CN216687831U

CN216687831U - Breeding wastewater treatment device

Info

Publication number: CN216687831U
Application number: CN202123339810.4U
Authority: CN
Inventors: 涂凌波; 林鑫; 黄芳; 冯昭华; 代焕芳; 黄怡然
Original assignee: Fujian Environmental Protection Design Institute Co ltd
Current assignee: Fujian Environmental Protection Design Institute Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-06-07
Anticipated expiration: 2031-12-28

Abstract

The utility model discloses a culture wastewater treatment device, which comprises an anaerobic tank, an anoxic tank, an aerobic tank and a membrane tank which are separated by partition plates and are sequentially communicated; the top parts of the anaerobic tank and the anoxic tank are provided with biogas collecting pipes which are connected to a biogas storage tank; the side wall of the bottom of the anaerobic tank is also provided with a water inlet pipe communicated with an external water body; a nitrifying liquid return pipe is arranged at the top of the anoxic tank, the center of a water inlet end pipe of the nitrifying liquid return pipe is equal to the liquid level of the aerobic tank, and a through hole is formed in the bottom of a water outlet end of the nitrifying liquid return pipe and is arranged at the top of the anoxic tank; a membrane module is arranged in the membrane tank, the membrane module is connected with a water outlet pump through a pipeline, the bottom of the membrane tank is externally connected with a sludge reflux pump, and sludge in the membrane tank is pumped to a sludge reflux port arranged at the bottom of the anaerobic tank or is directly discharged; aeration devices are arranged at the bottoms of the anaerobic tank, the anoxic tank, the aerobic tank and the membrane tank, and the anaerobic tank and the anoxic tank share the recovered methane for circular aeration; the aeration devices of the aerobic tank and the membrane tank are communicated with each other and then externally connected with an air blower for air aeration.

Description

Breeding wastewater treatment device

Technical Field

The utility model particularly relates to a culture wastewater treatment device, and belongs to the technical field of sewage treatment.

Background

With the continuous development of socioeconomic of China, the breeding industry of China develops particularly rapidly, but the sewage generated by the breeding industry has serious influence on the surrounding environment. At present, the main treatment process of the wastewater of pig farms in China adopts an activated sludge method, wherein 'A' is²the/O process is most commonly used, but the electric energy consumption is large in the operation process, so that a plurality of farmers cannot bear the burden for a long time, the normal operation of a wastewater treatment facility is influenced, and simultaneously 'A' is adopted²The TN content of the effluent of the/O process is high, and the effluent is difficult to directly reach the standard and be discharged.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the prior art, the utility model provides a cultivation wastewater treatment device, which is characterized in that²The O and the biological contact oxidation process are combined, and the difference value of the methane pressure generated by the anaerobic tank and the atmospheric pressure is used as the power for the reflux of the nitrified liquid, so that the operation cost is greatly reduced, the manufacturing is convenient, and the effluent quality can be ensured.

The technical scheme of the utility model is as follows:

a cultivation wastewater treatment device comprises an anaerobic tank, an anoxic tank, an aerobic tank and a membrane tank which are separated by partition plates and are sequentially communicated; the top parts of the anaerobic tank and the anoxic tank are provided with biogas collecting pipes which are connected to a biogas storage tank; the side wall of the bottom of the anaerobic tank is also provided with a water inlet pipe communicated with an external water body; a nitrifying liquid return pipe is arranged at the top of the anoxic tank, the center of a water inlet end pipe of the nitrifying liquid return pipe is equal to the liquid level of the aerobic tank, and a through hole is formed in the bottom of a water outlet end of the nitrifying liquid return pipe and is arranged at the top of the anoxic tank; a membrane module is arranged in the membrane tank, the membrane module is connected with a water outlet pump through a pipeline, the bottom of the membrane tank is externally connected with a sludge reflux pump, and sludge in the membrane tank is pumped to a sludge reflux port arranged at the bottom of the anaerobic tank or is directly discharged; aeration devices are arranged at the bottoms of the anaerobic tank, the anoxic tank, the aerobic tank and the membrane tank, and the anaerobic tank and the anoxic tank share the recovered biogas for cyclic aeration; the aeration devices of the aerobic tank and the membrane tank are communicated with each other and then externally connected with an air blower for air aeration.

