Livestock and poultry manure water treatment device and treatment method

Abstract

The application discloses a kind of livestock and poultry manure water treatment device and processing method, comprising: S1: waste water is passed into MBBR anaerobic tank, the gas generated to MBBR anaerobic tank is collected, classification;The wastewater treated by S1 is passed into MBBR first anoxic tank, and the collected gas is used to pass into MBBR first anoxic tank and is aerated and is used as carbon source, and the organic matter in wastewater is further degraded;The wastewater treated by S2 is passed into MBBR aerobic tank, and oxygen is passed in, and the collected gas is aerated, and the generated gas is collected;The wastewater treated by S3 is passed into MBBR second anoxic tank, and the generated gas is collected, separated;The wastewater treated by S4 is passed into MBR reaction tank, and solid-liquid separation is carried out, and the collected gas is used as carbon source and is passed into MBR reaction tank;So as to reduce the consumption of other energy, improve the energy utilization, avoid the emission of greenhouse gas.

Description

TECHNICAL FIELD

[0001] The present application relates to a sewage treatment device, in particular to a livestock manure sewage treatment device and treatment method. BACKGROUND

[0002] Sewage treatment can also be called wastewater treatment. However, the latter is a broad term and can also refer to industrial wastewater. For most cities, the sewer system will also discharge a portion of the sewage to the sewage treatment plant, which has usually been pretreated at the factory itself to reduce the pollutant load. If the sewer system is a combined sewer, it will also bring urban runoff (rainwater) to the sewage treatment plant. The sewage can flow to the sewage treatment plant through pipes and the aid of gravity and pumps. The sewage filtration part usually includes a bar screen to filter solids and large objects, which are then collected in a trash bin and discarded in a landfill. Fats and oils are also removed before the primary treatment of the sewage.

[0003] However, in the prior art, when treating urban domestic sewage, a large amount of greenhouse gases such as carbon dioxide and methane will be generated, which are directly discharged into the air, causing the global temperature to rise and exacerbating the greenhouse effect. SUMMARY

[0004] The present application overcomes the shortcomings of the prior art and provides a livestock manure sewage treatment device and treatment method.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows: a livestock manure sewage treatment device and treatment method, comprising the following steps:

[0006] S1: passing the wastewater into the MBBR anaerobic tank, collecting and classifying the gas generated by the MBBR anaerobic tank;

[0007] S2: passing the wastewater treated by S1 into the MBBR primary anoxic tank, using the collected gas to aerate the MBBR primary anoxic tank and as a carbon source to further degrade the organic matter in the wastewater;

[0008] S3: passing the wastewater treated by S2 into the MBBR aerobic tank, passing in oxygen, using the collected gas to aerate, and collecting the generated gas;

[0009] S4: passing the wastewater treated by S3 into the MBBR secondary anoxic tank and collecting and separating the generated gas;

[0010] S5: passing the wastewater treated by S4 into the MBR reaction tank for solid-liquid separation, and using the collected gas as a carbon source to pass into the MBR reaction tank.

[0011] In a preferred embodiment of the present application, in S1, the gas generated by the MBBR anaerobic tank is nitrogen, carbon dioxide and methane.

[0012] In a preferred embodiment of the present application, in S1, the gas is collected by using membrane separation method, adsorption separation method or compression and condensation separation method.

[0013] In a preferred embodiment of the present application, in S2, the gas used for aeration is carbon dioxide, and the gas used as carbon source is methane.

[0014] In a preferred embodiment of the present application, in S3, the gas used for aeration is carbon dioxide, and the collected gas is carbon dioxide.

[0015] In a preferred embodiment of the present application, in S4, the collected gas is methane and carbon dioxide, and the separation is performed by using the same method as in S1.

[0016] In a preferred embodiment of the present application, in S5, the gas used as carbon source is methane.

[0017] A livestock and poultry manure water treatment device, comprising: a plurality of treatment tanks, and a collection mechanism arranged above the treatment tanks;

[0018] The treatment tank comprises: an MBBR liquid oxygen tank, an MBBR and anoxic tank, an MBBR aerobic tank, an MBBR secondary anoxic tank and an MBR reaction tank, and each tank in the treatment tank is connected in sequence by a pipeline; the MBBR primary anoxic tank and the MBBR aerobic tank are provided with an aeration member at the bottom;

[0019] The collection mechanism comprises an air extraction assembly and a classification box fixedly connected to the top of the air extraction assembly; the classification box is connected to the treatment tank by a pipeline, a through hole is formed in the bottom of the classification box, and a plurality of layers of selective permeable membranes with gradually decreasing pore diameters are arranged in the classification box.

