CN111547951A - Method for treating wastewater of breeding pigs - Google Patents
Method for treating wastewater of breeding pigs Download PDFInfo
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- CN111547951A CN111547951A CN202010431479.XA CN202010431479A CN111547951A CN 111547951 A CN111547951 A CN 111547951A CN 202010431479 A CN202010431479 A CN 202010431479A CN 111547951 A CN111547951 A CN 111547951A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000002351 wastewater Substances 0.000 title claims abstract description 32
- 238000009395 breeding Methods 0.000 title claims abstract description 26
- 230000001488 breeding effect Effects 0.000 title claims abstract description 26
- 241000282887 Suidae Species 0.000 title claims abstract description 18
- 239000010865 sewage Substances 0.000 claims abstract description 83
- 210000003608 fece Anatomy 0.000 claims abstract description 40
- 239000010871 livestock manure Substances 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000004062 sedimentation Methods 0.000 claims abstract description 14
- 230000015556 catabolic process Effects 0.000 claims abstract description 13
- 238000006731 degradation reaction Methods 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 13
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 9
- 210000002700 urine Anatomy 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 238000012216 screening Methods 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 24
- 239000010802 sludge Substances 0.000 claims description 15
- 244000005700 microbiome Species 0.000 claims description 13
- 238000005273 aeration Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000000855 fermentation Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 11
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- 239000011574 phosphorus Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 230000002503 metabolic effect Effects 0.000 claims description 5
- 238000009264 composting Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 230000009615 deamination Effects 0.000 claims description 4
- 238000006481 deamination reaction Methods 0.000 claims description 4
- 239000003337 fertilizer Substances 0.000 claims description 4
- 238000005189 flocculation Methods 0.000 claims description 4
- 230000016615 flocculation Effects 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000000593 degrading effect Effects 0.000 claims description 3
- 230000002550 fecal effect Effects 0.000 claims description 3
- 230000004151 fermentation Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000004332 deodorization Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007269 microbial metabolism Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- -1 contains carbon Chemical compound 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 235000015277 pork Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/01—Removal of dung or urine, e.g. from stables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- 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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- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C02F2209/14—NH3-N
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- C02F3/30—Aerobic and anaerobic processes
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Abstract
The invention discloses a method for treating wastewater from pig breeding, which comprises the following steps: s1, manually cleaning manure, manually conveying the pig manure in the pig house into a treatment plant, then washing the pig house through clear water, washing pig urine and solid matters in the pig house into a blow-off pipe, screening out hair and manure residues in sewage through a grid, centrifuging through a horizontal centrifuge, finally filtering to enter a primary sedimentation tank, settling out fine suspended matters, adding a certain amount of flocculant again, and directly conveying the manure residues and the manually conveyed manure residues in the pig house into a septic tank; the invention relates to the technical field of wastewater treatment. The method for treating the wastewater of the breeding pigs can treat odor generated in the process of treating the sewage of the breeding pigs to a certain extent by adopting modes such as microbial metabolism degradation and the like, greatly improves the integral deodorization effect, avoids the harm of the odor to the surrounding environment and residents, and has simple operation of the deodorization process.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method for treating wastewater of breeding pigs.
Background
The wastewater treatment is to treat the wastewater by physical, chemical and biological methods, so that the wastewater is purified, the pollution is reduced, the wastewater is recycled and reused, and water resources are fully utilized. The process of separating pollutants from the wastewater or converting the pollutants into harmless substances is very common in China, the national demand for pork is very large, a large amount of wastewater can be generated in the process of pig breeding, and the wastewater in a pig farm mainly comes from pig manure, pig urine and washing water in the breeding farm. The sewage is rich in nitrogen and phosphorus, organic matters and high suspended matters, is high-concentration organic wastewater, and the existing pig breeding wastewater treatment method is relatively mature, but pig breeding wastewater and excrement can generate a large amount of odor, so that the surrounding environment is greatly damaged, and the method also has certain harm to surrounding residents, and can cause great influence if the odor generated by pig breeding wastewater is not treated.
