Farm reclaimed water reuse concentrated water treatment system
By introducing reverse osmosis membrane modules and deodorization, sedimentation, and evaporation devices into the farm, and combining them with wind power, solar energy, and biogas energy, the problem of high cost of concentrated wastewater treatment in the farm has been solved, achieving zero emissions and resource recycling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENS FOODSTUFF GROUP CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-05-19
AI Technical Summary
In existing technologies, the treatment of concentrated wastewater for reuse in aquaculture farms is costly and difficult. Traditional processes consume a large amount of electricity and are difficult to achieve efficient wastewater reduction and zero emissions, which limits the promotion of wastewater reuse technology.
The system employs reverse osmosis membrane modules combined with concentrated water collection, deodorization, sedimentation, and evaporation devices. It utilizes wind power from end-of-pipe fans, solar energy, and biogas energy to power the evaporation devices, achieving zero discharge of concentrated water and resource recycling.
It achieves zero discharge of concentrated wastewater from the aquaculture farm, reduces treatment costs, improves resource utilization efficiency, saves electricity, and reduces environmental pollution.
Smart Images
Figure CN224258437U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aquaculture wastewater treatment technology, and in particular to a concentrated wastewater treatment system for reuse in aquaculture farms. Background Technology
[0002] In the operation of large-scale farms, a large amount of wastewater is generated daily. With increasingly stringent environmental protection requirements, wastewater reuse technology has been widely used in farm wastewater treatment. The farm wastewater first undergoes advanced treatment processes before entering the wastewater reuse system. After being treated by sand filtration, carbon filtration, and ultrafiltration devices, the wastewater is further treated by reverse osmosis modules, producing a large amount of reverse osmosis concentrate. This concentrate typically contains high concentrations of pollutants such as salt, organic matter, and ammonia nitrogen. Direct discharge of this concentrate would cause serious pollution to surrounding water bodies and soil.
[0003] Currently, for the treatment of concentrated wastewater from aquaculture farms, existing technologies mainly employ a combination of processes such as mechanical filtration, chemical precipitation, and membrane separation. For example, some treatment systems first remove large suspended solids from the concentrated wastewater using mechanical filtration equipment such as screens and grit chambers, then use chemical agents for precipitation to remove heavy metal ions and some organic matter from the water. Afterward, reverse osmosis membranes or nanofiltration membranes are used for further separation treatment to reduce the salt and pollutant concentrations in the concentrated wastewater.
[0004] For example, a multi-application scenario aquaculture farm wastewater reuse system disclosed in patent number CN202421103624.1 can effectively solve the problems of water shortage and external drainage in aquaculture farms. However, the issue of where to dispose of 25%-30% of the concentrated wastewater from the reuse process urgently needs to be addressed. Previous industrial wastewater treatment devices, such as the zero-discharge method based on a combination of membrane desalination and evaporation disclosed in patent number CN202311818729.5, suffer from high energy consumption and high operating costs, and cannot better adapt to and match the application scenarios of aquaculture farms.
[0005] Therefore, although existing technologies can address the issue of concentrated wastewater from farm water reuse to some extent, another prominent problem exists: the treatment cost of concentrated wastewater is high and the treatment process is difficult. Traditional concentrated wastewater treatment processes often consume a large amount of electricity and other resources, resulting in high treatment costs. At the same time, for high-concentration reverse osmosis concentrated wastewater, existing treatment processes cannot achieve efficient volume reduction and zero discharge, thus limiting the further promotion and application of farm water reuse technology. Therefore, it is urgent to propose a farm water reuse concentrated wastewater treatment system to solve the above problems. Utility Model Content
[0006] To overcome the above shortcomings, this utility model provides a wastewater treatment system for reused wastewater in aquaculture farms, which aims to improve the problem of difficult discharge of wastewater from reused wastewater in large-scale aquaculture farms in the prior art.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A wastewater treatment system for reuse in aquaculture farms includes a reverse osmosis membrane module and a wastewater collection device, a deodorization device, a sedimentation device, an evaporation device, and a reuse water collection device that are connected in sequence by pipes.
[0009] The concentrate collection device includes a concentrate tank, which is connected to the reverse osmosis membrane assembly via a first pipe.
[0010] The deodorization device includes a deodorization water supply pump and a circulating water tank, wherein the deodorization water supply pump is connected to the concentrated water tank and the circulating water tank.
