CN113003869A - Large-scale pig farm breeding wastewater treatment system and method - Google Patents
Large-scale pig farm breeding wastewater treatment system and method Download PDFInfo
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Abstract
The invention discloses a system and a method for treating breeding wastewater of a large-scale pig farm, wherein the wastewater treatment system comprises a grating 1, an adjusting tank 2, a solid-liquid separator 3, an intermediate water tank A4, an air floatation machine 5, an intermediate water tank B6, an anaerobic tower 7, MMBR integrated equipment 8, a clear water tank 9 and a disinfection tank 10 which are sequentially arranged, and the wastewater treatment system also comprises a sludge concentration tank 11 which is respectively communicated with the solid-liquid separator 3, the air floatation machine 5 and the MMBR integrated equipment 8. Due to the separation effect of the membrane, other solid-liquid separation equipment such as precipitation, filtration and the like is not required to be arranged; the high-efficiency solid-liquid separation separates suspended substances, colloidal substances, microbial flora of biological units and purified water in the wastewater, and the wastewater can be directly recycled without three-stage treatment; the water quality is good, no sludge is leaked, good water quality can be obtained after the equipment starts to operate, organic components such as phosphorus, nitrogen and the like can be removed, and the water consumption standards such as fire fighting, irrigation, toilet flushing, greening and the like can be met.
Description
Technical Field
The invention relates to the technical field of livestock breeding, in particular to a system and a method for treating breeding wastewater of a large-scale pig farm.
Background
The breeding sewage mainly comprises urine, partial excrement and field rain sewage, belongs to high-concentration organic sewage, and has large content of suspended matters and ammonia nitrogen. Thus, after untreated sewage enters a natural water body, the contents of solid suspended matters, organic matters and microorganisms in the water are increased, the physical, chemical and domestic community composition of the water body is changed, and the water body is deteriorated. The sewage also contains a large amount of pathogenic microorganisms which can be diffused and spread through water bodies and life bodies in the water, so that the health of people and livestock is harmed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a system and a method for treating the breeding wastewater of the large-scale pig farm, and other solid-liquid separation equipment such as precipitation, filtration and the like is not needed to be set due to the separation effect of a membrane; the high-efficiency solid-liquid separation separates suspended substances, colloidal substances, microbial flora of biological units and purified water in the wastewater, and the wastewater can be directly recycled without three-stage treatment; the water quality is good, no sludge is leaked, good water quality can be obtained after the equipment starts to operate, organic components such as phosphorus, nitrogen and the like can be removed, and the water consumption standards such as fire fighting, irrigation, toilet flushing, greening and the like can be met.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a scale pig farm breeds effluent disposal system, effluent disposal system is including grid, equalizing basin, solid-liquid separator, middle pond A, air supporting machine, middle pond B, anaerobic tower, MMBR integration equipment, clean water basin and the disinfection pond that sets gradually.
As a preferred technical scheme, the system also comprises a sludge concentration tank which is respectively communicated with the solid-liquid separator, the air flotation machine and the MMBR integrated equipment.
As a preferred technical scheme of the invention, the MMBR integrated equipment is an anoxic tank, an aerobic tank and an MBR membrane tank integrated machine.
