CN113149357A

CN113149357A - Facility and method for biologically and ecologically treating and recycling pig breeding wastewater

Info

Publication number: CN113149357A
Application number: CN202110453439.XA
Authority: CN
Inventors: 薛治宝; 孙丕明; 熊波; 侯畅; 张春源
Original assignee: Hunan Ontario Environmental Protection Technology Co ltd
Current assignee: Hunan Ontario Environmental Protection Technology Co ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-07-23

Abstract

The invention discloses a facility and a method for biologically and ecologically treating and recycling pig breeding wastewater, which comprises a feces collection pool, a grid well, a sieve plate sieve dry-wet separator, a methane tank, an anaerobic-settling tank, a blow-off tank, an A2/O biochemical pool, a coagulating sedimentation pool, a sludge concentration pool, a biological filter bed, an ecological artificial wetland, an aquatic plant stabilization pool, an ecological ditch and an air supply fan, wherein the front end of the feces collection pool is provided with a sewage inlet pipe, and the rear end of the feces collection pool is provided with a sewage outlet pipe. The facility and the method for biologically and ecologically treating and recycling the live pig breeding wastewater adopt a method of biological and ecological combined treatment on the rural live pig breeding wastewater, have the characteristics of cost saving for transportation and introduction and high pollutant removal efficiency, can recycle the wastewater treated by the treatment facility for farmland irrigation or aquaculture water, realize resource utilization of the treated water, are simpler and more convenient in the aspects of daily technical work, management and maintenance, and better accord with the theme of energy conservation and environmental protection.

Description

Facility and method for biologically and ecologically treating and recycling pig breeding wastewater

Technical Field

The invention relates to the technical field of livestock and poultry manure treatment, in particular to a facility and a method for biologically and ecologically treating and recycling pig breeding wastewater.

Background

The fecaluria of pig breeding industry is not only in large quantity, and the pollutant variety that it contains is also very much, mainly includes: the excrement and urine and the malodorous components contained in the decomposition products of the excrement and urine, a large amount of organic matters such as hydrogen sulfide, ammonia, alcohols, amides, navy mine, indole and the like generated by the decomposition of the excrement and urine under the anaerobic condition, and a large amount of pathogenic bacteria, microorganisms and veterinary drug residual seedlings can pollute the environment through the atmosphere, water and soil, generate malodor, stimulate respiratory tracts of people and livestock, cause respiratory diseases and reduce the productivity of livestock and poultry, attract mosquitoes and flies, breed and transmit diseases, pollute drinking water soil and crops, and transmit diseases suffered by people and livestock and poultry and infectious diseases of the livestock and poultry.

The pig breeding industry mainly pollutes breeding wastewater, solid excrement and foul gas, and a large amount of ammonia, phosphorus, organic suspended matters, germs, parasites and the like exist in the pollutants, and the pig breeding industry is mainly characterized by high concentration of the pollutants, high content of the suspended matters and high content of ammonia nitrogen.

At present, two trends exist for the treatment of the pig breeding wastewater, one trend is to adopt extensive treatment processes such as a pig manure storage pool, a digestion pool or a simple methane tank, a sedimentation pool, an oxidation pond and the like, the other trend is to adopt high-level treatment processes such as electrocatalytic oxidation, ozone and the like, the breeding owners cannot bear the attention, and the problem to be solved is to develop a technical process which not only has good pollution treatment effect, but also needs simple and convenient technical work, management and maintenance, and can realize resource utilization.

Disclosure of Invention

The invention aims to provide a facility and a method for biologically and ecologically treating and recycling pig breeding wastewater, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a biological ecological improvement retrieval and utilization facility of live pig breeding waste water, includes dirty catch pit of excrement, grille well, sieve dry and wet separating centrifuge, methane-generating pit, the anaerobism pond of sinking, blows and takes off pond, A2/O biochemical pond, coagulating sedimentation tank, sludge thickening tank, biofilter bed, ecological constructed wetland, aquatic plant stabilization pond, ecological irrigation canals and ditches and air supply fan, the front end of the dirty catch pit of excrement is provided with into dirty tub, the rear end of the dirty catch pit of excrement is provided with out the dirty pipe, the inboard of the dirty catch pit of excrement is provided with vertical mixer, the grille well is installed to the one end of out the dirty pipe, the internally mounted of grille well has the grid, and the net interval between the adjacent grid is 25-30mm, and grid installation angle of elevation is 75 degrees, the internally mounted of grille well has the grille well elevator pump, sieve dry and wet separating centrifuge is installed to one side of grille well, one side of sieve dry and wet separating centrifuge has the pipeline installation, the inside fermentation room that is provided with of methane-generating pit, the anaerobism adjusting tank is installed to one side of methane-generating pit, one side of anaerobism adjusting tank is installed and is blown off the pond, one side of blowing off the pond is provided with the biochemical pond of A2O, one side of the biochemical pond of A2O is provided with the coagulating sedimentation pond, one side of coagulating sedimentation pond sets up the sludge thickening pond, one side of sludge thickening pond is provided with biological filter bed, one side of biological filter bed is provided with ecological constructed wetland, one side of ecological constructed wetland is provided with aquatic plants stabilization pond, aquatic plants stabilization pond one side is provided with ecological irrigation canals and ditches, ecological irrigation canals and ditches have laid ecological cement perforated brick on the native soil layer, be equipped with herbaceous plant in the ecological cement perforated brick, herbaceous plant all natural growth, ecological position irrigation canals and ditches bottom planting has the plant of push water, push water plants cane shoot, ecological irrigation canals and ditches head end is provided with ecological irrigation canals and ditches inlet tube, ecological irrigation canals and ditches tail end is provided with ecological irrigation canals and ditches outlet pipe, one side of ecological irrigation canals and ditches is provided with the air feed fan.

Preferably, the ecological artificial wetland comprises a water distribution tank, a wetland section and a water collection tank, wherein a water distribution tank water inlet pipe is arranged at the upper part of the tank wall at the front end of the water distribution tank, the water distribution tank water inlet pipe is arranged at the upper part of the tank wall at the front end of the water distribution tank and below 100mm of designed water level, a water distribution tank water outlet pipe is arranged at the tank wall at the rear end of the water distribution tank, a wetland section is arranged at the rear side of the common wall of the tank wall at the rear end of the water distribution tank, a water collection layer is arranged at the bottom of the wetland section, the water collection layer is made of gravels with the radius of 16-32mm and the original degree of 300mm, a water collection pipe is arranged in the middle of the water collection layer and consists of a first main pipe and a first branch pipe, the first main pipe and the first branch pipe are arranged in a non-character shape, a plurality of first holes with the diameter of 10mm are arranged on the first branch pipe, the hole spacing between the adjacent first holes is 200mm, the wetland section is arranged on the water collection layer, and the wetland section is made of zeolite, the radius is 32-64mm, the original degree is 600mm, a water distribution layer is arranged on the block material of the wet area, the water distribution layer blocks are cobblestones, the radius is 16-32mm, the original degree is 300mm, the middle of the water distribution layer is provided with a water distribution pipe, the water distribution pipe consists of a second main pipe and a second branch pipe, the second main pipe and the second branch pipe are arranged in a non-character shape, a plurality of second holes with the diameter of 8mm are arranged on the two sides of the lower edge of the second branch pipe in a 45-degree oblique staggered manner, the hole distance between every two adjacent second holes is 250mm, a soil layer is arranged on the water distribution layer, the original degree of the soil layer is 300mm, wetland plants are planted on the soil layer, the wetland plant is cress, the rear side of the pool wall at the rear end of the wetland section is provided with a water collecting tank, the water collecting tank is characterized in that a water collecting tank water outlet pipe is arranged on the upper portion of the tank wall at the rear end of the water collecting tank, and the water collecting tank water outlet pipe is arranged on the upper portion of the tank wall at the rear end of the water collecting tank and is below 200mm of the designed water level.

Preferably, a stabilization pond water inlet pipe is arranged at the front end of the aquatic plant stabilization pond, a submerged plant zone is arranged at the bottom of the aquatic plant stabilization pond, the submerged plant zone is golden fish algae, a floating plant zone is planted on the bottom slope of the aquatic plant stabilization pond, the floating plant is water lily, a water push plant zone is planted on the edge of the aquatic plant stabilization pond, the water push plant is mushroom, and a stabilization pond water outlet pipe is arranged at the rear end of the aquatic plant stabilization pond.