Traditional breed pig wastewater treatment method can not carry out certain processing to the foul smell that produces breeding pig sewage treatment's in-process, can not handle through modes such as microbial metabolism degradation, greatly reduced holistic deodorization effect, the foul smell causes harm easily to surrounding environment and resident, and deodorization process complex operation, and treatment cost is high, can not in time classify waste water and solid excrement and urine, can not reach the standard through handling the process separately, waste water causes the pollution to the environment easily.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for treating wastewater of breeding pigs, which solves the problem that the method for treating wastewater of breeding pigs cannot treat odor generated by the wastewater.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for treating wastewater of breeding pigs comprises the following steps:
s1, manually cleaning manure, manually conveying the pig manure in the pig house into a treatment plant, then washing the pig house through clear water, washing pig urine and solid matters in the pig house into a blow-off pipe, screening out hair and manure residues in sewage through a grid, centrifuging through a horizontal centrifuge, finally filtering to enter a primary sedimentation tank, settling out fine suspended matters, adding a certain amount of flocculant again, and directly conveying the manure residues and the manually conveyed manure residues in the pig house into a septic tank;
s2, absorbing odor generated by the septic tank through an air-induced pipeline system, adding a certain amount of active carbon into the sewage subjected to flocculation treatment, absorbing the generated odor through the air-induced pipeline system, and then discharging the absorbed odor after metabolic degradation through a biological filter membrane and microorganisms;
s3, lifting the flocculated sewage by a pump, then feeding the sewage into a baffled anaerobic reaction tank, carrying out primary biochemical treatment, drying the precipitated sludge by a sludge drying tank, sending the dried sludge to a composting yard, accumulating and fermenting the manure together with artificially cleaned manure to be used as a compound fertilizer, after the sewage is treated by the baffled anaerobic tank, degrading COD and BOD of the manure sewage by more than 80%, feeding the sewage into a stream oxidation ditch through an intermediate regulating tank, carrying out aerobic advanced treatment, and further carrying out dephosphorization and deamination treatment on the sewage, wherein the removal rate of main degradation indexes of COD, BOD and NH3-N can exceed 97%;
s4, enabling the processed sewage to flow into a reaction tank, adjusting the pH value of the sewage to 8-9 by adding alkali, enabling ammonia nitrogen in the sewage to exist mainly in a free state under an alkaline condition, then enabling the processed sewage to flow into a shallow aeration tank, wherein an aeration device is installed in the shallow aeration tank, blowing the free ammonia nitrogen out of the sewage by the aeration device to greatly reduce the content of the ammonia nitrogen, then enabling the aerated sewage to flow into a sedimentation tank, adding a phosphorus removal agent into the sedimentation tank, precipitating the sewage in the sedimentation tank after the reaction, and discharging sludge to achieve the purpose of removing total phosphorus in the sewage;
s5, adding a certain amount of microorganisms into the solid excrement in the excrement stacking tank, carrying out anaerobic fermentation after the excrement stacking tank is sealed, determining the anaerobic fermentation time according to the excrement amount, taking out the materials, drying the materials, and then making the dried materials into waste materials through a granulator.
Preferably, in S1, when the feces are washed with clean water, the amount of water is controlled to reduce the amount of water as much as possible.
Preferably, in S2, the activated carbon is granulated into granules of 2 cm or less, and then the amount of the activated carbon is determined according to the actual amount of the sewage, and the activated carbon is replaced at regular time, and the adsorbed saturated activated carbon is treated.
Preferably, in S3, when the baffled anaerobic tank is used for treating sewage, it is necessary to ensure the tightness of the baffled anaerobic tank so as to prevent a large amount of microorganisms in the air from entering the baffled anaerobic tank.
Preferably, in S5, the anaerobic fermentation time of the manure is determined according to the amount of the manure, generally about 30 days, and after the manure fermentation in the manure storage tank is completed, the gas needs to be discharged first to prevent accidents.
Preferably, before fecal sewage handles, need carry out the processing of keeping in to sewage, the processing waste water that has handled flows into first catch basin, the pig farm sewage of keeping in.
(III) advantageous effects
The invention provides a method for treating wastewater of breeding pigs. The method has the following beneficial effects:
(1) according to the method for treating the waste water of the breeding pigs, the pig manure in the pig house is manually conveyed into a treatment site through S1, then the pig house is washed through clear water, some pig urine and solid matters in the pig house are washed to a sewage discharge pipe, hair and excrement residues in sewage are firstly screened out through a grid, then the hair and the excrement residues are centrifuged through a horizontal centrifuge, finally the pig manure enters a primary sedimentation tank through filtration, fine suspended matters are settled out, a certain amount of flocculating agent is added again, and the excrement residues manually conveyed in the pig house are directly conveyed to a septic tank; s2, absorbing odor generated by the septic tank through an air-induced pipeline system, adding a certain amount of active carbon into the sewage subjected to flocculation treatment, absorbing the generated odor through the air-induced pipeline system, and then discharging the absorbed odor after metabolic degradation through a biological filter membrane and microorganisms; can carry out certain processing at the foul smell that produces the in-process of breeding pig sewage treatment, adopt modes such as microorganism metabolism degradation to handle, improve holistic deodorization effect greatly, avoid the harm that the foul smell led to the fact to surrounding environment and resident, and deodorization process easy operation, the treatment cost is low.
