CN114105414A

CN114105414A - Sewage biological treatment and tail water in-situ recycling system and process

Info

Publication number: CN114105414A
Application number: CN202111448360.4A
Authority: CN
Inventors: 林希光; 林晶; 王素云; 林浩; 林仁放
Original assignee: Fujian Zhongwei Xialin Biotechnology Co ltd
Current assignee: Fujian Zhongwei Xialin Biotechnology Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-03-01

Abstract

The invention discloses a sewage biological treatment and tail water in-situ recycling system and a process, which comprises a deslagging system applying natural sedimentation, solid-liquid separation and microbial degradation, a carrier microorganism quick activation and sustained addition system, and an oxygen supply and water evaporation system applying fan nano aeration; a buried type covering and heat-insulating system for improving microbial activity; the six subsystems of foam pressing, tail water recycling and the like for preventing foam from overflowing are connected through pipelines and gate valves to form a system combination which is mutually related, has complementary functions and runs stably; the beneficial microorganisms can grow and reproduce quickly in the process of biologically degrading pollutants, the activity is strong, and the sewage treatment effect is improved; the in-situ recycling of the pig farm tail water saves water resources, removes bad smell, reduces mosquitoes and flies, and improves the environment of a culture area.

Description

Sewage biological treatment and tail water in-situ recycling system and process

Technical Field

The invention relates to the technical field of biological sewage treatment, in particular to a system and a process for biological sewage treatment and in-situ recycling of tail water.

Background

China is a country seriously lack of water resources. With the improvement of the living standard of people, the livestock and poultry breeding industry in China is developed rapidly, and the problems that the water consumption for livestock and poultry breeding is increased suddenly, the sewage pollutes the environment seriously and the like are brought along. The chemical oxygen demand discharged by livestock and poultry breeding industry all over the country reaches 1268.26 ten thousand tons, which accounts for 96 percent of the total amount discharged by agricultural sources; the total nitrogen and phosphorus emissions were 102.48 and 16.04 million tons, accounting for 38 and 56% of the total agricultural source emissions, respectively. The livestock and poultry breeding wastewater becomes the third pollution source after the industrial wastewater and the domestic sewage. Therefore, how to save water resources and treat the livestock and poultry breeding wastewater in a large scale becomes a problem to be solved urgently.

The culture wastewater mainly comprises livestock and poultry manure urine, flushing sewage, domestic sewage and the like, has the characteristics of large manure content, heavy fishy smell, more domestic impurities, suspended matters, pathogenic microorganisms, high organic pollutants, ammonia nitrogen and total phosphorus concentration and the like, and has the characteristics of large wastewater quantity, difficult treatment and absorption, serious environmental pollution and the like. In the prior art, three methods are mainly used for treating the aquaculture wastewater: returning to fields (including planting and breeding combination), ecological treatment and bioreactor treatment; the returning treatment is a traditional treatment method, the wastewater is directly discharged into a farmland to improve the fertility of soil and improve the yield of crops, but the returning treatment of the cultivation wastewater is limited by the bearing capacity of land resources, and improper treatment easily causes secondary pollution sources and ecological damage of plants, particularly, the south has less land for consumption, more mountains, more water nets and more rain, and the cultivation wastewater goes up the mountains and returns to the farmland, so that the secondary pollution condition is more easily caused; the ecological treatment mainly adopts the modes of artificial wetland, stable pond and the like, and utilizes the combined action between microorganisms and plants to treat the wastewater and then discharge the wastewater after reaching the standard, the method has more prominent advantages compared with returning the wastewater to the field, but has obvious defects, such as large occupied area, large influence on treatment effect caused by season and temperature change, and the release of pollutants is easily caused to form new pollution if the treatment is improper; the most common method is to discharge the wastewater after reaching the standard after the wastewater is treated by a bioreactor, and anaerobic treatment reactors comprise UASB (upflow anaerobic sludge blanket), CSTR (complete mixing anaerobic reactor), ABR (anaerobic baffled reactor) and the like; the common aerobic reactors comprise an oxidation ditch, SBR (sequencing batch reactor), a biological filter and the like, but the treatment mode of the existing bioreactor also has the problems of high cost, more control nodes, high operation difficulty, high requirement on personnel quality, and the like, so that the bioreactor is difficult to popularize and popularize, and the ecological treatment can realize the resource utilization of wastewater. In recent years, researches on methods for treating sewage by using biochemical and biological reactors mainly focus on the researches on process composition, microbial strains and carriers which reach the emission standard, and the resource utilization research and practical application lag behind the in-situ recycling of treated wastewater. Therefore, the method has the advantages of practical process, water resource saving, small land area for sewage treatment, low cost, simple maintenance and operation, stable operation and cyclic utilization of the wastewater in the process of treating the aquaculture wastewater by the microorganisms, and is a problem to be solved urgently.

