CN211664906U - Aquaculture tail water treatment device based on suspended filler biomembrane technology - Google Patents
Aquaculture tail water treatment device based on suspended filler biomembrane technology Download PDFInfo
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model discloses an aquaculture tail water processing apparatus based on suspension filler biomembrane technique, including the reactor main part, set gradually according to the sewage treatment flow in the reactor main part and be arranged in reducing the denitrification system of total nitrogen volume in the waste water, be arranged in getting rid of the good oxygen biochemical system of organic matter in the waste water, be used for getting rid of the nitrification system of ammonia nitrogen in the waste water, the nitrification system carries the waste water of the completion of nitrifying system in through reflux unit and carries to the denitrification system and further handle, the utility model discloses endogenetic material concentration is high, and waste water dwell time is short, and area is little, easy operation, equipment need not the back flush, does not have the mud backward flow, maintains the demand and hangs down, and shock-resistant load operates steadily.
Description
Technical Field
The utility model relates to a sewage treatment plant, specific theory relates to an aquaculture tail water treatment facilities based on suspension filler biomembrane technique that high efficiency, environmental protection, treatment effect are good, belongs to sewage treatment technical field.
Background
Aquaculture is the important component of agricultural production, plays an important role in national economy, the intensive aquaculture industry of the mill that appears to land resource and water resource utilization ratio for nearly 20 years develops rapidly, and in the intensive aquaculture process of mill, the poisonous and harmful organic matters such as residual feed, plankton metabolite and the excrement of cultured animals in the aquaculture water body can accumulate in a large number, can cause the water deterioration when organic matter content in the water body is too high, lead to slow growth of fish or even death or pan-pond, influence the aquatic product quality.
In view of the above, it is necessary to regularly discharge tail water containing toxic and harmful substances during intensive aquaculture in a factory to ensure healthy growth of cultured objects such as fish, shrimp, and shellfish, and to regularly discharge tail water containing toxic and harmful substances during intensive aquaculture in a factory to ensure healthy growth of cultured objects such as fish, shrimp, and shellfish, but in the current aquaculture mode, the tail water is usually discharged without treatment or simple treatment, and ammonia nitrogen compounds, nitrites, soluble organic substances, Suspended Solids (SS), and pathogens generated by decomposition of nitrogen-containing organic substances such as excrement, residual baits, feces, animal and plant carcasses of aquatic animals in the cultured tail water easily cause eutrophication of surrounding water bodies, and destroy the natural environment.
In order to solve the problems, the treatment technology for the culture tail water at home and abroad at present mainly comprises a physical treatment technology, a physical and chemical treatment technology and a biological treatment technology; the material treatment technology mainly comprises adsorption and filtration, wherein the adsorption mainly utilizes filter materials with different apertures to adsorb impurities in tail water so as to keep the water quality clean, and the filtration mainly intercepts and removes large-particle organic matters and residual bait excrement in the tail water so as to keep the water quality clean; the treatment means such as adsorption and filtration can remove 80% of pollutants such as metabolites in aquaculture tail water, but the removal effect on organic matters with fine particles and soluble organic matters is very poor, and meanwhile, the physical treatment technology has the problems of poor treatment effect and incomplete water body purification, so that the effluent is easily overproof.
The chemical treatment technology is mainly a water flow disinfection method, and mainly aims at killing pathogenic microorganisms in water. At present, ozone disinfection is mainly used, and can effectively oxidize ammonia nitrogen and various reductive pollutants accumulated in tail water by ozone, reduce COD concentration, purify water and optimize aquaculture environment. However, when killing pathogenic microorganisms in the tail water, ozone and beneficial bacteria are killed together, so that the treatment effect is reduced, and the ozone disinfection treatment also has the defects of low ozone utilization rate, insufficient oxidation capacity, high one-time investment cost and high operation cost, so that the application of the ozone in the treatment of the aquaculture tail water is limited.
The artificial wetland is a sewage purification comprehensive system artificially designed and built according to the requirements of people by selecting a certain geographical position and a certain terrain and simulating the structure and the function of a natural wetland, has the advantages of low operating cost, simple and convenient maintenance, impact load resistance and the like, but is easily interfered by natural and artificial activities and easily blocked to cause ecological balance to be damaged, and has the defects of large occupied area, low technical content, difficult standard discharge, easy secondary pollution and the like.
