CN104743747B - Pig farm waste treatment apparatus and method - Google Patents

Abstract

The invention relates to a pig farm waste treatment device and method, including a waste water treatment system, a solid waste treatment system and an odor treatment system; tank, aerobic contact oxidation tank, secondary sedimentation tank, reverse flow biological aerated filter and clean water tank; solid waste treatment system includes solid waste mixing tank, compost tank; odor treatment system includes odor collection pipe, fan And odor alkalization absorption pool. After the wastewater is treated, it enters the clean water pool for reuse. After the solid waste is composted, it is used as agricultural fertilizer. After the odor enters the odor alkalization absorption pool, the pollutants in the gas react with the lye, and the odor is processed into a clean gas. Achieve emission standards.

Description

Pig farm waste treatment device and method

technical field

The invention relates to the technical field of environmental protection, in particular to a pig farm waste treatment device and method.

Background technique

During the operation of the pig farm, it produces not only solid pollutants such as feces, but also waste water such as urine and flushing water, as well as atmospheric pollutants such as odor. Pollutants in pig farms may pollute the environment in the links of collection, storage, transportation, treatment, and utilization. If they are not properly treated and disposed of, they will cause great threats and harm to water, air, soil, and human health. , which has a huge negative impact on the sustainable development of the pig industry itself.

Wastewater from pig farms can be returned to the field or treated with natural treatment systems, but both of these treatment methods require a large amount of land, which is restricted by the national conditions of my country's large population and little land. The industrialized treatment model is the treatment of pig farm wastewater in land-limited areas. In the industrialized treatment mode, the investment and operating costs of using the aerobic process to directly treat pig farm wastewater are very high. At present, the anaerobic-aerobic combined process is mostly used, and the anaerobic-aerobic combined process The treatment effect of pig farm wastewater is not good. The main reason is that the degradation of various pollutants is not synchronized during the anaerobic digestion process, resulting in a decrease in the biodegradability of the anaerobic digestion solution and an imbalance in the ratio of carbon, nitrogen, and phosphorus, which affects aerobic treatment. At the same time, the lack of easily degradable organic matter in the anaerobic digestion solution leads to poor denitrification effect; the generated alkalinity cannot compensate for the alkalinity consumed by the nitrification process, and the decrease in pH value causes the performance of the aerobic treatment system to deteriorate.

Contents of the invention

The technical problem to be solved by the present invention is: in order to solve the problem of environmental pollution generated during the operation of the above-mentioned pig farms and the difficult problem of poor treatment effect of pig farm wastewater by anaerobic-aerobic combined process, the present invention provides a pig farm Field waste treatment device and method.

The technical solution adopted by the present invention to solve the technical problem is: a pig farm waste treatment device, including a waste water treatment system, a solid waste treatment system and an odor treatment system.

The waste water treatment system includes a waste water collection tank, a packing type anoxic anaerobic reaction tank, a waste water regulating tank, an aerobic contact oxidation tank, a secondary sedimentation tank, a reverse flow biological aerated filter tank and a clear water tank; the waste water collection tank , packing type anoxic anaerobic reaction tank, wastewater regulating tank, aerobic contact oxidation tank, secondary settling tank, reverse flow biological aerated filter tank and clear water tank are connected in sequence.

The packing type anoxic anaerobic reaction tank includes a participatory section, anoxic section and anaerobic section separated by baffles, the head end of the participatory section is provided with an inlet pipe for feeding waste water, and the partaerobic section The end is connected with the head end of the anoxic section, and the end of the anoxic section is connected with the head end of the anaerobic section. The lower part of the baffle plate on the inlet side of the anoxic section and the anaerobic section is provided with a 45-degree corner to avoid water flow when entering. The impact of the impact effect, so as to play the role of buffering water flow and uniform water distribution; the end of the anaerobic section is equipped with a three-phase separator and overflow weir, and the overflow weir is connected to the outlet pipe; the bottom of the anaerobic section, anoxic section and anaerobic section is designed Conical structure, the conical structure is connected to the sludge discharge valve; the upper cover of the facultative section, anoxic section and anaerobic section of the packed anoxic anaerobic reaction tank is designed as a conical structure, and the top of the conical structure is set There is an independent methane waste gas collection pipe; fillers are provided in the facultative, anoxic and anaerobic sections.

