CN104291517A - Standard discharge treatment system for livestock and poultry waste water and method thereof - Google Patents
Standard discharge treatment system for livestock and poultry waste water and method thereof Download PDFInfo
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- CN104291517A CN104291517A CN201410421528.6A CN201410421528A CN104291517A CN 104291517 A CN104291517 A CN 104291517A CN 201410421528 A CN201410421528 A CN 201410421528A CN 104291517 A CN104291517 A CN 104291517A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
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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
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
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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
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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
- C02F3/30—Aerobic and anaerobic processes
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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
- 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
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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
- C02F3/02—Aerobic processes
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/121—Multistep treatment
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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
- C02F3/02—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
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- 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
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- 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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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a standard discharge treatment system for livestock and poultry waste water and a method thereof, the method comprises the following steps: pretreating livestock and poultry waste water with high concentration in a pre-treatment pool; introducing the treated livestock and poultry waste water in a first stage anaerobic reactor, continuously stirring in the reactor, then fermenting to obtain biogas; reacting and introducing in a secondary anaerobic reactor through an outlet pipe, completing water distribution, performing gas production and three-phase separation in an upflow anaerobic sludge blanket; introducing the processed effluent in a first stage biochemical treatment system for processing, performing solid-liquid separation; and then introducing a supernatant in a secondary biochemical treatment system for processing. According to the invention, two stage anaerobic reactors and two stage biochemical treatment systems are combined for performing high efficiency anaerobic fermentation and aerobic operation treatment on the livestock and poultry waste water, so that renewable energy biogas is generated, and treatment for livestock and poultry waste water standard discharge can be simultaneously realized, and the materials have the advantages of reliable quality, low cost, obvious energy effect, energy saving and environmental protection.
Description
Technical field
The invention belongs to sewage treatment area, particularly a kind for the treatment of process of waste water of livestock poultry qualified discharge and treatment system.
Background technology
The discharge of livestock and poultry farms in scale only just carries out fully utilizing or directly entering water body through preliminary anaerobic treatment mostly, is one of topmost source of pollution in agricultural pollution.Along with the growth of economy, within the period that future is longer, aquaculture continues to further develop, and the requirement of environment is also more and more tighter.The outstanding problem such as to lack, management system is unsound for economically feasible technology, in conjunction with the feature of livestock and poultry breeding industry, it may be necessary the experiment and demonstration of tackling problems in key technologies and technology, set up the high-performance bio treatment technology system of livestock and poultry farm discharge, the reduction that Environmental capacity and pollution for livestock and poultry cultivation discharge meet provides economic and practical technology mode.
The excremental feature of livestock and poultry farm is that quantity discharged is large, organic concentration is high, SS content is high, adopt conventional sewage treatmentmethod still may there is the problem such as biodegradability difference, little, the aerobic after-treatment system poor processing effect of C/N, therefore develop the waste water of livestock poultry treatment technology of efficient economy, the pollution of decreasing pollution thing to environment has necessity very and urgency.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, there is provided a kind of two-stage anaerobic treatment technology in conjunction with Two-Stage Biochemical treatment technology, (wherein two-stage anaerobic treatment technology separate case application), fully organism is converted into biogas, effectively process poultry waste water, Be very effective, reaches emission standard, with low cost.
For achieving the above object, the present invention takes following technical proposals to realize:
A treatment process for waste water of livestock poultry qualified discharge, 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 one-level biochemical treatment system and processes, solid-liquid separation after process;
E. the supernatant liquor after process enters secondary biochemical treatment system and processes.
Further, the waterpower screen cloth that the pre-treatment of described poultry waste water comprises water collecting basin carries out solid-liquid separation and hydrolysis acidification pool carries out charging precipitation process.