Preferably, the sieve plate sieve dry-wet separator comprises a material homogenizing box, a stainless steel sieve, a sieve plate box and a rack, a solid slag discharging pipe is arranged on the lower side of the sieve plate box, a feeding hole and an air guide pipe are arranged at the top of the methane tank, a discharging pipe is arranged on the wall of the tail end of the fermentation room, one end of the discharging pipe is provided with a discharging room, and a methane liquid outlet pipe is arranged at the tail end of the discharging room.

Preferably, the anaerobism sink adjustment tank includes anaerobism sink section and regulation section, and the anaerobism sink section lower part and be the awl fill type, anaerobism sink section front end cell wall and be provided with anaerobism sink adjustment tank inlet tube, anaerobism sink section back wall is provided with the guide plate, just anaerobism sink section back wall third department is located to the guide plate, anaerobism sink section back end cell wall upper portion is provided with basin and back wall discharge orifice, and basin and back wall discharge orifice all locate below 100 meters of anaerobism sink section back end cell wall upper portion design water level, anaerobism sink section bottom is provided with anaerobism sink adjustment tank mud pipe, regulation section back end cell wall is provided with anaerobism sink adjustment tank outlet pipe, one side of anaerobism sink adjustment tank outlet pipe is provided with the coagulating sedimentation pond.

Preferably, the front end pool wall design water level department that blows off the pond is provided with blows off the pond inlet tube, the bottom that blows off the pond is provided with blows off the air hose, it keeps away from the one end that blows off the pond and links to each other with the air feed fan to blow off the air hose, it is responsible for and the third branch pipe constitutes by the third to blow off the air hose, the third is responsible for and is non-style of calligraphy with the third branch pipe and arranges, branch pipe both sides pipe wall outwards separates 45 degrees and sets up the third punchhole of several 3-5mm, and the interval between the adjacent third punchhole is 100mm, it is provided with and blows off the pond outlet pipe to blow off pond rear end pool wall upper portion, it locates to blow off 100mm below the pond wall upper portion design water level of blow off pond rear end.

Preferably, the A2/O biochemical pool comprises an anaerobic section, an anoxic section and an aerobic section, the upper part of the pool wall at the front end of the anaerobic section is provided with an anaerobic section water inlet pipe, the anaerobic section water inlet pipe is arranged at the position below the design water level 100mm at the upper part of the pool wall at the front end of the anaerobic section, the inner part of the A2/O biochemical pool is provided with soft lump materials, the length of fiber strips of the soft lump materials is 120mm, the interval of the fiber strips is 120mm, the fiber quantity is 8100, the theoretical specific surface area is 1235 square meters per cubic meter, the bottom of the A2/O biochemical pool is provided with a sludge return pipe, the pool wall at the rear end of the anaerobic section is provided with a flow passing hole A, the flow hole A is arranged at the position below the design water level 150mm at the pool wall at the rear end of the anaerobic section, the anoxic section is arranged at the rear side of the common wall at the rear end of the anaerobic section, a combined lump material is arranged in the anoxic section, and the diameter of the combined plastic ring piece is 75mm, the diameter of the single lump materials is 150mm, the distance between the single lump materials is 60mm, the arrangement distance of the combined lump materials is 150mm, the theoretical specific area is 2600 square meters per cubic meter, the bottom of the A2/O biochemical pool is provided with an underwater impeller, the bottom of the wall of the A2/O biochemical pool is provided with a nitrifying liquid return pipe, the rear wall of the anoxic section is provided with an overflowing hole B, the overflowing hole B is arranged below the designed water level of the rear wall of the anoxic section which is 150mm below, the rear side of the common wall of the rear wall of the anoxic section is provided with an aerobic section, a poly-amino acid lump material is arranged in the aerobic section, the poly-amino acid lump material is filled in a compartment formed by an upper steel wire mesh and a lower steel wire mesh, the filling rate is 50%, the poly-amino acid lump material is modified by a nano material, the pore space is 90-95%, the specification of the carrier is 40mm cubic, the bottom of the aerobic section is provided with an aeration pipe assembly, and the aeration pipe assembly is connected with an air supply fan, the aerator in the aeration pipe assembly is an OHR aerator, the single-chip gas delivery amount is 1 cubic meter per minute, the service area is 2-3 square meters, the bottom of the tank wall at the rear end of the aerobic section is provided with a nitrifying liquid reflux pump, the upper part of the tank wall at the rear end of the aerobic section is provided with an outlet pipe of the aerobic section, and the outlet pipe of the aerobic section is arranged at the position below the design water level of the upper part of the tank wall at the rear end of the aerobic section, which is 200 mm.

Preferably, the coagulating sedimentation tank comprises a coagulating section, a sedimentation section and a middle water tank, wherein the coagulating sedimentation section water inlet pipe is arranged on the upper part of the pond wall at the front end of the coagulating section, the coagulating sedimentation section water inlet pipe is arranged at the position below 200mm below the designed water level on the upper part of the pond wall at the front end of the coagulating section, a coagulating mixer is arranged in the coagulating sedimentation tank, the coagulating section overflowing hole is arranged at the middle lower part of the pond wall at the rear end of the coagulating sedimentation tank, the sedimentation section is arranged at the rear side of the same wall of the pond wall at the rear end of the coagulating section, an inclined pipe assembly is arranged in the coagulating sedimentation tank and consists of a bracket and an inclined pipe column, round steel with the diameter of 10mm is welded on unequal-sided steel with the diameter of 5 multiplied by 6mm, the inclined pipe is 80mm in pipe diameter and 1000mm in inclined length, the vertical height is 867mm, the inclination angle is 60 degrees, a bottom sludge passing hole is arranged at the bottom of the coagulating sedimentation tank, and a sludge reflux pump is arranged at the bottom of the coagulating sedimentation tank, the coagulating sedimentation tank rear end pond wall is provided with the precipitation section apopore, and the precipitation section apopore is located coagulating sedimentation tank rear end pond wall design water level below 250mm, precipitation section rear end pond wall is provided with middle basin altogether behind the wall, middle basin bottom is provided with middle basin elevator pump, and the basin rear end pond wall in the middle of institute is provided with middle basin outlet pipe, and middle basin outlet pipe is located middle basin rear end pond wall design water level below 250 mm.

Preferably, the bottom of the sludge concentration tank is provided with a sludge concentration sludge discharge pipe, the tank wall at the rear end of the sludge concentration tank is provided with a supernatant discharge pipe, and the supernatant discharge pipe is arranged at a position below the design water level 300mm of the tank wall at the rear end of the sludge concentration tank.

Preferably, a biological filter bed water inlet pipe and a filter plate and filter head assembly are arranged at the upper part of the tank wall at the front end of the biological filter bed and the designed water level, the space between the bottom of the biological filter bed and the filter head component of the filter plate is a water collecting room, the height of the water collecting room is 400mm, the filter head component of the filter plate consists of the filter plate and the filter head, the thickness of the filter plate is 8mm, the specification and the size of the filter plate are 490 multiplied by 490mm, a round hole with the diameter of 33mm is drilled on the steel plate, the distance between the holes is 100mm, the short handle filter head is arranged in the circular hole, the specification size is 355 multiplied by 60mm, the magnetic therapy is ABS, the original degree is 100mm, a cushion layer is arranged in the biological filter bed, the cushion layer is made of quartz sand, the particle size is 2-4 mm, the thickness is 100mm, the biological filter material is arranged on the cushion layer, the biological filter material is a straw section, the length is 50mm, the original degree is 900mm, and a water outlet pipe of the biological filter bed is arranged on the tank wall at the rear end of the water collecting room.

