CN106430563A - Treatment system and treatment method for up-to-standard discharge of livestock and poultry wastewater - Google Patents

Treatment system and treatment method for up-to-standard discharge of livestock and poultry wastewater Download PDF

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Publication number
CN106430563A
CN106430563A CN201610511663.9A CN201610511663A CN106430563A CN 106430563 A CN106430563 A CN 106430563A CN 201610511663 A CN201610511663 A CN 201610511663A CN 106430563 A CN106430563 A CN 106430563A
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pond
level
anaerobic
treatment system
water
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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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    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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
    • C02F3/28—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
    • C02F3/30—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
    • 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
    • C02F3/02—Aerobic processes
    • 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
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/121—Multistep treatment
    • 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
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
    • 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)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention discloses a treatment method and a treatment system for livestock and poultry wastewater. The method includes the steps of: conducting pretreatment on high concentration livestock and poultry wastewater in a pretreatment tank; letting the treated livestock and poultry wastewater enter a first stage anaerobic reactor, conducting continuous stirring on the material in the reactor to conduct fermentation so as to produce biogas; after reaction, letting the effluent water enter a second stage anaerobic reactor through a water outlet pipe, and completing water distribution, gas production and three-phase separation in an upflow type anaerobic sludge bed reactor; letting the treated effluent water enter a first stage biochemical treatment to conduct treatment, and then performing solid-liquid separation; and making the treated supernatant enter a second stage biochemical treatment system for treatment. The system and method provided by the invention utilize two-stage biochemical treatment system to implement efficient anaerobic fermentation and aerobic operation treatment of livestock and poultry wastewater, thus realizing up-to-standard discharge treatment of livestock and poultry wastewater while achieving production of renewable energy source biogas. The selected materials are reliable in quality and low in cost, the energy effect is significant, and the system and method are energy saving and environment-friendly.