Further, in steps d, one-level biochemical treatment system comprises successively: air flotation pool, A/O pond, first stage precipitation tank (a heavy pond), A
2/ O pond, second-level settling pond; Water outlet after process is first by entering A/O pond after air-float technology, the water outlet of A/O pond enters first stage precipitation tank (second pond), and supernatant liquor after precipitation enters A
2/ O pond, A
2the water outlet of/O pond enters into second-level settling pond solid-liquid separation.
Further, A
2/ O pond comprises anaerobic pond, anoxic pond and Aerobic Pond, waste water carries out the release of phosphorus in mud in anaerobic pond, anti-nitration reaction is carried out in anoxic pond, in Aerobic Pond, organic pollutant is degraded by microorganisms, ammonia nitrogen generation nitration reaction, the phosphoric acid salt nitrogen produced and nitrite nitrogen are back to anoxic pond and carry out anti-nitration reaction, and the nitrogen of generation overflows.
Further, the secondary biochemical treatment system in step e comprises successively: contact-oxidation pool, coagulative precipitation tank, BAF BAF, sterilization pool; In steps d, the supernatant liquor of second-level settling pond enters contact-oxidation pool, removes organic pollutants further, and its water outlet enters into coagulative precipitation tank, and remove without oedema suspended substance and particulate matter further, then enter BAF BAF, final outflow water is up to standard.
Further, waste water residence time in one-level anaerobic reactor is 3 ~ 6 days, preferably 5 days; The water outlet of one-level anaerobic reactor enters secondary anaerobic pond, and hydraulic detention time is 2 ~ 6 days, preferably 2.5 days.
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 a kind for the treatment of system of waste water of livestock poultry qualified discharge, 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, the rising pipe of secondary anaerobic reactor be connected one-level biochemical treatment system, one-level biochemical treatment system rising pipe connects secondary biochemical treatment system, and the water outlet of secondary biochemical treatment system connects discharge pond.
Further, one-level biochemical treatment system comprises successively: air flotation pool, A/O pond, first stage precipitation tank, A
2/ O pond, second-level settling pond, wherein A
2/ O pond comprises anaerobic pond, anoxic pond and Aerobic Pond.
Further, secondary biochemical treatment system comprises successively: contact-oxidation pool, coagulative precipitation tank, BAF BAF, sterilization pool.
Further, improve 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, and coil pipe is 1/4 ~ 1/3 tank skin radius apart from reactor wall; Described one-level anaerobic reactor peripheral hardware recycle pump, inside establish water distributor, water distributor is dendritic distribution; 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:
The present invention carries out Two-Stage Biochemical process after waste water of livestock poultry is carried out efficient two-stage anaerobic fermentation again, and organic substance is converted into renewable energy source---and biogas, turn waste into wealth, reach resource utilization object, volume gas production rate is at 0.35m
3/ more than d; Needed for two-stage anaerobic technology, energy consumption only has the half of one-level anaerobic technology, decreases working cost.
The advantage that Two-Stage Biochemical treatment system 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.
Further, by improving firsts and seconds anaerobic reactor structure, the productive rate of biogas can be improved.
Further, by the appropriate design of Two-Stage Biochemical treatment system, for the feature of poultry waste water, removal effect is good, with low cost.
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 20000mg/L, influent load 8kg/ (m
3d).CSTR reactor useful volume is 1200m
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 500m
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.By detecting, average biogas output is 800m
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 0.35m
3/ (m
3d) more than.
4) one-level biochemical treatment system: first by entering into A/O pond again after air-float technology, A/O pond is divided into anaerobic pond, Aerobic Pond.Anaerobic pond is mainly biological phosphate-eliminating and establishes, and sewage mixes with the mud refluxed at this, and carries out the release of phosphorus in mud; The nitrate nitrogen produced in Aerobic Pond and nitrite nitrogen are back in anoxic pond and denitrification occur, and generate nitrogen effusion, reach denitrogenation object.The water outlet of A/O pond enters first stage precipitation tank.Supernatant liquor after precipitation enters into A
2in/O pond.A
2/ O pond is divided into anaerobic pond, anoxic pond, Aerobic Pond.Anaerobic pond is mainly biological phosphate-eliminating and establishes, and sewage mixes with the mud refluxed at this, and carries out the release of phosphorus in mud; Anoxic pond mainly carries out anti-nitration reaction, and the nitrate nitrogen produced in Aerobic Pond and nitrite nitrogen are back in anoxic pond and denitrification occurs, and generates nitrogen effusion, reaches denitrogenation object.Meanwhile, in Aerobic Pond, organic pollutant most of microorganism under aerobic condition is degraded, simultaneously ammonia nitrogen generation nitration reaction.A
2the water outlet of/O pond enters into second pond solid-liquid separation.
