Cultivation tail water circulation treatment system
By designing an aquaculture wastewater recycling system that includes pretreatment filtration, biological purification, and disinfection, the problem of eutrophication caused by nitrogen, phosphorus, and other elements in aquaculture wastewater was solved, achieving effective water purification and recycling.
Patent Information
- Application Number
- CN202520101447.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-16
AI Technical Summary
In existing recirculating aquaculture systems, the wastewater contains abundant nitrogen, phosphorus, potassium, and other elements, leading to eutrophication and pollution of the water. Untreated organic matter decomposes to produce harmful substances such as ammonia nitrogen and sulfides, which affect the aquaculture environment.
A simple aquaculture wastewater recycling system is designed, comprising a pretreatment filtration component, a biological purification reaction component, and a disinfection and reuse component. The system purifies the wastewater through multi-stage filtration, biological purification reaction, and disinfection, removing pollutants such as suspended solids, nitrogen, and phosphorus, and enabling recycling.
It effectively removes suspended solids, nitrogen, phosphorus and other pollutants from aquaculture wastewater, improves water quality, reduces pollutant emissions, achieves recycling, and protects the aquaculture environment.
Smart Images
Figure CN223879580U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model is applied to the technical field of breeding tail water treatment, and particularly relates to a breeding tail water circulation treatment system. BACKGROUND
[0002] In aquaculture, the factory circulating water breeding mode is widely used due to high breeding density, land area saving, water saving, and good economic benefits.
[0003] In the factory circulating water breeding, the main sources of breeding tail water are breeding feed, drugs for preventing and treating diseases, excrement and other wastes generated in the growth process of breeding organisms, etc., which contain rich elements such as nitrogen, phosphorus, and potassium, and the discharge of these substances into the water body will cause eutrophication of the water body. The specific mechanism is that the wastewater containing rich nutrients is discharged into the water body, causing the rapid increase of algae and microorganisms in the water, greatly increasing the oxygen consumption, and affecting the survival of fish and shrimp organisms, even causing a large number of deaths, and destroying the ecological environment.
[0004] The bait, fish excrement, and dead organisms input during the breeding process make the content of organic matter and suspended solids (SS) in the tail water high. If these organic matters cannot be effectively treated, they will decompose to produce harmful substances such as ammonia nitrogen and sulfides, causing pollution to the breeding environment; the content of nutrients such as nitrogen and phosphorus in the breeding tail water is high. This is because during the breeding process, in order to promote the growth of breeding organisms, excessive bait is often fed, resulting in part of the bait remaining in the water and being decomposed into nutrients such as nitrogen and phosphorus. If these nutrients accumulate too much, they are easy to cause eutrophication of the water body, causing problems such as massive reproduction of algae. If a breeding tail water circulation treatment system with simple structure, which couples multi-stage filtration, biological purification reaction, and disinfection system to purify and treat the breeding tail water, improve water quality, reduce pollutant emissions, and realize recycling, can be designed, the above problems can be solved. UTILITY MODEL CONTENTS
[0005] The utility model solves the technical problems of overcoming the deficiencies of the prior art, and provides a breeding tail water circulation treatment system with simple structure, which couples multi-stage filtration, biological purification reaction, and disinfection system to purify and treat the breeding tail water, improve water quality, reduce pollutant emissions, and realize recycling.
[0006] The utility model discloses a technical scheme which is: the utility model discloses a pretreatment filtering assembly, biological purification reaction assembly and disinfection and reuse assembly, the pretreatment filtering assembly includes filter, sedimentation tank and coagulation air flotation machine, the filter is cooperated with the external breeding tail water pool through the lift pump, the biological purification reaction assembly includes biological reactor and purification pool, the coagulation air flotation machine is cooperated with the biological reactor, the feed-in end and the discharge end of the sedimentation tank are cooperated with the filter and the coagulation air flotation machine respectively, the disinfection and reuse assembly includes disinfection pool, the biological reactor is cooperated with the external reuse mechanism through the purification pool and the disinfection pool.