[0011] The sedimentation device includes a sedimentation tank and a deodorizing wastewater drainage pump, wherein the deodorizing wastewater drainage pump is connected to the circulating water tank and the sedimentation tank.
[0012] The evaporation device includes an evaporator and an evaporator water supply pump, wherein the evaporator water supply pump is connected to the sedimentation tank and the evaporator;
[0013] The recycled water collection device includes a recycled water storage tank, which is connected to the evaporator via a second pipe and to the reverse osmosis membrane module via a third pipe.
[0014] As a further description of the above technical solution:
[0015] The bottom of the circulating water tank is equipped with a circulating water pump, and the output end of the circulating water pump is fixedly connected to a circulating water supply pipe. The other end of the circulating water supply pipe is connected to the top water distribution trough.
[0016] As a further description of the above technical solution:
[0017] A filler wall is provided below the top water distribution trough, and a water collection trough is provided below the filler wall.
[0018] As a further description of the above technical solution:
[0019] The water collection tank and the circulating water tank are connected by a circulating water return pipe.
[0020] As a further description of the above technical solution:
[0021] The deodorization device also includes a fan, which is located on the front side of the packing wall.
[0022] As a further description of the above technical solution:
[0023] The sedimentation tank is equipped with inclined tube packing and a sludge hopper, and the bottom of the sludge hopper is equipped with a sludge discharge pipe.
[0024] As a further description of the above technical solution:
[0025] A solar power supply device is connected to one side of the evaporator, and a biogas power supply device is connected to the other side of the evaporator.
[0026] This utility model has the following beneficial effects:
[0027] 1. In this utility model, by treating the reverse osmosis concentrate after the reverse osmosis membrane module is processed through the concentrate collection device, deodorization device, sedimentation device, evaporation device, and recycled water collection device in this system, zero discharge of concentrated wastewater from the aquaculture farm can be achieved. This not only improves the efficiency of wastewater reuse treatment and achieves zero discharge, but also reduces treatment costs.
[0028] 2. In this utility model, the reuse of greywater is combined with the deodorization device at the end of the farm. The device uses the wind power of the fan at the end of the farm to evaporate the greywater. While treating the odor of the farm, the volume of the greywater reuse reverse osmosis concentrate is greatly reduced. The farm uses solar energy and biogas energy to power the evaporation device, which can save electricity efficiently. Moreover, the evaporation of the concentrated water after volume reduction further separates solids and clean water, achieving low-cost zero discharge of concentrated water. This solves the problem of difficult discharge of concentrated water from greywater reuse in large-scale farms, and improves resource utilization efficiency and system economy. Attached Figure Description
[0029] Figure 1 This is a three-dimensional schematic diagram of a wastewater treatment system for reclaimed water in a livestock farm, as proposed in this utility model.
[0030] Figure 2 This is a schematic diagram of the concentrated water collection device of a concentrated water treatment system for wastewater reuse in aquaculture farms, as proposed in this utility model.
[0031] Figure 3 This is a schematic diagram of the deodorization device of a wastewater treatment system for farm water reuse proposed in this utility model.
[0032] Figure 4 This is a schematic diagram of the sedimentation device of a concentrated wastewater treatment system for aquaculture farms proposed in this utility model.
[0033] Figure 5 This is a schematic diagram of the evaporation device of a concentrated wastewater treatment system for aquaculture farms proposed in this utility model.
[0034] Figure 6 This is a schematic diagram of the reclaimed water collection device of a concentrated wastewater treatment system for aquaculture farms, as proposed in this utility model.