The technology of adding the efficient microbial agent is to add the efficient microbial agent into the culture tail water to increase biomass and strengthen the removal capacity of a biological treatment system to target pollutants.
The microbial immobilization technology is a new biological technology developed in the 60 th of the 20 th century, and the technology locates free microbial cells or enzymes in a limited space area by physical or chemical measures and enables the free microbial cells or enzymes to keep activity so as to be repeatedly utilized, has the advantages of high efficiency, strong stability, easy reaction control, strong environmental tolerance, high efficiency of keeping strains and the like, and the currently frequently adopted biological immobilization methods mainly comprise an adsorption method, an embedding method, a cross-linking method and a covalent bonding method. However, the technology is mainly in the experimental research stage at present, and there are many problems in practical application, such as the research on the purification mechanism of immobilized microorganisms, the preservation thereof, the mass production, etc. is not yet completed.
Therefore, the method for treating the aquaculture tail water has the advantages of high efficiency, environmental protection and good treatment effect, and has important practical significance for the healthy and sustainable development of aquaculture in China.
SUMMERY OF THE UTILITY MODEL
The to-be-solved main technical problem of the utility model is to provide a handle aquaculture tail water, guarantee that the play water is discharge to reach standard, realize the zero release of tail water even, realize the cyclic utilization of water resource, reduce the tail water and discharge the pollution to the surrounding environment, practiced thrift the water resource, have fine environmental benefit and economic benefits's aquaculture tail water processing apparatus based on suspension filler biomembrane technique.
In order to solve the technical problem, the utility model provides a following technical scheme:
an aquaculture tail water treatment device based on a suspended filler biomembrane technology comprises a reactor main body, wherein a denitrification system for reducing the total nitrogen content in wastewater, an aerobic biochemical system for removing organic matters in the wastewater and a nitrification system for removing ammonia nitrogen in the wastewater are sequentially arranged in the reactor main body according to a sewage treatment flow, and the nitrification system conveys the wastewater treated in the nitrification system to the denitrification system for further treatment through a reflux device.
The following is the utility model discloses to above-mentioned technical scheme's further optimization:
the denitrification system comprises a preposed denitrification tank, denitrification fillers are filled in the preposed denitrification tank, and a stirring and flushing device which is used for stirring wastewater, the denitrification fillers and capable of flushing suspended matters accumulated on the surfaces of the fillers and aged biological films is arranged in the preposed denitrification tank.
Further optimization: the denitrification filler comprises a suspended filler filled in the preposed denitrification tank and denitrification bacteria attached to the suspended filler.
Further optimization: and a bottom water distribution pipe is fixedly arranged at the bottom of the front denitrification tank, and the water inlet end of the bottom water distribution pipe is communicated with a water inlet valve arranged at the water inlet of the front denitrification tank through a pipeline.
Further optimization: the stirring and flushing device comprises a hyperboloid stirrer, wherein a stirring blade at the lower end of the hyperboloid stirrer is placed in the front-mounted denitrification tank, a forward flushing pipe is further arranged in the front-mounted denitrification tank, and the air inlet end of the forward flushing pipe is communicated with a fan arranged outside the front-mounted denitrification tank.
Further optimization: the aerobic biochemical system comprises an aerobic tank, the aerobic tank is communicated with the denitrification tank through a denitrification tank interception filler circulation device, and the aerobic tank is filled with aerobic filler and provided with an aeration component for aerating the aerobic tank.
Further optimization: the device for intercepting the filler circulation in the denitrification tank comprises a denitrification tank water outlet intercepting screen which is arranged in the denitrification tank and is close to the upper end, the water outlet end of the denitrification tank water outlet intercepting screen is communicated with an aerobic tank water inlet bottom water distribution pipe through a guide pipe, and the aerobic tank water inlet bottom water distribution pipe is arranged at the bottom of the aerobic tank.
Further optimization: the aerobic filler comprises suspended filler filled in the aerobic tank and aerobic microorganisms attached to the suspended filler.
Further optimization: the nitrification system comprises a nitrification tank, the nitrification tank is communicated with an aerobic tank through an aerobic tank interception filler circulation device, and nitrification fillers are filled in the nitrification tank.