The influence of temperature on microorganisms is very wide, and although some types of bacteria are also active in a high-temperature environment (50-70 ℃) and a low-temperature environment (5-0 ℃), the most suitable temperature range for the growth of most microorganisms in sewage treatment is 20-30 ℃. In a proper temperature range, the physiological activity of the microorganisms is vigorous, and the treatment effect is better. Beyond this range, the activity of the microorganism becomes poor and the biological reaction process is affected. Therefore, proper treatment temperature needs to be maintained in the sewage treatment process to create a good environment for the propagation and growth of microorganisms and improve the activity of the microorganisms.

Disclosure of Invention

In order to overcome the problems in the prior art, the invention provides a system and a process for biological sewage treatment and in-situ recycling of tail water, which adjust non-biological factors (temperature, air, sunlight, clear liquid clarity, flow rate and the like) serving biological factors after selecting compound strains, wherein the system consists of six subsystems of deslagging, quick activation of solid carrier microorganisms, heat preservation, pressure bubble, oxygen supply water evaporation, tail water recycling and the like, and the subsystems are mutually associated, correspond to each other and circulate continuously, so that the quick growth and propagation of beneficial microorganisms in the biological sewage treatment process are promoted, vigorous activity is kept, and the sewage treatment effect is improved; the process is simple and convenient to operate, economical and practical, and the investment and the operation and maintenance cost are greatly reduced.

The technical scheme of the invention is as follows:

a sewage biological treatment and tail water in-situ recycling utilization system comprises a deslagging system applying natural sedimentation, solid-liquid separation and microbial degradation, a solid carrier microbial rapid activation and sustained addition system, an oxygen supply and water evaporation system for nano aeration, a submerged covered heat preservation system for improving microbial activity and a pressure bubble system and a tail water recycling system for preventing foam overflow, wherein the six subsystems are connected through pipelines and gate valves to form a system combination with complementary functions;

the deslagging system comprises a sewage collecting tank communicated with pig house excrement and sewage, a sedimentation tank communicated with the sewage collecting tank through a pipeline and a gate valve, and a spiral shell stacking machine for performing dry-wet separation on sediments at the bottom of the sedimentation tank, wherein the excrement and the dregs separated by the spiral shell stacking machine are conveyed to a sunlight excrement and dreg shed, and separated filtrate flows back to the sedimentation tank;

the covered heat preservation system comprises a buried primary aerobic tank, a secondary aerobic tank and a tertiary aerobic recycling tank which are connected with the sedimentation tank through pipelines and gate valves and are sequentially communicated with one another;

the solid carrier microorganism rapid activation and holding system is a suspended biological rapid activator, is arranged in the primary aerobic tank and can rapidly activate the composite beneficial microorganisms in the solid carriers;

the oxygen supply and moisture evaporation system comprises a fan room and an oxygen supply pipeline; the oxygen supply pipeline is led out by a Roots blower of the fan room and then laid above the primary aerobic tank, the secondary aerobic tank and the tertiary aerobic recycling tank, and wind is sent to the bottoms of the primary aerobic tank, the secondary aerobic tank and the tertiary aerobic recycling tank through a plurality of vertical oxygen supply pipelines, and the bottom of each vertical oxygen supply pipeline is also provided with a spiral circulating aeration pipe;

the bubble pressing system comprises bubble pressing pipelines arranged around the inner sides of the tops of the primary aerobic tank, the secondary aerobic tank and the tertiary aerobic recycling tank; duckbilled foam pressing devices are also distributed and mounted on the foam pressing pipeline;

the tail water recycling system comprises a tail water recycling pipeline, a water pump, a gate valve and a recycling water meter, wherein the tail water recycling pipeline, the water pump, the gate valve and the recycling water meter are communicated to the pigsty from the three-stage aerobic recycling pool, and the tail water recycling system is used for flushing the pigsty and the excrement and urine tank to recycle the tail water.

Furthermore, the suspended biological rapid activator is connected with a roots blower of the fan room, and comprises a floating barrel, an encapsulating device and an aerator which are arranged from top to bottom and are sequentially suspended and connected by adopting flexible connecting pieces; the packaging device comprises an outer barrel, wherein a plurality of aeration pipes are arranged in the inner cavity of the outer barrel, and a microorganism carrier is filled in the inner cavity of the outer barrel; an air outlet of a Roots blower of the fan room is communicated to the buoy through a vent pipe; the branch pipes are respectively communicated to the aeration pipes and the aerators; and air valve switches are arranged at the connecting ends of the floating barrels, the ventilation pipe and the branch pipes.