The wastewater regulating tank includes a water inlet pipe and an outlet pipe for adjusting the water quality, water quantity and pH value of the wastewater.

The middle and lower part of the aerobic contact oxidation tank is provided with a water inlet pipe, and the lower part of the water inlet pipe is provided with a water distribution triangle cone; the lower part of the water distribution triangle cone is provided with an aeration control system, and the aeration control system includes an aeration plate , a blower and a dissolved oxygen measurement and control device; further, the aeration pan is a microporous aeration pan with micropores evenly arranged thereon, and the aeration pan is connected to the blower through an aeration tube, and the blower is arranged at the aerobic contact oxidation Outside the pool, a dissolved oxygen measurement and control device is installed on the upper part of the aerobic contact oxidation tank and under the water surface of the wastewater. The dissolved oxygen measurement and control device regulates the work of the blower according to the oxygen capacity; the upper part of the water inlet pipe is filled with fillers; the aerobic contact oxidation An overflow weir is arranged at the water outlet of the pool; a conical upper cover is provided on the top of the aerobic contact oxidation tank, and the top of the conical upper cover is equipped with an odor collection pipe and a fan, and the fan is connected to the odor treatment system.

The outlet pipe of the aerobic contact oxidation tank is connected to the secondary sedimentation tank, and the bottom of the secondary sedimentation tank is provided with a sludge return discharge system, and a part of the sludge is returned to the packing type anoxic anaerobic reaction tank and the aerobic contact oxidation tank, and a part of the sludge is It is discharged to the solid waste mixing tank as excess sludge.

The water after sedimentation treatment in the secondary settling tank enters the counterflow biological aerated filter through the overflow weir.

The upper part of the counterflow biological aerated filter is cylindrical, and the lower part is a conical structure, including a downstream area, an upstream area and a sludge area; the downstream area is located in the cylindrical structure of the countercurrent biological aerated filter The middle part is a cylindrical structure, the upper part of the downstream area is provided with water inlet pipes and water distribution pipes, the middle part of the downstream area is provided with fillers, and the lower part of the downstream area is provided with aeration pipes; the bottom of the downstream area is provided with baffles, and the baffle The longitudinal section of the flow plate is trumpet-shaped; the upper flow area is located at the periphery of the lower flow area and the upper part of the baffle, the middle of the upper flow area is provided with filler, the lower part is provided with an aeration pipe, and the outlet of the upper part of the upper flow area is provided with an overflow weir; The sludge area is located at the bottom of the reverse flow biological aerated filter, the lower part of the downstream area and the upper area, and the bottom of the sludge area is provided with a sludge discharge valve.

The water treated by the reverse flow biological aerated filter enters the clear water tank for reuse.

The solid waste treatment system includes a solid waste mixing tank and a composting tank; the top of the solid waste mixing tank and the composting tank is provided with a conical upper cover, and a fan is placed on the top of the conical upper cover, and the fan collects odor through the The pipeline is connected to the odor treatment system.

The odor treatment system includes an odor collection pipe, a fan and an odor alkalization absorption pool.