(2) The method for treating the wastewater of the cultivated pigs comprises the steps of S3, lifting flocculated sewage by a pump, feeding the sewage into a baffling type anaerobic reaction tank, carrying out primary biochemical treatment, drying precipitated sludge by a sludge drying tank, feeding the dried sludge into a composting yard, accumulating and fermenting the manure together with artificially removed excrement to be used as a compound fertilizer, wherein after the sewage is treated by the baffling type anaerobic reaction tank, COD and BOD degradation of the sewage can reach more than 80%, feeding the sewage into a stream oxidation ditch through an intermediate regulating tank for aerobic advanced treatment, and further carrying out dephosphorization and deamination treatment on the sewage, wherein the removal rate of main degradation COD index, BOD and NH3-N can exceed 97%; can classify the waste water and the solid excrement in time, and reach the standard through respective treatment processes, thereby avoiding the pollution of the waste water to the environment.
Drawings
FIG. 1 is a flow chart of the treatment method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a technical solution: a method for treating wastewater of breeding pigs comprises the following steps:
s1, manually cleaning manure, conveying the pig manure in the pig house into a treatment plant by manual cleaning, washing the pig house by clean water, washing pig urine and solid matters in the pig house into a blow-off pipe, screening hair and manure residues in sewage by a grid, centrifuging by a horizontal centrifuge, filtering, conveying into a primary sedimentation tank, settling fine suspended matters, adding a certain amount of flocculant again, flocculating large granular matters in the sewage by the flocculant, further reducing impurities in the sewage, better treating the sewage, and directly conveying the manure and the manure residues manually conveyed in the pig house into a septic tank;
s2, absorbing odor generated by the septic tank through an air inducing pipeline system, adding a certain amount of active carbon into the sewage after flocculation treatment, wherein the active carbon is black porous solid carbon, mainly contains carbon, a small amount of elements such as oxygen, hydrogen, sulfur, nitrogen, chlorine and the like, has strong adsorption performance, is an industrial adsorbent with extremely wide application, can adsorb odor molecules generated in the sewage to a certain extent, reduces the degree of odor, absorbs the generated odor through the air inducing pipeline system, then carries out metabolic degradation on the absorbed odor through a biological filter membrane and microorganisms, and then carries out reaction with the odor through the microorganisms during metabolic degradation of the microorganisms;
s3, lifting the flocculated sewage by a pump, then feeding the sewage into a baffled anaerobic reaction tank, carrying out primary biochemical treatment, drying the precipitated sludge by a sludge drying tank, sending the dried sludge to a composting yard, accumulating and fermenting the manure together with artificially cleaned manure to be used as a compound fertilizer, after the sewage is treated by the baffled anaerobic tank, degrading COD and BOD of the manure sewage by more than 80%, feeding the sewage into a stream oxidation ditch through an intermediate regulating tank, carrying out aerobic advanced treatment, and further carrying out dephosphorization and deamination treatment on the sewage, wherein the removal rate of main degradation indexes of COD, BOD and NH3-N can exceed 97%;
s4, enabling the processed sewage to flow into a reaction tank, adjusting the pH value of the sewage to 8-9 by adding alkali, enabling ammonia nitrogen in the sewage to exist mainly in a free state under an alkaline condition, then enabling the processed sewage to flow into a shallow aeration tank, wherein an aeration device is installed in the shallow aeration tank, blowing the free ammonia nitrogen out of the sewage by the aeration device to greatly reduce the content of the ammonia nitrogen, then enabling the aerated sewage to flow into a sedimentation tank, adding a phosphorus removal agent into the sedimentation tank, precipitating the sewage in the sedimentation tank after the reaction, and discharging sludge to achieve the purpose of removing total phosphorus in the sewage;
s5, adding a certain amount of microorganisms into the solid excrement in the excrement stacking tank, carrying out anaerobic fermentation after the excrement stacking tank is sealed, determining the anaerobic fermentation time according to the excrement amount, taking out the materials, drying the materials, and then making the dried materials into waste materials through a granulator.
In the present invention, in S1, when the feces are washed with clean water, the amount of water is controlled to reduce the amount of water as much as possible, and if the amount of water is too large, the amount of sewage increases as a whole, and the burden of sewage treatment is increased.
In the invention, in S2, the activated carbon is required to be prepared into granules with the diameter less than 2 cm, then the dosage is determined according to the actual amount of the sewage, the activated carbon is replaced at regular time, and the adsorbed saturated activated carbon is treated.
