• 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:
    A process for digestion of sludge comprises introducing the sludge and aeration feed gas to a first digestion zone, oxygenating the sludge therein at a temperature of from 35 to 75 DEG C to form partially stabilized sludge and then anaerobically digesting the partially stabilized sludge in a covered second digestion zone at a temperature of from 25 to 60 DEG C to form further stabilized sludge and methane gas.
    公开号:SU973013A3
    申请号:SU782676102
    申请日:1978-10-12
    公开日:1982-11-07
    发明作者:Стефен Гоулд Майкл；Чарльз Матш Ладислас
    申请人:Юнион Карбид Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    (54)
    METHOD OF TREATMENT SEDIMENTS The invention relates to methods for treating sewage sludge and can be used at biological treatment plants for domestic and industrial wastewater. The known method of aerobic treatment of sewage sludge at 40-8 ° C 1. The method of treating sewage sludge, in particular sludge, by heating to a temperature of 65 ° C, followed by aerobic or anaerobic digestion, is closest to the proposed technical essence and the achieved result. at 25 - 60 ° С t2. The disadvantages of the method are high. ka cost of the process and processing time, as well as a small yield of methane. The purpose of the invention is to increase the efficiency of the process. The goal is achieved by the fact that sewage sludge is subjected to a two-stage treatment - thermal at 35 - 75 ° C with aeration for 4 to 48 hours and anaerobic digestion at 25 DETAILS of 6 ° C, followed by separation of sediment and gas. . The method is carried out as follows. The precipitate and the oxygen containing gas are heat treated at 35 - 75 ° C and with stirring, supporting the total content of suspended solids in the sediment of about 2OOOO mg / l. Aerobic treatment is carried out for 4 to 48 hours until the content of biodegradable suspended solids in the sediment is partially reduced while the osapka is partially stabilized. Then this partially stabilized sediment is subjected to anaerobic treatment at 25-60 ° C for a time sufficient to further reduce the content of biodegradable substances in the sediment and to form methane gas. A temperature of 35 - 75 ° C in the zone of aerobic treatment is chosen, based on the fact that it is in this range that a fast biologist takes place: the chemical decomposition contains precipitate of suspended solids.
    The dwelling and sedimentation time in the aerobic zone is chosen based on the fact that, with a dwell time of less than 4 hours, the degree s of sediment stabilization required in the next anaerobic treatment zone becomes disproportionately large in relation to the level of stabilization in the first aerobic step. The residence time of non-10 must exceed 48 hours, because with a longer time the degree of stabilization of the sediment in the aerobic treatment zone becomes excessively large relative to the residual stabilization in the anaerobic stu-15 penalty, so that the amount of methane in the latter decreases,
    Example. The precipitate, containing 39,400 mg / l of solids with a temperature, is heated at the inlet to 20–23 ° C in a preheater using methane. Methane consumption a. A) 708 m / day,
    In the zone of aerobic treatment, K) T is maintained at a temperature of 8 ° C and the precipitate is kept for 24 hours, while the precipitate is partially statilized. A sediment containing suspended solids in the amount of 26,100 mg / l is fed to the auxiliary acidification zone, where it is held for 24 hours. Then the precipitate {23,500 mg / l of suspended solid resin) is fed to the anaerobic treatment, KOTopjao is carried out for 5 days. At this station, 2067 m of methane is produced in 1 day. Since the heater requires only 708 m / day, 1360 MV / day of methane can be obtained for production needs.
    The method allows to increase the efficiency of the process by reducing energy costs, reducing the amount of necessary equipment in the methane output.
    权利要求:
    Claims (2)
    [1]
    Invention Formula
    The method of treating sewage sludge inclusive two-stage treatment, thermal and anaerobic digestion at 25 - 60 ° C, followed by separation of sludge and gas, characterized in that, in order to increase the economical process, the thermal process is carried out at 35 - 75 ° C with aeration during 4-48 h. Priority by sign
    13.10.77 two-step treatment, heat treatment with aeration and anaerobic digestion.
    26.O7.78 anaerobic digestion at 25 - and heat treatment at 35 - 75 ° C.
