CN105174617A - Wastewater advanced treatment system of large-scale pig farm - Google Patents
Wastewater advanced treatment system of large-scale pig farm Download PDFInfo
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- CN105174617A CN105174617A CN201510578189.7A CN201510578189A CN105174617A CN 105174617 A CN105174617 A CN 105174617A CN 201510578189 A CN201510578189 A CN 201510578189A CN 105174617 A CN105174617 A CN 105174617A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 52
- 239000010802 sludge Substances 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 239000012528 membrane Substances 0.000 claims abstract description 22
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 11
- 238000009395 breeding Methods 0.000 claims abstract description 10
- 230000001488 breeding effect Effects 0.000 claims abstract description 10
- 244000144972 livestock Species 0.000 claims abstract description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 9
- 231100000719 pollutant Toxicity 0.000 claims abstract description 9
- 244000144977 poultry Species 0.000 claims abstract description 9
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 52
- 238000000034 method Methods 0.000 claims description 28
- 230000008569 process Effects 0.000 claims description 28
- 239000002699 waste material Substances 0.000 claims description 20
- 230000001954 sterilising effect Effects 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 230000008093 supporting effect Effects 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000007790 solid phase Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000005189 flocculation Methods 0.000 claims description 5
- 230000016615 flocculation Effects 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 238000011001 backwashing Methods 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 claims description 4
- 238000006731 degradation reaction Methods 0.000 claims description 4
- 239000000645 desinfectant Substances 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 241000894006 Bacteria Species 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 244000005700 microbiome Species 0.000 claims description 3
- 230000001546 nitrifying effect Effects 0.000 claims description 3
- 239000012071 phase Substances 0.000 claims description 3
- -1 process respectively Substances 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 2
- 241000282898 Sus scrofa Species 0.000 abstract 2
- 239000000356 contaminant Substances 0.000 abstract 2
- 238000005188 flotation Methods 0.000 abstract 2
- 230000000295 complement effect Effects 0.000 abstract 1
- 230000000249 desinfective effect Effects 0.000 abstract 1
- 230000000813 microbial effect Effects 0.000 abstract 1
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 241000282887 Suidae Species 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000003851 biochemical process Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 208000030852 Parasitic disease Diseases 0.000 description 1
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Abstract
The invention relates to a wastewater advanced treatment system of a large-scale pig farm, in particular to an integrated equipment system of breeding industry wastewater treatment. The wastewater advanced treatment system consists of a solid-liquid separator, an upflow anaerobic sludge blanket reactor, an air flotation device, a membrane bioreactor and a disinfecting tank which are communicated in sequence; contaminants with big particles of swine wastewater are separated firstly through the wastewater advanced treatment system, and then most of organic contaminants are fermented and degraded into methane, so that a COD value representing the organic content in wastewater is remarkably reduced; dephosphorization, denitrification and removal of organic substances are performed by a flocculant and an air flotation effect of dissolved bubbles; then reduction of ammonia nitrogen and dephosphorization are further performed through nitrification of microbial flora of the membrane bioreactor, fine interception is performed, so that emersed suspended solids and turbidity are close to zero, finally, the disinfection treatment is performed by a common sanitizer, and the requirement of the pollutant discharge standard of livestock and poultry breeding industry- -GB15896-2001 and a goal of resourcezation of waste water are achieved. The wastewater advanced treatment system provided by the invention is scientific in combination, all processing unites are coordinating and complementary, and the wastewater treatment efficiency is comprehensively improved.
Description
Technical field
Large-scale pig farm advanced waste treatment system of the present invention, belongs to wastewater treatment equipment field, the comprehensive equipment system of particularly aquaculture wastewater treatment.
Background technology
China is cultivation big country; nearly decades improve constantly along with living standards of the people; the development of China's livestock industry is rapid; industry of wherein raising pigs is mass-producing, intensive future development in scale generally; this also just causes its pollutent produced to discharge in the mode of Relatively centralized; and far beyond the natural supporting capacity of local environment, and then also cause serious pollution by environment.Show according to correlative study, the flushing waste water that the waste water of discharge of raising pigs urinates (excrement) and pig house primarily of pig is formed, and in waste water, COD is up to 4500 ~ 20000mg/L, TN550 ~ 2100mg/L, NH
4 +-N450 ~ 1500mg/L, TP100 ~ 330mg/L, visible piggery wastewater belongs to high concentrated organic wastewater, the content also severe overweight of its nitrogen phosphorus.If piggery wastewater directly enters environment without effective process, severe contamination can be formed to surface water, underground water, farmland and atmospheric environment, cause body eutrophication, also can cause spreading of parasitosis.In order to administer Pig raising wastewater, biochemical process process Pig raising wastewater is utilized to obtain general application.The single biochemical process treatment technology that current livestock and poultry breeding industry adopts, and be not exclusively applicable to the improvement of the scale Pig raising wastewater of high organism and high nitrogen and phosphorus content.And it is high to there is energy consumption, the problem that processing cost is high.