In the invention, in S3, when the baffled anaerobic tank is used to treat sewage, it is necessary to ensure the tightness of the baffled anaerobic tank and prevent a large amount of microorganisms in the air from entering the baffled anaerobic tank.
In the invention, in S5, the anaerobic fermentation time of the excrement is determined according to the excrement amount, generally about 30 days, and after the excrement fermentation in the septic tank is finished, the gas needs to be discharged firstly to prevent accidents.
In the invention, before fecal sewage treatment, temporary storage treatment needs to be carried out on sewage, and the treated processing wastewater flows into the first water collecting tank for temporary storage of the sewage of the pig farm.
In conclusion, the wastewater treatment method disclosed by the invention is used for treating the wastewater and the solid excrement in the pig breeding process in a classified manner, and collecting and treating odor generated by the wastewater and the solid excrement in a concentrated manner, so that the harm of the odor to the environment and residents is avoided.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A method for treating wastewater of breeding pigs is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, manually cleaning manure, manually conveying the pig manure in the pig house into a treatment plant, then washing the pig house through clear water, washing pig urine and solid matters in the pig house into a blow-off pipe, screening out hair and manure residues in sewage through a grid, centrifuging through a horizontal centrifuge, finally filtering to enter a primary sedimentation tank, settling out fine suspended matters, adding a certain amount of flocculant again, and directly conveying the manure residues and the manually conveyed manure residues in the pig house into a septic tank;
s2, absorbing odor generated by the septic tank through an air-induced pipeline system, adding a certain amount of active carbon into the sewage subjected to flocculation treatment, absorbing the generated odor through the air-induced pipeline system, and then discharging the absorbed odor after metabolic degradation through a biological filter membrane and microorganisms;
s3, lifting the flocculated sewage by a pump, then feeding the sewage into a baffled anaerobic reaction tank, carrying out primary biochemical treatment, drying the precipitated sludge by a sludge drying tank, sending the dried sludge to a composting yard, accumulating and fermenting the manure together with artificially cleaned manure to be used as a compound fertilizer, after the sewage is treated by the baffled anaerobic tank, degrading COD and BOD of the manure sewage by more than 80%, feeding the sewage into a stream oxidation ditch through an intermediate regulating tank, carrying out aerobic advanced treatment, and further carrying out dephosphorization and deamination treatment on the sewage, wherein the removal rate of main degradation indexes of COD, BOD and NH3-N can exceed 97%;
s4, enabling the processed sewage to flow into a reaction tank, adjusting the pH value of the sewage to 8-9 by adding alkali, enabling ammonia nitrogen in the sewage to exist mainly in a free state under an alkaline condition, then enabling the processed sewage to flow into a shallow aeration tank, wherein an aeration device is installed in the shallow aeration tank, blowing the free ammonia nitrogen out of the sewage by the aeration device to greatly reduce the content of the ammonia nitrogen, then enabling the aerated sewage to flow into a sedimentation tank, adding a phosphorus removal agent into the sedimentation tank, precipitating the sewage in the sedimentation tank after the reaction, and discharging sludge to achieve the purpose of removing total phosphorus in the sewage;
s5, adding a certain amount of microorganisms into the solid excrement in the excrement stacking tank, carrying out anaerobic fermentation after the excrement stacking tank is sealed, determining the anaerobic fermentation time according to the excrement amount, taking out the materials, drying the materials, and then making the dried materials into waste materials through a granulator.
2. The wastewater treatment method for the breeding pigs according to claim 1, characterized in that: in S1, when the feces are washed with clean water, the amount of water needs to be controlled to reduce the amount of water as much as possible.
3. The wastewater treatment method for the breeding pigs according to claim 1, characterized in that: in the step S2, the activated carbon is required to be prepared into granules with the diameter less than 2 cm, then the dosage is determined according to the actual amount of the sewage, the activated carbon is replaced at regular time, and the adsorbed saturated activated carbon is treated.
4. The wastewater treatment method for the breeding pigs according to claim 1, characterized in that: in S3, when the baffled anaerobic tank treats sewage, the tightness of the baffled anaerobic tank needs to be ensured to prevent a large amount of microorganisms in air from entering the baffled anaerobic tank.
5. The wastewater treatment method for the breeding pigs according to claim 1, characterized in that: in the S5, the anaerobic fermentation time of the excrement is determined according to the excrement amount, generally about 30 days, and after the excrement fermentation in the septic tank is finished, the gas needs to be discharged firstly, so that accidents are prevented.
6. The wastewater treatment method for the breeding pigs according to claim 1, characterized in that: before fecal sewage treatment, need carry out the processing of keeping in to sewage, the processing waste water that has handled flows into first catch basin, the pig farm sewage of keeping in.
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Application publication date: 20200818 |