A method for waste treatment using the above-mentioned pig farm waste treatment device has the following steps:

①Wastewater from the wastewater collection tank enters the lower part of the filled anoxic anaerobic reaction tank through the inlet pipe of the aerobic section of the filled anoxic anaerobic reaction tank; after entering the filled anoxic anaerobic reaction tank, the wastewater goes up and down along the baffle Go forward and pass through the sludge bed of each reaction chamber in the facultative, anoxic and anaerobic sections in turn. The sludge in the reaction tank moves with the up and down flow of wastewater and the rise of biogas, and the blocking of baffles The action and the sedimentation of the sludge itself reduce the flow rate of the sludge, so a large amount of sludge is trapped in the reaction tank, and the microorganisms in the reaction tank fully contact with the organic matter in the wastewater. The facultative bacteria in the facultative stage, the heterotrophic bacteria in the anoxic stage and the anaerobic stage hydrolyze the organic matter in the wastewater into organic acids, decompose the macromolecular organic matter into small molecular organic matter, and convert the insoluble organic matter into soluble organic matter; anaerobic reaction The final waste water is separated from mud, water and methane by a three-phase separator at the end of the anaerobic section, and the sludge sinks to the lower part of the packed anoxic anaerobic reaction tank under the action of gravity. It is discharged through the sludge discharge valve at the bottom; the methane waste gas generated by the packed anoxic anaerobic reaction tank is collected and discharged through the gas collection pipe on the top of the reaction tank; the treated wastewater enters the wastewater regulating tank through the overflow weir, outlet pipe and connecting pipe.

②Wastewater from the packed anoxic anaerobic reaction tank and the wastewater collection tank enters the wastewater regulating tank through the water inlet pipe at a volume ratio of 6:4 to adjust the carbon, nitrogen, phosphorus ratio of the wastewater, the biodegradability of the wastewater and the pH of the wastewater value.

③Wastewater adjustment tank The wastewater after adjustment and treatment enters the middle and lower part of the aerobic contact oxidation tank through the water inlet pipe, and the water is evenly distributed under the action of the water distribution triangle cone. The aeration pan generates a large number of microbubbles, and the dissolved oxygen measurement and control device regulates the work of the blower according to the oxygen capacity to ensure that the dissolved oxygen in the water of the aerobic contact oxidation pool is greater than 2 mg/L, and the treated wastewater passes through the overflow weir and the outlet pipe flow out.

④ The outlet pipe of the aerobic contact oxidation tank is connected to the water distribution pipe of the secondary settling tank. Part of the sedimented sludge in the secondary settling tank flows back to the packed anoxic anaerobic reaction tank and the aerobic contact oxidation tank, and part of it is discharged into the solid as residual sludge. Waste mixing pool.

⑤The water after the sedimentation treatment in the secondary settling tank enters the downstream area of the reverse flow biological aerated filter through the overflow weir, water inlet pipe and water distribution pipe. The waste water is filtered, and the waste water enters the upstream area after passing through the baffle plate, and biochemical reactions occur in the packing, and at the same time, the packing filters the waste water, and the sludge produced in the downstream area and the upstream area sinks to the sludge area, and passes through the bottom of the sludge area. The sludge discharge valve is discharged, and the water treated by the reverse flow biological aerated filter enters the clear water tank for reuse through the overflow weir.

⑥ The remaining sludge produced by the packing type anoxic anaerobic reaction tank, the secondary sedimentation tank and the reverse flow biological aerated filter is discharged into the solid waste mixing tank and mixed with pig manure, etc., and then enters the composting tank. The aerobic composting treatment The product is used as agricultural fertilizer.

⑦ Odor produced by breeding workshop, aerobic contact oxidation tank, solid waste mixing tank and composting tank is discharged to the odor alkalization absorption tank by the fan through the odor collection pipe.

⑧After the odor enters the odor alkalinization absorption pool, the pollutants in the gas react with lye such as sodium hydroxide, and the odor is processed into clean gas to achieve standard discharge.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic structural diagram of a packed anoxic anaerobic reaction tank according to an embodiment of the present invention.

Among Fig. 1: 1. packing type anoxic anaerobic reaction tank, 1-1. baffle plate, 1-2. concurrent oxygen section, 1-3. anoxic section, 1-4. anaerobic section, 1-5 .Packing type anoxic anaerobic reaction tank inlet pipe, 1-6. Packing type anoxic anaerobic reaction tank three-phase separator, 1-7. Packing type anoxic anaerobic reaction tank overflow weir, 1-8. Sludge Discharge valve, 1-9. upper cover, 1-10. air collecting pipe, 1-11. packing.