Further, suspended fillers are arranged in the anaerobic tank and the anoxic tank, light porous fillers are arranged in the aerobic tank, and powdered activated carbon fillers or suspended fillers are arranged in the membrane tank.

Furthermore, be provided with the intercommunication mouth that can communicate adjacent reaction tank on the baffle, set up the graticule mesh on the intercommunication mouth, prevent that each pond internal packing from running off.

Furthermore, one path of air outlet pipe of the methane collecting tank is used for external utilization, and the other path of air outlet pipe is connected to the aeration devices at the bottoms of the anaerobic tank and the anoxic tank through the circulating pump.

Furthermore, the air outlet pipe of the air blower is connected to the water outlet pipe of the membrane component in one path, an electromagnetic valve which is automatically opened and closed is arranged on the pipeline to control the water outlet direction, and the air outlet pipe is connected to the aeration devices at the bottom of the aerobic tank and the membrane tank in another path.

Further, the sludge reflux pump is respectively communicated with a drain pipe and a sludge reflux pipe, partial sludge is discharged outwards through the drain pipe, and partial sludge is refluxed to the anaerobic tank through the sludge reflux pipe; the drain pipe and the sludge return pipe are provided with electromagnetic valves for automatically controlling the sludge direction.

Furthermore, the tank walls of the anaerobic tank, the anoxic tank, the aerobic tank and the membrane tank are all made of heat insulation materials, and a water heater is arranged in each tank to supplement heat loss.

Furthermore, the culture wastewater treatment device can be additionally provided with an anoxic pond/aerobic pond combination, and at least one anoxic pond/aerobic pond is provided.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model provides a culture wastewater treatment device, which is characterized in that²The combination of the/O process and the biological contact oxidation process combines a short-cut nitrification and denitrification process and membrane filtrationThe process is combined, firstly, the difference value of the methane pressure generated by the anaerobic tank and the atmospheric pressure is used as the power for the reflux of the nitrifying liquid, so that the operating cost is greatly reduced; the anaerobic tank and the anoxic tank adopt methane stirring instead of mechanical stirring, so that the stirring efficiency is improved, and the operating cost is reduced; secondly, the heat generated by the anaerobic fermentation of the wastewater in the first step is utilized to maintain the temperature in the system at 35 ℃, so that the operating environment for the subsequent shortcut nitrification and denitrification is ensured; the dissolved oxygen in the aerobic tank is maintained at 1mg/l, compared with the traditional biological treatment, the aeration intensity is reduced, and the operation cost is reduced; finally, by utilizing the efficient interception function of the membrane filtration on the microorganisms, the nitrosobacteria and the denitrifying bacteria growing in the system can be enriched into dominant strains, so that higher microorganism biomass is maintained in the system, the short-cut nitrification function is enhanced, the defect of low microorganism concentration in the short-cut nitrification and denitrification system is overcome, and simultaneously, clear effluent and good water quality are ensured.

2. Compared with the traditional activated sludge method, the short-cut nitrification and denitrification process can reduce the oxygen demand by 25 percent, reduce the carbon source demand by 40 percent and reduce the alkali input by 50 percent, thereby greatly saving the energy consumption.

Drawings

FIG. 1 is a top plan view of a wastewater treatment apparatus for aquaculture according to the present invention;

FIG. 2 is a bottom plan view of the wastewater treatment apparatus for cultivation according to the present invention;

FIG. 3 is a cross-sectional view of FIG. 1;

in the drawings, the reference numbers denote:

1. an anaerobic tank; 2. an anoxic tank; 3. an aerobic tank; 4. a membrane tank; 5. a partition plate; 6. a water inlet pipe; 7. a biogas collecting pipe; 8. a biogas collection tank; 9. a circulation pump; 10. an aeration device; 11. a nitrifying liquid return pipe; 12. a sludge return pipe; 13. a blower; 14. a membrane module; 15. a water outlet pump; 16. suspending the filler; 17. a lightweight porous filler; 18. a sludge reflux pump; 19. a drain pipe; 20. an electromagnetic valve.

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.