Preferably, the implementation method of the facility for biologically and ecologically treating and recycling the pig breeding wastewater comprises the following specific steps:

s1, allowing the excrement in the field to enter an excrement collecting tank (1) through an excrement inlet pipeline (101), starting a vertical stirrer (103), and uniformly stirring the excrement in the tank;

s2, the uniformly mixed manure enters a grid well (2) through a manure outlet pipe (102) of a manure collecting pool (1), suspended matters are separated and removed through a grid in the grid well, and then the separated and filtered manure is conveyed to a sieve plate and sieve dry type separator (3) through a lifting pump (202) in the grid well (2);

s3, the manure slag separated by the sieve plate dry-wet separator (3) enters a solid composting process from a solid slag discharging pipe (301), the separated sewage enters a fermentation chamber (401) of the methane tank (4) from a feeding hole (402) of the methane tank (4), the fermented and decomposed sewage enters a discharging chamber (404) from a discharging pipe (403), and then enters an anaerobic settling tank (5) from a methane tank liquid outlet pipe (405) and an anaerobic settling tank water inlet pipe (501) connected with the methane tank, the methane generated by the methane tank (4) is led out by a gas guide pipe (406) to enter a methane pipeline to be connected with a farmer kitchen for supplying cooking energy, so that non-renewable energy sources of minerals such as electric coal, liquefied gas and the like can be saved, the energy consumption is saved, and the purpose of emission reduction is achieved;

s4, sewage carries out anaerobic sedimentation separation on suspended matters in an anaerobic sedimentation section of an anaerobic sedimentation regulating tank (5), the separated sedimentation sludge is discharged into a solid composting process through a sludge discharge pipe (505) of the anaerobic sedimentation regulating tank, the separated sewage enters a regulating section through a water storage tank (503) and a rear wall overflowing hole (504) after being rectified by a guide plate (502), the water quality and the water quantity are equalized, the water discharged from the anaerobic sedimentation regulating tank enters an air stripping tank (6) through a water outlet pipe (506) of the anaerobic sedimentation regulating tank and a water inlet pipe (601) of the air stripping tank connected with the water outlet pipe, the stagnation time of the anaerobic sedimentation section is 4 hours, and the stagnation time of the regulating section is 24 hours;

s5, blowing off ammonia nitrogen in sewage in a blowing-off tank (6) through a blowing-off air pipe (602) arranged at the bottom of the tank, adding alkali to adjust the pH value to be 0 when blowing off, then blowing off large air bubbles, wherein air required by blowing-off is provided by the blowing-off air pipe (602) and an air supply fan (14) connected with the blowing-off air pipe, effluent after ammonia nitrogen blowing-off treatment enters an anaerobic section (701) through a blowing-off water outlet pipe (603) and an anaerobic section water inlet pipe (711) of an A2/O biochemical tank (7) connected with the blowing-off air pipe, and the blowing-off time of the blowing-off tank (6) is 5 hours;

s6, after sewage enters an anaerobic section (701) of an A2/0 biochemical pool (7), most CODcr is removed under the action of anaerobic bacteria, in addition, the sludge in the coagulation sedimentation pool (8) is pumped and conveyed to the phosphorus accumulating bacteria in the returned sludge of the anaerobic section (701) by a sludge reflux pump (824) to be suppressed to release phosphate in vivo, energy is generated to absorb and degrade organic matters, the organic matters are lightened into PHB in cells to be stored, the anaerobic release of phosphorus is completed in the process, soft lump materials (712) are arranged in the anaerobic section (701) to form an anaerobic biofilm, the number of microorganisms is increased, the degradation of the organic matters is facilitated, the effluent water biologically treated by the anaerobic section (701) enters the anaerobic section (702) from an overflowing hole (714) to degrade the organic matters and nitrify and denitrify, an underwater propeller (722) is started, providing necessary dissolved oxygen for denitrification reaction, wherein in the range of 0.5-1.5mg/L, under the anoxic condition, denitrifying bacteria utilize organic carbon in sewage as an electron donor and nitrate as an electron acceptor to perform anaerobic respiration, reducing nitrate nitrogen in nitrifying liquid which flows back to an anoxic section (702) through a nitrifying liquid reflux pump (733) and a nitrifying liquid reflux pipe (723) arranged in an aerobic section (703) into nitrogen to be released, so as to complete the denitrification process, a combined block material (721) is arranged in the anoxic section (702), the combined block material (721) is used for providing a stable growth environment for anoxic microorganisms so as to increase the concentration and activity of the anoxic microorganisms, increase the removal and deoxidation capacity of the anoxic section (702) on organic matters, and effluent water treated by anoxic organisms in the anoxic section enters the aerobic section (703) through a overflowing hole (724), the aeration pipe component (732) is started to provide dissolved oxygen DO necessary for aerobic biological reaction by oxidizing organic matters and nitrifying ammonia nitrogen, in the range of 2-4mg/L, the active sludge and microorganisms on the poly-ammonia acid block material (731) use one part of the organic matters in the sewage to synthesize new cells under aerobic condition, and decompose and metabolize the other part of the organic matters to obtain energy required by cell synthesis, and the final product is CO₂And H₂O, etc., and organic nitrogen in the sewage is oxidized while the organic matter is oxidizedForming ammonia nitrogen, further converting the ammonia nitrogen into nitrite and nitrate, wherein the ammonia nitrogen conversion condition is that dissolved oxygen DO is sufficient, and the sludge is old, in addition, under the aerobic condition, the polyacidic bacteria aerobically decomposes PHB in vivo, the released energy is used for cell synthesis, breeds and absorbs phosphorus in the sewage to synthesize polyphosphate, and is discharged after the residual sludge is precipitated and concentrated, so as to realize the dephosphorization of the sewage, the aerobic section (703) is provided with a polyacidic acid block (731), the polyacidic acid block (731) is a nitrifying bacteria which is sensitive to the fixation and proliferation conditions, slow in proliferation speed, long in generation period and weak in competitiveness, so as to provide a good environment for improving the nitrification reaction effect, the air supply required by the aerobic reaction is provided by an aeration component (732) and an air supply fan (14) connected with the aeration component, the A2/O biochemical pool (7) utilizes three different environments of anaerobic degradation and aerobic reaction to organically cooperate with different microbial floras different types, can have the functions of removing organic matters and removing phosphorus and nitrogen at the same time, and the design and control parameters of the A2/O biochemical pool 7 are as follows: the hydraulic retention time of the anaerobic section is 2 hours, the anoxic section is 8 hours, the aerobic section is 36 hours, the sludge reflux ratio is 50-100 percent, the nitrifying liquid reflux ratio is 400 percent, the sludge concentration is 500mg/L, and the solubility anaerobic section DO is<0.2mg/L, 1-1.5mg/L of anoxic DO, 2-4mg/L of aerobic DO;

s7, the effluent of the A2/O biochemical pool (7) enters a coagulation section (801) from an aerobic section water outlet pipe (734) and a coagulation section water inlet pipe (811) of a coagulation sedimentation pool (8), a coagulation mixer (812) is started and a biological flocculant is added, the adding amount is 10mg/g to strengthen biological flocculation, the effluent after coagulation reaction enters a sedimentation section (802) from a coagulation section overflow hole (813), mud and water are separated through an inclined pipe assembly (821), the separated sludge enters a sludge concentration pool (9) from a bottom overflow hole (822) to be concentrated and then enters a solid composting process, the separated supernatant enters an intermediate water tank (803) from a sedimentation section water outlet hole, and then enters a biological filter bed (10) from an intermediate water tank lifting pump (831), an intermediate water tank water outlet pipe (832) and a biological filter bed water inlet pipe (1001) connected with the intermediate water tank enter the biological filter bed (10), the reaction time of the coagulation section is 30 minutes, the retention time of the precipitation section is 2 hours;

s8, water entering the biological filter bed (10) enters a bottom water collecting chamber (1002) after downward flow filtration through a biological filter material (1005), a cushion layer (1004) and a filter plate and filter head assembly (1003), the straw fragment section contains a large amount of crude fibers, lignin, mineral substances and the like, has good toughness and porosity and large specific tension area, organic matters in the sewage are degraded and nitrogen and phosphorus are absorbed through the straw fragment section block and the attached microbial action thereof, effluent of the biological filter bed (10) enters the ecological artificial wetland (11) through a biological filter bed water outlet pipe (1006) and a water distribution tank water inlet pipe (1111) connected with the biological filter bed (10), and the filtering speed of the biological filter bed (10) is 4 m/h;