[0020] In a preferred embodiment of the present application, the air extraction assembly mainly comprises a fan and a wind wheel, and the fan drives the wind wheel to rotate to suck the gas discharged from the treatment tank into the classification box.

[0021] In a preferred embodiment of the present application, the selective permeable membrane divides the classification box into a plurality of layers, and the pore diameters of the selective permeable membranes gradually decrease from the position close to the treatment tank to the position far away from the treatment tank.

[0022] The present application solves the defects in the background art and has the following beneficial effects:

[0023] (1) The present application provides a livestock and poultry manure water treatment device and method, which uses a treatment tank and an air extraction assembly together to treat wastewater in the treatment tank and collect and recycle the gas discharged during the treatment by using the air extraction assembly, thereby achieving the purpose of reducing greenhouse gas emissions. Compared with the prior art, the present application realizes efficient wastewater treatment while reducing greenhouse gas emissions, thereby achieving the purpose of protecting the environment.

[0024] (2) The present application provides a livestock and poultry manure water treatment device and method, which uses MBBR and MBR processes together to convert organic matter and nutrients such as nitrogen and phosphorus in wastewater into cell mass and energy required for microbial growth by fixing biological membranes on fillers, and to retain suspended solids and microorganisms in the wastewater on the membrane surface by using a microporous membrane filter, thereby achieving the effect of purifying water quality. Compared with the prior art, the combination of MBBR and MBR processes can fully utilize the advantages of both processes and improve the wastewater treatment effect. Specifically, the MBBR process can degrade a large amount of organic matter and nutrients to improve the water quality to a certain level, and then the MBR process can further filter and purify to obtain higher water quality. This combination can effectively remove suspended solids, organic matter and microorganisms in wastewater, while also reducing the use of chemical agents to achieve energy saving and environmental protection.

[0025] (3) The present application provides a livestock and poultry manure water treatment device and method, which uses a fan, a wind wheel and a classification tank together to cause negative pressure in the space above the treatment tank by the fan-driven wheel, thereby achieving the effect of absorbing the gas discharged from the treatment tank into the classification tank above, and generating a thrust in the classification tank due to the different pressures on the upper and lower sides of the fan, so that the gas passes through the selectively permeable membrane according to the different molecular sizes, completes classification and subsequent entry into the pipeline for recycling, thereby reducing the consumption of other energy sources, improving the energy utilization rate and avoiding the emission of greenhouse gases. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor;

[0027] Figure 1 is a perspective view of the preferred embodiment of the present application. DETAILED DESCRIPTION

[0028] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the protection scope of the present application.

[0029] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details, other than in the description of the application. In other instances, well-known methods have not been described in detail in order not to unnecessarily obscure the present application.

[0030] As shown in Figure 1 A livestock and poultry manure water treatment device and a treatment method, comprising the following steps:

[0031] S1: the wastewater is introduced into the MBBR anaerobic tank, and the gas generated by the MBBR anaerobic tank is collected and classified;

[0032] In one preferred embodiment of the present application, in S1, the gas generated by the MBBR anaerobic tank is nitrogen, carbon dioxide and methane.

[0033] In one preferred embodiment of the present application, in S1, the collection is performed by using three methods of membrane separation method, adsorption separation method or compression and condensation separation method.

