• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a process and an apparatus for the purification of waste waters containing organic substances, in particular for the effective removal of nitrogen and phosphorus, which are characterised by three sections (sequence: anaerobic - aerobic - semianaerobic), a high load and short residence time. In the apparatus according to the invention, by regulating the residence time of the sludge in the associated sedimentation vessel in comparison to systems with total oxidation, a significantly more effective removal of nitrogen and phosphorus from the waste waters (effluents) containing the organic substances can be achieved, without precipitation chemicals and/or external carbon sources for denitrification being required. The system, as required, can be extended by an apparatus for sludge treatment, with the aid of which the purification of the sludge water and return into the system can be achieved.
    公开号:SU1688787A3
    申请号:SU874202577
    申请日:1987-05-19
    公开日:1991-10-30
    发明作者:Янош Адам Роберт；Ашот Ласло；Хараси Ласло；Кальман Дьердь；Керчмар Ласло；Корда Рудольф；Кубо Шандор；Палоц Ласло；Жираи Иштван
    申请人:Татабаньаи Сенбаньак (Инопредприятие)；
    IPC主号:
    专利说明:

    The invention relates to methods for treating water and can be used to remove organic matter, nitrogen and phosphorus compounds in water during biochemical purification processes.
    The aim of the invention is to increase the degree of purification.
    For carrying out the process, the wastewater is sequentially treated under anaerobic conditions for 1.0-2.5 hours, then in aerobic with a specific load on activated sludge not more than 0.25 kg BOD / kg or for 1 day, after which it is subjected semi-aerobic treatment and again returned to the aerobic zone. Water is then allowed to settle for no more than 0.5 hours, activated sludge is separated, recycled sludge is fed to the anaerobic stage, and excess is subjected to anaerobic stabilization.
    The drawing shows the scheme of wastewater treatment.
    Wastewater 1 is fed to mixer 2, where excess activated sludge is also introduced from the sump. Activated sludge is used for its breathing oxygen contained in waste water, so that the treatment of water in tank 2a occurs under anaerobic conditions with an oxygen content below 0.1 mg / l.
    The anaerobic tank 2a is closed, with an upper inlet and outlet, in the middle divided by a wall into two parts. The dividing wall at its lower end does not reach the bottom of the basin 60-100 cm. The mixer located in mixer 2 is selected so that a vertically directed flow is provided for the incoming sludge and waste water at a speed of at least 10 mm / s.
    O 00 00 XI 00 V4
     W
    The residence time of the wastewater in the mixer is 5 minutes (feed + recycle). As a result of wastewater treatment in tank 2a, anaerobic decomposition of organic substances occurs and the formation of water-soluble compounds from organically bound nitrogen and phosphorus. Anaerobic treatment is carried out for 2.5 hours. This time is necessary and sufficient to prevent the proliferation of methane-forming bacteria, and with them freely structured and poorly precipitated filamentous bacteria that multiply under aerobic conditions, as well as to form bacterial microflora, withstand aerobic-anaerobic conditions.
    After anaerobic treatment, wastewater is supplied to aerobic pool 3, the content of dissolved oxygen in which is more than 2 g / l, the concentration of activated sludge is more than 3 g / l, and the load on activated sludge does not exceed 0.25 kg BOD / kg or 1 day .
    From the aerobic basin 3, a portion of the wastewater is supplied to the semi-anaerobic basin 4. There is a forced exchange between the two basins, with the amount of sludge being 6-100% of the input amount of the wastewater. The residence time in the semi-aerobic pool 4 is 30-50 minutes. The sludge introduced into the basin enters with dissolved oxygen, the concentration of dissolved oxygen in the first section of the basin exceeds 0.1 mg / l, but does not reach 0.4 mg / l.
     In the second section of the semi-aerobic basin, dissolved oxygen is absent.
    Basin 4 is similar in design to reservoir 2a with the difference that it does not have a mixing space.
    The location of all pools should be such as to ensure the withdrawal of water from their upper part. Connecting pools of different zones at a lower level is not recommended.
    From the aerobic pool 3 sludge mixture enters the settling tank 5. where the separation of the purified water 6 from the activated sludge occurs.
    The time of settling should not exceed 30 minutes. An increase in the duration of settling can lead to a significant increase in the phosphate content of the purified water. The density of activated sludge in the sump during this time increased by 2.5 times.
    After the sump, recycled activated sludge 7 is fed to the anaerobic purification stage, and excess activated sludge 8 is subjected to anaerobic stabilization 9.
    In the presence of calcium, aluminum, or iron salts, the phosphates contained in the high-strength liquid are converted into insoluble compounds, after which it can be mixed with the feedstock.
    0 sewage.
    PRI me R 1. Purify urban sewage with a flow rate of 52.7 m3 per day, characterized by the following indicators, mg / l: BOD
    5,226.1; phosphates 16.1; ammonium nitrogen 30.0; nitrites 0.1; total nitrogen 53.4.
    The volume of the anaerobic zone is 4.4 m3, the semi-anaerobic one is 1.8 m3, the aerobic one is 12.4 m3. The treatment is carried out with the proposed parameters. Purified water has the following indicators, mg / l: BOD5 10.8; phosphates 6.5: ammonium nitrogen 5.0; nitrites 1,1; total nitrogen 19.6.
    The degree of purification is,%:
    5 95.2; phosphates 60.5; ammonium nitrogen 83.3: total nitrogen 63.0.
