CN104291438A - Method and system for producing biogas through two-stage anaerobic processing of high-concentration waste - Google Patents

Method and system for producing biogas through two-stage anaerobic processing of high-concentration waste Download PDF

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Publication number
CN104291438A
CN104291438A CN201410420087.8A CN201410420087A CN104291438A CN 104291438 A CN104291438 A CN 104291438A CN 201410420087 A CN201410420087 A CN 201410420087A CN 104291438 A CN104291438 A CN 104291438A
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China
Prior art keywords
anaerobic reactor
reactor
biogas
water
anaerobic
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CN201410420087.8A
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Chinese (zh)
Inventor
吴赛明
韦星任
杨海洋
袁良平
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HANGZHOU QINGCHENG ENERGY ENVIRONMENTAL PROTECTION ENGINEERING Co Ltd
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HANGZHOU QINGCHENG ENERGY ENVIRONMENTAL PROTECTION ENGINEERING Co Ltd
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Priority to CN201410420087.8A priority Critical patent/CN104291438A/en
Publication of CN104291438A publication Critical patent/CN104291438A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/286—Anaerobic digestion processes including two or more steps
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention discloses a method and system for producing biogas through two-stage anaerobic processing of high-concentration waste, the processing method comprises the following steps: pretreating high-concentration livestock waste water in a pre-treatment pool; introducing the treated livestock waste water into a first stage anaerobic reactor, fermenting in a continuous stirred tank reactor to generate biogas; then introducing effluent into a secondary stage anaerobic reactor through an outlet pipe, completing water distributing, gas production and three-phase separating in an upflow anaerobic sludge blanket, purifying the generated biogas and then introducing biogas into production for usage; and introducing the processed effluent into a sedimentation basin for subsequent processing, and then discharging. The constructed two-stage anaerobic reactor can enforce the high efficiency anaerobic fermentation to high-concentration waste, thereby renewable energy biogas is generated, and effective processing of livestock and poultry waste water is realized simultaneously, and the selected material has the advantages of reliable quality, low cost and obvious energy effect.