[0007] Further, the sedimentation tank is provided with an inlet at the upper end, a water outlet is arranged outside the middle part of the sedimentation tank, a vertical flow filter pipe is arranged inside the sedimentation tank, the vertical flow filter pipe is connected with the discharge end of the filter through the inlet, and the water outlet is cooperated with the feed-in end of the coagulation air flotation machine.
[0008] Further, the sedimentation tank is provided with a discharge port at the lower end, and the discharge port is connected with an external waste collecting device.
[0009] Further, the coagulation air flotation machine includes a water purification agent module, a coagulation module and an air flotation module, the tail water at the water outlet of the sedimentation tank is cooperated with the water purification agent module, the coagulation module and the air flotation module respectively, and the water outlet of the coagulation air flotation machine is connected with the water inlet end of the biological reactor.
[0010] Further, a blower module is arranged at the bottom side inside the biological reactor, a membrane biological reaction module is arranged in the middle part of the biological reactor, the membrane biological reaction module is cooperated with the tail water at the water outlet of the coagulation air flotation machine, the blower module is cooperated with the reaction end of the membrane biological reaction module, and a reactor blow-off pipe is arranged at one side of the bottom of the biological reactor.
[0011] Further, the purification pool is provided with a plant purification module, and the plant purification module is cooperated with the tail water at the water outlet of the biological reactor.
[0012] Further, the disinfection pool is provided with an ozone disinfection module, and the ozone disinfection module is cooperated with the tail water at the water outlet of the purification pool.
[0013] Further, a reuse pool is connected with the water outlet of the disinfection pool, and the reuse pool is cooperated with an external circulation system through a reuse pump.
[0014] The utility model discloses beneficial effect is: through filter and the sedimentation tank can effectively remove a large number of bait, excrement and biological body residue etc., the sludge that the sedimentation tank bottom deposits is handled or carries out agricultural reuse, and the aquaculture tail water after the sedimentation tank primary treatment is removed to the suspended solid effectively through coagulation air floatator, satisfies the water requirement of subsequent MBR membrane bioreactor processing unit, finally through the purification pond with the disinfection pond cooperation carries out effective treatment and completes the purification of aquaculture tail water to the circulation water, simple structure, effect is better. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the structure view of the utility model;
[0016] Figure 2 It is the structure schematic view of the sedimentation tank;
[0017] Figure 3 It is the structure schematic view of the coagulation air floatator;
[0018] Figure 4 It is the structure schematic view of the bioreactor;
[0019] Figure 5 It is the structure schematic view of the purification pond with the disinfection pond cooperation. DETAILED DESCRIPTION
[0020] As Figures 1 to 5 Shown, in the embodiment, the utility model discloses a pretreatment filter assembly 1, biological purification reaction assembly 2 and disinfection reuse assembly 3, and its characterized in that: pretreatment filter assembly 1 includes filter 4, sedimentation tank 5 and coagulation air floatator 6, filter 4 is cooperated with external aquaculture tail water pond through the lift pump 7, biological purification reaction assembly 2 includes bioreactor 8 and purification pond 9, coagulation air floatator 6 and bioreactor 8 cooperate, the feed end and the discharge end of sedimentation tank 5 are cooperated with filter 4 and coagulation air floatator 6 respectively, disinfection reuse assembly 3 includes disinfection pond 10, bioreactor 8 is cooperated with external reuse mechanism through purification pond 9 and disinfection pond 10. Therefore, through filter 4 and sedimentation tank 5 can effectively remove a large number of bait, excrement and biological body residue etc., the sludge that the bottom of sedimentation tank 5 deposits is handled or carries out agricultural reuse, the aquaculture tail water after the primary treatment of sedimentation tank 5 is removed to the suspended solid effectively through coagulation air floatator 6, satisfies the water requirement of subsequent MBR membrane bioreactor processing unit, finally through the purification pond 9 with the disinfection pond 10 cooperation carries out effective treatment and completes the purification of aquaculture tail water, and realizes the circulation water, simple structure, effect is better.