For the treatment process of the upflow anaerobic sludge blanket process recently proposed (UASB)+sequencing batch active sludge (SBR), its advantage effectively to remove partial organic substances and most ammonia-nitrogen in Pig raising wastewater, but the total phosphorus of water outlet exceeds standard, and the concentration of suspended substance is higher in waste water, affect effluent quality, also need separately to add the process of a set of chemical coagulation reaction tank, to meet qualified discharge requirement, and waste water is 40h at the hydraulic detention time of SBR, the longer residence time makes the plant area area of wastewater treatment greatly increase, also the investment cost of processing item is increased further.
In brief, the effect of domestic and international Pig raising wastewater process is all not ideal enough: or treatment effect is not good, does not reach emission standard, or cost is high, investment large, is difficult to carry out.In order to meet the needs of environment protection and sustainable economic development, the process problem effectively solving large scale of pig farm waste water is more and more urgent.
Summary of the invention
The object of the invention is to propose a kind of Large-scale pig farm advanced waste treatment system; by the scientific combination for the treatment of unit; high strength ammonia nitrogen organic in effective treatment scale Wastewater from Pig Farm; remove the content of nitrogen and phosphorous in waste water, make the waste water of Large-scale pig farm reach " livestock and poultry breeding industry pollutant emission standard " (GB15896-2001) requirement.
Realizing technical scheme of the present invention is:
Large-scale pig farm advanced waste treatment system of the present invention, be made up of solid-liquid separator, up flow anaerobic sludge blanket reactor, Air-float separator, membrane bioreactor and sterilization pool, described solid-liquid separator, up flow anaerobic sludge blanket reactor, Air-float separator, membrane bioreactor and sterilization pool UNICOM successively; First Pig raising wastewater is separated by solid-liquid separator and removes macrobead pollutent and floating matter, reduces particle suspensions in waste water; The water outlet water inlet bottom up flow anaerobic sludge blanket reactor be separated through solid-liquid separator enters, from bottom to top by the anerobe process of up flow anaerobic sludge blanket reactor, most organic dirt fermentative degradation is biogas, the COD value characterizing organic content in waste water significantly declines, and particle suspensions synchronously reduces; Enter air-dissolving air-float device by the water outlet of up flow anaerobic sludge blanket reactor process, this water is by the air supporting effect of the flocculation agent in air-dissolving air-float device and molten bubble, and dephosphorization, denitrogenation, separation organics removal, reduce COD and BOD in this water further
5; Then, membrane bioreactor is entered by the water outlet of air-dissolving air-float device process, this water, in membrane bioreactor, by the nitrification of nitrifying microorganisms bacterium, reduces ammonia nitrogen and dephosphorization further, and through meticulously to retain, solid-liquid separation, make the suspended substance of water outlet and turbidity close to zero, finally, sterilization pool is sent in this water outlet, after being disinfected by general disinfectants, namely reach " livestock and poultry breeding industry pollutant emission standard " (GB15896-2001) requirement.
Described solid-liquid separator adopts current high speed rotating mechanism, by the difference of material density, and effective separating particles suspended substance.
Be provided with gas phase, solid phase, liquid phase separator in described up flow anaerobic sludge blanket reactor, after correspondence offers degraded gas, solid phase sludge, process respectively, water body exports.
The molten gas air pressure of described air-dissolving air-float device is 0.4MPa, and dissolved air water pressure is 0.35MPa, and two pressure differences are 0.05MPa.
The water yield of described air-dissolving air-float device 35% is circulated to up flow anaerobic sludge blanket reactor.
The described qualified discharge water through sterilization pool process, part feedback is used as the backwashing water of membrane biological reaction.