Fig. 2 is a schematic structural diagram of an aerobic contact oxidation tank according to an embodiment of the present invention.

In Fig. 2: 2. Aerobic contact oxidation tank, 2-1. Aerobic contact oxidation tank inlet pipe, 2-2. Water distribution triangle cone, 2-3. Aeration control system, 2-4. Filler, 2- 5. Aerobic contact oxidation tank overflow weir, 2-6. Conical upper cover, 2-7. Odor gas collecting pipe.

Fig. 3 is a structural schematic diagram of a reverse flow biological aerated filter according to an embodiment of the present invention.

Among Fig. 3: 3. counterflow biological aerated filter, 3-1. downstream area, 3-2. upper flow area, 3-3. sludge area, 3-4. countercurrent biological aerated filter enters Water pipes, 3-5. Counterflow biological aerated filter water distribution pipes, 3-6. Filling in the downstream area, 3-7. Aeration pipes, 3-8. Baffles, 3-9. Filling in the upstream area, 3 -10. Counterflow biological aerated filter overflow weir, 3-11. Sludge discharge valve.

Fig. 4 is a process flow diagram of an embodiment of the present invention.

detailed description

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

Example

As shown in Figures 1 to 4, a pig farm waste treatment device according to the present invention includes a waste water treatment system, a solid waste treatment system and an odor treatment system.

The wastewater treatment system includes a wastewater collection tank, a packing type anoxic anaerobic reaction tank 1, a wastewater regulating tank, an aerobic contact oxidation tank 2, a secondary sedimentation tank, a reverse flow biological aerated filter tank 3 and a clear water tank; The waste water collection tank, the packing type anoxic anaerobic reaction tank 1, the waste water regulating tank, the aerobic contact oxidation tank 2, the secondary sedimentation tank, the reverse flow biological aerated filter tank 3 and the clean water tank are connected in sequence.

The packing type anoxic anaerobic reaction tank 1 comprises a concurrent oxygen section 1-2, anoxic section 1-3 and anaerobic section 1-4 separated by a baffle plate 1-1, and the concurrent oxygen section 1- 2 The head end is provided with an inlet pipe 1-5 for feeding waste water, the end of the anoxic section 1-2 is connected to the head end of the anoxic section 1-3, and the end of the anoxic section 1-3 is connected to the head end of the anaerobic section 1-4 The anoxic section 1-3 and the anaerobic section 1-4 are provided with a 45-degree corner at the lower part of the baffle on the water inlet side to avoid the impact of the water flow when it enters, thereby buffering the water flow and evenly The role of water distribution; the end of the anaerobic section 1-4 is provided with a three-phase separator 1-6 and an overflow weir 1-7, and the overflow weir 1-7 is connected to the outlet pipe; the anaerobic section 1-2, anoxic section 1- 3 and the bottom of the anaerobic section 1-4 are designed into a conical structure, and the conical structure is connected to the sludge discharge valve 1-8; The upper cover 1-9 is designed as a conical structure, and the top of the conical structure is provided with a methane waste gas collection pipe 1-10; the aerobic section, the anoxic section and the anaerobic section are all provided with fillers 1-11.

The wastewater regulating tank includes a water inlet pipe and an outlet pipe for adjusting the water quality, water quantity and pH value of the wastewater.