Referring to fig. 1 to 3, a cultivation wastewater treatment apparatus includes an anaerobic tank 1, an anoxic tank 2, an aerobic tank 3 and a membrane tank 4 partitioned by a partition plate 5; the anaerobic tank 1, the anoxic tank 2, the aerobic tank 3 and the membrane tank 4 are communicated in sequence through communicating ports formed in the partition plates 5; the top parts of the anaerobic tank 1 and the anoxic tank 2 are provided with a biogas collecting pipe 7, and the biogas collecting pipe 7 can adopt a flower pipe with an opening at the bottom and is connected to a biogas storage tank 8; the side wall of the bottom of the anaerobic tank 1 is also provided with a water inlet pipe 6 communicated with the external water body; a nitrifying liquid return pipe 11 is arranged at the top of the anoxic tank 2, the center of a water inlet end pipe of the nitrifying liquid return pipe 11 is as high as the liquid level of the aerobic tank 3, and a water outlet end is arranged at the top of the anoxic tank 2 by adopting a floral pipe with a perforated bottom; the membrane module 14 is arranged in the membrane tank 4, the membrane module 14 is connected with a water outlet pump 15 through a pipeline, water in the membrane tank 4 is sucked by the water outlet pump 15 and is filtered by the membrane module 14 and then discharged, the membrane module 14 can be made of a large-aperture cheap membrane material such as a glass fiber pipe, the bottom of the membrane tank 4 is externally connected with a sludge reflux pump 18, the sludge reflux pump 18 is respectively communicated with a drain pipe 19 and a sludge reflux pipe 12, partial sludge is discharged outwards through the drain pipe 19 for phosphorus removal, biological activity is kept, partial sludge in the membrane tank 4 is pumped to a sludge reflux port arranged at the bottom of the anaerobic tank 1 through the sludge reflux pipe 12, and then certain sludge concentration in the anaerobic tank 1 is maintained; the drain pipe 19 and the sludge return pipe 12 are provided with electromagnetic valves 20 for automatically controlling the sludge direction; aeration devices 10 are arranged at the bottoms of the anaerobic tank 1, the anoxic tank 2, the aerobic tank 3 and the membrane tank 4, and the anaerobic tank 1 and the anoxic tank 2 share the recovered biogas for cyclic aeration; the aeration devices 10 of the aerobic tank 3 and the membrane tank 4 are communicated with each other and then externally connected with an air blower 13 for air aeration, and the aeration devices 10 of the aerobic tank 3 and the membrane tank 4 comprise an aeration pump and an aeration pipe.

The anaerobic tank 1 and the anoxic tank 2 are internally provided with suspended fillers 16, the suspended fillers 16 can adopt elastic fillers, carbon fiber fillers and the like, the aerobic tank 3 is internally provided with light porous fillers 17, the light porous fillers 17 can adopt one or more of diatomite, bentonite, ceramsite and the like, the membrane tank 4 is internally provided with powdered activated carbon fillers or suspended fillers, and the communication ports of the partition plates 5 of the two adjacent tanks are provided with grids to prevent the fillers in each tank from losing.

Wherein, the outlet duct of the same way of marsh gas collection tank 8 supplies the outside to utilize, and another way connects to the aeration equipment of anaerobism pond 1, oxygen deficiency pond 2 bottom through circulating pump 9, and aeration equipment 10 that is located anaerobism pond 1 and oxygen deficiency pond 2 bottom contains aeration pipe and aeration dish, utilizes the marsh gas stirring of retrieving to replace mechanical stirring for mud in the pond keeps the suspended state to increase the average area of contact of microorganism, improved stirring efficiency simultaneously, reduces the working costs.

Wherein, the air outlet pipe of the blower 13 is connected with the water outlet pipe of the membrane component 14 in one path, the electromagnetic valve 20 which is automatically opened and closed is arranged on the pipeline to control the water outlet direction, the air outlet pipe is connected with the aeration devices 10 at the bottom of the aerobic tank 3 and the membrane tank 4 in another path, and the aeration pump can also be automatically controlled.