Description

A kind of high-concentration waste gurry two-stage anaerobic produces treatment process and the treatment system of biogas
Technical field
The invention belongs to sewage treatment area, particularly a kind for the treatment of process of high-concentration waste gurry and treatment system.
Background technology
The excremental feature of livestock and poultry farm is that quantity discharged is large, organic concentration is high, SS content is high, and waste water of livestock poultry has good biodegradability simultaneously, and anaerobic digestion is comparatively easy.Anaerobic digestion techniques process waste water of livestock poultry is utilized to produce renewable energy source---biogas, not only Be very effective, and livestock and poultry farm movement can be made to accomplish minimizing, resource utilization and innoxious, this is to environmental protect, and realizing economic Sustainable development has great contribution.
The advantage that anaerobic digestion techniques has it huge compared to other art process technologies: 1) comprehensive benefit is obvious: this technology takes into account environment protection, biomass energy exploitation and Development of Recycle Agriculture, has significant social benefit, source benefit and economic benefit; 2) applied widely: to have very strong suitability to livestock and poultry farm movement that is dissimilar, different concns; 3) operational management is convenient: investment comparatively economizes, energy consumption is lower, working cost is low, convenient operation and management.
But current anaerobic digestion techniques process waste water is many only adopts one-level anaerobic system, energy consumption is high, poor processing effect, and cost is high.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of two-stage anaerobic treatment technology is provided, fully organism is converted into biogas, effectively process the high-concentration waste gurry of livestock culture, Be very effective, with low cost.
For achieving the above object, the present invention takes following technical proposals to realize:
High-concentration waste gurry two-stage anaerobic produces a treatment process for biogas, comprises the following steps:
A. high density poultry waste water carries out pre-treatment in pre-treatment pond;
B. the poultry waste water after process enters one-level anaerobic reactor, ferments in continuous-stirring reactor, produces biogas;
C. enter secondary anaerobic reactor by rising pipe after reaction, in upflow anaerobic sludge blanket reactor, complete water distribution, aerogenesis and three phase separation;
D. the biogas produced enters production and application after purification; Water outlet after process enters after settling tank carries out subsequent disposal and discharges.
Further, the pre-treatment of described poultry waste water comprises hydraulic screen net filtration and hydrolysis acidification pool process.
Further, treated in steps d waste water enters follow-up aerobicly to process.
Further, waste water residence time in one-level anaerobic reactor is 3 ~ 6 days; The water outlet of one-level anaerobic reactor enters secondary anaerobic pond, and hydraulic detention time is 2 ~ 6 days; The waste water of secondary anaerobic reactor enters settling tank, and hydraulic detention time is 1 day.
Further, the heat energy reclaimed after biogas combustion generating is used for heating of one-level anaerobic reactor, makes it maintain medium temperature condition, save energy.
Present invention also offers the treatment system that a kind of high-concentration waste gurry two-stage anaerobic produces biogas, comprise one-level anaerobic reactor, secondary feed tank and secondary anaerobic reactor, wherein waterwater entrance connects one-level anaerobic reactor by pump, one-level anaerobic reactor connects secondary feed tank by rising pipe, secondary feed tank water outlet pump connects secondary anaerobic reactor, and the water outlet of secondary anaerobic reactor is connected with settling tank.
Further, improve, specifically comprise the structure in anaerobic reactor and system: establish in described one-level anaerobic reactor and heat coil pipe, coil pipe height is 2/5 of available depth, coil pipe is 1/4 ~ 1/3 tank skin radius apart from reactor wall.
Further, described one-level anaerobic reactor peripheral hardware recycle pump, inside establish water distributor, water distributor is dendritic distribution.
Further, secondary anaerobic reactor water inlet is water distribution uniformity, and establish water distributor in reactor, water distributor is dendritic distribution.
Compared with prior art, the present invention has the following advantages:
High-concentration waste gurry is carried out efficient two-stage anaerobic fermentation by the present invention, and organic substance is converted into renewable energy source---biogas, and turn waste into wealth, reach resource utilization object, volume gas production rate is at 0.35 more than m3/d; Needed for two-stage anaerobic technology, energy consumption only has the half of one-level anaerobic technology, decreases working cost; The present invention adopts two-stage anaerobic technique to COD, SS process in high-concentration waste gurry, takes into account natural pond liquid biodegradability, find the suitableeest requirement between the two while the maximum product biogas of consideration.
Further, by improving firsts and seconds anaerobic reactor structure, the productive rate of biogas can be improved.
Accompanying drawing explanation
Fig. 1 is process route chart of the present invention.
Fig. 2 is present invention process schematic flow sheet.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiment 1
Pig farm is the most common is also larger livestock and poultry farm, Pig dung and urine is representative in waste water of livestock poultry, the composition of all kinds of waste water of livestock poultry is also roughly the same, therefore applicable equally for process the present invention of other waste water of livestock poultry, and therefore in the present embodiment, waste water of livestock poultry selects piggery wastewater.
Wherein farm animal excrement, comprises feces of livestock and poultry, urine; Waste water of livestock poultry, comprises livestock and poultry urine, portion of stool and wash-down water.
Fig. 1 is process route chart of the present invention, and Fig. 2 is present invention process schematic flow sheet.Composition graphs 1 and Fig. 2 visible, concrete treatment step comprises:
1) main parameter that waste water of livestock poultry carries out after pre-treatment through waterpower screen cloth and hydrolysis acidification pool is: COD 14250mg/L, influent load 8kg/(m 3d).CSTR reactor useful volume is 3000 m 3, the pH of control CSTR reactor is at 6.5-7.5, and heating cycle water tank control temperature is between 30-35 DEG C, and daytime stirred once every 4 hours.Each stirring 20 minutes, hydraulic detention time 5 days.After testing, every day biogas stable yield at 1200 m 3.
2) CSTR water outlet enters UASB reactor after the short stay of secondary feed tank.Enter UASB reactor by the lifting of pump and proceed degraded, by the triphase separator of UASB, water, gas, mud are separated.During reaction, the water inlet flow velocity of control UASB is 2m/s, and within 2.5 days, by detecting, average biogas output is 800m to hydraulic detention time 3/ d, COD clearance reaches about 70%.
3) prove through example detection, the average removal rate of waste water of livestock poultry COD after CSTR and UASB two-stage anaerobic is more than 80%, and aerogenesis meets and is stabilized in 0.35 m 3/ (m 3d) more than.
When present method is implemented, the anaerobic methane production mud that in CSTR reactor, inoculation has been tamed, piggery wastewater enters CSTR, and control COD influent load is at 10kgCOD/(m 3d); Piggery wastewater adopts bubble excrement technique, and the process water yield is 600m 3/ d, influent COD 14250mg/L, one-level anaerobic reactor 3000m 3, secondary anaerobic reactor 1500m 3.Average every day, biogas output was 1800 m 3/ d, volume yield rate is 0.4 m 3/ (m 3d).Concrete data are as shown in table 1:
Parameters during the two-stage anaerobic process of table 1 piggery wastewater.