5) secondary biochemical treatment system: second pond supernatant liquor enters into contact-oxidation pool, organic pollutant in further removal sewage, its water outlet enters into coagulative precipitation tank, suspended substance and particulate matter in further removal sewage, then enter BAF BAF, make final outflow water qualified discharge.
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), this pig farm adopts bubble excrement technique, and the process water yield is 400m
3/ d, influent COD 20000mg/L.The concrete data of the treatment effect in sewage disposal each stage are as shown in table 1:
The treatment effect table in table 1 sewage disposal each stage
Claims (10)
1. a treatment process for waste water of livestock poultry qualified discharge, is characterized in that, the treating method comprises 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 one-level biochemical treatment system and processes, solid-liquid separation after process;
E. the supernatant liquor after process enters secondary biochemical treatment system and processes.
2. 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.
3. 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.
4. 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.
5. treatment process according to claim 1, is characterized in that, in steps d, one-level biochemical treatment system comprises successively: air flotation pool, A/O pond, first stage precipitation tank, A
2/ O pond, second-level settling pond; Water outlet after process is first by entering A/O pond after air-float technology, the water outlet of A/O pond enters first stage precipitation tank, and supernatant liquor after precipitation enters A
2/ O pond, A
2the water outlet of/O pond enters into second-level settling pond solid-liquid separation.
6. treatment process according to claim 5, is characterized in that, A
2/ O pond comprises anaerobic pond, anoxic pond and Aerobic Pond, waste water carries out the release of phosphorus in mud in anaerobic pond, anti-nitration reaction is carried out in anoxic pond, in Aerobic Pond, organic pollutant is degraded by microorganisms, ammonia nitrogen generation nitration reaction, the phosphoric acid salt nitrogen produced and nitrite nitrogen are back to anoxic pond and carry out anti-nitration reaction, and the nitrogen of generation overflows.
7. treatment process according to claim 1, is characterized in that, the secondary biochemical treatment system in step e comprises successively: contact-oxidation pool, coagulative precipitation tank, BAF BAF, sterilization pool; In steps d, the supernatant liquor of second-level settling pond enters contact-oxidation pool, removes organic pollutants further, and its water outlet enters into coagulative precipitation tank, and remove without oedema suspended substance and particulate matter further, then enter BAF BAF, final outflow water is up to standard.
8. the treatment system of a waste water of livestock poultry 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, the rising pipe of secondary anaerobic reactor be connected one-level biochemical treatment system, one-level biochemical treatment system rising pipe connects secondary biochemical treatment system, and the water outlet of secondary biochemical treatment system connects discharge pond.
9. treatment system according to claim 8, is characterized in that, one-level biochemical treatment system comprises successively: air flotation pool, A/O pond, first stage precipitation tank, A
2/ O pond, second-level settling pond.