A treatment method of the aquaculture wastewater treatment system comprises the following specific steps:
s1: the sewage firstly intercepts large blocks of dirt through the grating, prevents the sewage from entering a subsequent stage to block equipment, and then enters a regulating tank for aeration treatment to prevent the sewage from being rotten and smelly due to anaerobic reaction;
s2: removing the excrement, feed and other high-density suspended matters in the wastewater through a solid-liquid separator after the water is discharged from the regulating tank;
s3: the effluent of the solid-liquid separator enters an intermediate water pool A for buffering and gathering, and then is lifted by a sewage pump to enter an air floatation machine to remove fine suspended matters and colloidal oils in the sewage;
s4: after water is discharged from the air floatation machine, the water flows into the intermediate water tank B for buffering and gathering, then the water discharged from the intermediate water tank B is lifted by a pump to enter the anaerobic tower, partial organic pollutants in the wastewater are consumed and macromolecular refractory substances are converted into easily degradable substances through the anaerobic action in the anaerobic tower, the biodegradability of the sewage is improved, and the efficiency of subsequent biological treatment is improved;
s5: the effluent of the anaerobic tower automatically flows into an anoxic tank, denitrifying bacteria in the anoxic tank carry out denitrification reaction by using organic matters in raw water and nitrate and nitrite in reflux mixed liquor, and the nitrate and nitrite are subjected to denitrification to generate nitrogen to be discharged so as to achieve the aim of denitrification;
s6: the effluent of the anoxic tank automatically flows into an aerobic tank to suspend high-efficiency three-dimensional biological filler, and an air blower is used for oxygenation and aeration to maintain the condition that the dissolved oxygen concentration in the tank is 2-4mg/l, aerobic microorganisms and autotrophic bacteria mainly exist in the aerobic tank, the aerobic microorganisms can decompose organic matters into CO2 and H2O, and the pollution loads of BOD5, COD, SS and the like in the wastewater are greatly degraded;
s7: the effluent of the aerobic tank enters an MBR membrane tank, the MBR membrane tank is a novel water treatment technology combining a high-efficiency membrane separation technology and an activated sludge process, the application of a membrane in liquid replaces a secondary sedimentation tank in the activated sludge process to carry out solid-liquid separation, the purpose of sludge-water separation is effectively achieved, the high-efficiency interception function of the membrane can effectively intercept nitrifying bacteria, so that the nitrifying bacteria are completely intercepted in a bioreactor, the nitrification reaction can be smoothly carried out, ammonia nitrogen is effectively removed, the loss of sludge is avoided, meanwhile, macromolecular organic matters which are difficult to degrade once can be intercepted, the residence time of the macromolecular organic matters in the reactor is prolonged, and the macromolecular organic matters are decomposed to the maximum extent;
s8: the effluent of the MBR membrane tank enters a clean water tank for buffering and gathering, and is conveyed to a disinfection tank by a clean water pump, and the disinfection tank is sterilized and disinfected by a disinfectant, so that the emission standard can be met.
As a preferred technical scheme of the invention, coagulant and flocculant are added into the air flotation machine, so that the demulsification effect is realized, SS and the like in the wastewater form floccules, and the floccules are brought to the water surface and removed by adhering air bubbles in the air flotation machine, thereby improving the air flotation decontamination efficiency.
As a preferred technical scheme of the invention, the sludge generated by the solid-liquid separator, the air flotation machine and the MMBR integrated equipment is conveyed to a sludge concentration tank for further concentration treatment, thereby facilitating the recycling of the sludge.
Compared with the prior art, the invention can achieve the following beneficial effects:
due to the separation effect of the membrane, other solid-liquid separation equipment such as precipitation, filtration and the like is not required to be arranged; the high-efficiency solid-liquid separation separates suspended substances, colloidal substances, microbial flora of biological units and purified water in the wastewater, and the wastewater can be directly recycled without three-stage treatment; the water quality is good, no sludge is leaked, good water quality can be obtained after the equipment starts to operate, organic components such as phosphorus, nitrogen and the like can be removed, and the water consumption standards such as fire fighting, irrigation, toilet flushing, greening and the like can be met.
Drawings
FIG. 1 is a flow diagram of a wastewater treatment system of the present invention;
wherein: 1. a grid; 2. a regulating tank; 3. a solid-liquid separator; 4. a middle water pool A; 5. an air flotation machine; 6. a middle water pool B; 7. an anaerobic tower; 8. an MMBR integration device; 9. a clean water tank; 10. a disinfection tank; 11. sludge thickening tank.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to fig. 1, the system and the method for treating the breeding wastewater in the large-scale pig farm comprise a grating 1, an adjusting tank 2, a solid-liquid separator 3, an intermediate water tank A4, an air floatation machine 5, an intermediate water tank B6, an anaerobic tower 7, an MMBR integrated device 8, a clean water tank 9 and a disinfection tank 10 which are sequentially arranged.
The system also comprises a sludge concentration tank 11 which is respectively communicated with the solid-liquid separator 3, the air flotation machine 5 and the MMBR integrated equipment 8. The MMBR integrated equipment 8 is an integrated machine of an anoxic tank, an aerobic tank and an MBR membrane tank.