Further, the aerator pipe is in a straight pipe shape or a spiral shape; the aeration pipes are distributed in a circumferential array or a rectangular array.

Further, the aerator comprises an aeration disc and an aeration base, wherein the aeration base is of a structure formed by welding stainless steel bars in a shape like a Chinese character 'mu', and the aeration disc is of a circuitous and bent pipe body structure.

Further, the outer cylinder is made of a 40-mesh stainless steel mesh plate.

Furthermore, the primary aerobic tank, the secondary aerobic tank and the tertiary aerobic recycling tank are buried under the ground level, the effective water depth is 2-4 m, the ground level is 1 m, the ground level is buried under the ground level, the ground temperature plays a role in heat preservation, and the ground level is provided with a bubble blocking wall.

Furthermore, the surfaces of the first-stage aerobic tank, the second-stage aerobic tank and the third-stage aerobic recycling tank are covered with heat insulation layers formed by plastic films or canvas and the like.

Further, 1 m of tail water recycling pipeline is arranged on the bottom of the aerobic recycling pool, and the tail water recycling pipeline is connected to the pigsty through a water pump, a gate valve and a recycling water meter.

Furthermore, a pipeline and a gate valve are arranged at an opening in the middle of the sewage collection tank to drain the clear liquid to the sedimentation tank, and a pipeline and a gate valve are arranged at an opening in the middle of the sedimentation tank to drain the clear liquid to the primary aerobic tank; the sedimentation tank is of a semi-submerged type, and the bottom of the sedimentation tank is submerged 1 meter horizontally.

The invention also discloses a microbial treatment and tail water recycling process of the aquaculture sewage, and the microbial treatment and tail water recycling process of the aquaculture sewage are carried out by utilizing the system.

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

the invention provides a system and a process for biological treatment of aquaculture sewage and in-situ recycling of tail water, which mainly comprise six systems with stable operation, such as deslagging, biological quick activation, heat preservation, pressure soaking, oxygen supply water evaporation, tail water recycling and the like, wherein the functions of the subsystems are related to each other, repeated and indispensable, and can promote quick growth and propagation of beneficial microorganisms and keep vigorous activity; the tail water meets the recycling requirement, is recycled in situ for washing a pigsty or a fecaluria tank, and does not discharge to pollute the environment; the manure residues separated at the front end are used as organic fertilizers; clear liquid obtained by deslagging reduces the rear-end microorganism load; the clear liquid also provides energy for growth, reproduction and metabolism for the activated microorganisms; the buried multi-stage aerobic pool can supply oxygen through the Roots blower and simultaneously improve the water temperature, prevent bare exposure in summer from generating high temperature, utilize the ground temperature to keep warm in winter, apply the natural heat preservation characteristic of the stratum and cover the layer at night, build the temperature and environment suitable for the growth of microorganisms and improve the activity of the microorganisms; the pressure bubble system pumps the recycled internal water of the third-stage aerobic pool to the inner sides of the tops of the first-stage aerobic pool, the second-stage aerobic pool and the third-stage aerobic pool, and foams in the punching pool are sprayed out by the duckbilled foam pressing device, so that the direct light action of photosynthetic bacteria can be increased, the activity of flora is improved, the sewage quantity is not increased, and the foam overflow pollution is prevented; the tail water containing beneficial microorganisms is reused for washing the pigsty, so that the excrement is loose and is easy to wash; can quickly remove odor, remarkably reduce mosquitoes and flies, effectively inhibit harmful bacteria from breeding, improve the breeding environment and promote the healthy growth of live pigs. In a word, the tail water resource utilization of the system saves water resources, has small land area for sewage treatment, simple and convenient operation, economy and practicality, greatly reduces investment and operation maintenance cost, has stable system operation, and has obvious sewage treatment effect and social and economic benefits.

The invention sets solid carrier microbe rapid activation and holding device in the first-level aerobic pool, which is composed of carrier packaging device, microbe carrier and special microbe strain (extracted from breeding waste water, safe and reliable), in the microbe reactor, the carrier packaging device is a porous container composed of stainless steel, the middle is set with aeration pipe and microbe carrier, which is a device integrating functions of aeration, filling microbe carrier and rapid activation of carrier microbe, and is a base for microbe survival and reproduction; under the condition of meeting the growth condition of microorganisms, the reactor can quickly generate high-density microbial flora to degrade pollutants, and if the reactor is impacted by harmful substances, the microorganisms are protected by the carrier and the packaging device and can still continuously release beneficial microorganisms, so that the reactor has the capacity of resisting impact and load; meanwhile, under the oxygen supply of the fan, the carrier microorganisms filled in the packaging device can be quickly activated and pushed out under the action of the pressure of the fan, and the microorganisms enter a water body to breed and grow under the aerobic condition to play a role.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