s9, water entering a water distribution tank (1101) of an ecological artificial wetland (11) is provided with a water distribution tank outlet pipe (1112) and a water distribution pipe (1125) in a water distribution layer (1124) of a wetland section (1102) connected with the water distribution tank, the water enters a water collection tank (1103) after downward flow filtration and adsorption through a block material (1123) of the wetland section and a water collection pipe (1122) in a water collection layer (1121), a soil layer (1126) is arranged on the water distribution layer (1124), wetland plants (1127) are planted in the soil layer, the wetland plants are cresses, the ecological artificial wetland (11) utilizes the combined action of the block material (1123) of the substrate section and plant microorganisms to carry out filtration, deposition, substrate adsorption, complex precipitation and degradation and transformation on pollutants, so that organic matters, nitrogen and phosphorus are purified and removed, the effluent of the ecological artificial wetland (11) enters a plant stabilization pond (12) from a water collection tank outlet pipe (1131) and a stabilization water inlet pipe (1201) connected with the ecological artificial wetland section, the retention time of the ecological artificial wetland (12) is 48 h;

s10, enabling effluent entering the aquatic plant stabilization pond (12) to pass through a precipitation plant belt (1202) and a sewage plant belt (1203) arranged in the pond, pushing roots and stems of the water plant belt (1204) to enable organic matters, nitrogen and phosphorus in the water to be co-precipitated into a whole body to absorb and purify water quality, wherein the water purification is realized by utilizing a biomembrane generated around roots and stems of the aquatic plants and multiple functions of organic matter precipitation, filtration, adsorption, decomposition, nitrogen and phosphorus adsorption, nitrification, denitrification and the like generated at a sludge boundary to deeply purify the water quality and stabilize the water quality, and the effluent of the aquatic plant stabilization pond 12 enters an ecological ditch 13 through a stabilization pond water outlet pipe 1205 and an ecological ditch water inlet pipe 1305 connected with the stabilization pond;

s11, after the effluent enters the ecological ditch (13), due to the biological chain effect of herbaceous plants (1303) planted in the ecological cement perforated bricks (1302) on the two side slopes and water pushing plants (1304) at the bottom of the ecological ditch, pollutants in the water are further adsorbed and decomposed, the growth of microorganisms is promoted, the effect of safe water delivery is achieved, and the effluent of the ecological ditch (13) is output through an ecological ditch water outlet pipe (1306) and is reused for farmland irrigation or aquaculture water.

Compared with the prior art, the invention has the beneficial effects that:

the facility and the method for biologically and ecologically treating and recycling the live pig breeding wastewater adopt a method of biological and ecological combined treatment for the rural live pig breeding wastewater, have the characteristics of cost saving for transportation and introduction and high pollutant removal efficiency, can recycle the wastewater treated by the treatment facility for farmland irrigation or aquaculture water, realize resource utilization of the treated water, and simultaneously carry out daily technical work, management and maintenance more simply and conveniently, thereby more conforming to the subjects of energy conservation and environmental protection.

Drawings

FIG. 1 is a diagram of the association between units according to the present invention;

FIG. 2 is a front view of a portion of the biogas digester of the present invention;

FIG. 3 is a front view of a portion of the anaerobic digester of the present invention;

FIG. 4 is a front view of a portion of a blow-off tank of the present invention;

FIG. 5 is a front view of the A2/O biochemical pool of the present invention;

FIG. 6 is a front view of the coagulating sedimentation tank of the present invention;

FIG. 7 is a front view of a portion of a biofilter bed according to the present invention;

FIG. 8 is a partial front view of the ecological constructed wetland of the present invention;

FIG. 9 is a front view of a portion of the stabilization pond for aquatic plants of the present invention;

FIG. 10 is a front view of a portion of the ecological ditch of the present invention.

In the figure: 1. a manure collecting tank; 101. a sewage inlet pipe; 102. a sewage outlet pipe; 103. a vertical mixer; 2. a grid well; 201. a grid; 202. a lift pump in the grid well; 3. a sieve plate sieve dry type separator; 301. a solid slag tapping pipe; 4. a biogas generating pit; 401. a fermentation room; 402. a feed inlet; 403. a discharge pipe; 404. a discharging chamber; 405. a liquid storage pipe of the methane tank; 406. an air duct; 5. a anaerobic and sinking adjusting tank; 501. a water inlet pipe of the anaerobic adjusting tank; 502. a baffle; 503. a water outlet groove; 504. a rear wall overflow aperture; 505. a sludge discharge pipe of the anaerobic and sinking adjusting tank; 506. a water outlet pipe of the anaerobic-sedimentation regulating tank; 6. a stripping tank; 601. a water inlet pipe of the stripping tank; 602. an air pipe of the stripping tank; 603. a water outlet pipe of the stripping tank; 7. A2/O biochemical pool; 701. an anaerobic section; 711. a water inlet pipe of the anaerobic section; 712. soft lump material; 713. a sludge return pipe; 714. a overflowing hole A; 702. an anoxic section; 721. combining block materials; 722. an underwater impeller; 723. a nitrifying liquid return pipe; 724. an overflowing hole B; 703. an aerobic section; 731. a block of polyammonium acid; 732. an aeration tube assembly; 733. a nitrifying liquid reflux pump; 734. an aerobic section water outlet pipe; 8. a coagulating sedimentation tank; 801. a coagulation section; 811. a water inlet pipe of the coagulation section; 812. a coagulation mixer; 813. a flow passing hole of the coagulation section; 802. a precipitation section; 821. a chute assembly; 822. a bottom filtering hole; 823. water outlet holes of the settling section; 824. a sludge reflux pump; 803. an intermediate water tank; 831. a middle water tank lift pump; 832. an intermediate water tank; 9. a sludge concentration tank; 10. a biological filter bed; 1001. a water inlet pipe of the biological filter bed; 1002. a water collecting room; 1003. a filter plate and filter head assembly; 1004. a cushion layer; 1005. biological filter materials; 1006. a water outlet pipe of the biological filter bed; 11. ecological artificial wetland; 1101. a water distribution tank; 1111; a water inlet pipe of the water distribution tank; 1112. a water outlet pipe of the water distribution tank; 1102. a wet area; 1121. a water collection layer; 1122. a water collection pipe; 1123. wetland section block materials 1124 and a water distribution layer; 1125. a water distribution pipe; 1126. a soil layer; 1127. a hygrophyte; 1103. a water collection tank; 1131. a water outlet pipe of the water collecting tank; 12. an aquatic plant stabilization pond; 1201. stabilizing the pond water inlet pipe; 1202. a submerged plant zone; 1203. a floating plant zone; 1204. pushing the water plant belt; 1205. a water outlet pipe of the stabilization pond; 13. an ecological ditch; 1301. a primary soil layer; 1302. ecological cement porous bricks; 1303. a herbaceous plant; 1304. pushing the water plants at the bottom; 1305. an ecological ditch water inlet pipe; 1306. an ecological ditch water outlet pipe; 14. and a gas supply fan.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-10, the present invention provides a technical solution: a facility for biologically and ecologically treating and recycling pig breeding wastewater comprises a feces collection pool 1, a grid well 2, a sieve plate sieve dry-wet separator 3, a methane tank 4, an anaerobic sedimentation regulation pool 5, a blow-off pool 6, an A2/O biochemical pool 7, a coagulation sedimentation pool 8, a sludge concentration pool 9, a biological filter bed 10, an ecological artificial wetland 11, an aquatic plant stabilization pool 12, an ecological ditch 13 and an air supply fan 14, wherein a feces inlet pipe 101 is arranged at the front end of the feces collection pool 1, a feces outlet pipe 102 is arranged at the rear end of the feces collection pool 1, a vertical stirrer 103 is arranged at the inner side of the feces collection pool 1, a grid well 2 is fixedly arranged at one end of the feces outlet pipe 102, a grid 201 is fixedly arranged in the grid well 2, a grid well inner lifting pump 202 is fixedly arranged in the grid well 2, a sieve dry-wet separator 3 is fixedly arranged at one side of the grid well 2, and uniform feces enter the grid well 2 from the feces collection pipe 102 of the feces collection pool 1, coarse suspended matters are separated and removed through a grid in the grid well, then the separated and filtered excrement is conveyed into a sieve plate sieve dry type separator 3 through a lifting pump 202 in a grid well 2, the excrement slag separated by the sieve plate sieve dry type separator 3 is subjected to a solid composting process through a solid slag tapping pipe 301, one side of the sieve plate sieve dry type separator 3 is fixedly provided with a methane tank 4 through a pipeline, a fermentation room 401 is arranged in the methane tank 4, the separated sewage enters the fermentation room 401 of the methane tank 4 through a feeding port 402 of the methane tank 4, the fermented and decomposed sewage enters a discharging room 404 through a discharging pipe 403, and then enters an anaerobic settling regulating tank 5 through a methane tank liquid outlet pipe 405 and an anaerobic settling regulating tank water inlet pipe 501 connected with the methane tank 4, the methane generated by the methane tank 4 is led out through a gas guide pipe 406 and enters a methane pipeline to be connected with a farmer kitchen for supplying cooking energy, mineral non-renewable energy sources such as electric coal and the like can be saved, the energy consumption is saved and the emission reduction is achieved, sewage carries out anaerobic sedimentation separation on high-content suspended matters in an anaerobic sedimentation section, the separated sedimentation sludge is discharged into a solid composting process through a sludge discharge pipe 505 of an anaerobic sedimentation regulating tank, one side of a methane tank 4 is fixedly provided with the anaerobic sedimentation regulating tank 5, the separated sewage enters the regulating section through a water storage tank 503 and a rear wall overflowing hole 504 after being rectified by a guide plate 502, the water quality and the water quantity are equalized, one side of the anaerobic sedimentation regulating tank 5 is fixedly provided with an air stripping tank 6, one side of the air stripping tank 6 is provided with an A2/O biochemical tank 7, one side of the A2/O biochemical tank 7 is provided with a coagulating sedimentation tank 8, one side of the coagulating sedimentation tank 8 is provided with a sewage wetland concentrating tank 9, one side of the sewage wetland concentrating tank 9 is provided with a biological filter bed 10, one side of the biological filter bed 10 is provided with an ecological artificial pond 11, one side of the ecological artificial wetland concentrating tank 11 is provided with an aquatic plant stabilizing tank 12, an ecological ditch 13 is arranged at one side of the aquatic plant stabilization pond 12, an ecological ditch 13 is paved with an ecological cement perforated brick 1302 on an original soil layer 1301, herbaceous plants 1303 are arranged at the natural growth positions in the ecological cement perforated brick 1302, a water pushing plant 1304 is planted at the bottom of the ecological ditch 13, water bamboo is used as the water pushing plant 1304, an ecological ditch inlet pipe 1305 is arranged at the head end of the ecological ditch 13, an ecological ditch outlet pipe 1306 is arranged at the tail end of the ecological ditch 13, an air supply fan 14 is arranged at one side of the ecological ditch 13, after water enters the ecological ditch 13, due to the biological chain effect of the herbaceous plants 1303 planted in the ecological cement perforated brick 1302 at two side slopes and the water pushing plant 1304 at the bottom of the ditch, pollutants in water are further adsorbed and decomposed, the growth of microorganisms is promoted, the effect of safe water delivery is achieved, the water output of the ecological ditch 13 is output by the ecological ditch outlet pipe 1306 and is recycled for farmland irrigation or aquaculture water, if the water is reused for aquaculture, the water is disinfected first.