[0035] Legend:
[0036] 1. Concentrate collection device; 2. Deodorization device; 3. Sedimentation device; 4. Evaporation device; 5. Reclaimed water collection device; 6. Reverse osmosis membrane module; 7. First pipeline; 8. Concentrate tank; 9. Deodorized water supply pump; 10. Circulating water tank; 11. Circulating water pump; 12. Circulating water supply pipeline; 13. Top water distribution trough; 14. Packing wall; 15. Water collection trough; 16. Circulating water return pipeline; 17. Deodorized wastewater drainage pump; 18. Sedimentation tank; 181. Inclined tube packing; 182. Sludge hopper; 183. Sludge discharge pipe; 19. Evaporation water supply pump; 20. Evaporator; 201. Solid discharge port; 21. Solar power supply device; 22. Biogas power supply device; 23. Second pipeline; 24. Reclaimed water storage tank; 25. Third pipeline; 26. Blower. Detailed Implementation
[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0038] Reference Figures 1-6 This utility model provides an embodiment of a concentrated wastewater treatment system for aquaculture farms, comprising a reverse osmosis membrane module 6, and a concentrated wastewater collection device 1, a deodorization device 2, a sedimentation device 3, an evaporation device 4, and a recycled water collection device 5 connected sequentially by pipes. The concentrated wastewater collection device 1 contains a concentrated wastewater tank 8, the inner wall of which is coated with an epoxy resin anti-corrosion coating to effectively prevent corrosion of the tank wall by acidic or alkaline substances in the concentrated wastewater. A first pipe 7 connects the reverse osmosis membrane module 6 to the concentrated wastewater tank 8. The deodorization device 2 contains a deodorization water supply pump 9, a circulating water tank 10, a top water distribution trough 13, a packing wall 14, a water collection trough 15, and a blower 26. The input end of the deodorization water supply pump 9 is connected to the concentrated wastewater tank 8 via a pipe, and the output end of the deodorization water supply pump 9 is connected to the circulating water tank 10. A circulating water pump 11 is installed at the bottom of the box 10. The output end of the circulating water pump 11 is fixedly connected to a circulating water supply pipe 12. The other end of the circulating water supply pipe 12 is connected to the top water distribution trough 13. A packing wall 14 is installed below the top water distribution trough 13. The packing wall 14 is located behind the fan 26, that is, the fan (26) is in front of the packing wall (14). The packing wall 14 is composed of polypropylene Pall ring packing and a stainless steel support frame. The polypropylene Pall ring packing has the characteristics of large specific surface area, high porosity, and corrosion resistance. Its diameter is 50 mm, its height is 50 mm, and its bulk density is 90 kg / m³. 3The stainless steel support frame is welded from 304 stainless steel square tubing and is used to support the packing layer, ensuring the stability of the packing wall 14. A water collection trough 15 is located below the packing wall 14, connected to a circulating water return pipe 16. The other end of the circulating water return pipe 16 is connected to the circulating water tank 10. The deodorization device 2 is connected to the sedimentation device 3. The sedimentation device 3 contains a deodorization wastewater drainage pump 17 and a sedimentation tank 18. The sedimentation tank 18 is a reinforced concrete structure, containing inclined tube packing 181 and a sludge hopper 182. The inclined tube packing 181 is made of polypropylene, with a diameter of 50 mm, a length of 1000 mm, and an inclination angle of 60°, used to improve sedimentation efficiency. The sludge hopper 182 has a conical structure and a sludge discharge pipe 183 at the bottom for discharging settled solid waste (such as sludge and feces). The input end of the deodorizing wastewater drainage pump 17 is connected to the circulating water tank 10, and the output end of the deodorizing wastewater drainage pump 17 is connected to the sedimentation tank 18. The sedimentation device 3 is connected to the evaporation device 4, which includes an evaporation water supply pump 19 and an evaporator 20. The input end of the evaporation water supply pump 19 is connected to the sedimentation tank 18, and the output end of the evaporation water supply pump 19 is connected to the evaporator 20. A solar energy supply device 21 is connected to one side of the evaporator 20, and a biogas energy supply device 22 is connected to the other side of the evaporator 20. The evaporator 20 is heated by the solar energy supply device 21 and the biogas energy supply device 22. The evaporator 20 is powered by either electricity or other energy sources. The evaporator 20 is equipped with a solid discharge port 201 and a condensate outlet. The solids produced after evaporation are discharged through the solid discharge port 201 of the evaporator 20. The condensate is transported through the condensate outlet of the evaporator 20 to the recycled water storage tank 24 via the second pipe 23. The evaporator 4 is connected to the recycled water collection device 5. The recycled water collection device 5 is equipped with a recycled water storage tank 24. The recycled water storage tank 24 is equipped with the second pipe 23. The evaporator 20 is connected to the recycled water storage tank 24 via the second pipe 23. The recycled water storage tank 24 is also equipped with a third pipe 25. The recycled water storage tank 24 is connected to the reverse osmosis membrane module 6 via the third pipe 25.