[0034] It should be noted that the microorganisms in the MBBR anaerobic tank degrade organic matter through microorganisms attached to the biofilm on the surface of the filler. These microorganisms carry out metabolic activities under anoxic conditions to convert organic matter into smaller organic molecules. This can effectively remove organic matter in wastewater and reduce pollutant load in water bodies; the microorganisms in the MBBR anaerobic tank can also achieve partial removal of nitrogen and phosphorus. Through denitrification, microorganisms reduce nitrate in wastewater to nitrogen gas, thereby reducing the nitrogen content in water bodies. In addition, microorganisms can also achieve partial removal of phosphorus through the release and absorption of phosphate; the MBBR anaerobic tank can effectively remove organic matter and part of nitrogen and phosphorus in wastewater, reducing the load of subsequent treatment units (such as MBBR aerobic tank, sedimentation tank, etc.). This can improve the treatment efficiency and stability of the entire MBBR process; in the process of anaerobic microorganisms producing energy under anoxic conditions, organic matter is metabolized by anaerobic respiration, which oxidizes organic matter to carbon dioxide and water, thereby producing a large amount of carbon dioxide. At the same time, in the process of anaerobic microorganisms utilizing organic matter to produce energy under anoxic conditions, anaerobic microorganisms reduce nitrate (NO3-) in wastewater to nitrogen gas (N2) through denitrification. Through denitrification, anaerobic microorganisms reduce nitrogen oxides in nitrate to nitrogen gas and release it. Part of the anaerobic microorganisms can carry out the methane fermentation process to convert organic matter into methane, thereby producing carbon dioxide, nitrogen gas and methane, and collecting the three gases and separating them using membrane separation.

[0035] S2: passing the wastewater treated in S1 into the MBBR primary anoxic tank, using the collected gas to aerate the MBBR primary anoxic tank and as a carbon source to further degrade organic matter in the wastewater;

[0036] In one preferred embodiment of the present application, in S2, the gas used for aeration is carbon dioxide and the gas used as a carbon source is methane.

[0037] It should be noted that the microorganisms in the MBBR first anoxic tank degrade organic matter under anoxic conditions, and the degradation is carried out by the microorganisms attached to the biofilm on the surface of the filler, so as to convert the organic matter into smaller organic molecules. In this way, the organic matter in the wastewater can be effectively removed, and the pollutant load in the water body can be reduced; the MBBR first anoxic tank can effectively remove the organic matter and part of the nitrogen and phosphorus in the wastewater, and reduce the load of the subsequent treatment unit (such as the MBBR aerobic tank, the sedimentation tank, etc.). In this way, the treatment efficiency and stability of the entire MBBR process can be improved; the collected methane is introduced into the MBBR first anoxic tank as a carbon source, and the methane can be used as a carbon source for the metabolism of anaerobic microorganisms under anoxic conditions as an organic compound; the anaerobic microorganisms can utilize the methane for fermentation and energy production, so as to realize the degradation of organic matter, and provide the energy and carbon source required for the growth of microorganisms, and promote the reproduction and activity of microorganisms. This helps to increase the number and activity of anaerobic microorganisms, and improve the efficiency and stability of wastewater treatment; carbon dioxide as the aeration gas can provide the oxygen required by the microorganisms under anoxic conditions. Carbon dioxide aeration can increase the oxygen concentration in the anoxic tank, improve the growth environment of the microorganisms, and improve the metabolic activity of the microorganisms, and can also provide the oxygen required in the denitrification process. The anaerobic microorganisms reduce nitrate in the wastewater to nitrogen by denitrification, so as to realize the removal of nitrogen. Carbon dioxide aeration can provide the oxygen required in the denitrification process, and promote the denitrification process.

[0038] S3: introducing the wastewater treated in S2 into the MBBR aerobic tank, introducing oxygen, using the collected gas for aeration, and collecting the generated gas;

[0039] In a preferred embodiment of the present application, in S3, the gas used for aeration is carbon dioxide, and the collected gas is carbon dioxide.