Wherein, the walls of the anaerobic tank 1, the anoxic tank 2, the aerobic tank 3 and the membrane tank 4 are all made of heat insulation materials, and a water heater is arranged in each tank to supplement heat loss, so that the operation temperature of the aquaculture wastewater treatment device is kept at 30-35 ℃.

The culture wastewater treatment device in the embodiment can also be additionally provided with a plurality of groups of anoxic tanks 2 and aerobic tanks 3.

The working principle of the utility model is as follows:

the culture wastewater enters the treatment device through the water inlet pipe 6, firstly, anaerobic fermentation and phosphorus-accumulating bacteria anaerobic phosphorus release reaction are carried out in the anaerobic tank 1, the anaerobic fermentation is heat release reaction and provides heat for the whole device, and the effluent of the anaerobic tank 1 enters the anoxic tank 2 through a communication port on the partition plate 5;

secondly, after the wastewater enters the anoxic tank 2, nitrate and nitrite in the wastewater are converted into nitrogen gas to be removed under the action of denitrifying bacteria, the top parts of the anaerobic tank 1 and the anoxic tank 2 are provided with biogas collecting pipes 7, and the collected biogas enters a biogas storage tank 8 for storage; because the reaction continuously generates methane and nitrogen, the air pressure above the liquid level of the anaerobic tank 1 and the anoxic tank 2 gradually rises, and the liquid level simultaneously falls, because the liquid level in the aerobic tank 3 is communicated with the outside air, under the action of the pressure difference in the anaerobic tank 2, the liquid level in the aerobic tank 3 rises, the nitrified liquid enters the nitrified liquid return pipe 11, and simultaneously flows back into the anoxic tank 2 through a water outlet hole arranged at the bottom of the nitrified liquid return pipe 11, so that the reflux ratio of the nitrified liquid is increased, the denitrification effect is enhanced, the high-efficiency removal of TN is ensured, meanwhile, a part of collected methane is pumped to the aeration devices 10 at the bottoms of the anaerobic tank 1 and the anoxic tank by adopting a circulating pump 9, the sludge in the tanks is kept in a suspension state, and the average contact area of microorganisms is increased; meanwhile, suspended fillers 16 are arranged in the anaerobic tank 1 and the anoxic tank 2, so that the microbial biomass in the tanks can be effectively maintained, and the removal effect is enhanced;

then, the effluent of the anoxic tank 2 enters the aerobic tank 3 through a water outlet hole, the wastewater treatment temperature is maintained at 30-35 ℃, meanwhile, the dissolved oxygen content in the aerobic tank 3 is maintained at 1mg/l, the nitrification reaction in the aerobic tank 3 is gradually changed into short-range nitrification reaction to generate nitrite nitrogen, the nitrite nitrogen flows back into the anoxic tank 2 along with the nitrified liquid, and the nitrite nitrogen is converted into nitrogen through denitrification, so that the TN content in the wastewater is reduced; meanwhile, the phosphorus accumulating bacteria in the aerobic pool 3 re-accumulate phosphorus under aerobic conditions, the TP content in the water body is reduced, and in order to further increase the microbial biomass, a suspended filler 17 is arranged in the aerobic pool 3 to be used as a habitat of microorganisms;

finally, effluent from the aerobic tank 3 enters a membrane tank 4, a membrane module 14 is arranged in the membrane tank 4, and the effluent is filtered by the membrane module 14 under the suction action of an effluent water pump 15 and then is discharged out of the device; due to the high-efficiency interception function of the membrane component 14, nitrosobacteria and denitrifying bacteria growing in the system can be enriched into dominant bacteria, the short-cut nitrification function is enhanced, and simultaneously, clear effluent and good water quality are ensured; in order to relieve membrane pollution, powdered activated carbon filler is added into the membrane tank 4, the property of sludge on the surface of the membrane component 14 is improved, meanwhile, an air outlet pipe of the air blower 13 can be connected to the membrane component 14 by starting and stopping the electromagnetic valve 20, and the membrane component 14 is subjected to online gas backwashing; the bottom parts of the aerobic tank 3 and the membrane tank 4 are provided with aeration devices 10 for providing a certain amount of aeration;

wherein, part of sludge in the membrane tank 4 is returned to the anaerobic tank 1 through the sludge return pump 18, a certain sludge concentration in the anaerobic tank 1 is maintained, and meanwhile, part of sludge needs to be discharged out of the system for dephosphorization to keep the biological activity; the water heater can be adopted in each tank of the treatment device for heat compensation, and the tank wall at the outer side is made of heat insulation materials, so that the temperature of wastewater treatment is kept at 30-35 ℃.