The middle and lower part of the aerobic contact oxidation tank 2 is provided with a water inlet pipe 2-1, and the lower part of the water inlet pipe 2-1 is provided with a water distribution triangle cone 2-2; the lower part of the water distribution triangle cone 2-2 is provided with an exposure Gas control system 2-3, the aeration control system 2-3 includes an aeration pan, a blower and a dissolved oxygen measurement and control device; further, the aeration pan is a microporous aeration pan with micropores evenly arranged . The aeration pan is connected to a blower through an aeration pipe, and the blower is arranged outside the aerobic contact oxidation tank, and a dissolved oxygen measurement and control device is installed on the upper part of the aerobic contact oxidation tank and under the wastewater surface, and the dissolved oxygen measurement and control device is based on the oxygen capacity. Regulate the blower to work; the upper part of the water inlet pipe has a filler 2-4; the outlet of the aerobic contact oxidation tank is equipped with an overflow weir 2-5; the top of the aerobic contact oxidation tank is provided with a conical upper cover 2-6, the top of the conical upper cover is arranged with the odor collection pipe 2-7 and the fan, and the fan is connected to the odor treatment system. .

The outlet pipe of the aerobic contact oxidation tank 2 is connected to the secondary sedimentation tank, and the bottom of the secondary sedimentation tank is provided with a sludge return discharge system, and a part of the sludge returns to the packing type anoxic anaerobic reaction tank 1 and the aerobic contact oxidation tank 2, Part of the sludge is discharged to the solid waste mixing tank as residual sludge.

The water after sedimentation treatment in the secondary settling tank enters the counterflow biological aerated filter 3 through the overflow weir.

The middle and upper part of the counterflow biological aerated filter 3 is cylindrical, and the lower part is a conical structure, including a downstream area 3-1, an upstream area 3-2 and a sludge area 3-3; the downstream area 3- 1. It is located in the middle of the cylindrical structure of the reverse flow biological aerated filter. The lower part is provided with an aeration pipe 3-7, and the bottom of the downstream area is provided with a baffle plate 3-8, and the longitudinal section of the baffle plate 3-8 is trumpet-shaped; the upstream area 3-2 is located at the downstream The periphery of the area 3-1, the upper part of the baffle, the middle part of the upstream area is provided with a filler 3-9, the lower part is provided with an aeration pipe, and the outlet of the upper part of the upstream area is provided with an overflow weir 3-10; the sludge area 3 -3 is located at the bottom of the counterflow biological aerated filter, the lower part of the downstream area and the upper area, and the bottom of the sludge area is provided with a sludge discharge valve 3-11.

The water treated by the reverse flow biological aerated filter enters the clear water tank for reuse.

The solid waste treatment system includes a solid waste mixing tank and a composting tank; the top of the solid waste mixing tank and the composting tank is provided with a conical upper cover, and a fan is placed on the top of the conical upper cover, and the fan collects odor through the The pipeline is connected to the odor treatment system.

The odor treatment system includes an odor collection pipe, a fan and an odor alkalization absorption pool.

A method for waste treatment using the above-mentioned pig farm waste treatment device has the following steps:

①Wastewater from the wastewater collection tank enters the lower part of the filled anoxic anaerobic reaction tank 1 through the inlet pipe 1-5 of the aerobic section of the filled anoxic anaerobic reaction tank; Advance up and down along the baffle plate 1-1, and pass through the sludge bed of each reaction chamber of the facultative section 1-2, anoxic section 1-3 and anaerobic section 1-4 in turn, and the sludge in the reaction tank The up and down flow of wastewater and the rising of biogas move, the blocking effect of filler and baffle 1-1 and the sedimentation of sludge itself reduce the flow rate of sludge, so a large amount of sludge is trapped in the reaction tank , The microorganisms in the reaction tank are in full contact with the organic matter in the wastewater. The facultative bacteria in the facultative stage 1-2, the heterotrophic bacteria in the anoxic stage 1-3 and the anaerobic stage 1-4 hydrolyze the organic matter in the wastewater into organic acids, and decompose the macromolecular organic matter into small molecular organic matter. Organic matter is converted into soluble organic matter; after anaerobic reaction, the three-phase separator 1-6 at the end of the anaerobic section realizes the separation of mud, water, and methane gas, and the sludge sinks to the packing type under the action of gravity. In the lower part of the aerobic anaerobic reaction tank, the excess sludge is discharged through the sludge discharge valve 1-8 at the bottom; the methane waste gas generated by the packed anoxic anaerobic reaction tank is collected and utilized through the gas collecting pipe at the top of the reaction tank 1-10; The final waste water enters the waste water regulating tank through the overflow weir 1-7, the outlet pipe and the connecting pipe.