[0040] It should be noted that the MBBR aerobic tank is a kind of biofilm reactor, which mainly plays a role in degrading organic matter in wastewater by microorganisms on the biofilm, and at the same time, oxidation-reduction reaction of ammonia nitrogen, nitrate and the like is carried out to achieve the purpose of wastewater treatment. The microorganisms attached to the carrier in the aerobic tank degrade organic matter into carbon dioxide and water through metabolic reaction, so as to achieve the purpose of removing organic matter, and the ammonia oxidizing bacteria (AOB) and nitrifying bacteria (NOB) in the aerobic tank can oxidize ammonia nitrogen in the wastewater into nitrate, so as to achieve the purpose of removing ammonia nitrogen. The denitrifying bacteria in the aerobic tank can reduce nitrate by using organic matter, so as to achieve the purpose of removing nitrate. It is necessary to supply sufficient dissolved oxygen in the aerobic tank to maintain the metabolic activity of microorganisms, so as to ensure the treatment effect. The MBBR aerobic tank can improve the removal efficiency of COD / BOD, while reducing the sludge production and treatment cost; oxygen is an essential substance for microbial degradation of organic matter and oxidation of ammonia nitrogen and the like, which can increase the dissolved oxygen concentration in the aerobic tank, provide oxygen required for microbial respiration metabolism, and by increasing the oxygen supply, the metabolic activity and degradation efficiency of microorganisms can be improved; the microorganisms in the aerobic tank degrade organic matter into carbon dioxide and water through metabolic reaction. The introduction of oxygen can provide oxygen for aerobic respiration of microorganisms, accelerate the degradation process of organic matter, so as to improve the removal efficiency of organic matter in wastewater. The ammonia oxidizing bacteria (AOB) in the aerobic tank can oxidize ammonia nitrogen in the wastewater into nitrate. The introduction of oxygen can provide the ammonia oxidizing bacteria with oxidation reaction, and accelerate the removal process of ammonia nitrogen. The denitrifying bacteria in the aerobic tank can reduce nitrate by using organic matter, and convert it into nitrogen. The introduction of oxygen can provide the denitrifying bacteria with reduction reaction, and promote the removal process of nitrate. Carbon dioxide is used for aeration, which can provide carbon source for photosynthesis and methanation of microorganisms. Photosynthesis can produce organic matter, which provides energy and carbon source for microorganisms, and promotes the degradation of organic matter in wastewater. Methanation can use methane as carbon source to further promote the degradation and removal of organic matter.

[0041] S4: the wastewater treated in S3 is introduced into the MBBR secondary anoxic tank, and the generated gas is collected and separated;

[0042] In one preferred embodiment of the present application, in S4, the collected gas is methane and carbon dioxide, and the separation is carried out by the same method as in S1.

[0043] It should be noted that the microorganisms in the secondary anoxic tank metabolize by anaerobic respiration to degrade organic matter into intermediate products such as organic acids, alcohol and gas. These intermediate products can be further degraded by subsequent microorganisms to achieve the removal of organic matter, and through the degradation of microorganisms, the organic matter in the wastewater is degraded into harmless substances to achieve the purpose of removing organic pollutants; in the secondary anoxic tank, due to the metabolic characteristics of microorganisms under anoxic conditions, part of the microorganisms will release the absorbed phosphorus, at the same time, the denitrifying bacteria in the secondary anoxic tank can reduce nitrate by using organic matter to convert it into nitrogen, thereby releasing phosphorus and reducing nitrate through the metabolic action of microorganisms, thereby achieving the removal of phosphorus and nitrate; and in the secondary anoxic tank, part of the microorganisms release methane gas through methanogenic fermentation, and the methane gas is collected and recycled as a carbon source to other tanks for recycling.

[0044] S5: passing the wastewater treated in S4 into the MBR reaction tank, performing solid-liquid separation, and using the collected gas as a carbon source and passing it into the MBR reaction tank.

[0045] In a preferred embodiment of the present application, in S5, the gas used as a carbon source is methane.

[0046] It should be noted that the microorganisms in the MBR reaction tank can remove suspended solids and colloidal substances in the wastewater through adsorption and biological membrane filtration. Microorganisms form a biological membrane on the surface of the membrane, and through the filtration of the biological membrane, suspended solids and colloidal substances in the wastewater can be effectively removed to improve water quality. The microorganisms in the MBR reaction tank can absorb and convert nutrient salts in the wastewater, such as ammonia nitrogen and phosphorus. Through the growth and metabolism of microorganisms, the nutrient salts in the wastewater can be converted into biomass or gas products in the microorganisms, thereby achieving the removal of nutrient salts. The microorganisms and membrane filtration system in the MBR reaction tank can effectively remove micro-pollutants such as drug residues, organic matter and heavy metals in the wastewater. Microbial degradation and adsorption and membrane filtration can remove micro-pollutants from wastewater to improve water quality. Due to the presence of the membrane filter, microorganisms cannot obtain enough organic matter from the mixed liquor, so external carbon sources need to be added to provide organic matter to maintain the growth and metabolism of microorganisms.