Description

A kind of processing system of poultry discharged wastewater met the national standard and processing method
Present patent application be the applying date be August in 2014 25 days, Application No. 201410421528.6, entitled one Plant the processing system of waste water of livestock poultry qualified discharge and the divisional application of the Chinese patent application of processing method.
Technical field
The invention belongs to sewage treatment area, particularly to a kind of processing method of poultry discharged wastewater met the national standard and processing system System.
Background technology
The emission of scale fowl and livestock farm is only just comprehensively utilized or directly through preliminary Anaerobic Treatment mostly Enter water body, be one of topmost pollution sources in agricultural pollution.With economic growth, in the period of future is longer in, support Grow industry to continue to develop further, and the requirement of environment is also more and more tighter.Unsound for economically feasible technology shortage, management system Etc. outstanding problem, the feature in conjunction with livestock culture industry is it is necessary to by the experiment and demonstration of tackling problems in key technologies and technology, set up fowl The high-performance bio treatment technology system of poultry plant emission, is the Environmental capacity of livestock culture emission and pollution meets cuts Subtract and economic and practical technology mode is provided.
The feature of fowl and livestock farm excreta is that discharge capacity is big, organic concentration is high, SS content high, using conventional dirt Water process mode there will still likely be that biodegradability is poor, C/N is little, aerobic after-treatment system poor processing effect the problems such as, therefore develop Go out the poultry wastewater processing technology of high-efficiency and economic, reduce pollutant and there is to the pollution of environment very necessity and urgency.
Content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, provides a kind of two-stage anaerobic treatment technology to combine Two-Stage Biochemical Treatment technology, (wherein two-stage anaerobic treatment technology is separately applied for), fully organic matter is converted into biogas, effectively processes Poultry waste water, effect is significant, reach discharge standard, with low cost.
For achieving the above object, the present invention takes following technical proposals to realize：
A kind of processing method of poultry discharged wastewater met the national standard, comprises the following steps：
A. process before high concentration poultry waste water is carried out in front process pond；
B. the poultry waste water after processing enters one-level anaerobic reactor, is fermented in continuous-stirring reactor, produces natural pond Gas；
C. after reacting, secondary anaerobic reactor is entered by outlet pipe, in upflow anaerobic sludge blanket reactor, complete cloth Water, aerogenesis and three phase separation；
D. the biogas producing enters production and application after purifying；Water outlet after process enters one-level biochemical treatment system and enters Row is processed, separation of solid and liquid after process；
E. the supernatant after processing enters secondary biochemical treatment system and is processed；
In step d, one-level biochemical treatment system includes successively：Flotation tank, A/O pond, first stage precipitation tank (a heavy pond), A2/O Pond, second-level settling pond；Water outlet after process enters A/O pond after first passing through air-float technology, and the water outlet of A/O pond enters first stage precipitation tank (second pond), supernatant after precipitation enters A2/ O pond, A2The water outlet of/O pond enters into separation of solid and liquid in second-level settling pond；
Secondary biochemical treatment system in step e includes successively：Contact-oxidation pool, coagulative precipitation tank, the filter of BAF aeration and biological Pond, sterilization pool；In step d, the supernatant of second-level settling pond enters contact-oxidation pool, removes organic pollutants further, its Water outlet enters in coagulative precipitation tank, removes no oedema suspension and particulate matter further, subsequently into the filter of BAF aeration and biological Pond, final outflow water is up to standard.
Further, the pre-treatment of described poultry waste water includes the waterpower screen cloth of collecting-tank and carries out separation of solid and liquid and hydrolysis acidification Pond carries out feeding precipitation process.
Further, further, A2/ O pond includes anaerobic pond, anoxic pond and Aerobic Pond, and waste water carries out mud in anaerobic pond The release of middle phosphorus, carries out anti-nitration reaction, organic pollution is degraded by microorganisms in Aerobic Pond in anoxic pond, and ammonia nitrogen occurs Nitration reaction, the nitrate nitrogen of generation and nitrite nitrogen are back to anoxic pond and carry out anti-nitration reaction, and the nitrogen of generation overflows.
Further, waste water time of staying in one-level anaerobic reactor is 3～6 days, preferably 5 days；One-level anaerobic reactor Water outlet enter secondary anaerobic pond, hydraulic detention time be 2～6 days, preferably 2.5 days.
Further, the heat energy reclaiming after biogas combustion being generated electricity is used for the heating so as to maintain of one-level anaerobic reactor Medium temperature condition, energy saving.
Present invention also offers a kind of processing system of poultry discharged wastewater met the national standard, including one-level anaerobic reactor, two grades Feed tank and secondary anaerobic reactor, wherein waterwater entrance connect one-level anaerobic reactor by pump, and one-level anaerobic reactor leads to Cross outlet pipe and connect two grades of feed tanks, two grades of feed tank water outlet pumps connect secondary anaerobic reactor, secondary anaerobic reactor Outlet pipe be connected one-level biochemical treatment system, one-level biochemical treatment system outlet pipe connects secondary biochemical treatment system, two grades Biochemical treatment system water outlet connects discharge pond.
Wherein one-level biochemical treatment system includes successively：Flotation tank, A/O pond, first stage precipitation tank, A2/ O pond, two-stage precipitation Pond, wherein A2/ O pond includes anaerobic pond, anoxic pond and Aerobic Pond.
A2/ O pond includes anaerobic pond, anoxic pond and Aerobic Pond, and waste water carries out the release of phosphorus in mud in anaerobic pond, is lacking Carry out anti-nitration reaction, organic pollution is degraded by microorganisms in Aerobic Pond, ammonia nitrogen occurs nitration reaction, generation in oxygen pond Nitrate nitrogen and nitrite nitrogen are back to anoxic pond and carry out anti-nitration reaction, and the nitrogen of generation overflows.