10. treatment system according to claim 8, is characterized in that, secondary biochemical treatment system comprises successively: contact-oxidation pool, coagulative precipitation tank, BAF BAF, sterilization pool.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610510425.6A CN106430562B (en) | 2014-08-25 | 2014-08-25 | A kind of processing method of poultry discharged wastewater met the national standard |
| CN201610511663.9A CN106430563A (en) | 2014-08-25 | 2014-08-25 | Treatment system and treatment method for up-to-standard discharge of livestock and poultry wastewater |
| CN201410421528.6A CN104291517B (en) | 2014-08-25 | 2014-08-25 | The processing system of a kind of waste water of livestock poultry qualified discharge and processing method |
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| CN201410421528.6A CN104291517B (en) | 2014-08-25 | 2014-08-25 | The processing system of a kind of waste water of livestock poultry qualified discharge and processing method |
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| CN201610511663.9A Division CN106430563A (en) | 2014-08-25 | 2014-08-25 | Treatment system and treatment method for up-to-standard discharge of livestock and poultry wastewater |
| CN201610510425.6A Division CN106430562B (en) | 2014-08-25 | 2014-08-25 | A kind of processing method of poultry discharged wastewater met the national standard |
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| CN201410421528.6A Active CN104291517B (en) | 2014-08-25 | 2014-08-25 | The processing system of a kind of waste water of livestock poultry qualified discharge and processing method |
| CN201610510425.6A Active CN106430562B (en) | 2014-08-25 | 2014-08-25 | A kind of processing method of poultry discharged wastewater met the national standard |
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Cited By (9)
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| CN105384302A (en) * | 2015-09-16 | 2016-03-09 | 徐雪祥 | Aquaculture wastewater processing system and method thereof |
| CN106082531A (en) * | 2016-06-21 | 2016-11-09 | 福建禹环境科技有限公司 | A kind of processing method of breeding wastewater |
| CN106348486A (en) * | 2016-08-24 | 2017-01-25 | 江苏众胜灭菌设备科技有限公司 | Method for recovering nitrogenous raw materials in sewage |
| CN106430563A (en) * | 2014-08-25 | 2017-02-22 | 杭州清城能源环保工程有限公司 | Treatment system and treatment method for up-to-standard discharge of livestock and poultry wastewater |
| CN107082535A (en) * | 2017-05-31 | 2017-08-22 | 安徽永志环能科技有限公司 | Livestock and poultry cultivation night soil biological treatment utilization process |
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| CN110183032A (en) * | 2019-04-23 | 2019-08-30 | 长沙凯天工研院环保服务有限公司 | A kind of livestock breeding wastewater recycling treatment system |
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| CN108640453A (en) * | 2018-05-09 | 2018-10-12 | 惠州市百欧佳科技有限公司 | A kind of simultaneous water quality reaching standard process of poultry waste nutrient recycling |
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| CN115304220A (en) * | 2022-08-22 | 2022-11-08 | 湖南瑞民博环境工程有限公司 | Breeding wastewater treatment system and treatment method thereof |
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| CN106430563A (en) * | 2014-08-25 | 2017-02-22 | 杭州清城能源环保工程有限公司 | Treatment system and treatment method for up-to-standard discharge of livestock and poultry wastewater |
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| CN106082531A (en) * | 2016-06-21 | 2016-11-09 | 福建禹环境科技有限公司 | A kind of processing method of breeding wastewater |
| CN106348486A (en) * | 2016-08-24 | 2017-01-25 | 江苏众胜灭菌设备科技有限公司 | Method for recovering nitrogenous raw materials in sewage |
| CN107082535A (en) * | 2017-05-31 | 2017-08-22 | 安徽永志环能科技有限公司 | Livestock and poultry cultivation night soil biological treatment utilization process |
| CN108862860A (en) * | 2018-07-09 | 2018-11-23 | 许春燕 | A kind of sewage-treatment plant of Automatic Control |
| CN108821521A (en) * | 2018-08-23 | 2018-11-16 | 温州正城建设有限公司 | Multistage settling gardens regeneration effluent system |
| CN110183032A (en) * | 2019-04-23 | 2019-08-30 | 长沙凯天工研院环保服务有限公司 | A kind of livestock breeding wastewater recycling treatment system |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104291517B (en) | 2016-09-28 |
| CN106430562B (en) | 2019-10-01 |
| CN106430562A (en) | 2017-02-22 |
| CN106430563A (en) | 2017-02-22 |
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