[0039] Specifically, this treatment system is connected to the reverse osmosis module 6 of the aquaculture farm's wastewater reuse system via pipelines. The farm's wastewater undergoes advanced treatment before entering the wastewater reuse system. After being treated by sand filtration, carbon filtration, and ultrafiltration devices, the wastewater passes through the reverse osmosis module 6 to produce a large amount of reverse osmosis concentrate. This concentrate flows slowly into the concentrate tank 8 via the first pipeline 7. The concentrate tank 8 collects and stores the concentrate. Concentrate tank 8 is constructed of special corrosion-resistant material and is equipped with an internal level monitoring device to monitor the concentrate level in real time, ensuring it remains within a safe storage range. When the concentrate reaches a certain level, the deodorization water supply pump 9 is activated. This pump delivers the concentrate to the circulating water tank 10 at a stable flow rate. Equipped with an intelligent dosing system, the system can add deodorizing agent at regular intervals and in measured quantities according to the quality and quantity of the concentrated water. The bottom of the circulating water tank 10 is equipped with a circulating water pump 11, which can transport the concentrated water to the top water distribution tank 13 through the circulating water supply pipe 12. The bottom of the top water distribution tank 13 has evenly distributed round holes with a spacing of 10cm and a diameter of 4mm. The concentrated water flows out from the round holes by gravity and passes through the packing wall 14. The packing wall 14 is made of a special high specific surface area material with a rough and porous surface, which can greatly increase the contact area between the concentrated water and the air. During the process of the concentrated water hanging on the packing wall 14, the wind generated by the fan 26 blows directly onto the packing wall 14, which can accelerate the evaporation of water. According to the test, this wind-assisted evaporation method can improve the water evaporation efficiency by about 60%.The evaporated water enters the air, while the unevaporated concentrated water flows into the collection tank 15 and then returns to the circulating water tank 10 through the circulating water return pipe 16, forming a circulation system. Based on the characteristics of the added deodorizing agent, the water in the circulating water tank 10 circulates for several hours, effectively removing pollutants and odors. At this point, the deodorized wastewater drainage pump 17 is started, transporting the deodorized wastewater through a pipeline to the sedimentation tank 18. The sedimentation tank 18 is equipped with inclined tube packing 181 and a sludge hopper 182, which effectively improves sedimentation efficiency. After sedimentation treatment in the sedimentation tank 18, suspended solids, colloids, and other impurities in the water gradually settle. The resulting sludge and manure mixture can be discharged through the sludge discharge pipe 183 and collected as a high-quality raw material for organic fertilizer production. The supernatant after sedimentation is then transported into the evaporator 20 through a pipeline by the evaporation water supply pump 19. The evaporator 20 is powered by a solar energy supply device 21 and a biogas supply device 22. The solar energy supply device 21 is equipped with high-efficiency solar collectors and an energy storage system to convert solar energy into heat and electricity during the day and store it for use by the evaporator 20. The biogas supply device 22 uses biogas produced by the farm to generate electricity and heat through combustion, achieving energy self-sufficiency. The evaporator 20 is equipped with a solid discharge port 201 and a condensate outlet. After evaporation, the solids produced are discharged through the solid discharge port 201, while the condensate is transported through the condensate outlet and the second pipe 23 to the recycled water storage tank 24. The recycled water storage tank 24 not only receives the condensate produced by the evaporator 20, but also receives the clean water produced inside the reverse osmosis membrane module 6 through the third pipe 25. According to the reuse situation in the farm, the water in the recycled water storage tank 24 can be accurately transported through the water supply pump and pipeline to various application scenarios such as pen washing, farm disinfection, water curtain cooling, and odor control. This will enable the efficient recycling of water resources, truly achieve the goal of zero discharge of concentrated wastewater from farms, and provide a strong guarantee for the green and sustainable development of farms.