The specific treatment steps are as follows:
s1: the sewage firstly intercepts large blocks of dirt through the grating 1 to prevent the sewage from entering a subsequent stage to block equipment, and then enters the regulating tank 2 for aeration treatment to prevent the sewage from rotting and smelling due to anaerobic reaction;
s2: after the water is discharged from the adjusting tank 2, the suspended matters with high density, such as excrement, feed and the like in the wastewater are removed through a solid-liquid separator 3;
s3: the effluent of the solid-liquid separator 3 enters an intermediate water pool A4 for buffering and gathering, and then is lifted by a sewage pump to enter the air floatation machine 5 for removing fine suspended matters and colloid oils in the sewage;
s4: after the water is discharged from the air floatation machine 5, the water flows into an intermediate water tank B6 to be buffered and gathered, then the water discharged from the intermediate water tank B is lifted by a pump to enter an anaerobic tower 7, partial organic pollutants in the wastewater are consumed and macromolecular refractory substances are converted into easily degradable substances through the anaerobic action in the anaerobic tower, the biodegradability of the sewage is improved, and the efficiency of subsequent biological treatment is improved;
s5: the effluent of the anaerobic tower automatically flows into an anoxic tank, denitrifying bacteria in the anoxic tank carry out denitrification reaction by using organic matters in raw water and nitrate and nitrite in reflux mixed liquor, and the nitrate and nitrite are subjected to denitrification to generate nitrogen to be discharged so as to achieve the aim of denitrification;
s6: the effluent of the anoxic tank automatically flows into an aerobic tank to suspend high-efficiency three-dimensional biological filler, and an air blower is used for oxygenation and aeration to maintain the condition that the dissolved oxygen concentration in the tank is 2-4mg/l, aerobic microorganisms and autotrophic bacteria mainly exist in the aerobic tank, the aerobic microorganisms can decompose organic matters into CO2 and H2O, and the pollution loads of BOD5, COD, SS and the like in the wastewater are greatly degraded;
s7: the effluent of the aerobic tank enters an MBR membrane tank, the MBR membrane tank is a novel water treatment technology combining a high-efficiency membrane separation technology and an activated sludge process, the application of a membrane in liquid replaces a secondary sedimentation tank in the activated sludge process to carry out solid-liquid separation, the purpose of sludge-water separation is effectively achieved, the high-efficiency interception function of the membrane can effectively intercept nitrifying bacteria, so that the nitrifying bacteria are completely intercepted in a bioreactor, the nitrification reaction can be smoothly carried out, ammonia nitrogen is effectively removed, the loss of sludge is avoided, meanwhile, macromolecular organic matters which are difficult to degrade once can be intercepted, the residence time of the macromolecular organic matters in the reactor is prolonged, and the macromolecular organic matters are decomposed to the maximum extent;
s8: the effluent of the MBR membrane tank enters a clean water tank 9 for buffering and gathering, and then is conveyed into a disinfection tank 10 by a clean water pump, and the effluent is sterilized and disinfected in the disinfection tank by a disinfectant, so that the discharge standard can be reached.
Coagulant and flocculant are added into the air flotation machine 5, so that on one hand, demulsification is realized, on the other hand, SS and the like in the wastewater form floccules, and the floccules are brought to the water surface and removed by adhering bubbles in the air flotation machine, thereby improving the air flotation decontamination efficiency.
And the sludge generated by the solid-liquid separator, the air floatation machine and the MMBR integrated equipment is conveyed to a sludge concentration tank for further concentration treatment, so that the sludge is convenient to recycle.
Due to the separation effect of the membrane, other solid-liquid separation equipment such as precipitation, filtration and the like is not required to be arranged; the high-efficiency solid-liquid separation separates suspended substances, colloidal substances, microbial flora of biological units and purified water in the wastewater, and the wastewater can be directly recycled without three-stage treatment; the water quality is good, no sludge is leaked, good water quality can be obtained after the equipment starts to operate, organic components such as phosphorus, nitrogen and the like can be removed, and the water consumption standards such as fire fighting, irrigation, toilet flushing, greening and the like can be met.
The embodiments of the present invention are not limited thereto, and according to the above-described embodiments of the present invention, other embodiments obtained by modifying, replacing or combining the above-described preferred embodiments in various other forms without departing from the basic technical idea of the present invention by using the conventional technical knowledge and the conventional means in the field can fall within the scope of the present invention.
Claims (6)
1. The utility model provides a scale pig farm breeds effluent disposal system, its characterized in that, effluent disposal system is including the grid, equalizing basin, solid-liquid separator, middle pond A, air supporting machine, middle pond B, anaerobic tower, MMBR integration equipment, clean water basin and the disinfection pond that set gradually.
2. The system of claim 1, further comprising a sludge concentration tank, wherein the sludge concentration tank is respectively communicated with the solid-liquid separator, the air flotation machine and the MMBR integrated equipment.