The working principle is as follows: the method comprises the steps that excrement in a field area enters an excrement collecting pool 1 through an excrement inlet pipeline 101, a vertical stirrer 103 is started to stir the excrement in the pool uniformly, the uniformly mixed excrement enters a grid well 2 through an excrement outlet pipe 102 of the excrement collecting pool 1, coarse suspended matters are separated through a grid in the grid well, a lifting pump 202 in the grid well 2 conveys the separated and filtered excrement to a sieve plate sieve dry-type separator 3, excrement residues separated by the sieve plate sieve dry-wet separator 3 enter a solid composting process through a solid residue slag outlet pipe 301, the separated sewage enters a fermentation room 401 of a methane tank 4 through a feed inlet 402 of the methane tank 4, and the fermented and thoroughly decomposed sewage enters a discharge room through a discharge pipe404, the sewage enters an anaerobic adjusting tank 5 through a methane tank outlet pipe 405 and an anaerobic adjusting tank inlet pipe 501 connected with the methane tank, the methane generated by the methane tank 4 is led out through a gas guide pipe 406 and enters a methane pipeline to be connected with a farmhouse kitchen for supplying cooking energy, mineral non-renewable energy such as electricity, coal, liquefied gas and the like can be saved, energy consumption is saved, and the purpose of emission reduction is achieved, the sewage carries out anaerobic sedimentation separation on high-content suspended matters in an anaerobic section, the separated sedimentation sludge is discharged into a solid composting process through a sludge discharge pipe 505 of the anaerobic adjusting tank, the separated sewage enters an adjusting section through a water storage tank 503 and a rear wall overflowing hole 504 after being rectified by a guide plate 502, the water quality and the water quantity are equalized, the effluent of the anaerobic adjusting tank enters a stripping tank 6 through an anaerobic adjusting tank outlet pipe 506 and a stripping tank inlet pipe 601 connected with the anaerobic adjusting tank, the stagnation time of the anaerobic section is 4 hours, and the stagnation time of the adjusting section is 24 hours, the sewage is blown off ammonia nitrogen in the sewage in a blow-off tank 6 by a blow-off air pipe 602 arranged at the bottom of the tank, alkali is added to adjust the pH value to be 0 when the sewage is blown off, then large air bubble blow-off is carried out, air required by the blow-off air pipe 602 during the blow-off is provided by an air supply fan 14 connected with the blow-off air pipe 602, effluent after the ammonia nitrogen is blown off is fed into an anaerobic section 701 by a blow-off water outlet pipe 603 and an anaerobic section water inlet pipe 711 of an A2/O biochemical tank 7 connected with the blow-off air pipe, the blow-off time of the blow-off tank 6 is 5 hours, the sewage is fed into the anaerobic section 701 of the A2/0 biochemical tank 7, most CODcr (organic matter content) is removed under the action of anaerobic bacteria, in addition, the sludge in the coagulation sedimentation tank 8 is pumped and conveyed to the phosphorus accumulating bacteria in the returned sludge of the anaerobic section 701 by a sludge reflux pump 824, the phosphorus accumulating bacteria are suppressed to release phosphate in the sewage, and the phosphate in the sewage is generated to absorb and rapidly degrade the organic matters, the organic matter is lightened into PHB in the cell body and stored, the anaerobic release of phosphorus is completed in the process, a soft block material 712 arranged in the anaerobic section 701 is used for forming an anaerobic biological membrane, the number of microorganisms is increased, the degradation of the organic matter is facilitated, the effluent water biologically treated by the anaerobic section 701 enters the anoxic section 702 from an overflowing hole armor 714 to degrade the organic matter and carry out nitrification and denitrification, an underwater impeller 722 is opened to provide necessary dissolved oxygen for denitrification reaction, and the dissolved oxygen is in the range of 0.5-1.5mg/L under the anoxic condition that denitrifying bacteria utilize sewage water to store the PHBOrganic carbon in the aerobic section 703 is used as an electron donor, nitrate is used as an electron acceptor for anaerobic respiration, nitrate nitrogen in the nitrifying liquid which flows back to the anoxic section 702 through a nitrifying liquid reflux pump 733 and a nitrifying liquid reflux pipe 723 which are arranged in the aerobic section 703 is reduced into nitrogen to be released, a denitrification process is completed, a combined block 721 arranged in the anoxic section 702 is used for providing a stable growth environment for anoxic microorganisms so as to increase the concentration and activity of the anoxic microorganisms and increase the removal and deoxidation capacity of the anoxic section 702 on organic matters, effluent water treated by the anoxic organisms in the anoxic section enters the aerobic section 703 through an overflow hole B724 to oxidize the organic matters and nitrify ammonia nitrogen, an aeration pipe component 732 is started to provide necessary dissolved oxygen DO for aerobic biological reaction, and in the range of 2-4mg/L, a part of the organic matters in the sewage is used for synthesizing new cells by the microorganisms on the active sludge and the polyamino block 731 under the aerobic condition, subjecting another part of the organic matter to catabolism to obtain the energy required for cellular synthesis, the end product of which is CO₂And H₂O and other stable substances are oxidized, organic nitrogen in the sewage is oxidized into ammonia nitrogen, the ammonia nitrogen is further converted into nitrite and nitrate under the conditions of sufficient dissolved oxygen DO and long sludge age, in addition, under the aerobic condition, the PHB in the body is aerobically decomposed by the polyacid bacteria, the released energy is used for cell synthesis, proliferation and absorption of phosphorus in the sewage to synthesize polyphosphate, the polyphosphate is discharged after the residual sludge is precipitated and concentrated, the dephosphorization of the sewage is realized, the poly-amino acid block 731 arranged in the aerobic section 703 is a nitrifying bacteria which is sensitive to the fixing and proliferation conditions, slow in proliferation speed, long in generation period and weak in competitiveness, a good environment is provided for improving the nitrification reaction effect, air supply required by the aerobic reaction is provided by an aeration component 732 and an air supply fan 14 connected with the aeration component, the A2/O biochemical pool 7 utilizes three different environments of anaerobic degradation and aerobic reaction and organic cooperation of different microbial floras, can have the functions of removing organic matters and removing phosphorus and nitrogen at the same time, and the design and control parameters of the A2/O biochemical pool 7 are as follows: the hydraulic retention time of the anaerobic section is 2 hours, the anoxic section is 8 hours, the aerobic section is 36 hours, the sludge reflux ratio is 50-100 percent, the nitrifying liquid reflux ratio is 400 percent, the sludge concentration is 500mg/L, and the solubility anaerobic section DO is<0.2mg/L, the DO of the anoxic section is 1-1.5mg/L, the DO of the aerobic section is 2-4mg/L, the effluent of the A2/O biochemical pool 7 enters the coagulation section 801 from an effluent pipe 734 of the aerobic section and a coagulation section inlet pipe 811 of a coagulation sedimentation pool 8, a coagulation mixer 812 is started and a bio-flocculant is added with the addition amount of 10mg/g to strengthen the bio-flocculation, the effluent after the coagulation reaction enters the sedimentation section 802 from a coagulation section overflow hole 813, the sludge and water are separated by an inclined pipe assembly 821, the separated sludge enters the sludge concentration pool 9 from a bottom overflow hole 822 to be concentrated and then enters the solid working procedure, the separated supernatant enters an intermediate water outlet hole 803 from the sedimentation section, and then enters the biological filter bed 10 from an intermediate water tank lifting pump 831, an intermediate water tank water outlet pipe 832 and a biological filter bed inlet pipe 1001 connected with the intermediate water tank 832, the reaction time of the coagulation section is 30 minutes, the retention time of the settling section is 2h, water entering the biological filter bed 10 flows downwards through the biological filter material 1005, the cushion layer 1004 and the filter head assembly 1003, then enters the bottom water collecting chamber 1002 after being filtered, because the straw fragment section contains a large amount of crude fibers, lignin, mineral substances and the like, has good toughness and porosity and large specific surface area, organic matters in sewage are degraded through the action of straw fragment blocks and microorganisms attached to the straw fragment blocks, nitrogen, phosphorus and water discharged from the biological filter bed 10 enter the ecological artificial wetland 11 through the biological filter bed water outlet pipe 1006 and the water distribution tank water inlet pipe 1111 connected with the biological filter bed water outlet pipe 1006, the filtering speed of the biological filter bed 10 is 4m/h, the water entering the ecological artificial wetland 11 water distribution tank 1101 is provided with a water distribution tank 1103 and a water distribution pipe 1125 in the water distribution layer 1124 connected with the biological filter bed 1103, and then flows downwards through the wetland segment block material 1103 and the water collecting pipe 1122 in the water collecting layer 1121, and then enters the water collecting tank, the water distribution layer 1124 is provided with a soil layer 1126, wetland plants 1127 are planted on the soil layer, the wetland plants are cresses, the ecological artificial wetland 11 utilizes the combined action of the matrix wetland block 1123 and plant microorganisms to filter, deposit, adsorb and complex deposit pollutants and degrade and convert the pollutants, so that organic matters, nitrogen and phosphorus are purified and removed, the effluent of the ecological artificial wetland 11 enters the aquatic plant stabilization pond 12 from the water collecting tank outlet pipe 1131 and the stabilization pond inlet pipe 1201 connected with the water collecting tank outlet pipe, the retention time of the ecological artificial wetland 12 is 48 hours, and the effluent enters the aquatic plant stabilization pond 12The effluent in the pond passes through a precipitation plant belt 1202, a sewage plant belt 1203 and the root and stem of a water pushing plant belt 1204 which are arranged in the pond to ensure that organic matters, nitrogen and phosphorus in the water are co-precipitated and absorbed in a body, meanwhile, a biomembrane generated around the rhizome of the aquatic plant and a plurality of functions of organic matter precipitation, filtration, adsorption, decomposition, nitrogen and phosphorus adsorption, nitrification, denitrification and the like generated at the sludge boundary are utilized to deeply purify and stabilize the water quality, the effluent of the aquatic plant stabilization pond 12 enters an ecological ditch 13 from a stabilization pond water outlet pipe 1205 and an ecological ditch water inlet pipe 1305 connected with the stabilization pond, the retention time of the aquatic plant stabilization pond is 96 hours, after the effluent enters the ecological ditch 13, the aquatic pollutants are further adsorbed and decomposed due to the biological chain action of herbaceous plants planted in ecological cement porous bricks 1302 on two side slopes and water pushing plants 1304 at the bottom of the ecological ditch 1303, promoting the growth of microorganisms and playing a role of safe water delivery, the effluent of the ecological ditch 13 is output by an outlet pipe 1306 of the ecological ditch and is reused for farmland irrigation or aquaculture water, if the effluent is reused for aquaculture water, disinfection treatment is carried out, the water flow speed of the ecological ditch 13 is 1m/s, after the treatment by the method, the water quality is that CODcr (chemical oxygen demand) is less than or equal to 100mg/L, BODS (biochemical oxygen demand) is less than or equal to 30mg/L, NH (NH) is adopted₃N (ammonia nitrogen content) is less than or equal to 20mg/L, TP (total phosphorus) is less than or equal to 3mg/L, and the water quality is superior to a target standard value in farmland irrigation water quality.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a biological ecological retrieval and utilization facility of administering of live pig breeding waste water, includes dirty collecting pit (1) of excrement, grille well (2), sieve dry and wet separating centrifuge (3), methane-generating pit (4), anaerobism sink equalizing basin (5), blow off pond (6), biochemical pond (7) of A2/O, coagulating sedimentation tank (8), sludge concentration tank (9), biological filter bed (10), ecological constructed wetland (11), pond (12) are stabilized to aquatic plant, ecological ditch (13) and air feed fan (14), its characterized in that: the front end of the excrement collecting pool (1) is provided with an excrement inlet pipe (101), the rear end of the excrement collecting pool (1) is provided with an excrement outlet pipe (102), the inner side of the excrement collecting pool (1) is provided with a vertical mixer (103), one end of the excrement outlet pipe (102) is provided with a grid well (2), the inside of the grid well (2) is provided with a grid (201), the inside of the grid well (2) is provided with a grid well lifting pump (202), one side of the grid well (2) is provided with a sieve plate dry-wet separator (3), one side of the sieve plate dry-wet separator (3) is provided with a methane tank (4) through a pipeline, the inside of the methane tank (4) is provided with a fermentation room (401), one side of the methane tank (4) is provided with an anaerobic adjusting tank (5), one side of the anaerobic adjusting tank (5) is provided with an air stripping tank (6), an A2/O biochemical pool (7) is arranged on one side of the air stripping pool (6), a coagulating sedimentation pool (8) is arranged on one side of the A2/O biochemical pool (7), a sludge concentration pool (9) is arranged on one side of the coagulating sedimentation pool (8), a biological filter bed (10) is arranged on one side of the sludge concentration pool (9), an ecological artificial wetland (11) is arranged on one side of the biological filter bed (10), an aquatic plant stabilizing pond (12) is arranged on one side of the ecological artificial wetland (11), an ecological ditch (13) is arranged on one side of the aquatic plant stabilizing pond (12), ecological cement porous bricks (1302) are laid on an original soil layer (1301) of the ecological ditch (13), herbaceous plants (1303) are arranged in the ecological cement porous bricks (1302), and water pushing plants (1304) are planted at the bottom of the ecological ditch (13), ecological irrigation canals and ditches (13) head end is provided with ecological irrigation canals and ditches inlet tube (1305), ecological irrigation canals and ditches (13) tail end is provided with ecological irrigation canals and ditches outlet pipe (1306), one side of ecological irrigation canals and ditches (13) is provided with air supply fan (14).