FIG. 2 is a schematic diagram of the positions of a primary aerobic tank and a suspended biological rapid activator in the invention;

FIG. 3 is a schematic view of the overall structure of the suspended biological rapid activator of the present invention;

FIG. 4 is a schematic diagram of the structure of various forms of aeration tubes in the suspended biological rapid activator of the present invention;

FIG. 5 is a process flow diagram of the cultivation wastewater treatment according to the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1-a sewage collecting tank; 2-a sedimentation tank; 3-stacking the snails; 4-a pipeline; 41-tail water recycling pipeline; 5-a gate valve; 6-sunshine manure shed; 7-a first-stage aerobic tank; 8-a secondary aerobic tank; 9-three-stage aerobic recycling tank; 10-a water pump; 11-a bulb tube; 12-duckbill foam press; 13-a fan room; 14-an oxygen supply conduit; 15-vertical oxygen supply pipes; 16-spiral circulation aeration pipe; 17-suspended bio-rapid activator; 18-an insulating layer; 19-bubble blocking wall; 20-a buoy; 21-an encapsulator; 22-an outer cylinder; 23-an aerator pipe; 24-a microbial carrier; 25-an aerator; 26-a flexible connection; 27-a vent pipe; 271-a branch pipe; 28-an aeration disc; 29-aeration base; 30-water meter.

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 the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

The microorganisms are beneficial microorganism strains separated from the aquaculture sewage, and comprise nitrobacteria and nitrosobacteria for degrading ammonia nitrogen, saccharomycetes and spore bacteria for degrading COD, denitrifying denitrification and other strains, the microorganisms can generate a plurality of enzyme systems, catalyze and decompose various organic matters in water, remove various odor substances, effectively inhibit the growth of harmful bacteria, and simultaneously can reduce a large amount of sludge in the growth and metabolism processes, the safety levels of the microorganisms belong to the 4 th level of the safety levels of domestic strains, are all safe to people, livestock, animals and the like, and can be used for the treatment of the aquaculture sewage.

Example 1

Referring to fig. 1 to 4, a system for biological sewage treatment and in-situ recycling of tail water comprises a deslagging system applying natural sedimentation, mechanical separation and microbial degradation, a solid carrier microbial rapid activation and sustained addition system, an oxygen supply and water evaporation system for nano aeration, a submerged covered heat insulation system for improving microbial activity, a pressure bubble system for preventing foam from overflowing and a tail water recycling system, wherein the six subsystems are connected through pipelines and gate valves to form a system combination with complementary functions; the wastewater is degraded in a three-stage aeration tank for two to thirty days, so that the water closed-loop production and elimination balance and biological safety are realized, and tail water meets the recycling requirement;

the deslagging system comprises a sewage collecting tank 1 communicated with pig house excrement and sewage, a sedimentation tank 2 communicated with the sewage collecting tank 1 through a pipeline 4 and a gate valve 5, and a spiral shell stacking machine 3 for performing dry-wet separation on sediments at the bottom of the sedimentation tank 2, wherein the excrement and the dregs separated by the spiral shell stacking machine 3 are conveyed to an sunlight excrement and dreg shed 6, and separated filtrate flows back to the sedimentation tank 2; a pipeline 4 and a gate valve 5 are arranged at an opening in the middle of the sewage collecting tank 1 to drain the clear liquid to the sedimentation tank 2, and a pipeline 4 and a gate valve 5 are arranged at an opening in the middle of the sedimentation tank 2 to drain the clear liquid to the buried heat insulation system; the sedimentation tank 2 is of a semi-submerged type, and the bottom of the sedimentation tank sinks to the ground level by 0.5-1 m; under the action of a deslagging system, the coarse molecular manure slag with the concentration of about 85 percent is taken away, and meanwhile, most of heavy metals, salt and other related impurities are also taken away, and the composite microbial degradation in the later period can be carried out, so that the load is reduced, clear liquid is provided, and energy is supplied; clear liquid provided by the sedimentation tank 2 contains organic pollutants such as fine molecules and the like, provides carbon source energy for microorganisms, biochemically degrades and reduces a large amount of organic pollutants in the processes of reproduction, growth and metabolism of the microorganisms, and promotes water purification;