The invention described above Large-scale pig farm advanced waste treatment system, is supportingly provided with methane recovery system, reclaims the biogas produced by up flow anaerobic sludge blanket reactor treating processes.
The invention described above Large-scale pig farm advanced waste treatment system, is supportingly provided with solid state dirt disposal system, and this solid state dirt disposal system comprises transferpump, solid state dirt mummifying pool, mud collecting tank, sludge concentrating pot, plate-and-frame filter press.
The invention has the advantages that:
Large-scale pig farm advanced waste treatment system of the present invention, be made up of solid-liquid separator, up flow anaerobic sludge blanket reactor, Air-float separator, membrane bioreactor and sterilization pool, the present invention first by solid-liquid separator to macrobead pollutent in waste water and floating matter sharp separation; In up flow anaerobic sludge blanket reactor, by anerobe process, most organic dirt fermentative degradation is biogas, the COD value characterizing organic content in waste water significantly declines, particle suspensions reduces, and while carrying out biochemical reaction, also reduce further the content of suspended substance and other foreign ions in waste water; At Air-float separator processing unit, by the air supporting effect of flocculation agent and molten bubble, dephosphorization, denitrogenation, reduce COD and BOD in this water further
5; In membrane bioreactor, due to the effect of nitrifier, effectively reduce content and the dephosphorization of ammonia nitrogen in waste water further, and through meticulously to retain, solid-liquid separation, make the suspended substance of water outlet and turbidity close to zero, finally, disinfected by general disinfectants, namely reach " livestock and poultry breeding industry pollutant emission standard " (GB15896-2001) requirement.Large-scale pig farm advanced waste treatment system of the present invention; it combines science; each processing unit harmonizing; improve waste water treatment efficiency comprehensively; the floor space reduction of overall change system; the biogas reclaimed is recycling; the difficult problem that adequate solution piggery wastewater Pollutant levels are high and pig industry profit is low; reduce wastewater treatment energy consumption and system cloud gray model expense; achieve the advanced treatment to scale Pig raising wastewater, reach " livestock and poultry breeding industry pollutant emission standard " (GB15896-2001) and require and waste water reclaiming target.
Accompanying drawing explanation
Fig. 1 is Large-scale pig farm advanced waste treatment system schematic diagram of the present invention.
Embodiment
Now further illustrate the present invention by reference to the accompanying drawings how to implement:
Large-scale pig farm advanced waste treatment system of the present invention, be made up of solid-liquid separator, up flow anaerobic sludge blanket reactor, Air-float separator, membrane bioreactor and sterilization pool, described solid-liquid separator, up flow anaerobic sludge blanket reactor, Air-float separator, membrane bioreactor and sterilization pool are successively by transferpump UNICOM; First Pig raising wastewater is processed by 0.5-1 hour at solid-liquid separator, is separated and removes macrobead pollutent and floating matter, reduces particle suspensions in waste water; The water outlet water inlet bottom up flow anaerobic sludge blanket reactor be separated through solid-liquid separator enters, this water is from bottom to top by anerobe process in up flow anaerobic sludge blanket reactor 8-12 hour, most organic dirt fermentative degradation is biogas, the COD value characterizing organic content in waste water significantly declines, and particle suspensions synchronously reduces; Air-dissolving air-float device is entered by the water outlet of up flow anaerobic sludge blanket reactor process, this water stops 1-3 hour in air-dissolving air-float device, in this air-dissolving air-float device, select polymerize aluminum chloride (PAC) as flocculation agent, guarantee that in waste water, the concentration that adds of polymerize aluminum chloride is 1 ~ 10mg/L, select polyacrylamide (PAM) to be coagulant aids simultaneously, adopt mechanical stirring, by the throwing out of flocculation agent and the air supporting effect of molten bubble, dephosphorization, denitrogenation, COD and BOD in a step-down of going forward side by side this water low
5; Then, membrane bioreactor is entered by the water outlet of air-dissolving air-float device process, this water stops 8-12 hour in membrane bioreactor, by the nitrification of nitrifying microorganisms bacterium, significantly reduce content and the dephosphorization of ammonia nitrogen in waste water further, and through meticulously to retain, solid-liquid separation, make the suspended substance of water outlet and turbidity close to zero, finally, sterilization pool is sent in this water outlet, disinfect 45-90 minute by general disinfectants, namely reach " livestock and poultry breeding industry pollutant emission standard " (GB15896-2001) requirement.