    PRI mme R 2. Urban sewage after settling is treated with a discharge rate of 74.6 m3 / day and the following characteristics, mg / l: BOD &131.7; phosphates 10.4; ammonium nitrogen 32.3; nitrites 0.1; total nitrogen 87.5.
    The treatment is carried out according to Example 1. The purified water has the following indices, mg / l: BODCb; phosphates 4.4; ammonium nitrogen 6.5; nitrites 1.6; total nitrogen 21.4. The degree of purification is,%: BODK 95; phosphates 58.1; ammonium nitrogen 79.9; total nitrogen is 62.8.
    0 The table presents comparative data on the cleaning efficiency of the known and proposed methods.
    The proposed method makes it possible to increase the degree of purification of wastewater from organic pollution, nitrogen and phosphorus with a higher consumption of wastewater, to maintain the degree of nitrification with a higher specific content of nitrogen and phosphorus, to obtain purified water with a nitrite content not exceeding 2 mg / l.
    权利要求:
    Claims (1)
    [1]
    The invention of the method of wastewater treatment, including sequential treatment in anaerobic, semi-anaerobic and aerobic
    5 conditions in the presence of activated sludge followed by sedimentation, separation of the activated sludge and its recycling, characterized in that. that, in order to increase the degree of purification, the wastewater is sequentially treated under anaerobic, aerobic and semi-anaerobic conditions, after which 1.0-2.5 hours.
    return to aerobic treatment, activated sludge in the process of aerobic treatment recirculation of activated sludge does not exceed 0.25 kg BOD / kg sludge per day.,
    at the anaerobic stage, and the time of anaaa and the settling time of the activated sludge of the non-borobic treatment of wastewater is 5 more than 0.5 h.
    The way to govravot "and Indicators zhachest. A and
    BOD5, mg / lgoc / n, mg /
     , lp ™ g :, g: -, ° - L
    "1.4 39.
    226.1 137.1
    93.5 94.9
    2, 2,0
    10.8 45.2 6.6 95.0
    , mg /
    Increase content
    2, 2.7
    5.0 6.5
    72.4 67.9
    83.3 79.9
    0.05 0.06
    0.1 0.1
    2.9 3.6
    1.6 1.1
    2.85 3.54
    1.5 1, °
    类似技术:
    公开号 | 公开日 | 专利标题
    US4948510A|1990-08-14|Biological phosphorous removal from wastewater using multiple recombinable basins
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    US4183808A|1980-01-15|Phosphate removal from wastewater
    US5543051A|1996-08-06|Biological phosphorus removal from waste water
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    SU1688787A3|1991-10-30|Method of sewage treatment
    FR2673618A1|1992-09-11|PROCESS FOR BIOLOGICAL PURIFICATION OF WATER BY NITRIFICATION AND DENITRIFICATION.
    JP2661093B2|1997-10-08|Wastewater treatment method by activated sludge method
    JPS56150493A|1981-11-20|Disposal of organic waste water
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    同族专利:
    公开号 | 公开日
    EG18700A|1995-09-30|
    DE3716782A1|1987-11-26|
    ATA117387A|1992-08-15|
    HU205330B|1992-04-28|
    PL265770A1|1988-08-18|
    AT395845B|1993-03-25|
    HUT44746A|1988-04-28|
    PL158608B1|1992-09-30|
    CS275878B6|1992-03-18|
    DE3716782C2|1992-09-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4315821A|1975-01-06|1982-02-16|Du Pont Canada Inc.|Treatment of nitrogenous wastes|
    US4042493A|1975-10-28|1977-08-16|Union Carbide Corporation|Phosphate removal from BOD-containing wastewater|
    US4056465A|1976-04-12|1977-11-01|Air Products And Chemicals, Inc.|Production of non-bulking activated sludge|
    US4271026A|1979-10-09|1981-06-02|Air Products And Chemicals, Inc.|Control of activated sludge wastewater treating process for enhanced phosphorous removal|
    DK149767C|1983-07-28|1987-02-23|Krueger As I|PROCEDURE FOR BIOLOGICAL CLEANING OF WASTE WATER|
    US4650585A|1984-04-17|1987-03-17|Air Products And Chemicals, Inc.|Method for minimizing diurnal swing in phosphorus content of effluent streams from wastewater treating plants|US5252214A|1987-02-27|1993-10-12|Gunter Lorenz|Biological dephosphatization and nitrification|
    DE3706405A1|1987-02-27|1988-09-08|Guenter Dipl Ing Lorenz|WASTE WATER TREATMENT METHOD|
    GR1002427B|1988-08-26|1996-09-06|Jurgen Lorenz|Method of sewage treatment|
    DE4100685A1|1991-01-11|1992-07-16|Sued Chemie Ag|METHOD FOR CLEANING WATER CONTAINING PHOSPHATES AND NITROGEN COMPOUNDS|
    KR950704199A|1992-11-06|1995-11-17|미카엘 크니히트|How to biologically remove phosphorus from wastewater|
    EP1307409A1|2000-08-03|2003-05-07|Ladislav Penzes|Activated sludge method and device for the treatment of effluent with nitrogen and phosphorus removal|
    GB0624167D0|2006-12-04|2007-01-10|Univ Gent|Process and apparatus for the biological treatment of waste water|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    HU862103A|HU205330B|1986-05-19|1986-05-19|Process for purifying sewage containing organic material, by increased removal of phosphorus and nitrogen|
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