the capping and heat-insulating system comprises a buried primary aerobic tank 7, a secondary aerobic tank 8 and a tertiary aerobic recycling tank 9 which are connected with the sedimentation tank 2 through a pipeline 4 and a gate valve 5 and are communicated with each other in sequence; the primary aerobic pool 7, the secondary aerobic pool 8 and the tertiary aerobic recycling pool 9 are all designed to be circular, are formed by brick stacking and cutting and are buried under the ground, functional pools are built according to daily sewage treatment capacity and proportion, the diameter is 3-16 meters, the functional pools are installed under the ground level, the effective water depth is 2-4 meters, the ground level is 1 meter, the ground level is buried under the ground level, the ground temperature plays a role in heat preservation, and a bubble blocking wall 19 is arranged on the ground level; the primary aerobic tank 7 is communicated with the secondary aerobic tank 8, the secondary aerobic tank 8 is communicated with the tertiary aerobic recycling tank 9 through a pipeline 4, and the pipeline 4 is arranged below the ground level; the surfaces of the primary aerobic tank 7, the secondary aerobic tank 8 and the tertiary aerobic recycling tank 9 are covered with heat-insulating layers 18, when the weather is cold, plastic films or canvas and the like can be covered on each tank at night to form the heat-insulating layers 18, and the heat-insulating cover layer 18 is lifted in the daytime to achieve the effects of heat insulation and microbial activity improvement; the buried covered heat preservation system is beneficial to improving the activity of microorganisms in the processes of growth, reproduction and metabolism, removes colloidal bodies and dissolved organic matters in sewage through the conversion of substances such as nitrification and denitrification, can quickly eliminate the odor of a farm, reduces a large amount of COD, ammonia nitrogen, total phosphorus and other substances, is equivalent to secondary deslagging, reduces a large amount of sludge, and can inhibit the growth of mosquitoes and flies, harmful bacteria and viruses to realize harmlessness in biochemical degradation of a primary aerobic tank 7, a secondary aerobic tank 8 and a tertiary aerobic recycling tank 9 for 20 to 30 days after removal of pollutants;

the solid carrier microorganism rapid activation and holding system is a suspended biological rapid activator 17 which is arranged in the primary aerobic tank 7 and can rapidly activate the composite beneficial microorganisms in the solid carriers;

the oxygen supply and moisture evaporation system comprises a fan room 13 and an oxygen supply pipeline 14; the oxygen supply pipeline 14 is led out by a fan room 13 and then laid above the primary aerobic tank 7, the secondary aerobic tank 8 and the tertiary aerobic recycling tank 9, and wind is sent to the bottoms of the primary aerobic tank 7, the secondary aerobic tank 8 and the tertiary aerobic recycling tank 9 through a plurality of vertical oxygen supply pipelines 15, the bottom of each vertical oxygen supply pipeline 15 is also provided with a spiral circulation type nano aeration pipe 16, and each 7 square meters of the spiral circulation type nano aeration pipe 16 with the diameter of 80 centimeters and a stainless steel base is arranged; under the aeration action of the spiral circulating aeration pipe 16, a large amount of water is evaporated, the water storage amount is greatly reduced, sufficient pool capacity is vacated, and new sewage enters the system for degradation, so that the whole system runs repeatedly, the sewage treatment effect and the safe recycling of the wastewater are ensured, and the water balance is realized, thereby realizing the safe and effective zero discharge of the wastewater resource utilization;

the bubble pressing system comprises a bubble pressing pipeline 11 which is arranged around the inner sides of the tops of the primary aerobic tank 7, the secondary aerobic tank 8 and the tertiary aerobic recycling tank 9; duckbilled foam pressing devices 12 are distributed on the foam pressing pipeline 11 at intervals of 1.5 meters; water in the third-stage aerobic recycling tank 9 is pumped by a water pump 10 and is sent to the first-stage aerobic tank 7, the second-stage aerobic tank 8 and the third-stage aerobic recycling tank 9 through a bubble pressing pipeline 11, and foams in the punching tank are sprayed out by a duckbill-shaped foam pressing device 12;

the tail water recycling system comprises a tail water recycling pipeline 41 leading to the pigsty from the three-stage aerobic recycling pool 9, a water pump 10, a gate valve 5 and a recycling water meter 30; 1 m above the bottom in the aerobic recycling pool 9, a tail water recycling pipeline 41 is arranged, and the tail water is conveyed to a piggery through a water pump 10, a gate valve 5 and a recycling water meter 30; the tail water recycling system is used for flushing a pigsty and a fecaluria groove to realize tail water recycling.