Further optimization: the reflux device comprises a reflux pipeline arranged between the nitrification tank and the denitrification tank, a reflux pump is serially arranged on the reflux pipeline, the water inlet end of the reflux pipeline is communicated with a nitrification tank water outlet interception screen arranged in the nitrification tank, and the water outlet end of the reflux pipeline is communicated to the water inlet of a bottom water distribution pipe in the preposed denitrification tank.
The utility model adopts the above technical scheme, following beneficial effect has:
(1) the aquaculture tail water treatment device is high in biomass concentration, short in retention time and small in occupied area, the treatment device is used for treating wastewater, the biological concentration of the aeration tank is up to 10-15 g/L, the volume of the device is reduced by more than 60% compared with that of the traditional activated sludge under the same load condition, the volume of the device is reduced by 25% compared with that of an MBBR process, a secondary sedimentation tank is reduced, and the water outlet effect is obvious.
(2) The operation is simple, the equipment does not need back washing, does not have sludge backflow, the maintenance requirement is low, the aeration system and the screen in the tank have the automatic cleaning function, the back washing is not needed, and the operation is simple and convenient.
(3) The water-supply system has the advantages of impact load resistance, stable operation, strong load and temperature change tolerance capability, no sludge bulking problem and stable operation under the condition of inflow load change.
(4) The biofilm formation time is short, and the treatment effect is high, compares traditional activated sludge process, reduces biofilm formation time 80%, and treatment effeciency promotes more than 30%, can effectively get rid of COD, ammonia nitrogen, total nitrogen, suspended solid etc. in the waste water.
(5) The mass transfer effect is good, the oxygen utilization ratio is high, the operating cost is low, because the filler is in a fluidized state in the reactor, the transmission rate between oxygen and the biomembrane is greatly improved, and the oxygen transmission rate in the reactor is twice of that of an MBBR reactor, so that the oxygen utilization ratio is greatly improved, and the energy consumption and the cost of sewage treatment are reduced.
(6) The single-use investment is low, the configuration is flexible, the installation is convenient, the whole equipment is designed into a single stage or the whole processing system is designed into a module, and the modular design enables the equipment to be conveniently transported and installed on site. In addition, the series can be flexibly selected to be combined according to different water quality requirements of inlet and outlet water, and more fillers can be added in a certain range to improve the treatment capacity of the equipment.
The following further describes the present invention with reference to the drawings and examples.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the embodiment of the present invention.
In the figure: 1-a water inlet valve; 2-preposing a denitrification tank; 3-a water outlet intercepting screen of the denitrification tank; 4-forward flushing pipe; 5-a hyperboloid agitator; 6-water distribution pipe at the bottom; 7-an aerobic tank effluent interception screen; 8-an aerobic tank; 9-a water distribution pipe at the water inlet bottom of the aerobic tank; 10-an aeration pipe of the aerobic tank; 11-a nitrification tank effluent interception screen; 12-a nitrification tank; 13-a water distribution pipe at the bottom of the nitrification tank; 14-a nitrification tank aeration pipe; 15-water outlet pipeline; 16-a return line; 17-a reflux pump; 18-a fan; 19-reactor body.
Detailed Description
Example (b): as shown in figure 1, the aquaculture tail water treatment device based on the suspended filler biofilm technology comprises a reactor main body 19, wherein a denitrification system for reducing the total nitrogen content in sewage, an aerobic biochemical system for removing organic matters in the sewage and a nitrification system for removing ammonia nitrogen in the sewage are sequentially arranged in the reactor main body 19 according to a sewage treatment flow, and the nitrification system conveys the sewage treated in the nitrification system to the denitrification system for further treatment through a reflux device.
The denitrification system comprises a preposed denitrification tank 2, denitrification fillers are filled in the preposed denitrification tank 2, and a stirring and flushing device which is used for stirring sewage and the denitrification fillers and can flush suspended matters accumulated on the surface of the fillers and aged biological films is arranged in the preposed denitrification tank 2.
The denitrification filler comprises suspended filler filled in the preposed denitrification tank 2 and denitrification bacteria attached to the suspended filler.