Further, secondary biochemical treatment system includes successively：Contact-oxidation pool, coagulative precipitation tank, the filter of BAF aeration and biological Pond, sterilization pool.
Further, the structure in anaerobic reactor and system are improved, set in described one-level anaerobic reactor and heat Coil pipe, coil pipe height is the 2/5 of available depth, and coil pipe is 1/4～1/3 tank skin radius away from reactor wall；Described one-level anaerobism is anti- Answer device peripheral hardware circulating pump, inside set water distributor, water distributor is dendritic distribution；Secondary anaerobic reactor is intake as water distribution uniformity, reaction Water distributor is set, water distributor is dendritic distribution in device.
Compared with prior art, the present invention has advantages below：
The present invention carries out Two-Stage Biochemical process, again by organic matter after poultry waste water is carried out efficient two-stage anaerobic fermentation Matter is converted into regenerative resource biogas, turns waste into wealth, and reaches resource purpose, volume gas production is in 0.35m3/ more than d； Energy consumption needed for two-stage anaerobic technology only has the half of one-level anaerobic technology, decreases operating cost.
Two-Stage Biochemical processing system has its big advantage compared to other art process technologies：1) comprehensive benefit is obvious： This technology takes into account environmental protection, biomass energy exploitation and Development of Recycle Agriculture, has significant social benefit, source benefit and warp Ji benefit；2) applied widely：There is very strong applicability to dissimilar, variable concentrations fowl and livestock farm excreta； 3) operational management is convenient：Investment is compared with province, energy consumption is relatively low, operating cost is low, convenient operation and management.
Further, by improving firsts and seconds anaerobic reactor structure, the yield of biogas can be improved.
Further, by the appropriate design of Two-Stage Biochemical processing system, for the feature of poultry waste water, removal effect Good, with low cost.
Brief description
Fig. 1 is the process route chart of the present invention.
Fig. 2 is present invention process schematic flow sheet.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention Rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content of present invention instruction, people in the art Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited Scope.
Embodiment 1
Pig farm be most common be also larger fowl and livestock farm, Pig dung and urine is representative in poultry waste water, all kinds of fowl The composition of poultry waste water is also roughly the same, therefore the process present invention for other poultry waste water is equally applicable, therefore in the present embodiment Poultry waste water selects piggery wastewater.
Wherein poultry excreta, including fowl and animal excrement, urine；Poultry waste water, including poultry urine, portion of stool and flushing Water.
Fig. 1 is the process route chart of the present invention, and Fig. 2 is present invention process schematic flow sheet.Visible in conjunction with Fig. 1 and Fig. 2, tool Body process step includes：
1) poultry waste water through the main parameter that waterpower screen cloth and hydrolysis acidification pool are carried out after pre-treatment is： COD20000mg/L, influent load 8kg/ (m3·d).CSTR reactor dischargeable capacity is 1200m3, control the pH of CSTR reactor In 6.5-7.5, heat cycles water tank controls temperature between 30-35 DEG C, and daytime is every stirring in 4 hours once.Stirring 20 every time Minute, hydraulic detention time 5 days.After testing, the stable yield of daily biogas is in 500m3.
2) CSTR water outlet enters UASB reactor after two grades of feed tank short stays.UASB is lifted into by pump Reactor proceeds to degrade, and by the three phase separator of UASB, water, gas, mud is carried out separating.Control entering of UASB during reaction Water flow velocity is 2m/s.By detection, average biogas output is 800m3/ d, COD clearance reaches 70% about.
3) prove through example detection, poultry waste water average removal rate of COD after CSTR and UASB two-stage anaerobic exists More than 80%, aerogenesis meets to be stablized in 0.35m3/(m3D) more than.
4) one-level biochemical treatment system：Enter back in A/O pond after first passing through air-float technology, A/O pond be divided into anaerobic pond, Aerobic Pond.Anaerobic pond is mainly biological phosphate-eliminating and sets, and sewage here is mixed with the mud flowing back, and carries out releasing of phosphorus in mud Put；The nitrate nitrogen producing in Aerobic Pond and nitrite nitrogen are back to generation denitrification in anoxic pond, generate nitrogen ease Go out, reach denitrogenation purpose.The water outlet of A/O pond enters first stage precipitation tank.Supernatant after precipitation enters into A2In/O pond.A2/ O pond It is divided into anaerobic pond, anoxic pond, Aerobic Pond.Anaerobic pond is mainly biological phosphate-eliminating and sets, and sewage here is mixed with the mud of backflow, and Carry out the release of phosphorus in mud；Anoxic pond is substantially carried out anti-nitration reaction, the nitrate nitrogen of generation and nitrite in Aerobic Pond Nitrogen is back to generation denitrification in anoxic pond, generates nitrogen effusion, reaches denitrogenation purpose.Meanwhile, in Aerobic Pond, organic dirt Dye thing most of microorganism under aerobic condition is degraded, and ammonia nitrogen occurs nitration reaction simultaneously.A2The water outlet of/O pond enters into two and sinks Separation of solid and liquid in pond.
5) secondary biochemical treatment system：Second pond supernatant enters in contact-oxidation pool, removes in sewage further Organic pollution, its water outlet enters in coagulative precipitation tank, removes suspension and particulate matter in sewage further, subsequently into BAF BAF is so that final outflow water qualified discharge.
When this method is implemented, the anaerobic methane production mud of inoculation domestication in CSTR reactor, piggery wastewater enters CSTR, Control COD influent load in 10kgCOD/ (m3D), this pig farm adopts bubble excrement technique, and the process water yield is 400m3/ d, water inlet COD20000mg/L.The concrete data of the treatment effect in sewage disposal each stage is as shown in table 1：
The treatment effect table in table 1 sewage disposal each stage