    Sources of information taken into account at. expertise
    1. Patent of France No. 2331522, class, C O2 C 3/00, 07.15.1977.
    [2]
    2. The patent of France J 2277042, kp. C 02 C 3/00, 1976.
    类似技术:
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    同族专利:
    公开号 | 公开日
    IT1116823B|1986-02-10|
    ES474110A1|1979-07-16|
    IT7851482D0|1978-10-12|
    FR2440920B2|1984-06-29|
    DE2844498A1|1979-04-19|
    DE2844498C2|1985-08-29|
    DD140740A5|1980-03-26|
    ATA732678A|1987-11-15|
    ES476599A1|1979-07-16|
    CA1115432A|1981-12-29|
    PH17462A|1984-08-29|
    JPS5464848A|1979-05-25|
    GB2006743A|1979-05-10|
    AT385979B|1988-06-10|
    BR7806742A|1979-05-08|
    DK454978A|1979-04-14|
    FR2440920A2|1980-06-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3368967A|1965-10-19|1968-02-13|Beloit Corp|Process for treatment of sludge and apparatus therefor|
    DE1584958A1|1965-12-20|1970-02-05|Heinrich Onnen|Method and device for cleaning waste water|
    US3926794A|1974-06-28|1975-12-16|Union Carbide Corp|Warm sludge digestion with oxygen|DE2852544C2|1978-12-05|1982-11-04|Menzel Gmbh & Co, 7000 Stuttgart|Process for stabilizing and largely sanitizing sewage sludge from sewage treatment plants|
    US4276174A|1980-03-26|1981-06-30|Union Carbide Corporation|Control of sludge temperature in autothermal sludge digestion|
    FR2614888B1|1987-05-07|1989-08-18|Jullien Antonin|PROCESS FOR THE METHANIC FERMENTATION OF ORGANIC MATERIALS AND DEVICE FOR IMPLEMENTING SAME|
    DE3813844C2|1988-04-23|1993-12-23|Fuchs Leonhard|Process for decontaminating sewage sludge|
    AT397382B|1992-01-14|1994-03-25|Ingerle Kurt Dipl Ing Dr Techn|METHOD FOR DENITRIFYING WASTEWATER|
    ES2070787B1|1993-12-01|1996-01-01|S E De Carburos Metalicos S A|NEW PROCEDURE FOR THE DIGESTION OF SLUDGE IN WASTEWATER TREATMENT TREATMENTS.|
    DE602004029202D1|2004-07-30|2010-10-28|Eiwa Land Environment Co Ltd|WASTE WATER TREATMENT DEVICE|
    JP4929641B2|2005-08-04|2012-05-09|日本下水道事業団|Organic waste liquid treatment equipment|
    JP4665693B2|2005-09-30|2011-04-06|栗田工業株式会社|Method and apparatus for treating organic waste|
    US8894856B2|2008-03-28|2014-11-25|Evoqua Water Technologies Llc|Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods|
    US8894857B2|2008-03-28|2014-11-25|Evoqua Water Technologies Llc|Methods and systems for treating wastewater|
    EP2279152A4|2008-03-28|2012-11-28|Siemens Industry Inc|Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods|
    US8685247B2|2009-12-03|2014-04-01|Evoqua Water Technologies Llc|Systems and methods for nutrient removal in biological treatment systems|
    CN103068748A|2010-08-18|2013-04-24|西门子工业公司|Contact-stabilization/prime-float hybrid|
    US9359236B2|2010-08-18|2016-06-07|Evoqua Water Technologies Llc|Enhanced biosorption of wastewater organics using dissolved air flotation with solids recycle|
    GB2527989B|2013-05-06|2020-04-22|Evoqua Water Tech Llc|Enhanced biosorption of wastewater organics using dissolved air flotation with solids recycle|
    CN110683724A|2019-11-13|2020-01-14|湖南军信环保股份有限公司|Treatment method for improving centrifugal dehydration efficiency of anaerobic sludge|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US84190277A| true| 1977-10-13|1977-10-13|
    US92809978A| true| 1978-07-26|1978-07-26|
    KR1019780003213A|KR830001900B1|1978-10-25|1978-10-25|Aerobic and Anaerobic Sludge Decomposition|
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