The suspended filler is made of HDPE materials and is granular, and the suspended filler is provided with a honeycomb surface.
By the design, the surface area of the suspended filler is large, the porosity is high, and the attachment of microorganisms is facilitated, so that the concentration of the microorganisms in the preposed denitrification tank 2 can be obviously improved, and meanwhile, the suspended filler is made of HDPE (high-density polyethylene) materials, so that the suspended filler has high hardness and is not easy to damage in the sewage treatment process.
The bottom of the preposed denitrification tank 2 is fixedly provided with a bottom water distribution pipe 6, and the water inlet end of the bottom water distribution pipe 6 is communicated with a water inlet valve 1 arranged at the water inlet of the preposed denitrification tank 2 through a pipeline.
A plurality of openings are uniformly formed in the bottom water distribution pipe 6 at annular intervals, so that uniform water distribution can be realized, the flow velocity of water flow can be controlled, the influence of high impact load caused by overhigh flow velocity of sewage on the content of denitrifying bacteria in the preposed denitrification tank 2 is prevented, and the sewage treatment effect is ensured.
The stirring and flushing device comprises a hyperboloid stirrer 5, the hyperboloid stirrer 5 is driven by a power driving device, and stirring blades at the lower end of the hyperboloid stirrer 5 are placed in the front denitrification tank 2 and used for stirring sewage in the front denitrification tank 2 to ensure that denitrifying bacteria attached to the filler are fully contacted with the sewage.
Design like this, adopt hyperboloid agitator 5 to be arranged in stirring leading denitrification pond 2 sewage and suspension filler, can make sewage can fully contact the denitrifying bacteria who adheres to on the filler, and then discharge the purpose that reaches reduction aquatic TN (total nitrogen content) in atmosphere through denitrifying bacteria with nitrate nitrogen conversion in the sewage to hyperboloid agitator 5's stirring vane is the design of hyperboloid and makes agitator 5 can not smash the filler in the operation process.
The advanced denitrification tank 2 is also internally provided with a forward flushing pipe 4, the forward flushing pipe 4 is provided with a plurality of holes at annular intervals, and the air inlet end of the forward flushing pipe 4 is communicated with a fan 18 arranged outside the advanced denitrification tank 2 through an air duct.
By the design, a large amount of suspended matters accumulated after the system runs for a period of time can be positively washed.
When the device is washed, all the fillers in the preposed denitrification tank 2 are in a fluidized state, and suspended matters accumulated on the surface of the suspended fillers and aged biological membranes fall off along with the washing and discharging system under the mutual collision action of water flow and the suspended fillers, and meanwhile, the biological membranes are updated.
The aerobic biochemical system comprises an aerobic tank 8, the aerobic tank 8 is communicated with the preposed denitrification tank 2 through a denitrification tank interception filler circulation device, and the aerobic tank 8 is filled with aerobic filler and provided with an aeration component for aerating the aerobic tank 8.
The device for intercepting the flow of the filler in the denitrification tank comprises a denitrification tank water outlet intercepting screen 3 which is arranged in a front denitrification tank 2 and is close to the upper end, the water outlet end of the denitrification tank water outlet intercepting screen 3 is communicated with an aerobic tank water inlet bottom water distribution pipe 9 through a guide pipe, and the aerobic tank water inlet bottom water distribution pipe 9 is arranged at the bottom of an aerobic tank 8.
The denitrification tank water outlet intercepting screen 3 is used for intercepting suspended fillers in the front denitrification tank 2 to avoid filler loss, and then only sewage treated in the front denitrification tank 2 enters the water distribution pipe 9 at the water inlet bottom of the aerobic tank through the denitrification tank water outlet intercepting screen 3 and the flow guide pipe, so that the treated sewage in the front denitrification tank 2 is conveyed into the aerobic tank 8.
A plurality of openings are uniformly formed in the water inlet bottom water distribution pipe 9 of the aerobic tank at annular intervals, so that uniform water distribution can be realized, the flow velocity of water flow can be controlled, the influence of high impact load caused by overhigh flow velocity of sewage on the content of aerobic microorganisms in the aerobic tank 8 is prevented, and the sewage treatment effect is ensured.
The aerobic filler comprises suspended filler filled in the aerobic tank 8 and aerobic microorganisms attached to the suspended filler.