Claims (9)

1. high-concentration waste gurry two-stage anaerobic produces a treatment process for biogas, it is characterized in that, the treating method comprises following steps:
A. high-concentration waste gurry carries out pre-treatment in pre-treatment pond;
B. the liquid debris after process enters one-level anaerobic reactor, ferments in continuous-stirring reactor, produces biogas;
C. enter secondary anaerobic reactor by rising pipe after reaction, in upflow anaerobic sludge blanket reactor, complete water distribution, aerogenesis and three phase separation;
D. the biogas produced enters production and application after purification; Water outlet after process enters after settling tank carries out subsequent disposal and discharges.
2. treatment process according to claim 1, is characterized in that, the pre-treatment of institute's high-concentration waste gurry comprises hydraulic screen net filtration and hydrolysis acidification pool process.
3. treatment process according to claim 1, is characterized in that, establish in described one-level anaerobic reactor and heat coil pipe, coil pipe height is 2/5 of available depth, and coil pipe is 1/4 ~ 1/3 tank skin radius apart from reactor wall.
4. treatment process according to claim 1, is characterized in that, described one-level anaerobic reactor peripheral hardware recycle pump, inside establish water distributor, water distributor is dendritic distribution.
5. treatment process according to claim 1, is characterized in that, secondary anaerobic reactor water inlet is water distribution uniformity, and establish water distributor in reactor, water distributor is dendritic distribution.
6. treatment process according to claim 1, is characterized in that, waste water treated in steps d enters follow-up aerobicly to process.
7. treatment process according to claim 1, is characterized in that, waste water residence time in one-level anaerobic reactor is 3 ~ 6 days; The water outlet of one-level anaerobic reactor enters secondary anaerobic pond, and hydraulic detention time is 2 ~ 6 days; The waste water of secondary anaerobic reactor enters settling tank, and hydraulic detention time is 1 day.
8. treatment process according to claim 1, is characterized in that, the heat energy reclaimed after the biogas combustion generating of generation is used for heating of one-level anaerobic reactor.
9. the treatment system of a high-concentration waste gurry two-stage anaerobic product biogas, it is characterized in that, comprise one-level anaerobic reactor, secondary feed tank and secondary anaerobic reactor, wherein waterwater entrance connects one-level anaerobic reactor by pump, one-level anaerobic reactor connects secondary feed tank by rising pipe, secondary feed tank water outlet pump connects secondary anaerobic reactor, and the water outlet of secondary anaerobic reactor is connected with settling tank.
CN201410420087.8A 2014-08-25 2014-08-25 Method and system for producing biogas through two-stage anaerobic processing of high-concentration waste Pending CN104291438A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105347478A (en) * 2015-11-20 2016-02-24 中冶南方工程技术有限公司 High-efficiency and low-energy consumption anaerobic digester and application thereof
CN105836969A (en) * 2016-05-14 2016-08-10 厦门史帝福环保科技有限公司 Pig farm wastewater treatment method
CN106167335A (en) * 2016-08-20 2016-11-30 南方创业（天津）科技发展有限公司 A kind of feces of farm and waste water energy source recovery apparatus
CN106430567A (en) * 2016-10-26 2017-02-22 江苏中金环保科技有限公司 Technology for treating organic wastewater by means of efficient anaerobic reactor
CN109368916A (en) * 2018-11-06 2019-02-22 常州大学 A kind of IAO-MBR sewage treatment Integration Equipment and its technique
CN109626774A (en) * 2018-11-20 2019-04-16 华南农业大学 A kind of pig manure diafiltration bed produces biogas and compost integrated apparatus and its method
CN111646639A (en) * 2020-05-25 2020-09-11 广东维清环境工程有限公司 Breeding wastewater treatment process of pre-oxygenation-two-stage anaerobic membrane bioreactor

