted therein through, among other things, biocatalysis to carbon dioxide and methane gas. As a result of the biological gas production in the closed reactor, pressure is built up as shown in figure 1 and figure 2. Due to Henry's law, undesirable components such as carbon dioxide and hydrogen sulphide are dissolved in the water phase in green gas. AHPD therefore produces green gas with a methane content of 80-99% from organic substrates under biologically built up pressure. In addition to separating the produced gas and the digested sludge, the water phase is also separately removed from the AHPD reactor while the particles remain inside as much as possible. If a filter or membrane is used in the separation of water and particles in an advantageous embodiment, the resulting water stream is referred to as "permeate". After reducing the pressure of this permeate stream by, for example, a restriction, a pressure exchanger, or another advantageous embodiment, the gases dissolved under pressure are released from the water stream or the permeate. This gas mixture mainly consists of carbon dioxide (CO2) but also a fraction of hydrogen sulphide (H2S) and a fraction of methane (CH4) and ammonia (NH3). This pressure-reduced stream is introduced at the top of a gas stripper with the aim of removing the gases from the water or permeate as much as possible. A typical advantageous embodiment of the AHPD process is included as Figure 3.
    The present invention reduces the amount of CO 2 initially formed in the AHPD process from the conversion of substrate by adding additional hydrogen from an external source. This other source can be a stream or residual stream of hydrogen gas from a conventional physico-chemical process, or hydrogen that has been deliberately produced at low cost from wind energy or solar power, for example, during peak times where the price of electricity is low due to supply and demand or as due to overcapacity on the electricity grid. This creates a so-called "Power-to-Gas" system, which is advantageous because of the property that methane gas can be stored in the existing natural gas infrastructure more easily than electricity.
    The operation of the invention is based on a microbiological process in which certain bacteria combine hydrogen and carbon dioxide in the ratio 4: 1 to methane and water in the ratio 1: 2 and thereby produce energy for their growth according to the formula: "4H2 + CO2 = > CH4 + 2 H2 + Energy ". For example, Jan T. Keltjens (Anthony van Leeuwenhoek 50 (1984) 383-396) published on this biological process in 1984. The literature shows that the injection of extra hydrogen can also promote the reduction of sulphate to sulphide, which is also an objective of the present AHPD process.
    The addition of hydrogen to an AHPD system results in an AH2PD system, a characteristic embodiment of which is shown in Figure 4. The advantage of this is that the solubility of gases under the influence of the pressure in the AHPD reactor according to Henry's law is greater than in conventional power-to-gas systems with lower pressure. In an AHPD system that functions according to an advantageous embodiment at 20 bar, therefore, a factor of 20 more gas can be dissolved. Because the required gaseous substrates of hydrogen and carbon dioxide are present at elevated concentrations in proportion to that pressure as a result of Henry's law, both the amount of methane, its production rate, and the efficiency of methane formation will increase compared to conventional low pressure systems. At the same time, the amount of carbon dioxide that was initially produced with AHPD without hydrogen injection decreases in proportion to the amount of methane produced via additional hydrogen. As a result, the emission of carbon dioxide is reduced proportionally. The concentration of the harvestable methane also increases due to the reduction of the amount of carbon dioxide and the higher production of methane. The concentration of methane in the ultimately produced green gas can therefore be increased to values up to a maximum of 100% methane, which greatly increases the commercial applicability.
    The system contains an AHPD reactor according to an advantageous embodiment to which an injection point or an electrode for dosing hydrogen gas has been added. The AH2PD system contains at least one measurement to measure the hydrogen concentration in the system. The system contains a measurement and control system to coordinate and monitor the various process steps.
    In an advantageous embodiment, instead of hydrogen, pok-free electrons can be added in accordance with the mechanism described in the thesis of Dr. Mieke C.A.A. van Eerten-Jansen entitled: "Bioelectrochemical methane production from C02" with ISBN number 978-94-6257-006-1, defended at Wageningen University on September 19, 2014. In that case, no extra hydrogen is dosed but free electrons that ultimately end up with a higher yields have the same effect.
    Literature list
    Scientific publications
    Autogenerative high pressure digestion: Anaerobic digestion and biogas upgrading in a single step reactor system. Water Science and Technology, 64 (3), 647-653.