The suspended filler is made of HDPE materials and is granular, and the suspended filler is provided with a honeycomb surface.
By the design, the surface area of the suspended filler is large, the porosity is high, and the attachment of aerobic microorganisms is facilitated, so that the concentration of the aerobic microorganisms in the aerobic pool 8 can be obviously improved, and meanwhile, the suspended filler is made of HDPE (high-density polyethylene) materials, so that the suspended filler has high hardness and is not easy to damage in the sewage treatment process.
The aeration component comprises an aerobic tank aeration pipe 10 arranged at the bottom of the aerobic tank 8, and the air inlet end of the aerobic tank aeration pipe 10 is communicated with a fan 18 through an air guide pipe.
A plurality of air outlet holes are uniformly formed in the aeration pipe 10 of the aerobic tank at annular intervals, the air flow output by the fan 18 is conveyed into the aeration pipe 10 of the aerobic tank through an air guide pipe, and the air flow is conveyed into the aerobic tank 8 through the air outlet holes formed in the aeration pipe 10 of the aerobic tank to realize bottom aeration in the aerobic tank 8.
Design like this, can reduce aeration resistance loss, solved traditional aeration pipeline's jam problem, change traditional aeration mode into linear aeration simultaneously for the aeration is more even, and the vertical circulation of formation makes the stirring mix more even, promotes oxygen utilization ratio and power efficiency.
The air flow output by the fan 18 is used for aerating the aerobic tank 8 through the flow guide pipe and the aerobic tank aeration pipe 10 to provide oxygen for aerobic microorganisms, so that the aerobic microorganisms decompose organic matters in the sewage in an aerobic environment and reduce the COD content in the sewage.
The nitrification system comprises a nitrification tank 12, the nitrification tank 12 is communicated with an aerobic tank 8 through an aerobic tank intercepting filler circulation device, and the nitrification tank 12 is filled with nitrification filler.
The aerobic tank interception filler circulation device comprises an aerobic tank water outlet interception screen 7 which is arranged in an aerobic tank 8 and is close to the upper part, the water outlet end of the aerobic tank water outlet interception screen 7 is communicated with a nitrification tank bottom water distribution pipe 13 through a guide pipe, and the nitrification tank bottom water distribution pipe 13 is arranged at the bottom of a nitrification tank 12.
The aerobic tank effluent intercepting screen 7 is used for intercepting suspended fillers in the aerobic tank 8 to avoid filler loss, so that only the treated sewage in the aerobic tank 8 enters the water distribution pipe 13 at the bottom of the nitrification tank through the aerobic tank effluent intercepting screen 7 and the flow guide pipe, and the treated sewage in the aerobic tank 8 is conveyed into the nitrification tank 12.
A plurality of openings are uniformly formed in the water distribution pipe 13 at the bottom of the nitrification tank at annular intervals, so that uniform water distribution can be realized, the flow velocity of water flow can be controlled, the influence of high impact load caused by overhigh flow velocity of sewage on the content of denitrifying bacteria in the nitrification tank 12 is prevented, and the treatment effect of sewage is ensured.
The nitrifying filler comprises suspended filler filled in the nitrifying pond 12 and nitrifying bacteria attached to the suspended filler.
The suspended filler is made of HDPE materials and is granular, and the suspended filler is provided with a honeycomb surface.
The bottom of the nitrification tank 12 is provided with a nitrification tank aeration pipe 14, and the air inlet end of the nitrification tank aeration pipe 14 is communicated with a fan 18 through an air duct.
A plurality of air outlets are uniformly formed in the aeration pipe 14 of the nitrification tank at annular intervals, the air flow output by the fan 18 is conveyed into the aeration pipe 14 of the nitrification tank through an air guide pipe, and the air flow is conveyed into the nitrification tank 12 through the air outlets formed in the aeration pipe 14 of the nitrification tank to realize bottom aeration in the nitrification tank.
Design like this, can reduce aeration resistance loss, solved traditional aeration pipeline's jam problem, change traditional aeration mode into linear aeration simultaneously for the aeration is more even, and the vertical circulation of formation makes the stirring mix more even, promotes oxygen utilization ratio and power efficiency.
