CN212982739U - Pretreatment system for livestock breeding sewage - Google Patents

Abstract

The utility model discloses a pretreatment systems for livestock-raising sewage, including the cistern, above-mentioned cistern one side is equipped with the septic tank, above-mentioned cistern is linked together with the septic tank, above-mentioned septic tank communicates the anaerobism pond in proper order, the oxygen deficiency pond, good oxygen pond and sedimentation tank, above-mentioned sedimentation tank one side is equipped with the sludge pump, above-mentioned sludge pump head end communicates the sedimentation tank bottom, the terminal intercommunication anaerobism pond of above-mentioned sludge pump, the terminal intercommunication advanced treatment pond of above-mentioned sedimentation tank, be arranged in discharging sewage by the advanced treatment pond to secondary treatment in the conventional treatment facility, it is low to livestock-raising sewage treatment effect to expect to optimize current conventional sewage treatment system, lead to the great problem of the livestock-raising sewage treatment degree of difficulty.

Description

Pretreatment system for livestock breeding sewage

Technical Field

The utility model relates to a livestock-raising environmental treatment, concretely relates to a pretreatment systems for livestock-raising sewage.

Background

The main application field of the cultivation sewage treatment equipment in the current market is in traditional centralized treatment, the equipment has large occupied area, a large amount of land required by construction is matched, the construction cost is high, more importantly, the water quality of a general small-sized sewage system can hardly reach the discharge standard after the sewage is treated.

Current breed sewage treatment device generally transports livestock-raising sewage directly to the sewage treatment station and handles, and the impurity content of livestock-raising sewage is higher on the one hand, and on the other hand, the sewage treatment station can only handle partial breed sewage usually, can not satisfy a large amount of breed sewage condition that need handle far away.

Meanwhile, the existing aquaculture sewage treatment mode is basically that aquaculture sewage is directly connected into a sewage treatment system. Because the treatment capacity of the existing sewage treatment system has the accepting limit, the livestock sewage is directly treated by using the conventional sewage treatment system, harmful substances in the sewage cannot be removed to the maximum extent, the sewage treatment effect of treatment equipment is not ideal, the difficulty of the existing sewage treatment system in livestock sewage treatment is large, and the discharged sewage generally does not reach the standard or reaches the minimum standard degree, so that how to optimize the treatment mode of the livestock sewage is worthy of research by matching with the conventional treatment equipment to improve the sewage treatment quality.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pretreatment systems for livestock-raising sewage to it is low to livestock-raising sewage treatment effect to expect to optimize current conventional sewage treatment system, leads to the great problem of the livestock-raising sewage treatment degree of difficulty.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a pretreatment systems for livestock-raising sewage, includes the cistern, and above-mentioned cistern one side is equipped with the septic tank, and above-mentioned cistern is linked together with the septic tank, and above-mentioned septic tank communicates anaerobism pond, oxygen deficiency pond, good oxygen pond and sedimentation tank in proper order, and above-mentioned sedimentation tank one side is equipped with the sludge pump, and above-mentioned sludge pump head end communicates the sedimentation tank bottom, the terminal intercommunication anaerobism pond of above-mentioned sludge pump, the terminal intercommunication advanced treatment pond of above-mentioned sedimentation tank for discharge sewage secondary treatment in the conventional treatment facility by the advanced treatment pond.

Preferably, the upper end of the anaerobic tank is provided with a gas collecting pipe, the bottom of the anaerobic tank is provided with a sludge slope, the height of the sludge slope is provided with a water inlet pipe, the upper part of the anaerobic tank is provided with a water outlet pipe, the bottom of the sludge slope is provided with a sludge discharge pipeline, and the upper end of the anaerobic tank is communicated with a conveying pipeline of a sludge pump, is communicated with the septic tank through the water inlet pipe and is communicated with the anoxic tank through the water outlet pipe.

Preferably, a stirrer is arranged in the anoxic tank, the lower end of the anoxic tank is communicated with the lower end of the aerobic tank, biological fillers are arranged in the aerobic tank, an aerator is arranged at the bottom of the aerobic tank, and the upper part of the anoxic tank is communicated with a conveying pipeline of a water pump.