Claims (7)

1. a kind of processing method of poultry discharged wastewater met the national standard is it is characterised in that the treating method comprises following steps：
A. process before high concentration poultry waste water is carried out in front process pond；
B. the poultry waste water after processing enters one-level anaerobic reactor, is fermented in continuous-stirring reactor, produces biogas；
C. after reacting, secondary anaerobic reactor is entered by outlet pipe, in upflow anaerobic sludge blanket reactor, complete water distribution, product Gas and three phase separation；
D. the biogas producing enters production and application after purifying；Water outlet after process enters at one-level biochemical treatment system Reason, separation of solid and liquid after process；
E. the supernatant after processing enters secondary biochemical treatment system and is processed；
In step d, one-level biochemical treatment system includes successively：Flotation tank, A/O pond, first stage precipitation tank, A2/ O pond, second-level settling pond； Water outlet after process first passes through and enters A/O pond after air-float technology, and the water outlet of A/O pond enters first stage precipitation tank, after precipitation upper Clear liquid enters A2/ O pond, A2The water outlet of/O pond enters into separation of solid and liquid in second-level settling pond；
Secondary biochemical treatment system in step e includes successively：Contact-oxidation pool, coagulative precipitation tank, BAF BAF, Sterilization pool；In step d, the supernatant of second-level settling pond enters contact-oxidation pool, removes organic pollutants further, it goes out Water enters in coagulative precipitation tank, removes no oedema suspension and particulate matter further, subsequently into BAF BAF, Final outflow water is up to standard.
2. processing method according to claim 1 heats coil pipe it is characterised in that setting in described one-level anaerobic reactor, Coil pipe height is the 2/5 of available depth, and coil pipe is 1/4～1/3 tank skin radius away from reactor wall.
3. processing method according to claim 1 is it is characterised in that described one-level anaerobic reactor peripheral hardware circulating pump, interior If water distributor, water distributor is dendritic distribution.
4. processing method according to claim 1 is it is characterised in that secondary anaerobic reactor is intake as water distribution uniformity, instead Answer and in device, set water distributor, water distributor is dendritic distribution.
5. processing method according to claim 1 is it is characterised in that A2/ O pond includes anaerobic pond, anoxic pond and Aerobic Pond, Waste water carries out the release of phosphorus in mud in anaerobic pond, carries out anti-nitration reaction in anoxic pond, organic contamination in Aerobic Pond Thing is degraded by microorganisms, and ammonia nitrogen occurs nitration reaction, the nitrate nitrogen of generation and nitrite nitrogen to be back to anoxic pond and carry out instead Nitration reaction, the nitrogen of generation overflows.
6. a kind of poultry waste water two-stage anaerobic produce biogas processing system it is characterised in that include one-level anaerobic reactor, two grades Feed tank and secondary anaerobic reactor, wherein waterwater entrance connect one-level anaerobic reactor by pump, and one-level anaerobic reactor leads to Cross outlet pipe and connect two grades of feed tanks, two grades of feed tank water outlet pumps connect secondary anaerobic reactor, secondary anaerobic reactor Outlet pipe be connected one-level biochemical treatment system, one-level biochemical treatment system outlet pipe connects secondary biochemical treatment system, two grades Biochemical treatment system water outlet connects discharge pond；One-level biochemical treatment system includes successively：Flotation tank, A/O pond, first stage precipitation tank, A2/ O pond, second-level settling pond；
A2/ O pond includes anaerobic pond, anoxic pond and Aerobic Pond, and waste water carries out the release of phosphorus in mud in anaerobic pond, in anoxic pond In carry out anti-nitration reaction, in Aerobic Pond, organic pollution is degraded by microorganisms, ammonia nitrogen occur nitration reaction, the nitric acid of generation Salt nitrogen and nitrite nitrogen are back to anoxic pond and carry out anti-nitration reaction, and the nitrogen of generation overflows.
7. processing system according to claim 6 is it is characterised in that secondary biochemical treatment system includes successively：Contact oxygen Change pond, coagulative precipitation tank, BAF BAF, sterilization pool.
CN201610511663.9A 2014-08-25 2014-08-25 Treatment system and treatment method for up-to-standard discharge of livestock and poultry wastewater Pending CN106430563A (en)

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CN112794552A (en) * 2020-12-14 2021-05-14 北京汇恒环保工程股份有限公司 Treatment method of sauce-flavor wine wastewater

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