Reflux unit is including setting up the return line 16 between nitrify pond 12 and denitrification pond 2, the last series connection of return line 16 is provided with backwash pump 17, return line 16's the end intercommunication of intaking has nitrify pond play water interception screen cloth 11, nitrify pond play water interception screen cloth 11 and set up the position that is close to the top in nitrifying pond 12.
The water outlet end of the return pipeline 16 is communicated with the water inlet of the bottom water distribution pipe 6 in the preposed denitrification tank 2.
By the design, part of sewage which does not reach the standard in the nitrification tank 12 can flow back to the preposed denitrification tank 2, and organic matters, ammonia nitrogen and total nitrogen in the sewage are further removed.
A water outlet pipeline 15 is arranged at a position, close to the reflux pump 17, on the reflux pipeline 16, and the water outlet pipeline 15 is used for discharging sewage reaching the standard after treatment
By adopting the technical scheme, when the device is used, sewage to be treated enters the preposed denitrification tank 2 through the pipeline provided with the water inlet valve 1 by the lifting pump, the hyperboloid stirrer 5 is opened, and microorganisms attached to the filler are fully contacted with the sewage by stirring; further, nitrate nitrogen in the sewage is converted into nitrogen gas by denitrifying bacteria and discharged into the atmosphere, so that the aim of reducing TN (total nitrogen content) in the water is fulfilled.
After the preposed denitrification tank 2 operates for a period of time, the air inflow of the forward flushing pipe 4 and the working efficiency of the hyperboloid stirrer 5 are improved, a large amount of suspended matters accumulated in the preposed denitrification tank 2 are positively flushed, and simultaneously, the aged biological membrane is updated under the mutual collision action of water flow and filler.
The sewage treated by the preposed denitrification tank 2 is filtered by the denitrification tank water outlet interception screen 3 and enters the aerobic tank 8 through the water distribution pipe 9 at the water inlet bottom of the aerobic tank, and the vertical circulation formed in the aerobic tank 8 enables the filler and the sewage to be stirred and mixed more uniformly under the action of the airflow output by the fan 18 and the aeration pipe 10 of the aerobic tank, so that the biological membrane can be updated while the organic matters are fully decomposed.
The sewage treated by the aerobic tank 8 is filtered by the aerobic tank outlet intercepting screen 7 and enters the nitrification tank 12 through the water distribution pipe 13 at the bottom of the nitrification tank, the treated sewage reaching the standard is discharged through the water outlet pipeline 15, and the sewage which does not reach the standard is driven by the reflux pump 17 to flow back to the preposed denitrification tank 2 for further treatment.
The above technical scheme is adopted in the utility model, biomass concentration is high in the reactor, and dwell time is short, and area is little, adopts this processing apparatus to handle sewage, and aeration tank biological concentration is up to 10 ~ 15g/L, and equipment volume ratio tradition activated sludge reduces more than 60% under the same load condition, reduces 25% than MBBR technology to reduced two heavy ponds, the play water effect is obvious.
(2) The operation is simple, the equipment does not need back washing, does not have sludge backflow, the maintenance requirement is low, the aeration system and the screen in the tank have the automatic cleaning function, the back washing is not needed, and the operation is simple and convenient.
(3) The water-supply system has the advantages of impact load resistance, stable operation, strong load and temperature change tolerance capability, no sludge bulking problem and stable operation under the condition of inflow load change.
(4) The biofilm formation time is short, and the treatment effect is high, compares traditional activated sludge process, reduces biofilm formation time 80%, and treatment effeciency promotes more than 30%, can effectively remove COD, ammonia nitrogen, total nitrogen, suspended solid etc. in the sewage.
(5) The mass transfer effect is good, the oxygen utilization ratio is high, the operating cost is low, because the filler is in a fluidized state in the reactor, the transmission rate between oxygen and the biomembrane is greatly improved, and the oxygen transmission rate in the reactor is twice of that of an MBBR reactor, so that the oxygen utilization ratio is greatly improved, and the energy consumption and the cost of sewage treatment are reduced.