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CN102583930A (en) * 2012-03-17 2012-07-18 山东民和生物科技有限公司 Livestock excrement biogas generation method and livestock excrement biogas generation system
CN102992565A (en) * 2012-10-09 2013-03-27 贵州泰然环境科技有限责任公司 Technology for producing methane by utilizing waste of large chicken house
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JP2007289946A (en) * 2006-03-31 2007-11-08 Ebara Corp Anaerobic treatment process and device of organic solid waste
CN102583930A (en) * 2012-03-17 2012-07-18 山东民和生物科技有限公司 Livestock excrement biogas generation method and livestock excrement biogas generation system
KR20140004989A (en) * 2012-07-04 2014-01-14 최영철 Hybrid thermophilic anaerobic digestion process for the combined treatment of food-waste and pig-manure.
CN102992565A (en) * 2012-10-09 2013-03-27 贵州泰然环境科技有限责任公司 Technology for producing methane by utilizing waste of large chicken house

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105347478A (en) * 2015-11-20 2016-02-24 中冶南方工程技术有限公司 High-efficiency and low-energy consumption anaerobic digester and application thereof
CN105347478B (en) * 2015-11-20 2017-12-22 中冶南方工程技术有限公司 A kind of anaerobic digester of high-efficiency low energy consumption and its application
CN105836969A (en) * 2016-05-14 2016-08-10 厦门史帝福环保科技有限公司 Pig farm wastewater treatment method
CN105836969B (en) * 2016-05-14 2019-01-18 厦门史帝福环保科技有限公司 A kind of Wastewater from Pig Farm processing method
CN106167335A (en) * 2016-08-20 2016-11-30 南方创业（天津）科技发展有限公司 A kind of feces of farm and waste water energy source recovery apparatus
CN106430567A (en) * 2016-10-26 2017-02-22 江苏中金环保科技有限公司 Technology for treating organic wastewater by means of efficient anaerobic reactor
CN106430567B (en) * 2016-10-26 2019-10-08 江苏中金环保科技有限公司 A kind of technique of high efficiency anaerobic reactor processing organic wastewater
CN109368916A (en) * 2018-11-06 2019-02-22 常州大学 A kind of IAO-MBR sewage treatment Integration Equipment and its technique
CN109626774A (en) * 2018-11-20 2019-04-16 华南农业大学 A kind of pig manure diafiltration bed produces biogas and compost integrated apparatus and its method
CN111646639A (en) * 2020-05-25 2020-09-11 广东维清环境工程有限公司 Breeding wastewater treatment process of pre-oxygenation-two-stage anaerobic membrane bioreactor

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Application publication date: 20150121