2. The facility for biologically and ecologically treating and recycling the pig breeding wastewater as claimed in claim 1, is characterized in that: the ecological artificial wetland (11) comprises a water distribution tank (1101), wetland sections (1102) and a water collection tank (1103), wherein a water distribution tank water inlet pipe (1111) is arranged on the upper part of the tank wall at the front end of the water distribution tank (1101), a water distribution tank water outlet pipe (1112) is arranged on the tank wall at the rear end of the water distribution tank (1101), the wetland sections (1102) are arranged on the rear side of the common wall of the tank wall at the rear end of the water distribution tank (1101), a water collection layer (1121) is arranged at the bottom of the wetland sections (1102), a water collection pipe (1122) is arranged in the middle of the water collection layer (1121), the water collection pipe (1122) consists of a first main pipe and a first branch pipe, the first main pipe and the first branch pipe are arranged in a non-character shape, a plurality of first holes with the diameter of 10mm are formed in the first branch pipe, the hole spacing between the adjacent first holes is 200mm, the wetland sections (3) are arranged on the water collection layer (1121), a water distribution layer (1123) is provided with a water distribution layer (1124), be provided with water distributor (1125) in the middle of water distribution layer (1124), water distributor (1125) are responsible for by the second and the second branch pipe is constituteed, and the second is responsible for and the second branch pipe is non-style of calligraphy and arranges, and the second branch pipe is 45 degrees skew staggers down along central line both sides and has offered the second punchhole that the several diameter is 8mm, and the hole interval between the adjacent second punchhole is 250mm, be provided with soil horizon (1126) on water distribution layer (1124), it has wetland plant (1127) to plant on soil horizon (1126), wetland section (1102) rear end cell wall is provided with water catch bowl (1103) altogether, water catch bowl (1103) rear end cell wall upper portion is provided with water catch bowl outlet pipe (1131).