[0040] Working principle: Wastewater from a livestock farm (taking a pig farm as an example) is treated by a greywater reuse system and then transported through pipelines to the reverse osmosis membrane module 6. The concentrated greywater after treatment by the reverse osmosis membrane module 6 flows through the first pipeline 7 to the concentrated water tank 8 for storage. Then, the deodorizing water supply pump 9 is started, which transports the concentrated water to the circulating water tank 10. Deodorizing agent can be added to the circulating water tank 10 at regular intervals and in measured quantities. At the same time, the circulating water pump 11 at the bottom of the circulating water tank 10 is started to supply concentrated water through the circulating water system. Water is delivered through pipe 12 to the top water distribution trough 13. The bottom of the top water distribution trough 13 has round holes spaced 10cm apart with a diameter of 4mm. Concentrated water flows by gravity through the packing wall 14 and into the collection trough 15 for collection. Then, it flows back to the circulating water tank 10 through the circulating water return pipe 16. During the water-carrying process of the packing wall 14, the air generated by the blower 26 directly blows the water, causing a large amount of water to evaporate. The water in the circulating water tank 10 is circulated for several hours according to the characteristics of the added deodorizing agent before being drained. The deodorized wastewater is then treated with deodorizing wastewater treatment... The water drainage pump 17 is started and transported through pipelines to the sedimentation tank 18 for treatment. After deodorization, the wastewater passes through the sedimentation tank 18 for sedimentation. The resulting sludge and pig manure are discharged through the sludge discharge pipe 183. After collection and mixing, they can be used for organic fertilizer production. The supernatant water in the sedimentation tank 18 is transported through pipelines to the evaporator 20 via the evaporation water supply pump 19. The evaporator 20 is powered by a solar energy supply device 21 and a biogas energy supply device 22 to provide heat and electricity for its normal operation. The evaporator 20 is also equipped with a solid discharge port 201 and a condensate outlet. The solids produced after evaporation are discharged through the solids outlet 201 of the evaporator 20. The condensate is transported through the condensate outlet of the evaporator 20 to the recycled water storage tank 24 for storage via the second pipe 23. At the same time, the recycled water storage tank 24 can also receive the clean water produced inside the reverse osmosis membrane module 6 through the third pipe 25. Depending on the reuse situation in the field, the recycled water storage tank 24 can be transported through the water supply pump to water points for application scenarios such as pen washing, field disinfection, water curtain cooling, and odor control.
[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A wastewater treatment system for reuse in aquaculture farms, comprising a reverse osmosis membrane module (6), characterized in that, The treatment system also includes a concentrated water collection device (1), a deodorization device (2), a sedimentation device (3), an evaporation device (4), and a recycled water collection device (5) connected in sequence by pipelines. The concentrate collection device (1) includes a concentrate tank (8), which is connected to the reverse osmosis membrane module (6) through a first pipe (7). The deodorization device (2) includes a deodorization water supply pump (9) and a circulating water tank (10). The deodorization water supply pump (9) is connected to the concentrated water tank (8) and the circulating water tank (10). The sedimentation device (3) includes a sedimentation tank (18) and a deodorizing wastewater drainage pump (17), wherein the deodorizing wastewater drainage pump (17) is connected to the circulating water tank (10) and the sedimentation tank (18); The evaporation device (4) includes an evaporator (20) and an evaporator water supply pump (19), wherein the evaporator water supply pump (19) is connected to the sedimentation tank (18) and the evaporator (20); The recycled water collection device (5) includes a recycled water storage tank (24), which is connected to the evaporator (20) through a second pipe (23) and to the reverse osmosis membrane module (6) through a third pipe (25).
2. The concentrated wastewater treatment system for farm water reuse according to claim 1, characterized in that, The bottom of the circulating water tank (10) is equipped with a circulating water pump (11), and the output end of the circulating water pump (11) is fixedly connected to a circulating water supply pipe (12). The other end of the circulating water supply pipe (12) is connected to the top water distribution trough (13).
3. The concentrated wastewater treatment system for farm water reuse according to claim 2, characterized in that, Below the top water distribution trough (13) is a filler wall (14), and below the filler wall (14) is a water collection trough (15).
4. A concentrated wastewater treatment system for farm water reuse according to claim 3, characterized in that, The water collection tank (15) is connected to the circulating water tank (10) through the circulating water return pipe (16).
5. A concentrated wastewater treatment system for farm water reuse according to claim 4, characterized in that, The deodorization device (2) also includes a fan (26) located in front of the packing wall (14).
6. A wastewater treatment system for reuse in aquaculture farms according to claim 5, characterized in that: The sedimentation tank (18) is equipped with inclined tube packing (181) and sludge hopper (182) inside, and the bottom of the sludge hopper (182) is equipped with sludge discharge pipe (183).
7. A concentrated wastewater treatment system for farm water reuse according to claim 1, characterized in that, The evaporator (20) is connected to a solar energy supply device (21) on one side and a biogas energy supply device (22) on the other side.