The further technical scheme is that the anoxic tank and the aerobic tank are integrally arranged, a partition wall is arranged between the anoxic tank and the aerobic tank, and the partition wall is provided with a circulation port.

Preferably, the sedimentation tank is provided with a first feeding pipe and a second feeding pipe for respectively feeding PAC and PAM through the first feeding pipe and the second feeding pipe.

Preferably, the advanced treatment tank comprises a partition plate, a circulation gap is reserved between the lower end of the partition plate and the bottom of the advanced treatment tank, a first filter screen and a second filter screen are arranged at two ends of the partition plate respectively, and an inlet and an outlet of the advanced treatment tank are arranged above the first filter screen and the second filter screen respectively, so that primary filtration is performed by the first filter screen, and secondary filtration is performed by the second filter screen.

Preferably, the septic tank comprises a first-stage septic tank, a second-stage septic tank and a third-stage septic tank, an inlet is formed in the upper end of the first-stage septic tank, the first-stage septic tank and the second-stage septic tank are communicated through an inclined pipe, the second-stage septic tank and the third-stage septic tank are communicated through an inclined pipe, and an outlet is formed in the upper portion of the third-stage septic tank.

Preferably, the outlet end of the reservoir is provided with an electromagnetic valve, the reservoir is provided with a liquid level sensor, and the liquid level sensor is in signal connection with the electromagnetic valve control unit and used for releasing sewage in the reservoir according to a liquid level signal collected by the liquid level sensor through the electromagnetic valve control unit.

Compared with the prior art, the beneficial effects of the utility model are one of following at least:

the utility model discloses can establish in the livestock-raising district, through the utility model discloses carry out primary treatment to sewage, drop into sewage again and handle in the current sewage treatment system, reduce current sewage treatment system's burden, harmful substance in the sewage can be dispelled as far as simultaneously.

The utility model discloses a solid sediment in the poultry sewage is deposited to the septic tank, reduces the influence factor of solid sediment to water quality treatment, carries out A2O technology through anaerobism pond, oxygen deficiency pond and good oxygen pond, has carried out a large amount of reproductions with the fungus class in the sewage, provides a large amount of fungus class and fungus class living environment for the advanced treatment in later stage. A large amount of sediment substances in the water body are effectively precipitated through the sedimentation tank, and the most favorable foundation and possibility are laid for the later conventional water treatment.

The utility model discloses a degree of chroma, heavy metal, disinfection accessory substance, chlorinated organic matter, pesticide, radioactive organic matter in the sewage are reduceed once more to the advanced treatment pond.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view of the connection of the anaerobic tank, the anoxic tank and the aerobic tank.

Fig. 3 is the structural schematic diagram of the advanced treatment tank of the present invention.

Fig. 4 is a schematic view of the septic tank structure of the utility model.

Description of reference numerals:

1-water reservoir, 2-septic tank, 3-anaerobic tank, 4-anoxic tank, 5-aerobic tank, 6-sedimentation tank, 7-sludge pump, 8-water pump, 9-advanced treatment tank, 201-first-stage septic tank, 202-second-stage septic tank, 203-third-stage septic tank, 301-gas collecting pipe, 302-sludge slope, 303-water inlet pipe, 304-water outlet pipe, 305-sludge discharge pipeline, 401-stirrer, 501-biological filler, 502-aerator, 503-partition wall, 504-circulation port, 601-first feeding pipe, 602-second feeding pipe, 901-partition plate, 902-first filter screen and 903-second filter screen.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, an embodiment of the present invention is, a pretreatment system for livestock breeding sewage, including reservoir 1, wherein reservoir 1 is the current effluent water sump, collect and deposit the sewage that the livestock raising area produced through reservoir 1, because the pollution load of livestock raising sewage itself is higher, high concentration livestock raising sewage N, P content is huge, the carbohydrate content in the livestock raising sewage is higher simultaneously, open-air is stacked and can be formed the foul smell of high concentration and be, pollute the atmosphere, direct discharge can lead to the water eutrophication, seriously influence the normal ecology of aquatic organism in the river. Thus, the reservoir 1 is typically buried underground or stored in tanks.