3. The facility for biologically and ecologically treating and recycling the pig breeding wastewater as claimed in claim 1, is characterized in that: a stabilization pond water inlet pipe (1201) is arranged at the front end of the aquatic plant stabilization pond (12), a submerged plant belt (1202) is arranged at the bottom of the aquatic plant stabilization pond (12), a floating plant belt (1203) is planted on a bottom slope of the aquatic plant stabilization pond (12), a water pushing plant belt (1204) is planted on the pond edge of the aquatic plant stabilization pond (12), and a stabilization pond water outlet pipe (1205) is arranged at the rear end of the aquatic plant stabilization pond (12).

4. The facility for biologically and ecologically treating and recycling the pig breeding wastewater as claimed in claim 1, is characterized in that: sieve is wet separating centrifuge (3) futilely includes even workbin, stainless steel screen cloth, sieve plate case and frame, and sieve plate case downside is provided with solid sediment pipe (301) of slagging tap, the top of methane-generating pit (4) is provided with feed inlet (402) and air duct (406), the terminal pool wall of fermenting room (401) is provided with discharging pipe (403), discharging pipe (403) one end is provided with between the ejection of compact (404), the end of discharging room (404) is provided with marsh gas drain pipe (405).

5. The facility for biologically and ecologically treating and recycling the pig breeding wastewater as claimed in claim 1, is characterized in that: the utility model discloses an anaerobism sink adjustment tank, including the anaerobism sink section and adjust the section, anaerobism sink section lower part is the awl fill type, anaerobism sink section front end cell wall and be provided with anaerobism sink adjustment tank inlet tube (501), anaerobism sink the section back wall and be provided with guide plate (502), anaerobism sink section back end cell wall upper portion and be provided with outlet chute (503) and back wall discharge orifice (504), anaerobism sink the section bottom and be provided with anaerobism sink adjustment tank mud pipe (505), it is provided with anaerobism sink adjustment tank outlet pipe (506) to adjust section back end cell wall, one side of anaerobism sink adjustment tank outlet pipe (506) is provided with coagulating sedimentation pond (8).

6. The facility for biologically and ecologically treating and recycling the pig breeding wastewater as claimed in claim 1, is characterized in that: blow the front end pool wall design water level department in taking off pond (6) and be provided with and blow off pond inlet tube (601), the bottom of blowing off pond (6) is provided with and blows off air pipe (602), blow off air pipe (602) and keep away from the one end of blowing off pond (6) and link to each other with air feed fan (14), blow off air pipe (602) and be responsible for by the third and the third branch pipe constitutes, the third is responsible for and the third branch pipe is non-style of calligraphy and arranges, third branch pipe both sides pipe wall outwards separates 45 degrees and sets up the third punchhole that the several has 3-5mm, and the hole interval between the adjacent third punchhole is 100mm, it is provided with and blows off pond outlet pipe (603) to blow off pond rear end pool wall upper portion.

7. The facility for biologically and ecologically treating and recycling the pig breeding wastewater as claimed in claim 1, is characterized in that: the A2/O biochemical pool (7) comprises an anaerobic section (701), an anoxic section (702) and an aerobic section (703), wherein an anaerobic section water inlet pipe (711) is arranged on the upper portion of a pool wall at the front end of the anaerobic section (701), a soft lump material (712) is arranged inside the A2/O biochemical pool (7), a sludge return pipe (713) is arranged at the bottom of the A2/O biochemical pool (7), a overflowing hole A (714) is arranged on a pool wall at the rear end of the anaerobic section (701), the anoxic section (702) is arranged on the rear side of the common wall of the pool wall at the rear end of the anaerobic section (701), a combined lump material (721) is arranged inside the anoxic section (702), an underwater impeller is arranged at the bottom of the A2/O biochemical pool (7), a nitrified liquid return pipe (723) is arranged at the bottom of the pool wall of the A2/O biochemical pool (7), and an overflowing hole (724) is arranged on the rear wall of the anoxic section (702), an aerobic section (703) is arranged on the rear side of the common wall of the rear end tank wall of the anoxic section (702), a poly-amino acid lump material (731) is arranged in the aerobic section (703), the poly-amino acid lump material (731) is filled in a compartment formed by an upper steel wire mesh and a lower steel wire mesh, the filling rate is 50%, an aeration pipe assembly (732) is arranged at the tank bottom of the aerobic section (703), the aeration pipe assembly (732) is connected with an air supply fan (14), a nitrified liquid reflux pump (733) is arranged at the bottom of the rear end tank wall of the aerobic section (703), and an aerobic section water outlet pipe (734) is arranged at the upper part of the rear end tank wall of the aerobic section (703).

8. The facility for biologically and ecologically treating and recycling the pig breeding wastewater as claimed in claim 1, is characterized in that: the coagulating sedimentation tank (8) comprises a coagulating section (801), a sedimentation section (802) and a middle water tank (803), wherein a coagulating sedimentation section water inlet pipe (811) is arranged on the upper part of the tank wall at the front end of the coagulating section (801), a coagulating mixer (812) is arranged in the coagulating sedimentation tank (8), a coagulating section overflowing hole (813) is arranged at the middle lower part of the tank wall at the rear end of the coagulating sedimentation tank (8), the sedimentation section (802) is arranged at the rear side of the tank wall at the rear end of the coagulating sedimentation tank (801) in common wall, an inclined pipe assembly (821) is arranged in the coagulating sedimentation tank (8), the inclined pipe assembly (821) consists of a support and an inclined pipe column, a bottom sludge passing hole (822) is arranged at the bottom of the coagulating sedimentation tank (8), a sludge reflux pump (824) is arranged at the bottom of the coagulating sedimentation tank (8), a sedimentation section water outlet hole (823) is arranged on the tank wall at the rear end of the coagulating sedimentation tank (8), the rear side of the rear end pool wall of the settling section (802) is provided with a middle water tank (803), the bottom of the middle water tank (803) is provided with a middle water tank lifting pump (831), and the rear end pool wall of the middle water tank (803) is provided with a middle water tank water outlet pipe (832).