Further, the suspended biological rapid activator 17 is connected with a roots blower in the fan room 13, and the suspended biological rapid activator 17 comprises a buoy 20, a packaging device 21 and an aerator 25 which are arranged from top to bottom and are sequentially suspended and connected by adopting a flexible connecting piece 26; the floating cylinder 20 is also used as a low-pressure gas storage tank (with the pressure bearing of 0.4-0.6 MPa), the hollow structure of the floating cylinder 20 is suspended on the water surface, the packaging device 21 and the aerator 25 are hung on the hollow structure, and the floating cylinder 20 is made of engineering plastics or stainless steel and is corrosion-resistant; the packaging device 21 is used for loading microbial strains and is used as a place for activating the microbial strains, and the microbial strains are discharged out of the packaging device 21 after being activated and released in the packaging device 21; the aerator 25 is responsible for aeration to increase the oxygen content in water and provide an aerobic environment for the continuous survival and growth of microorganisms; the flexible connecting piece 26 is a chain or a rope, the bottoms of the outer walls of the floating barrel 20 and the packaging device 21 are respectively provided with a hook for hanging the upper end of the flexible connecting piece 26, the top of the outer wall of the packaging device 21 and the side wall of the aerator 25 are respectively provided with a hanging ring for fixing the lower end of the flexible connecting piece 26, the length of the flexible connecting piece 26 is determined according to the requirement that the packaging device 21 sinks below the water surface in the pool, namely the floating barrel 20 is 80cm away from the packaging device 21, and the packaging device 21 is 20cm away from the aerator 25, so that the distance among the floating barrel 20, the packaging device 21 and the aerator 25 is further fixed;

the packaging device 21 comprises an outer barrel 22, a plurality of aeration pipes 23 are arranged in the inner cavity of the outer barrel 22, and the air outlet of a roots blower of the fan room is communicated to the buoy 20 through a ventilation pipe 27; the branch pipes 271 are respectively communicated to the aeration pipes 23 and the aerators 25; air valve switches are arranged at the connecting ends of the buoy 20, the ventilation pipe 27 and the branch pipe 271; the aeration pipes 23 are nanotubes, the outer diameter of each aeration pipe is 25mm, the inner diameter of each aeration pipe is 10mm, each aeration pipe 23 is in a straight pipe shape, each aeration pipe 23 is distributed in a single pipe or a circumferential array or a rectangular array, the aeration pipes 23 are uniformly embedded between microorganism carriers 24, the aeration pipes 23 can be distributed in a circumferential array or a rectangular array, oxygen can be uniformly aerated and released to the surrounding microorganism carriers 24, activation of microorganism strains is promoted and the microorganism strains are pushed out, in order to ensure that air pressure is effectively utilized, the left ends of the aeration pipes 23 are communicated with the ventilation pipes 27, the right ends of the aeration pipes are in a closed structure, so that component is discharged from the side faces of the aeration pipes 23, and the air pressure is enough to push the microorganism strains out; in order to improve the effective aeration efficiency of the aeration pipes 23, the aeration pipes 23 can be spiral, and the aeration pipes 23 are distributed according to a circumferential array, compared with the aeration pipes 23 with a branch pipe structure, under the condition that the lengths of the head and tail straight lines are the same, the surface area of the spiral aeration pipe 23 is larger, namely the effective base surfaces of the aeration pipe 23 and the surrounding microorganism carriers 24 are more, so that the microorganism carriers 24 can more fully and uniformly receive aeration oxygen supply, and the activation of microorganism strains is effectively improved;

wherein, the outer cylinder 22 is made of 40-mesh stainless steel mesh plate, under the oxygen supply of the oxygen supply system, each aeration pipe 23 aerates the inner part of the outer cylinder 22, can quickly activate the microorganism carrier 24 filled in the outer cylinder 22, and pushes the microorganism carrier out through the meshes on the outer cylinder 22 under the oxygen supply pressure of the fan room 13; the microorganism carrier 24 is a solid carrier made of a porous material and has a large specific surface area; after the microbial bacteria are planted into the carrier, the microbial bacteria have respective living and breeding spaces and form a carrier biological film; under the condition of meeting the growth condition of microorganisms, the suspended biological rapid activator 17 can rapidly generate high-density microbial flora to degrade pollutants; if the impact of harmful substances is met, the microorganisms are protected by the carrier and can still continuously release beneficial microorganisms; using this principle, the suspended bio-rapid activator 17 has excellent resistance to impact load; can quickly and effectively degrade organic pollutants, inhibit the growth of harmful bacteria, remove odor, reduce the sludge production (equivalent to secondary deslagging), and meet the requirement of improving water quality.

Further, aerator 25 includes aeration base 29 and aeration dish 28, aeration base 29 adopts "mesh" font stainless steel welded structure, and is rust-resistant corrosion-resistant, and aeration dish 28 is circuitous bending pipe body structure, can increase aeration dish 28 surface hole quantity to increase aeration efficiency.