[0047] A livestock and poultry manure wastewater treatment device, comprising: a plurality of treatment tanks, and a collection mechanism arranged above the treatment tanks;

[0048] The treatment tank comprises an MBBR liquid oxygen tank, an MBBR and anoxic tank, an MBBR aerobic tank, an MBBR secondary anoxic tank and an MBR reaction tank, and each tank in the treatment tank is connected in sequence by a pipeline; the MBBR primary anoxic tank and the MBBR aerobic tank are provided with an aeration member at the bottom;

[0049] It should be noted that MBBR is a commonly used biofilm process for wastewater treatment. It combines the advantages of suspended bioreactors (SBR) and membrane bioreactors (MBR), offering high efficiency, stability, and flexibility. MBBR Anaerobic Tank: Wastewater first enters the MBBR anaerobic tank, where anaerobic microorganisms biodegrade organic matter through a biofilm attached to the packing material, converting organic matter into soluble organic acids and gases (such as methane). MBBR Primary Anoxic Tank: Wastewater from the MBBR anaerobic tank enters the MBBR primary anoxic tank, where microorganisms continue to degrade organic matter. However, under anoxic conditions, the produced organic acids are further degraded into volatile fatty acids (VFAs), such as acetic acid and propionic acid. MBBR Aerobic Tank: Wastewater enters the MBBR aerobic tank. With an oxygen supply, microorganisms utilize VFAs and other soluble organic matter for oxidative degradation, producing carbon dioxide and water. This process requires a sufficient oxygen supply. MBBR Secondary Anoxic Tank: Wastewater from the MBBR aerobic tank enters the MBBR secondary anoxic tank, where microorganisms further degrade organic matter under anoxic conditions, producing methane and carbon dioxide. MBR Reactor: Finally, wastewater enters the MBR reactor, where microorganisms undergo further biodegradation and filtration through the biofilm attached to the membrane. The membrane's pore size is small enough to effectively prevent the passage of microorganisms and suspended solids, thus achieving solid-liquid separation. Aeration devices are installed at the bottom of the MBBR primary anoxic tank and the MBBR aerobic tank. The MBBR primary anoxic tank is mainly used to remove organic matter and nutrients such as nitrogen and phosphorus. Since this tank is anoxic, aeration is required to provide components for microbial respiration and metabolism. Similarly, the MBBR aerobic tank is also primarily used to remove organic matter and nutrients such as nitrogen and phosphorus, and aeration is also required to provide a sufficient aerobic environment for microbial respiration and metabolism.

[0050] The collection mechanism includes an air extraction assembly and a sorting box fixedly connected to the top of the air extraction assembly; the sorting box is connected to the treatment pool through a pipe, and a through hole is opened at the bottom of the sorting box. Several layers of selectively permeable membranes with gradually decreasing pore size are installed inside the sorting box.

[0051] In a preferred embodiment of the present invention, the air extraction assembly mainly consists of a fan and a fan wheel. The fan drives the fan wheel to rotate, thereby absorbing the gas discharged from the treatment tank into the sorting box.

[0052] It should be noted that the exhaust assembly uses a fan to drive the impeller to rotate, creating a negative pressure between the treatment tank below and the fan. This draws the gas generated in the treatment tank into the odor assembly, and then from inside the exhaust assembly into the sorting bin.

[0053] In a preferred embodiment of the present invention, a permeable membrane is selected to divide the sorting bin into several layers, and the pore size of the permeable membrane is selected to gradually decrease from the position near the treatment pool to the position far away from the treatment pool.

[0054] It should be noted that the sorting box is equipped with three layers of selective permeable membranes, arranged from the closest to the treatment tank to the furthest away from the treatment tank, with the pore size decreasing. This allows the gas to be drawn into the sorting box by the negative pressure created by the fan and impeller after it is released from the treatment tank. The selective permeable membranes then separate the gas from nitrogen, methane, and carbon dioxide because the molecules are different sizes. Furthermore, the permeable membranes can separate and purify different gases based on the size and affinity of the gas molecules. By selecting appropriate membrane materials and operating conditions, pure nitrogen, methane, and carbon dioxide can be separated. Combined with the negative pressure created by the fan and impeller, the gas is propelled through the permeable membrane, which has a selected pore size. No other energy output is required, and the permeable membrane separation technology does not produce chemical waste liquid or waste gas, reducing environmental pollution. In this way, carbon dioxide, methane, and nitrogen are separated into three layers from top to bottom, and each layer is connected to a pipe. Through the pipes, carbon dioxide is sent into the aeration unit as the aeration gas, methane is sent into the treatment tank that requires a carbon source, and nitrogen is directly discharged.