Described solid-liquid separator adopts current high speed rotating mechanism, by the difference of material density, and effective separating particles suspended substance.
Be provided with gas phase, solid phase, liquid phase separator in described up flow anaerobic sludge blanket reactor, and after correspondence offers degraded gas, solid phase sludge, process respectively, water body exports.
The molten gas air pressure of described air-dissolving air-float device is 0.4MPa, and dissolved air water pressure is 0.35MPa, and two pressure differences are 0.05MPa.
The water yield of described air-dissolving air-float device 35% is circulated to up flow anaerobic sludge blanket reactor.
The described qualified discharge water through sterilization pool process, part feedback is used as the backwashing water of membrane biological reaction.
The invention described above Large-scale pig farm advanced waste treatment system, is supportingly provided with methane recovery system, reclaims the biogas produced by up flow anaerobic sludge blanket reactor treating processes.
The invention described above Large-scale pig farm advanced waste treatment system, is supportingly provided with solid state dirt disposal system, this solid state dirt disposal system, comprises transferpump, solid state dirt mummifying pool, mud collecting tank, sludge concentrating pot, plate-and-frame filter press.
Application example:
The present invention is used for certain Large-scale pig farm, and produce pig 10,000 per year, sow 500, the water yield is 150m
3/ d, raw water quality is COD5000 ~ 8000mg/L, NH
4 +-N500 ~ 1200mg/L, TP100 ~ 180mg/L, suspended substance 600 ~ 650mg/L, BOD
5750 ~ 800mg/L.
First waste water enter solid-liquid separation, and in solid-liquid separation, waste water stops 45 minutes; Water outlet is from bottom to top by upflow anaerobic sludge blanket process (UASB), and waste water reacts 10 hours in this reaction vessel; Then air-dissolving air-float device is entered, polymerize aluminum chloride (PAC) and polyacrylamide (PAM) will be added in air-dissolving air-float, add concentration and be respectively 5mg/L and 0.5 μ g/L, and adopt mechanical stirring coagulation, waste water residence time in air supporting reactor is 1.5 hours; Send into membrane biological reaction, waste water stops 8 hours in membrane bioreactor; The residence time of last waste water waste water in sterilization pool is 45 minutes.Outer draining is through measuring, and in waste water, water-quality guideline is as table 1.Assay shows, and treatment effect is good, and water quality after treatment can reach country " livestock and poultry breeding industry pollutant emission standard " (GB18596-2001) and arrange outward, and wherein the outer draining of a part is using the backwashing water reuse as membrane bioreactor.
In the above-described example, the biogas that the present invention produces, is utilized by methane recovery system recoveries; The solid state dirt produced, is disposed by the solid state dirt disposal system of supporting setting.
Table 1
| Sample number into spectrum | COD(mg/l) | Ammonia nitrogen (mg/l) | Total phosphorus (mg/l) | SS(mg/l) | BOD 5(mg/l) |
| Waste water before process | 5000～8000 | 500～1200 | 100～180 | 600～650 | 750～800 |
| Outer row's mouth | 312 | 58 | 3.0 | 56 | 85 |
| National standard | ≤400 | ≤80 | ≤8.0 | ≤200 | ≤150 |
Claims (8)
1. Large-scale pig farm advanced waste treatment system, it is characterized in that, be made up of solid-liquid separator, up flow anaerobic sludge blanket reactor, Air-float separator, membrane bioreactor and sterilization pool, described solid-liquid separator, up flow anaerobic sludge blanket reactor, Air-float separator, membrane bioreactor and sterilization pool UNICOM successively; First Pig raising wastewater is separated by solid-liquid separator and removes macrobead pollutent and floating matter, reduces particle suspensions in waste water; The water outlet water inlet bottom up flow anaerobic sludge blanket reactor be separated through solid-liquid separator enters, from bottom to top by the anerobe process of up flow anaerobic sludge blanket reactor, most organic dirt fermentative degradation is biogas, the COD value characterizing organic content in waste water significantly declines, and particle suspensions synchronously reduces; Enter air-dissolving air-float device by the water outlet of up flow anaerobic sludge blanket reactor process, this water is by the air supporting effect of the flocculation agent in air-dissolving air-float device and molten bubble, and dephosphorization, denitrogenation, separation organics removal, reduce COD and BOD in this water further
5; Then, membrane bioreactor is entered by the water outlet of air-dissolving air-float device process, this water, in membrane bioreactor, by the nitrification of nitrifying microorganisms bacterium, reduces ammonia nitrogen and dephosphorization further, and through meticulously to retain, solid-liquid separation, make the suspended substance of water outlet and turbidity close to zero, finally, sterilization pool is sent in this water outlet, after being disinfected by general disinfectants, namely reach " livestock and poultry breeding industry pollutant emission standard " (GB15896-2001) requirement.