②Wastewater from the packed anoxic anaerobic reaction tank and the wastewater collection tank enters the wastewater regulating tank through the water inlet pipe at a volume ratio of 6:4 to adjust the carbon, nitrogen, phosphorus ratio of the wastewater, the biodegradability of the wastewater and the pH of the wastewater value.

③Waste water adjusted and treated by the wastewater regulating tank enters the middle and lower part of the aerobic contact oxidation tank 2 through the water inlet pipe 2-1, and the water is evenly distributed under the action of the water distribution triangle cone 2-2, and the aeration disc is evenly arranged The microporous aeration disc with micropores produces a large number of microbubbles. The dissolved oxygen measurement and control device regulates the work of the blower according to the oxygen capacity to ensure that the dissolved oxygen in the aerobic contact oxidation pool is greater than 2mg/L. The treated wastewater Flow out through the overflow weir 2-5 and the outlet pipe.

④ The outlet pipe of the aerobic contact oxidation tank 2 is connected to the water distribution pipe of the secondary sedimentation tank, and part of the sedimentation sludge in the secondary sedimentation tank flows back to the packed anoxic anaerobic reaction tank 1 and the aerobic contact oxidation tank 2, and part of it is used as excess sludge Discharge into solid waste mixing tank.

⑤The water after the sedimentation treatment in the secondary settling tank enters the downstream area 3-1 of the baffle type biological aerated filter through the overflow weir, the water inlet pipe 3-4 and the water distribution pipe 3-5, and the air produced by the aeration pipe 3-7 and the The waste water meets in the filler 3-6 and undergoes biochemical reactions. At the same time, the filler 3-6 filters the waste water. After passing through the baffle plate 3-8, the waste water enters the upstream area 3-2. Biochemical reactions occur in the filler 3-9. At the same time, the filler 3-9 filters the waste water, and the sludge produced in the downstream area 3-1 and the upstream area 3-2 sinks to the sludge area 3-3, and is discharged through the sludge discharge valve 3-11 at the bottom of the sludge area, and the reverse The water treated by the flow-type biological aerated filter 3 enters the clear water tank for reuse through the overflow weir 3-10.

⑥ The remaining sludge produced by the packing type anoxic anaerobic reaction tank 1, the secondary sedimentation tank and the reverse flow biological aerated filter 3 is discharged into the solid waste mixing tank, mixed with pig manure, etc., and then enters the composting tank for aerobic composting The processed product is used as agricultural fertilizer.

⑦Odor produced by breeding workshop, aerobic contact oxidation tank 2, solid waste mixing tank and compost tank is discharged by fan through odor collection pipe to odor alkalization absorption tank.

⑧After the odor enters the odor alkalinization absorption pool, the pollutants in the gas react with lye such as sodium hydroxide, and the odor is processed into clean gas to achieve standard discharge.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (2)

1. a pig farm waste treatment apparatus, it is characterised in that: include Waste Water Treatment, solid waste treatment system and stench processing system；

Described Waste Water Treatment includes wastewater collection pond, material filling type anoxia anaerobic reation pool (1), wastewater equalization pond, aerobic contact oxidation pond (2), second pond, reflux formula BAF (3) and clear water reserviors；Described wastewater collection pond, material filling type anoxia anaerobic reation pool (1), wastewater equalization pond, aerobic contact oxidation pond (2), second pond, reflux formula BAF (3) and clear water reserviors are sequentially communicated；