[0055] In this invention, wastewater first enters the MBBR anaerobic tank, where anaerobic microorganisms biodegrade organic matter through a biofilm attached to the packing material, converting organic matter into soluble organic acids and gases (such as methane). The wastewater from the MBBR anaerobic tank then enters the MBBR primary anoxic tank, where microorganisms continue to degrade organic matter. However, under anoxic conditions, the produced organic acids are further degraded into volatile fatty acids (VFAs), such as acetic acid and propionic acid. The wastewater then enters the MBBR aerobic tank, where, with an oxygen supply, microorganisms oxidize and degrade VFAs and other soluble organic matter, producing carbon dioxide and water. This process requires a sufficient oxygen supply. The wastewater from the MBBR aerobic tank then enters the MBBR secondary anoxic tank, where microorganisms further degrade organic matter under anoxic conditions, producing methane and carbon dioxide. Finally, the wastewater enters the MBR reactor, where microorganisms further biodegrade and filter the material through a biofilm attached to the membrane. The membrane has a small enough pore size to effectively prevent the passage of microorganisms and suspended solids, thereby achieving solid-liquid separation and completing a cycle of treatment. While treating wastewater, the generated carbon dioxide, methane, and nitrogen are collected. The carbon dioxide is used as an aeration gas, and the methane is recycled as a carbon source, thus avoiding the emission of greenhouse gases and protecting the environment.

[0056] The above is based on the ideal embodiment of the application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the application. The technical scope of the application is not limited to the content of the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A method for treating livestock and poultry manure wastewater, characterized in that, The method comprises the following steps: S1: passing wastewater into an MBBR anaerobic tank, collecting and classifying the gas generated by the MBBR anaerobic tank, wherein the gas comprises nitrogen, carbon dioxide and methane; S2: passing the wastewater treated in S1 into an MBBR primary anoxic tank, using the collected carbon dioxide gas for aeration, using the collected methane gas as a carbon source, and further degrading the organic matter in the wastewater; S3: passing the wastewater treated in S2 into an MBBR aerobic tank, passing in oxygen, using the collected carbon dioxide gas for aeration, and collecting the carbon dioxide gas generated by the aerobic tank; S4: passing the wastewater treated in S3 into an MBBR secondary anoxic tank, and collecting and separating the gas generated by the MBBR secondary anoxic tank, wherein the gas comprises methane and carbon dioxide; S5: passing the wastewater treated in S4 into an MBR reaction tank, performing solid-liquid separation, and using the collected methane gas as a carbon source and passing it into the MBR reaction tank; The gas collection is performed by a membrane separation method, an adsorption separation method or a compression and condensation separation method, and the gas separation is performed by a selective permeation membrane.

2. Livestock and poultry manure water treatment device based on the treatment method described in claim 1, comprising: The treatment tank and the collecting mechanism arranged above the treatment tank, characterized in that: The treatment tank comprises an MBBR anaerobic tank, an MBBR and anoxic tank, an MBBR aerobic tank, an MBBR secondary anoxic tank and an MBR reaction tank, and each tank in the treatment tank is connected in sequence by a pipeline; the MBBR primary anoxic tank and the MBBR aerobic tank are provided with an aeration member at the bottom; The collecting mechanism comprises an air extraction assembly and a classification box fixedly connected to the top of the air extraction assembly; the classification box is connected to the treatment tank by a pipeline, a through hole is formed in the bottom of the classification box, and a plurality of layers of selective permeation membranes with gradually decreasing pore diameters are arranged in the classification box.

3. The livestock and poultry manure water treatment device according to claim 2, characterized in that: The air extraction assembly mainly comprises a fan and a wind wheel, and the fan drives the wind wheel to rotate to suck the gas discharged from the treatment tank into the classification box.

4. The livestock and poultry manure water treatment device according to claim 2, characterized in that: The selective permeation membranes are arranged to divide the classification box into a plurality of layers, and the pore diameters of the selective permeation membranes gradually decrease from the position close to the treatment tank to the position far from the treatment tank.

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