One side of the impounding reservoir 1 is provided with a septic tank 2, and the septic tank 2 can adopt a filled cement tank or a glass fiber reinforced plastic tank body in the same way as the impounding reservoir 1. The reservoir 1 is communicated with the septic tank 2, wherein the septic tank 2 can be the existing septic tank, the livestock sewage is subjected to early standing separation through the septic tank 2, large-particle substances in the livestock sewage are settled, and the influence of the large-particle substances on subsequent treatment is avoided.

The septic tank 2 is sequentially communicated with an anaerobic tank 3, an anoxic tank 4, an aerobic tank 5 and a sedimentation tank 6, wherein the sedimentation tank 6 is mainly used for standing and sedimentation, livestock wastewater fed from the livestock wastewater is separated into three layers, namely a saltpeter layer, a middle layer and a sludge layer, and saltpeter water substances with low specific gravity or flocs carrying bubbles are upwards suspended to form a saltpeter layer. Sludge substances with larger specific gravity are precipitated at the bottom to form a sludge layer; the liquid in the middle layer is a sewage liquid component and needs to enter a subsequent treatment unit for further treatment.

6 one sides of above-mentioned sedimentation tank are equipped with sludge pump 7 and water pump 8, wherein water pump 8 and sludge pump 7 are current commodity, 6 bottoms of above-mentioned sludge pump 7 head end intercommunication sedimentation tank, 7 end intercommunication anaerobism ponds 3 of above-mentioned sludge pump, wherein anaerobism pond 3 makes poultry sewage be under the anaerobic condition, utilize the organic matter degradation of anaerobism microorganism in with poultry sewage, effectively detach the BOD in the poultry sewage, wherein sludge pump 7 pours into anaerobism pond 3 with the mud of the deposit in sedimentation tank 6 into, effectively improve the sludge concentration of oxygen deficiency pond 3, can reduce the volume of oxygen deficiency pond 3, the nitrate nitrogen in the sewage can play the effect of denitrogenation in oxygen deficiency pond 3, be convenient for keep the basicity of 3 play waters in the anaerobism pond, the effectual oxygen demand that reduces poultry sewage and carry out the aerobic treatment in-process in aerobic pond 5.

The head end of the water pump 8 is communicated with the upper part of the sedimentation tank 6, the tail end of the water pump 8 is communicated with the anoxic tank 4, and the tail end of the sedimentation tank 6 is communicated with the advanced treatment tank 9 and used for discharging sewage from the advanced treatment tank 9 to conventional treatment equipment for secondary treatment.

The water pump 8 conveys the substances in the nitrate water layer to the anoxic tank 4, so that the excessive nitrate nitrogen in the nitrate water layer is effectively prevented from entering the anaerobic tank 3 to compete with the phosphorus-releasing bacteria for a carbon source, and the excessive nitrate nitrogen is prevented from flowing into the aerobic tank 5 to reduce the denitrification effect in the aerobic tank 5, so that the substances in the nitrate water layer are conveyed to the anoxic tank 4, on one hand, the backflow nitrate nitrogen is effectively utilized to ensure the hydrolysis reaction to be normally carried out, and on the other hand, the energy consumption of each tank is reduced.

Wherein, the advanced treatment tank 9 mainly utilizes an activated carbon adsorption method to remove heavy metals, disinfection byproducts, chlorinated organic matters, pesticides and radioactive organic matters with high concentration in the livestock wastewater, and simultaneously reduces the chroma and the odor of the wastewater, so as to optimize the livestock wastewater, reduce the water quality of the wastewater in a common wastewater state, and effectively reduce the risk that the conventional wastewater treatment equipment cannot effectively treat the high-concentration wastewater.

When partial pond group adopted the glass steel, can also put up fast in the poultry region to in the cycle of sewage output, carry out preliminary treatment, reduce poultry sewage and the fermentation decomposition phenomenon appears before batch processing, reduce poultry sewage bad production mosquito and bacterium mass propagation and the epidemic disease spreading risk appears.

Based on the above-mentioned embodiment, refer to fig. 2 and show, another embodiment of the utility model is that, above-mentioned 3 upper ends in anaerobism pond are equipped with gas collecting pipe 301, because anaerobism pond 3 directly docks septic tank 2, contains the nitric acid composition in its poultry sewage, and the fermentation gas that anaerobism pond 3 produced is collected by gas collecting pipe 301, is convenient for carry out secondary resource utilization.