Described material filling type anoxia anaerobic reation pool (1) includes the double oxygen section (1-2), anoxia section (1-3) and the anaerobism section (1-4) that are separated into by deflection plate (1-1), described double oxygen section (1-2) head end is provided with the water inlet pipe (1-5) for feeding waste water, oxygen section (1-2) end of holding concurrently connects with anoxia section (1-3) head end, and anoxia section (1-3) end connects with anaerobism section (1-4) head end；The bottom of the water inlet side deflection plate of described anoxia section (1-3) and anaerobism section (1-4) is provided with the corner of 45 degree；Anaerobism section (1-4) end is provided with three phase separator (1-6) and overfalling weir (1-7), and overfalling weir (1-7) connects outlet pipe；Described double oxygen section (1-2), anoxia section (1-3) and the tapered structure of anaerobism section (1-4) bottom design, pyramidal structure connects mud discharging valve (1-8)；The upper cover (1-9) of the double oxygen section of described material filling type anoxia anaerobic reation pool, anoxia section and anaerobism section is designed to conical structure, and conical structure top is provided with methane waste product discharge (1-10)；It is designed with filler (1-11) in described double oxygen section, anoxia section and anaerobism section；

Described wastewater equalization pond includes water inlet pipe and outlet pipe, for regulating the water quality of waste water, the water yield and pH value；

The interior middle and lower part of described aerobic contact oxidation pond (2) arranges water inlet pipe (2-1), and described water inlet pipe (2-1) bottom is provided with water distribution pyrometric cone (2-2)；Described water distribution pyrometric cone (2-2) bottom is provided with aeration regulator control system (2-3), and described aeration regulator control system (2-3) includes aeration plate, aerator and dissolved oxygen sensing regulation device；Further, described aeration plate is the pore type aeration plate being evenly arranged with micropore；Described aeration plate connects aerator by aeration tube, aerator is arranged on outside aerobic contact oxidation pond, the top in aerobic contact oxidation pond, waste water underwater arrange dissolved oxygen sensing regulation device, and described dissolved oxygen sensing regulation device regulates and controls aerator work according to oxygen capacity；Described water inlet pipe top is built-in with filler (2-4)；The exit in described aerobic contact oxidation pond is laid with downflow weir (2-5)；The top in described aerobic contact oxidation pond is provided with cone upper cover (2-6), and cone upper cover top disposes foul smell discharge (2-7) and blower fan, blower fan connection stench processing system；

The outlet pipe of described aerobic contact oxidation pond (2) connects second pond, sludge reflux exhaust system it is provided with bottom second pond, a part of sludge reflux is to material filling type anoxia anaerobic reation pool (1) and aerobic contact-oxidation pool (2), and a part of mud is discharged into solid waste mixing pit as excess sludge；

Water after sedimentation in secondary sedimentation tank process enters reflux formula BAF (3) through downflow weir；

The middle and upper part of described reflux formula BAF (3) is conical structure for cylindrical, bottom, including lower current area (3-1), ascending zone (3-2) and mud district (3-3)；Described lower current area (3-1) is positioned at the middle part of the cylindrical structural of reflux formula BAF, for cylindrical structural, lower current area top is provided with water inlet pipe (3-4) and water distributor (3-5), filler (3-6) it is provided with in the middle part of lower current area, lower current area bottom is provided with aeration tube (3-7), the bottom of described lower current area is provided with deflection plate (3-8), and the vertical section of described deflection plate (3-8) is horn-like；Described ascending zone (3-2) is positioned at the top of the periphery of lower current area (3-1), deflection plate, is provided with filler (3-9) in the middle part of ascending zone, and bottom is provided with aeration tube, and the exit on ascending zone top is provided with overfalling weir (3-10)；Described mud district (3-3) is positioned at the bottom of the bottom of reflux formula BAF, lower current area and ascending zone, and the bottom in mud district is provided with mud discharging valve (3-11)；

Water after reflux formula BAF (3) process enters clear water reserviors reuse；

Described solid waste treatment system includes solid waste mixing pit and compost pond；The top in described solid waste mixing pit and compost pond is provided with cone upper cover, and cone upper cover top disposes blower fan, and blower fan is by foul smell collection conduit connection stench processing system；

Described stench processing system includes foul smell collecting pipe, blower fan and foul smell alkalization absorption cell.