2. Large-scale pig farm advanced waste treatment system according to claim 1, is characterized in that, solid-liquid separator adopts current high speed rotating mechanism, by the difference of material density, and effective separating particles suspended substance.
3. Large-scale pig farm advanced waste treatment system according to claim 1; it is characterized in that; be provided with gas phase, solid phase, liquid phase separator in up flow anaerobic sludge blanket reactor, after correspondence offers degraded gas, solid phase sludge, process respectively, water body exports.
4. Large-scale pig farm advanced waste treatment system according to claim 1, is characterized in that, the molten gas air pressure of air-dissolving air-float device is 0.4MPa, and dissolved air water pressure is 0.35MPa, and two pressure differences are 0.05MPa.
5. Large-scale pig farm advanced waste treatment system according to claim 1, is characterized in that, the water yield of air-dissolving air-float device 35% is circulated to up flow anaerobic sludge blanket reactor.
6. Large-scale pig farm advanced waste treatment system according to claim 1, is characterized in that, through the qualified discharge water of sterilization pool process, part feedback is used as the backwashing water of membrane biological reaction.
7. Large-scale pig farm advanced waste treatment system according to claim 1, is characterized in that, is supportingly provided with methane recovery system, reclaims the biogas produced by up flow anaerobic sludge blanket reactor treating processes.
8. Large-scale pig farm advanced waste treatment system according to claim 1; it is characterized in that; supportingly be provided with solid state dirt disposal system, this solid state dirt disposal system comprises transferpump, solid state dirt mummifying pool, mud collecting tank, sludge concentrating pot, plate-and-frame filter press.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510578189.7A CN105174617A (en) | 2015-09-11 | 2015-09-11 | Wastewater advanced treatment system of large-scale pig farm |
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ID=54897156
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106589004A (en) * | 2016-10-12 | 2017-04-26 | 环境保护部华南环境科学研究所 | Treating method for pig manure |
| CN107840528A (en) * | 2017-06-16 | 2018-03-27 | 汕尾市现代畜牧产业研究院 | A kind of scale piggery waste processing and the method for recycling |
| CN108726796A (en) * | 2018-05-30 | 2018-11-02 | 甘肃前进牧业科技有限责任公司 | A kind of processing method of milk cattle cultivating waste water |
| CN110369460A (en) * | 2019-08-07 | 2019-10-25 | 徐州国鼎盛和环境科技有限公司 | A kind of remaining meal rubbish treatment plant energy green circulating treating system |
| CN110436702A (en) * | 2019-07-18 | 2019-11-12 | 海南晟泰环保工程有限公司 | A kind of livestock and poultry cultivation sewage zero-discharge group technology |
| CN111153552A (en) * | 2020-01-10 | 2020-05-15 | 重庆工业职业技术学院 | Breeding sewage treatment device |
| CN113003867A (en) * | 2021-03-04 | 2021-06-22 | 萍乡市泰华牧业科技有限公司 | Method for improving separation efficiency of pig farm breeding wastewater |
| CN115367870A (en) * | 2022-08-26 | 2022-11-22 | 上海中耀环保实业有限公司 | UASB coupling air-flotation anaerobic sewage treatment system and method |
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| CN106589004A (en) * | 2016-10-12 | 2017-04-26 | 环境保护部华南环境科学研究所 | Treating method for pig manure |
| CN107840528A (en) * | 2017-06-16 | 2018-03-27 | 汕尾市现代畜牧产业研究院 | A kind of scale piggery waste processing and the method for recycling |
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| CN113003867A (en) * | 2021-03-04 | 2021-06-22 | 萍乡市泰华牧业科技有限公司 | Method for improving separation efficiency of pig farm breeding wastewater |
| CN115367870A (en) * | 2022-08-26 | 2022-11-22 | 上海中耀环保实业有限公司 | UASB coupling air-flotation anaerobic sewage treatment system and method |
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