(3) The one-time investment is low, the configuration is flexible, the installation is convenient, the whole equipment can be designed into a single stage or the whole processing system is designed into a module, and the modular design enables the equipment to be conveniently transported and installed on site. In addition, the series can be flexibly selected to be combined according to different water quality requirements of inlet and outlet water, and more fillers can be added in a certain range to improve the treatment capacity of the equipment.
For those skilled in the art, based on the teachings of the present invention, changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.
Claims (7)
1. Aquaculture tail water treatment facilities based on suspension filler biomembrane technique, including reactor main part (19), its characterized in that: a denitrification system for reducing the total nitrogen content in the wastewater, an aerobic biochemical system for removing organic matters in the wastewater and a nitrification system for removing ammonia nitrogen in the wastewater are sequentially arranged in the reactor main body (19) according to a sewage treatment flow, and the nitrification system conveys the wastewater treated in the nitrification system to the denitrification system for further treatment through a reflux device;
the denitrification system comprises a preposed denitrification tank (2), denitrification fillers are filled in the preposed denitrification tank (2), and a stirring and flushing device for stirring wastewater, the denitrification fillers and suspended matters accumulated on the surfaces of the fillers and an aged biological film is arranged in the preposed denitrification tank (2);
the aerobic biochemical system comprises an aerobic tank (8), the aerobic tank (8) is communicated with the denitrification tank (2) through a denitrification tank interception filler circulation device, and aerobic fillers and an aeration component for aerating the aerobic tank (8) are filled in the aerobic tank (8); the nitrification system comprises a nitrification tank (12), the nitrification tank (12) is communicated with the aerobic tank (8) through an aerobic tank intercepting filler circulation device, and the nitrification tank (12) is filled with nitrified filler.
2. The aquaculture tail water treatment device based on the suspended filler biofilm technology of claim 1, wherein: the denitrification filler comprises suspended filler filled in the preposed denitrification tank (2) and denitrification bacteria attached to the suspended filler.
3. The aquaculture tail water treatment device based on the suspended filler biofilm technology of claim 2, wherein: the bottom of the preposed denitrification tank (2) is fixedly provided with a bottom water distribution pipe (6), and the water inlet end of the bottom water distribution pipe (6) is communicated with a water inlet valve (1) arranged at the water inlet of the preposed denitrification tank (2) through a pipeline.
4. The aquaculture tail water treatment device based on the suspended filler biofilm technology of claim 3, wherein: the stirring and flushing device comprises a hyperboloid stirrer (5), wherein a stirring blade at the lower end of the hyperboloid stirrer (5) is placed in the front denitrification tank (2), a forward flushing pipe (4) is further arranged in the front denitrification tank (2), and the air inlet end of the forward flushing pipe (4) is communicated with a fan (18) arranged outside the front denitrification tank (2).
5. The aquaculture tail water treatment device based on the suspended filler biofilm technology of claim 4, wherein: the device for intercepting the filler circulation in the denitrification tank comprises a denitrification tank water outlet intercepting screen (3) which is arranged in the denitrification tank (2) and is close to the upper end, the water outlet end of the denitrification tank water outlet intercepting screen (3) is communicated with an aerobic tank water inlet bottom water distribution pipe (9) through a guide pipe, and the aerobic tank water inlet bottom water distribution pipe (9) is arranged at the bottom of an aerobic tank (8).
6. The aquaculture tail water treatment device based on the suspended filler biofilm technology of claim 5, wherein: the aerobic filler comprises suspended filler filled in the aerobic tank (8) and aerobic microorganisms attached to the suspended filler.
7. The aquaculture tail water treatment device based on the suspended filler biofilm technology of claim 6, wherein: the reflux device comprises a reflux pipeline (16) arranged between the nitrification tank (12) and the denitrification tank (2), a reflux pump (17) is arranged on the reflux pipeline (16) in series, the water inlet end of the reflux pipeline (16) is communicated with a nitrification tank water outlet intercepting screen (11) arranged in the nitrification tank (12), and the water outlet end of the reflux pipeline (16) is communicated to the water inlet of a bottom water distribution pipe (6) in the preposed denitrification tank (2).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185063A (en) * | 2021-05-14 | 2021-07-30 | 西湖大学 | Anti-clogging artificial wetland system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113185063A (en) * | 2021-05-14 | 2021-07-30 | 西湖大学 | Anti-clogging artificial wetland system |
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