3. The large-scale pig farm aquaculture wastewater treatment system of claim 1, wherein the MMBR integrated equipment is an anoxic pond, an aerobic pond and an MBR membrane pond integrated machine.
4. A treatment method of the aquaculture wastewater treatment system according to any one of claims 1 to 3, comprising the following specific steps:
s1: the sewage firstly intercepts large blocks of dirt through the grating, prevents the sewage from entering a subsequent stage to block equipment, and then enters a regulating tank for aeration treatment to prevent the sewage from being rotten and smelly due to anaerobic reaction;
s2: removing the excrement, feed and other high-density suspended matters in the wastewater through a solid-liquid separator after the water is discharged from the regulating tank;
s3: the effluent of the solid-liquid separator enters an intermediate water pool A for buffering and gathering, and then is lifted by a sewage pump to enter an air floatation machine to remove fine suspended matters and colloidal oils in the sewage;
s4: after water is discharged from the air floatation machine, the water flows into the intermediate water tank B for buffering and gathering, then the water discharged from the intermediate water tank B is lifted by a pump to enter the anaerobic tower, partial organic pollutants in the wastewater are consumed and macromolecular refractory substances are converted into easily degradable substances through the anaerobic action in the anaerobic tower, the biodegradability of the sewage is improved, and the efficiency of subsequent biological treatment is improved;
s5: the effluent of the anaerobic tower automatically flows into an anoxic tank, denitrifying bacteria in the anoxic tank carry out denitrification reaction by using organic matters in raw water and nitrate and nitrite in reflux mixed liquor, and the nitrate and nitrite are subjected to denitrification to generate nitrogen to be discharged so as to achieve the aim of denitrification;
s6: the effluent of the anoxic tank automatically flows into an aerobic tank to suspend high-efficiency three-dimensional biological filler, and an air blower is used for oxygenation and aeration to maintain the condition that the dissolved oxygen concentration in the tank is 2-4mg/l, aerobic microorganisms and autotrophic bacteria mainly exist in the aerobic tank, and the aerobic microorganisms can decompose organic matters into CO2And H2O, greatly degrading pollution loads such as BOD5, COD, SS and the like in the wastewater;
s7: the effluent of the aerobic tank enters an MBR membrane tank, the MBR membrane tank is a novel water treatment technology combining a high-efficiency membrane separation technology and an activated sludge process, the application of a membrane in liquid replaces a secondary sedimentation tank in the activated sludge process to carry out solid-liquid separation, the purpose of sludge-water separation is effectively achieved, the high-efficiency interception function of the membrane can effectively intercept nitrifying bacteria, so that the nitrifying bacteria are completely intercepted in a bioreactor, the nitrification reaction can be smoothly carried out, ammonia nitrogen is effectively removed, the loss of sludge is avoided, meanwhile, macromolecular organic matters which are difficult to degrade once can be intercepted, the residence time of the macromolecular organic matters in the reactor is prolonged, and the macromolecular organic matters are decomposed to the maximum extent;
s8: the effluent of the MBR membrane tank enters a clean water tank for buffering and gathering, and is conveyed to a disinfection tank by a clean water pump, and the disinfection tank is sterilized and disinfected by a disinfectant, so that the emission standard can be met.
5. The method for treating wastewater from pig farm cultivation on a large scale according to claim 4, wherein coagulant and flocculant are added into the flotation machine to demulsify, and SS in wastewater forms floccules, which are taken to the water surface and removed by adhering to the air bubbles in the flotation machine, thereby improving the efficiency of flotation decontamination.
6. The method for treating the breeding wastewater of the large-scale pig farm according to claim 4, wherein the sludge generated by the solid-liquid separator, the air floatation machine and the MMBR integrated equipment is conveyed to a sludge concentration tank for further concentration treatment, so that the sludge is convenient to recycle.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113880355A (en) * | 2021-10-14 | 2022-01-04 | 深圳市旺竹环保有限公司 | Farm manure treatment process |
CN114590969A (en) * | 2022-03-25 | 2022-06-07 | 湖南子宏生态科技股份有限公司 | Livestock and poultry breeding wastewater treatment system |
CN114804544A (en) * | 2022-06-01 | 2022-07-29 | 宁夏玖倍尔农业发展有限公司 | Method for purifying sewage of livestock and poultry farm |
CN117164176A (en) * | 2023-11-02 | 2023-12-05 | 广东科清环境技术有限公司 | Method for treating mariculture tail water |
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