    Lindeboom, R.E.F., Weijma, J., and van Lier, J.B., (2012). High-calorific biogas production by selective CO2 retention at autogenerated biogas pressures up to 20 bar. Environmental Science & Technology, 46 (3), 1895-1902.
    Lindeboom, REF, Ferrer I., Weijma, J. and van Lier JB, (2013) Silicate minerals for CO2 scavenging from biogas in Autogenerative High Pressure Digestion, Water Research, DOI: http://dx.doi.org/10.1016/ j.watres.2013.04.028.
    Jan T. Keltjens, Coenzymes or methanogenesis from hydrogen and carbon dioxide. Anthony van Leeuwenhoek 50 (1984) 383-396. Lindeboom R.E.F., PhD Thesis Wageningen University and Research Center, 27-02-2014, ISBN no. 978-6173-860-8.
    Van Eerten-Jansen, C.A.A., PhD Thesis Wageningen University and Research Center, 10-09-2014, ISBN no. 978-94-6257-006-1.
    Conference proceedings
    Anaerobic Fermentations, Goldschmidt Conference, Knoxville, Tennessee, USA (poster).
    Lindeboom, R.E.F., Fermoso, FG, Weijma, J, Zagt, K & Lier, JB van (2010). Autogenerative high pressure digestion: a new concept for biogas upgrading, in s.n. (Ed.), IWA world conference on anaerobic digestion (pp. 1-8). Guadelajara: IWA. Lindeboom, R.E.F., Fermoso, F.G., J. Weijma, K. Zagt and J.B. van Lier (2010). Autogenerative High Pressure Digestion: anaerobic digestion and biogas upgrading in a single step reactor system. In: Proc. Or IWA Int. Water and Energy Conference, November 10-12, 2010, Amsterdam, The Netherlands. Lindeboom R.E.F. , Weijma J., Zagt, K., and J.B. van Lier, 2011, 'Biogenic Natural Gas' Formation in a Pressurized Lab Scale Reactor, Goldschmidt Conference, Prague, Czech Republic.
    Lindeboom R.E.F, Zagt, C.E., Weijma, J., and van Lier, J. B., 2011, Operational implications of Autogenerative High Pressure Digestion, IWA-Young Water Professionals conference, Leuven, Belgium.
    Lindeboom R.E.F., 2013, High pressure digestion, 65th holiday course in Drinking water and Waste water, TuDelft.
    Professional literature and reports
    Zagt, K., Barelds, J., Lindeboom, R., Weijma, J., Plugge, C., Van Lier, J. (2010) Energy from sewage water and kitchen waste at high pressure, H20.
    权利要求:
    Claims (1)
    [1]
    A system for biologically increasing the methane concentration through the injection of additional hydrogen in a high-pressure fermentation process such as AHPD, the system comprising: a high-pressure fermentation such as, for example, an AHPD installation; - at least one injection point at a favorable location for dosing hydrogen; a measurement for measuring the hydrogen concentration in the system; an operating system for controlling the process.
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    同族专利:
    公开号 | 公开日
    NL1041065B1|2016-07-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    NL1033083C1|2006-12-19|2007-04-06|Christiaan Emanuel Zagt|Control system for high pressure membrane bioreactor for producing biogas and water from effluent, uses measuring device for pressure inside reactor tank to regulate flow of gas and liquid phase through membranes|
    WO2011005079A1|2009-07-08|2011-01-13|Zagt Zelf B.V.|System and method for purifying an aqueous organic matter, waste and/or wastewater under pressure and method for producing biogas|
    WO2012110257A1|2011-02-17|2012-08-23|Alexander Krajete|System and method for storing energy in the form of methane|
    WO2013060331A1|2011-10-24|2013-05-02|Technical University Of Denmark|Methods and apparatus for hydrogen based biogas upgrading|
    US20130189763A1|2011-12-14|2013-07-25|Kiverdi, Inc.|Method and apparatus for growing microbial cultures that require gaseous electron donors, electron acceptors, carbon sources, or other nutrients|
    WO2014016815A2|2012-07-27|2014-01-30|Ffgf Limited|Production of methane|
    法律状态:
    2018-07-04| MM| Lapsed because of non-payment of the annual fee|Effective date: 20171201 |
    优先权:
    申请号 | 申请日 | 专利标题
    NL1040902|2014-07-31|
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