2. the method adopting pig farm as claimed in claim 1 waste treatment apparatus to carry out offal treatment, has following steps:

1. the bottom of material filling type anoxia anaerobic reation pool (1) is entered from the waste water in wastewater collection pond by the hold concurrently water inlet pipe (1-5) of oxygen section of material filling type anoxia anaerobic reation pool；Waste water enters material filling type anoxia anaerobic reation pool (1) tailing edge deflection plate (1-1) and advances up and down, passing sequentially through the Sludge Bed of each reative cell of double oxygen section (1-2), anoxia section (1-3) and anaerobism section (1-4), the microorganism in reaction tank is fully contacted with the Organic substance in waste water；Hydrolysis of organic matter in waste water is organic acid, makes larger molecular organics be decomposed into small organic molecule, and insoluble Organic substance changes into dissolved organic matter；Waste water after anaerobic reaction realizes the separation of mud, water, methane gas at the three phase separator (1-6) that anaerobism section end is provided with, mud sinks to the bottom of material filling type anoxia anaerobic reation pool under gravity, and unnecessary mud is discharged by the mud discharging valve (1-8) of bottom；The methane waste product that material filling type anoxia anaerobic reation pool produces is collected by reaction tank top discharge (1-10)；Waste water after process enters wastewater equalization pond by overfalling weir (1-7), outlet pipe and connecting tube；

2. enter wastewater equalization pond according to the ratio of volume 6:4 by water inlet pipe from the waste water in material filling type anoxia anaerobic reation pool (1) and wastewater collection pond, regulate the biodegradability of the carbon of waste water, nitrogen, phosphorus ratio and waste water and the pH value of waste water；

3. the waste water after wastewater equalization pond adjustment process enters the middle and lower part of aerobic contact oxidation pond (2) by water inlet pipe (2-1), water distribution uniformity under the effect of water distribution pyrometric cone (2-2), described aeration plate produces substantial amounts of microbubble, described dissolved oxygen sensing regulation device regulates and controls aerator work according to oxygen capacity, and the waste water after process is flowed out by downflow weir (2-5) and outlet pipe；

4. the outlet pipe of aerobic contact oxidation pond (2) connects the water distributor of second pond, the a part of sludge reflux of precipitating sludge of second pond is to material filling type anoxia anaerobic reation pool (1) and aerobic contact-oxidation pool (2), and a part enters solid waste mixing pit as excess sludge；

5. the water after sedimentation in secondary sedimentation tank process is through downflow weir, water inlet pipe (3-4) and water distributor (3-5) enter the lower current area (3-1) of baffling aeration biological filter chamber, the air that aeration tube (3-7) produces and waste water cross generation biochemical reaction in filler (3-6), waste water is filtered by filler (3-6) simultaneously, waste water enters ascending zone (3-2) afterwards by deflection plate (3-8), filler (3-9) occurs biochemical reaction, waste water is filtered by filler (3-9) simultaneously, the mud that lower current area (3-1) and ascending zone (3-2) produce sinks to mud district (3-3), emitted by the mud discharging valve (3-11) bottom mud district, water after reflux formula BAF (3) process enters clear water reserviors reuse by overfalling weir (3-10)；

6. the excess sludge that material filling type anoxia anaerobic reation pool (1), second pond and reflux formula BAF (3) produce enters solid waste mixing pit, entering compost pond with swine excrement after mixing, the product after aerobic compost process is as agricultural fertilizer；

7. the foul smell that cultivating workshop, aerobic contact oxidation pond (2), solid waste mixing pit, compost pond produce is discharged into foul smell alkalization absorption cell by blower fan by foul smell collection conduit；

8., after foul smell enters foul smell alkalization absorption cell, the polluter in gas and alkali liquor generation chemical reaction, foul smell is processed into the gas of cleaning, it is achieved qualified discharge.