Example 2

Referring to fig. 4, the invention also discloses a microorganism treatment and tail water recycling process for aquaculture sewage, and the specific process flow is as follows:

firstly, feeding breeding sewage into a sewage collection tank 1, after 2-4 hours of still water sedimentation, placing the sewage in the sewage collection tank 1 into a sedimentation tank 2 with a sediment layer at the bottom, a clear liquid layer at the middle and a scum layer at the upper part, standing the sedimentation tank 2 for 2-4 hours after the water feeding of the sedimentation tank 2, pumping the sediments at the bottoms of the sewage collection tank 1 and the sedimentation tank 2 to a screw stacking machine 3 for solid-liquid separation through a pump 14, flowing the separated filtrate into the sedimentation tank 2, and feeding the separated excrement to a sunlight excrement shed 6; forming a circulating deslagging system, separating about 90% of coarse molecular manure residues by a screw stacking machine 3, settling the coarse molecular manure residues in still water in a sewage collecting tank 1 and a sedimentation tank 2, floating fine residues for 2 to 4 hours, and removing small molecular manure residues again to obtain good clear liquid;

secondly, putting the clear liquid in the middle of the sedimentation tank 2 into a primary aerobic tank 7, carrying out sewage treatment on the sewage entering the aerobic tank through aeration and various microorganisms to remove organic matters such as COD (chemical oxygen demand), BOD (biochemical oxygen demand), ammonia nitrogen and the like in the wastewater, treating the sewage by a secondary aerobic tank 8, then flowing into a tertiary aerobic recycling tank 9, and using tail water of the tertiary aerobic recycling tank 9 for washing the pigsty 10 to achieve sewage recycling; the clear liquid in the middle of the sedimentation tank 2 is put into a first-stage aerobic tank 7 according to about 10 percent of the total capacity of the aerobic tank 7 every day, and then automatically flows into a second-stage aerobic tank 8 to a third-stage aerobic recycling tank 9 to provide energy for continuously maintaining and improving the activity of microorganisms; pollutants are subjected to continuous biochemical degradation in the process, and tail water meets the recycling requirement; the water is continuously volatilized and reduced, so that the waste water is eliminated and balanced;

wherein, the foam pressing system pumps water in the third-level aerobic recycling tank 9 to the inner sides of the tops of the first-level aerobic tank 7, the second-level aerobic tank 8 and the third-level aerobic recycling tank 9 through water pipes, and foams in the punching tank are sprayed out through a duckbill type foam pressing device 12; the activity of the flora can be improved, the sewage quantity is not increased, and foam overflow pollution is prevented;

finally, tail water is pumped out by a pipeline 4 and a water pump 10 arranged in a third-stage aerobic recycling tank 9 and is recycled for washing a culture area, a manure groove and the like, and the tail water can also be used for irrigating and maintaining plants.

The water sample monitoring results after the culture sewage is treated by the method provided by the invention are shown in the following table 1:

description of the drawings: through detection, the chemical oxygen demand, ammonia nitrogen and total phosphorus meet the requirement of recycling safety; meanwhile, harmful viruses, namely viral nucleic acids such as swine fever, O-type foot and mouth disease, highly pathogenic porcine reproductive and respiratory syndrome, porcine pseudorabies, African swine fever and the like are not detected in the reuse water.

According to the survey and estimation of the invention, the system process has the advantages in terms of investment and operation cost compared with other modes as shown in the following table 2.

Comparison table 2 of investment running cost of different treatment modes

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be regarded as equivalent replacements within the protection scope of the present invention;

in the description of the invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "two ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the invention.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the terms in the invention is understood by those skilled in the art according to specific situations.

Claims

1. The utility model provides a sewage biological treatment and tail water normal position circulation utilization system which characterized in that: the system comprises a deslagging system applying natural sedimentation, solid-liquid separation and microbial degradation, a solid carrier microbial rapid activation and sustained addition system, an oxygen supply and water evaporation system for nano aeration, a buried covered heat preservation system for improving microbial activity, a foam pressing system for preventing foam from overflowing and a tail water recycling system, wherein the six subsystems are connected through pipelines and gate valves to form a system combination with complementary functions;

the slag removing system comprises a sewage collecting tank (1) communicated with pig house excrement and sewage, a sedimentation tank (2) communicated with the sewage collecting tank (1) through a pipeline (4) and a gate valve (5), and a screw stacking machine (3) for performing dry-wet separation on the sediments at the bottom of the sedimentation tank (2), wherein the excrement and the slag separated by the screw stacking machine (3) are conveyed to a sunlight excrement and slag shed (6), and the separated filtrate flows back to the sedimentation tank (2);

the capping and heat-insulating system comprises a buried primary aerobic tank (7), a secondary aerobic tank (8) and a tertiary aerobic recycling tank (9) which are connected with the sedimentation tank (2) through a pipeline (4) and a gate valve (4) and are communicated with each other in sequence;

the solid carrier microorganism rapid activation and holding system is a suspended biological rapid activator (17) which is arranged in the primary aerobic tank (7) and can rapidly activate the composite beneficial microorganisms in the solid carriers;

the oxygen supply and moisture evaporation system comprises a fan room (13) and an oxygen supply pipeline (14); the oxygen supply pipeline (14) is led out by a Roots blower of the fan room (13) and then laid above the first-stage aerobic tank (7), the second-stage aerobic tank (8) and the third-stage aerobic recycling tank (9), wind is sent to the bottoms of the first-stage aerobic tank (7), the second-stage aerobic tank (8) and the third-stage aerobic recycling tank (9) through a plurality of vertical oxygen supply pipelines (15), and a spiral circulating aeration pipe (16) is further installed at the bottom of the vertical oxygen supply pipeline (15).