[0021] As Figure 2As shown, in this embodiment, the sedimentation tank 5 has an inlet 11 at its upper end and an outlet 12 on its outer side in the middle. A vertical flow filter pipe 13 is installed inside the sedimentation tank 5. The vertical flow filter pipe 13 is connected to the outlet end of the filter 4 through the inlet 11, and the outlet 12 is connected to the inlet end of the coagulation flotation machine 6. Therefore, the aquaculture wastewater produced by the factory contains a large amount of feed, excrement, and biological residue, and needs to be filtered through the vertical flow filter pipe to flow into the sedimentation tank 5 for solid-liquid separation, with the liquid flowing out through the outlet 12.
[0022] like Figure 2 As shown, in this embodiment, a discharge port 14 is provided at the lower end of the sedimentation tank 5, and the discharge port 14 is connected to an external waste collection device. Therefore, the vertical flow filter pipe 13, in the form of a vertical flow sedimentation tank, can effectively remove sludge initially. The sludge settled at the bottom of the sedimentation tank 5 is discharged for treatment or reused in agriculture.
[0023] like Figure 3 As shown, in this embodiment, the coagulation-flotation machine 6 includes a water purification agent module 15, a coagulation module 16, and a flotation module 17. The effluent from the sedimentation tank 5 is connected to the water purification agent module 15, the coagulation module 16, and the flotation module 17, respectively. The effluent from the coagulation-flotation machine 6 is connected to the influent from the bioreactor 8. Therefore, adding coagulants, such as polyaluminum chloride (PAC), polyacrylamide (PAM), or other water purification agents, to the effluent causes suspended particles and organic matter in the water to coagulate into larger flocs. The effluent after adding the agents enters the flotation tank, where the flotation machine generates a large number of microbubbles by injecting air or dissolved air into the water. These bubbles encounter the flocs during their ascent and adhere to them, forming scum. Due to the buoyancy of the bubbles, the scum quickly rises to the surface, forming a scum layer. When the flotation layer reaches a certain thickness, the scum is scraped away by a scum scraper or similar equipment and further processed, such as composting or transported to a landfill. The clean water after flotation treatment flows out from the bottom or side of the flotation machine. Part of it can be recycled as dissolved air water to improve flotation efficiency; the remainder can be discharged to the subsequent MBR membrane bioreactor treatment unit.
[0024] like Figure 4As shown, in this embodiment, a blower module 18 is installed on the bottom side of the bioreactor 8, and a membrane bioreactor module 19 is installed in the middle of the bioreactor 8. The membrane bioreactor module 19 is connected to the effluent from the outlet of the coagulation and flotation machine 6, and the blower module 18 is connected to the reaction end of the bioreactor 8. A reactor discharge pipe 20 is installed on one side of the bottom of the membrane bioreactor module 19. Thus, by combining biological treatment technology and membrane separation technology, solid-liquid separation is achieved by using membrane modules to trap activated sludge and macromolecular organic matter in the bioreactor. The biological treatment section is responsible for degrading organic matter and converting pollutants such as ammonia nitrogen, while the membrane separation section is responsible for separating the treated water from the sludge, ensuring the quality of the effluent. The MBR system can efficiently trap suspended solids, bacteria, viruses, and other small particles in wastewater, ensuring clear and transparent effluent. The MBR system eliminates the need for a secondary sedimentation tank in traditional treatment technologies and can maintain a high concentration of activated sludge, thus requiring a relatively small footprint.
[0025] like Figure 5 As shown, in this embodiment, the purification tank 9 is equipped with a plant purification module 21, which works in conjunction with the effluent from the bioreactor 8. Therefore, the aquaculture effluent enters the purification tank after being treated by the MBR treatment system. The plant purification module 21 is a method of purifying water quality using the microbial environment of plants and their roots. This method is not only environmentally friendly but also effectively removes pollutants from the effluent, improving water quality.