The bottom of the anaerobic tank 3 is provided with a sludge slope 302, a water inlet pipe 303 is arranged at the high position of the sludge slope 302, the anaerobic tank 3 returns sludge through a sludge pump 7, and in order to avoid the sludge from blocking the water inlet pipe 303, the water inlet pipe 303 is arranged at the high position of the sludge slope 302, the sludge is guided to the bottom of the sludge slope 302 along with the sludge slope 302, the upper part of the anaerobic tank 3 is provided with a water outlet pipe 304, the bottom of the sludge slope 302 is provided with a sludge discharge pipeline 305, and a user can conveniently discharge the sludge in the anaerobic tank 3 from the anaerobic tank 3 through the sludge discharge pipeline. The upper end of the anaerobic tank 3 is communicated with a conveying pipeline of a sludge pump 7, and is used for being communicated with the septic tank 2 through a water inlet pipe 303 and being communicated with the anoxic tank 4 through a water outlet pipe 304.

Based on the above embodiment, referring to fig. 2 again, another embodiment of the present invention is that an agitator 401 is provided in the anoxic tank 4, the sewage in the anoxic tank 4 is agitated by the agitator 401, the lower end of the anoxic tank 4 is communicated with the lower end of the aerobic tank 5, and the anoxic tank 4 is communicated with the aerobic tank 5, so that when the anoxic tank 4 is agitated, the agitation aeration amount is not too high, and the hydrolysis reaction is performed in the anoxic tank 4, which not only can further denitrify the sewage.

The biological filler 501 is arranged in the aerobic tank 5, the aerator 502 is arranged at the bottom of the aerobic tank 5, the aerator 502 in the aerobic tank 5 is an existing commodity, and the selected aerator 502 not only ensures oxygen supply, but also ensures that a biological film on the biological filler 501 can fall off.

The upper part of the anoxic tank 4 is communicated with a conveying pipeline of a water pump 8, the nitrified liquid on the upper layer of the sedimentation tank 9 flows back to the anoxic tank 4 through the water pump 8, the nitrate nitrogen content in the anoxic tank 4 is supplemented, and therefore the denitrification reaction can be carried out in the anoxic tank 4.

Further, the anoxic tank 4 and the aerobic tank 5 are integrally provided, a partition wall 503 is provided between the anoxic tank 4 and the aerobic tank 5, and the partition wall 503 is provided with a circulation port 504. Guarantee the circulation relation of oxygen deficiency pond 4 and good oxygen pond 5 through flowing through opening 504, wherein, oxygen deficiency pond 4 and good oxygen pond 5 are integrative to be set up, can adopt the glass steel material to build to easily carry, secondly oxygen deficiency pond 4 and good oxygen pond 5 are cut apart through partition wall 503, thereby in the technology, dissolved oxygen concentration can form the form that increases progressively, and the dissolved oxygen concentration of oxygen deficiency pond 4 is generally 0.2 ~ 0.5mg/L promptly. The concentration of dissolved oxygen in the aerobic tank 5 is more than 2mg/L, and the aerobic tank 5 is used for degrading organic matters and removing phosphorus.

Based on the above embodiment, referring to fig. 3, another embodiment of the present invention is that a first feeding pipe 601 and a second feeding pipe 602 are placed on the sedimentation tank 6, for respectively feeding PAC and PAM through the first feeding pipe 601 and the second feeding pipe 602. PAC is a high-molecular coagulant prepared from the existing polyaluminium chloride, and has the effects of removing iron, fluorine, cadmium, radioactive pollution and floating oil after being put into a sedimentation tank 6. Wherein PAM is a high molecular water treatment flocculant made of polyacrylamide, so that the efficiency of adsorbing suspended particles in water in the sedimentation tank 6 is improved, fine particles form larger floccules, and the sedimentation speed is improved.

Wherein, the mud that produces in the sedimentation tank 6 mainly is oxidation pond 5 and drops ageing biomembrane, and this part of material if outflow along with going out water can be oxidated gradually to after dropping into current sewage treatment system, can improve whole processing system's accord, consequently, add PAM in sedimentation tank 6, utilize PAM to make the suspended biomembrane material adsorb on the solid matter, utilize the proportion of solid matter, make mud be difficult to deposit in the sedimentation tank bottom along with sewage outflow, and flow back to in the oxygen deficiency pond 3 through sludge pump 7.