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 construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a breed effluent treatment plant which characterized in that: comprises an anaerobic tank (1), an anoxic tank (2), an aerobic tank (3) and a membrane tank (4) which are separated by a partition plate (5) and are communicated in sequence; the top parts of the anaerobic tank (1) and the anoxic tank (2) are provided with a biogas collecting pipe (7) which is connected to a biogas collecting tank (8); the side wall of the bottom of the anaerobic tank (1) is also provided with a water inlet pipe (6) communicated with the external water body; a nitrifying liquid return pipe (11) is arranged at the top of the anoxic tank (2), the center of a water inlet end pipe of the nitrifying liquid return pipe (11) is as high as the liquid level of the aerobic tank (3), and a through hole is formed in the bottom of a water outlet end and is arranged at the top of the anoxic tank (2); a membrane component (14) is arranged in the membrane tank (4), the membrane component (14) is connected with a water outlet pump (15) through a pipeline, the bottom of the membrane tank (4) is externally connected with a sludge reflux pump (18), and sludge in the membrane tank (4) is pumped to a sludge reflux port arranged at the bottom of the anaerobic tank (1) or directly discharged; aeration devices (10) are arranged at the bottoms of the anaerobic tank (1), the anoxic tank (2), the aerobic tank (3) and the membrane tank (4), and the anaerobic tank (1) and the anoxic tank (2) share the recovered biogas for cyclic aeration; the aeration devices (10) of the aerobic tank (3) and the membrane tank (4) are communicated with each other and then externally connected with a blower for air aeration.

2. The aquaculture wastewater treatment apparatus of claim 1, wherein: suspended fillers are arranged in the anaerobic tank (1) and the anoxic tank (2), light porous fillers are arranged in the aerobic tank (3), and powdered activated carbon fillers or suspended fillers are arranged in the membrane tank (4).

3. The aquaculture wastewater treatment apparatus of claim 2, wherein: be provided with the intercommunication mouth that can communicate adjacent reaction tank on baffle (5), set up the graticule mesh on the intercommunication mouth, prevent that each pond internal packing from running off.

4. The aquaculture wastewater treatment apparatus of claim 3, wherein: one path of air outlet pipe of the methane collecting tank (8) is used for the outside, and the other path of air outlet pipe is connected to an aeration device (10) at the bottom of the anaerobic tank (1) and the anoxic tank (2) through a circulating pump (9).

5. The aquaculture wastewater treatment apparatus of claim 4, wherein: the air outlet pipe of the air blower (13) is connected to the water outlet pipe of the membrane component (14) in one way, the pipeline is provided with an electromagnetic valve (20) which can be automatically opened and closed to control the water outlet direction, and the air outlet pipe is connected to the aeration devices (10) at the bottoms of the aerobic tank (3) and the membrane tank (4) in one way.

6. The aquaculture wastewater treatment apparatus of claim 5, wherein: the sludge return pump (18) is respectively communicated with a drain pipe (19) and a sludge return pipe (12), partial sludge is discharged outwards through the drain pipe (19), and partial sludge is returned to the anaerobic tank (1) through the sludge return pipe (12); electromagnetic valves (20) are arranged on the drain pipe (19) and the sludge return pipe (12) to automatically control the sludge direction.

7. The aquaculture wastewater treatment apparatus of claim 6, wherein: the tank walls of the anaerobic tank (1), the anoxic tank (2), the aerobic tank (3) and the membrane tank are all made of heat-insulating materials, and a water heater is arranged in each tank to supplement heat loss.

8. The aquaculture wastewater treatment apparatus of claim 7, wherein: the culture wastewater treatment device can be additionally provided with a combination of an anoxic pond (2) and an aerobic pond (3), and at least one group of the anoxic pond (2) and the aerobic pond (3) is provided.