The bubble pressing system comprises a bubble pressing pipeline (11) which is arranged around the inner sides of the tops of the primary aerobic tank (7), the secondary aerobic tank (8) and the tertiary aerobic recycling tank (9); a duckbilled foam pressing device (12) is also distributed and mounted on the foam pressing pipeline (11);

the tail water recycling system comprises a tail water recycling pipeline (41) leading to the pigsty from the three-level aerobic recycling pool (9), a water pump (10), a gate valve (5) and a recycling water meter (30), and is used for flushing the pigsty and a fecaluria groove to realize tail water recycling.

2. The system for biological sewage treatment and in-situ tail water recycling as claimed in claim 1, wherein: the suspended biological rapid activator (17) is connected with a Roots blower in a fan room (13), and the suspended biological rapid activator (17) comprises a floating barrel (20), a packaging device (21) and an aerator (25) which are arranged from top to bottom and are sequentially suspended and connected by adopting a flexible connecting piece (26); the packaging device comprises an outer barrel (22), a plurality of aeration pipes (23) are arranged in the inner cavity of the outer barrel (22), and a microorganism carrier (24) is filled in the inner cavity of the outer barrel (22); the air outlet of the Roots blower of the fan room is communicated to the buoy (20) through the vent pipe (27); the branch pipe (271) is respectively communicated to each aeration pipe (23) and the aerator (25); and air valve switches are arranged at the connecting ends of the buoy (20), the ventilation pipe (27) and the branch pipe (271).

3. The system for biological sewage treatment and in-situ tail water recycling as claimed in claim 2, wherein: the aerator pipe (23) is in a straight pipe shape or a spiral shape; the aeration pipes (23) are distributed in a circumferential array or a rectangular array.

4. The system for biological sewage treatment and in-situ tail water recycling as claimed in claim 3, wherein: the aerator (25) comprises an aeration disc (28) and an aeration base (29), wherein the aeration base (29) is of a mesh-shaped stainless steel bar welding structure, and the aeration disc (28) is of a circuitous and bent pipe body structure.

5. The system for biological sewage treatment and in-situ tail water recycling as claimed in claim 3, wherein: the outer cylinder (22) is made of a 40-mesh stainless steel mesh plate.

6. The system for biological sewage treatment and in-situ tail water recycling as claimed in claim 1, wherein: the primary aerobic tank (7), the secondary aerobic tank (8) and the tertiary aerobic recycling tank (9) are buried under the ground level, the effective water depth is 2-4 m under the ground level, the effective water depth is 1 m under the zero level, the ground temperature plays a role in heat preservation when the primary aerobic tank, the secondary aerobic tank and the tertiary aerobic recycling tank are buried under the ground level, and the bubble blocking wall (19) is arranged on the zero level.

7. The system for biological sewage treatment and in-situ tail water recycling as claimed in claim 1, wherein: and heat preservation layers (18) formed by plastic films or canvas and the like are covered on the surfaces of the first-stage aerobic tank (7), the second-stage aerobic tank (8) and the third-stage aerobic recycling tank (9).

8. The system for biological sewage treatment and in-situ tail water recycling as claimed in claim 1, wherein: a pipeline (4) and a gate valve (5) are arranged at an opening in the middle of the sewage collection tank (1) to drain the clear liquid to the sedimentation tank (2), and a pipeline (4) and a gate valve (5) are arranged at an opening in the middle of the sedimentation tank (2) to drain the clear liquid to the primary aerobic tank (7); the sedimentation tank (2) is of a semi-submerged type, and the bottom of the sedimentation tank sinks 1 meter horizontally.

9. The system for biological treatment of aquaculture sewage and in-situ recycling of tail water according to claim 1, which is characterized in that: and a tail water recycling pipeline (41) is arranged on the bottom of the aerobic recycling pool (9) from 1 m, and the tail water recycling pipeline passes through a water pump (10), a gate valve (5) and a recycling water meter (30) to the pigsty.

10. A microbial treatment and tail water recycling process for aquaculture sewage is characterized in that: the system of any one of claims 1 to 9 is used for sewage biological treatment and tail water in-situ cyclic resource utilization.