Based on the above embodiment, the utility model discloses a another embodiment is, above-mentioned advanced treatment tank 9 includes division plate 901, and above-mentioned division plate 901 lower extreme leaves the circulation clearance with advanced treatment tank 9 bottom, increases the flow path of sewage at advanced treatment tank 9 through division plate 901.

The two ends of the partition plate 901 are respectively provided with a first filter screen 902 and a second filter screen 903, wherein the first filter screen 902 and the second filter screen 903 are both the existing activated carbon filter screens, and the external profiles of the first filter screen 902 and the second filter screen 903 are both matched with the cross section of the sewage channel of the advanced treatment tank 9.

The first filter screen 902 and the second filter screen 903 can be welded or locked by bolts, and the inlet and the outlet of the advanced treatment tank 9 are respectively arranged above the first filter screen 902 and the second filter screen 903 and used for primary filtration by the first filter screen 902 and secondary filtration by the second filter screen 903.

Wherein, the active carbon of first filter screen 902 and second filter screen 903 kind is a porous material, and easily automatic control, to water yield, quality of water, temperature change strong adaptability, utilizes the active carbon to get rid of the organic matter of molecular weight at 500 ~ 3000, because the material content is complicated in the poultry sewage, consequently filters the poultry sewage through the active carbon filter screen more than two, can get rid of smelly, colourity, heavy metal, disinfection accessory substance, chlorinated organic matter, pesticide, radioactive organic matter economically and effectively.

Based on the above-mentioned embodiment, refer to fig. 4 and show, another embodiment of the utility model is that, above-mentioned septic tank 2 includes one-level septic tank 201, second grade septic tank 202 and tertiary septic tank 203, and above-mentioned one-level septic tank 201 upper end sets up the entry, adopts the pipe chute intercommunication between above-mentioned one-level septic tank 201 and the second grade septic tank 202, adopts the pipe chute intercommunication between above-mentioned second grade septic tank 202 and the tertiary septic tank 203, and above-mentioned tertiary septic tank 203 upper portion sets up the export.

Wherein, poultry sewage in the cistern 1 gets into from one-level septic tank 201, because poultry sewage contains excrement and urine, can produce the fermentation in the one-level septic tank 201 promptly, because of the material proportion difference in the poultry sewage, the upper strata of one-level septic tank 201 is the excrement skin, the lower floor is the excrement sediment, the middle level is the clear liquid manure, it contains bacterium and parasitic ovum more in excrement skin and the excrement sediment, the middle level contains the ovum less, the middle level liquid manure of preliminary fermentation can overflow to second grade septic tank 202 through the pipe chute, its excrement skin and the excrement sediment that do not fully ferment are detained in one-level septic tank 201.

The liquid dung entering the second-stage septic tank 202 is still fermented and decomposed, worm eggs in the liquid dung can gradually sink, pathogen in the second-stage septic tank 202 can die gradually due to lack of excrement residues and excrement skin, the liquid dung is further harmless, and a small amount of excrement skin floats upwards in the second-stage septic tank 202 like the first-stage septic tank 201, the excrement residues sink, the liquid dung can overflow to the third-stage septic tank 203 through an inclined pipe, the liquid dung entering the third-stage septic tank 203 is treated and decomposed through the first-stage septic tank 201 and the second-stage septic tank 202, and the pathogen and parasitic ova are basically killed. The function of the three-stage septic tank 203 is mainly to store and transfer the anoxic tank 3.

Based on the above embodiment, the utility model discloses a another embodiment is, 1 exit end of above-mentioned cistern is equipped with the solenoid valve, and above-mentioned cistern 1 is equipped with level sensor, and above-mentioned level sensor and solenoid valve control unit signal connection for the liquid level signal who is gathered according to level sensor by the solenoid valve control unit releases the sewage in the cistern 1.

Wherein, cistern 1 is used for collecting poultry sewage to guarantee that whole pretreatment systems has sufficient sewage to flow when moving, avoid the sewage volume to reach the service standard and lead to whole system shut down.