9. The facility for biologically and ecologically treating and recycling the pig breeding wastewater as claimed in claim 1, is characterized in that: biological filter bed inlet tube (1001) and filter plate filter head subassembly (1003) are provided with on biological filter bed (10) front end cell wall upper portion and design water level parallel and level department, the space between biological filter bed (10) bed bottom and filter plate filter head subassembly (1003) is catchmented room (1002), and filter plate filter head subassembly (1003) comprises filter plate and filter head, be provided with bed course (1004) in biological filter bed (10), be provided with biological filter material (1005) on bed course (1004), catchment room (1002) rear end cell wall is provided with biological filter bed outlet pipe (1006).

10. An implementation method of the facility for biologically and ecologically treating and recycling the pig breeding wastewater according to any one of claims 1 to 9 comprises the following specific steps:

s3, the manure slag separated by the sieve plate dry-wet separator (3) enters a solid composting process through a solid slag discharging pipe (301), the separated sewage enters a fermentation chamber (401) of the methane tank (4) through a feeding hole (402) of the methane tank (4), the fermented and decomposed sewage enters a discharging chamber (404) through a discharging pipe (403), and then enters an anaerobic regulating tank (5) through a methane tank liquid outlet pipe (405) and an anaerobic regulating tank water inlet pipe (501) connected with the methane tank, and the methane generated by the methane tank (4) is led out through a gas guide pipe (406) to enter a methane pipeline and is connected with energy for cooking supply of a farmer kitchen;

s6, after sewage enters an anaerobic section (701) of an A2/0 biochemical pool (7), most CODcr is removed under the action of anaerobic bacteria, in addition, the sludge in the coagulation sedimentation pool (8) is pumped and conveyed to the phosphorus accumulating bacteria in the returned sludge of the anaerobic section (701) by a sludge reflux pump (824) to be suppressed and release phosphate in vivo, energy is generated to absorb and degrade organic matters, the organic matters are lightened into PHB in cells and stored, the anaerobic release of phosphorus is completed in the process, a soft block material (712) is arranged in the anaerobic section (701) to form an anaerobic biomembrane, effluent after biological treatment in the anaerobic section (701) enters an anoxic section (702) from a overflowing hole A (714) to degrade the organic matters and denitrify, an underwater propeller (722) is started to provide necessary dissolved oxygen for the denitrification reaction, and the dissolved oxygen is in the range of 0.5-1.5mg/L, under the anoxic condition, denitrifying bacteria use organic carbon in sewage as an electron donor and nitrate as an electron acceptor to perform anaerobic respiration, nitrate nitrogen in nitrifying liquid which flows back to an anoxic section (702) through a nitrifying liquid reflux pump (733) and a nitrifying liquid reflux pipe (723) arranged in the anoxic section (703) is reduced into nitrogen to be released, the denitrifying process is completed, a combined block material (721) is arranged in the anoxic section (702), effluent water treated by anoxic organisms in the anoxic section enters the aerobic section (703) through a overflowing hole B (724) to oxidize organic matters and nitrify ammonia nitrogen, an aeration pipe assembly (732) is started to provide necessary dissolved oxygen DO for aerobic biological reaction, and active sludge and microorganisms on a poly-amino acid block material (731) under the aerobic condition are used for synthesizing new cells, decomposing and metabolizing the other part of organic matters to obtain energy required by cell synthesis, oxidizing the organic matters, oxidizing organic nitrogen in the sewage into ammonia nitrogen, further converting the ammonia nitrogen into nitrite and nitrate, performing aerobic decomposition on PHB in the sewage by using polyacid bacteria under aerobic conditions to realize dephosphorization of the sewage, wherein a polyamino acid block (731) is arranged in an aerobic section (703), gas supply required by aerobic reaction is provided by an aeration component (732) and a gas supply fan (14) connected with the aeration component, and the design and control parameters of an A2/O biochemical pool 7 are as follows: the hydraulic retention time of the anaerobic section is 2h, the anoxic section is 8h and the aerobic section is 36h, the sludge reflux ratio is 50-100%, the nitrifying liquid reflux ratio is 400-;

the water discharged from the S7 and A2/O biochemical pool (7) enters a coagulation section (801) from an aerobic section water outlet pipe (734) and a coagulation section water inlet pipe (811) of a coagulation sedimentation pool (8), a coagulation stirrer (812) is started, a biological flocculant is added, the adding amount is 10mg/g, the discharged water after coagulation reaction enters a sedimentation section (802) from a coagulation section overflowing hole (813), sludge-water separation is carried out through an inclined pipe assembly (821), separated sludge enters a sludge concentration tank (9) from a bottom overflowing hole (822) to be concentrated and then enters a solid composting process, separated supernatant enters an intermediate water tank (803) from a water outlet hole of a precipitation section, and then enters a biological filter bed (10) from an intermediate water tank lifting pump (831), an intermediate water tank water outlet pipe (832) and a biological filter bed water inlet pipe (1001) connected with the intermediate water tank water outlet pipe, the reaction time of a coagulation section is 30 minutes, and the retention time of the precipitation section is 2 hours;

s8, filtering water entering the biological filter bed (10) through a biological filter material (1005), a cushion layer (1004) and a filter plate and filter head assembly (1003), then entering a bottom water collecting chamber (1002), wherein the effluent of the biological filter bed (10) enters the ecological artificial wetland (11) through a biological filter bed water outlet pipe (1006) and a water distribution tank water inlet pipe (1111) connected with the biological filter bed water outlet pipe, and the filtering speed of the biological filter bed (10) is 4 m/h;

s9, water entering a water distribution tank (1101) of an ecological artificial wetland (11) is provided with a water distribution tank water outlet pipe (1112) and a water distribution pipe (1125) in a water distribution layer (1124) of a wetland section (1102) connected with the water distribution tank water outlet pipe, the water enters the water collection tank (1103) after downward flow filtration and adsorption through a block material (1123) of the wetland section and a water collection pipe (1122) in a water collection layer (1121), a soil layer (1126) is arranged on the water distribution layer (1124), wetland plants (1127) are planted in the soil layer, the ecological artificial wetland (11) utilizes the combined action of the block material (1123) of the substrate wetland section and plant microorganisms to filter, deposit, adsorb and complex deposit pollutants and degrade and convert the pollutants, so that the organic matters, nitrogen and phosphorus are purified and removed, water outlet of the ecological artificial wetland (11) enters a plant stabilization water inlet pipe (12) from the water collection tank water outlet pipe (1131) and a stabilization water inlet pipe (1201) connected with the ecological artificial pond, the retention time of the ecological artificial wetland (12) is 48 h;

s10, enabling the effluent entering the aquatic plant stabilization pond (12) to pass through a precipitation plant zone (1202) and a sewage plant zone (1203) arranged in the pond, pushing the roots and stems of the water plant zone (1204) to enable organic matters, nitrogen and phosphorus in the water to be co-precipitated into a whole body to absorb and purify the water quality, and enabling the effluent of the aquatic plant stabilization pond (12) to enter an ecological ditch 13 through a stabilization pond water outlet pipe 1205 and an ecological ditch water inlet pipe 1305 connected with the stabilization pond;

s11, after the effluent enters the ecological ditch (13), due to the biological chain effect of herbaceous plants (1303) planted in the ecological cement perforated bricks (1302) on the two side slopes and water pushing plants (1304) at the bottom of the ecological ditch, pollutants in water are further adsorbed and decomposed, the growth of microorganisms is promoted, and the effluent of the ecological ditch (13) is output by an ecological ditch water outlet pipe (1306) and is reused for water for farmland irrigation or aquaculture.