[0026] like Figure 5 As shown, in this embodiment, the disinfection tank 10 is equipped with an ozone disinfection module 22, which works in conjunction with the effluent from the purification tank 9. Therefore, the strong oxidizing properties of ozone are utilized to oxidize and decompose organic matter in the aquaculture effluent. Ozone can destroy the molecular structure of organic matter, breaking it down into smaller molecules, or even directly oxidizing it into carbon dioxide and water, thereby achieving water purification. Simultaneously, ozone can also kill bacteria, viruses, and other microorganisms in the water, improving the safety of the effluent.
[0027] like Figure 1 As shown, in this embodiment, the outlet of the disinfection tank 10 is connected to a reuse tank 23, which is connected to an external circulation system via a reuse pump 24. Therefore, the effluent from ozone disinfection meets the standard for recycling; after settling in the reuse tank, it is recycled via the reuse pump.
[0028] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious.
Claims
1. A farming tail water circulation treatment system, comprising a pretreatment filtering assembly (1), a biological purification reaction assembly (2) and a disinfection and reuse assembly (3), characterized in that: The pre-treatment filtering assembly (1) comprises a filter (4), a sedimentation tank (5) and a coagulation air flotation machine (6), the filter (4) is matched with an external aquaculture tail water pool through a lifting pump (7), the biological purification reaction assembly (2) comprises a biological reactor (8) and a purification tank (9), the coagulation air flotation machine (6) is matched with the biological reactor (8), the feeding end and the discharging end of the sedimentation tank (5) are matched with the filter (4) and the coagulation air flotation machine (6) respectively, and the disinfection and reuse assembly (3) comprises a disinfection tank (10).
2. The recirculating system for treating aquaculture tailwater of claim 1, wherein: The sedimentation tank (5) is provided with a feeding port (11) at the upper end, is provided with a water outlet (12) at the outer side of the middle part, and is provided with a vertical flow filter pipe (13) in the inside, the vertical flow filter pipe (13) is connected with the discharging end of the filter (4) through the feeding port (11), and the water outlet (12) is matched with the feeding end of the coagulation air flotation machine (6).
3. The recirculating system for aquaculture effluent treatment of claim 2, wherein: The sedimentation tank (5) is provided with a discharging port (14) at the lower end, and the discharging port (14) is connected with an external waste collecting device.
4. The recirculating aquaculture effluent treatment system of claim 1, wherein: The coagulation air flotation machine (6) comprises a water purification agent module (15), a coagulation module (16) and an air flotation module (17), tail water at the water outlet end of the sedimentation tank (5) is matched with the water purification agent module (15), the coagulation module (16) and the air flotation module (17) respectively, and the water outlet end of the coagulation air flotation machine (6) is connected with the water inlet end of the biological reactor (8).
5. The recirculating aquaculture effluent treatment system of claim 1, wherein: The biological reactor (8) is provided with a blower module (18) at the bottom side in the inside, is provided with a membrane biological reaction module (19) at the middle part, the membrane biological reaction module (19) is matched with tail water at the water outlet end of the coagulation air flotation machine (6), the blower module (18) is matched with the reaction end of the membrane biological reaction module (19), and the biological reactor (8) is provided with a reactor blow-off pipe (20) at one side of the bottom.
6. The recirculating aquaculture effluent treatment system of claim 1, wherein: The purification tank (9) is provided with a plant purification module (21), and the plant purification module (21) is matched with tail water at the water outlet end of the biological reactor (8).
7. The recirculating aquaculture effluent treatment system of claim 1, wherein: The disinfection tank (10) is provided with an ozone disinfection module (22), and the ozone disinfection module (22) is matched with tail water at the water outlet end of the purification tank (9).
8. The recirculating aquaculture effluent treatment system of claim 1, wherein: The disinfection tank (10) is connected with a reuse tank (23), and the reuse tank (23) is matched with an external circulation system through a reuse pump (24).