Meanwhile, the water storage tank 1 is generally buried underground or stored in a tank body, so that the sewage amount can not be directly observed conveniently, the sewage height in the water storage tank 1 is collected through the liquid level sensor, the lowest equipment requirement of the sewage amount treated at the time is met, the outlet end of the water storage tank 1 is opened through the electromagnetic valve, and sewage flows into the septic tank 2 in batches and a subsequent functional tank.

Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," "a preferred embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (8)

1. A pretreatment system for livestock breeding sewage, comprising a reservoir (1), characterized in that: cistern (1) one side is equipped with septic tank (2), cistern (1) is linked together with septic tank (2), septic tank (2) communicate anaerobism pond (3), oxygen deficiency pond (4), good oxygen pond (5) and sedimentation tank (6) in proper order, sedimentation tank (6) one side is equipped with sludge pump (7) and water pump (8), sludge pump (7) head end intercommunication sedimentation tank (6) bottom, sludge pump (7) end intercommunication anaerobism pond (3), water pump (8) head end intercommunication sedimentation tank (6) upper portion, water pump (8) end intercommunication oxygen deficiency pond (4), sedimentation tank (6) end intercommunication deep processing pond (9) for discharge sewage secondary treatment in the conventional treatment facility by deep processing pond (9).

2. The pretreatment system for livestock breeding sewage of claim 1, wherein: anaerobism pond (3) upper end is equipped with gas collecting pipe (301), anaerobism pond (3) bottom is equipped with mud slope (302), mud slope (302) eminence is equipped with inlet tube (303), anaerobism pond (3) upper portion is equipped with outlet pipe (304), mud slope (302) bottom is equipped with row mud pipeline (305), the pipeline intercommunication of anaerobism pond (3) upper end and sludge pump (7) for by inlet tube (303) intercommunication septic tank (2), be used for by outlet pipe (304) intercommunication oxygen deficiency pond (4).

3. The pretreatment system for livestock breeding sewage of claim 1, wherein: the anaerobic tank is characterized in that a stirrer (401) is arranged in the anaerobic tank (4), the lower end of the anaerobic tank (4) is communicated with the lower end of the aerobic tank (5), biological fillers (501) are arranged in the aerobic tank (5), an aerator (502) is arranged at the bottom of the aerobic tank (5), and the upper part of the anaerobic tank (4) is communicated with a conveying pipeline of a water pump (8).

4. The pretreatment system for livestock breeding sewage of claim 3, wherein: the anaerobic tank (4) and the aerobic tank (5) are integrally arranged, a partition wall (503) is arranged between the anaerobic tank (4) and the aerobic tank (5), and the partition wall (503) is provided with a circulating port (504).

5. The pretreatment system for livestock breeding sewage of claim 1, wherein: and a first feeding pipe (601) and a second feeding pipe (602) are arranged on the sedimentation tank (6) and used for respectively feeding PAC and PAM from the first feeding pipe (601) and the second feeding pipe (602).

6. The pretreatment system for livestock breeding sewage of claim 1, wherein: the deep treatment pool (9) comprises a partition plate (901), a circulation gap is reserved between the lower end of the partition plate (901) and the bottom of the deep treatment pool (9), a first filter screen (902) and a second filter screen (903) are arranged at the two ends of the partition plate (901) respectively, an inlet and an outlet of the deep treatment pool (9) are arranged above the first filter screen (902) and the second filter screen (903) respectively, and are used for primary filtration by the first filter screen (902) and secondary filtration by the second filter screen (903).

7. The pretreatment system for livestock breeding sewage of claim 1, wherein: septic tank (2) include one-level septic tank (201), second grade septic tank (202) and tertiary septic tank (203), one-level septic tank (201) upper end sets up the entry, adopt the pipe chute intercommunication between one-level septic tank (201) and second grade septic tank (202), adopt the pipe chute intercommunication between second grade septic tank (202) and tertiary septic tank (203), tertiary septic tank (203) upper portion sets up the export.

8. The pretreatment system for livestock breeding sewage of claim 1, wherein: the sewage treatment device is characterized in that an electromagnetic valve is arranged at the outlet end of the water storage tank (1), a liquid level sensor is arranged on the water storage tank (1), and the liquid level sensor is in signal connection with the electromagnetic valve control unit and used for releasing sewage in the water storage tank (1) according to a liquid level signal collected by the liquid level sensor through the electromagnetic valve control unit.

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