Short-process treatment system for mariculture source water
The seawater treatment system, which integrates submerged ultrafiltration membrane units and backwashing and chemical washing units, solves the problem of plankton and microbial proliferation in natural seawater, achieves efficient and by-product-free seawater purification, and improves the survival rate of aquatic products in marine aquaculture and ease of operation.
Patent Information
- Application Number
- CN202423029892.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In existing marine aquaculture systems, plankton, algae, and microorganisms multiply rapidly in natural seawater, making the microecological balance easily disrupted. Furthermore, commonly used disinfection methods produce harmful byproducts or are incomplete in their disinfection effects, failing to effectively remove bacteria and viruses and easily leading to fish diseases and other problems.
It uses an immersion ultrafiltration membrane unit to remove floating sludge and harmful microorganisms, and combines backwashing and chemical washing units for maintenance. The control unit integrated into the box works together to achieve efficient filtration and disinfection.
It achieves high-precision filtration, produces high-quality water with no harmful byproducts, improves the survival rate of farmed aquatic products, simplifies the operation process, and reduces water treatment costs.
Smart Images
Figure CN223620191U_ABST
Abstract
Description
Technical Field
[0001] This utility model specifically relates to a short-process treatment system for marine aquaculture source water. Background Technology
[0002] In recent years, my country's demand for seafood has been increasing year by year, and the scale of aquaculture has also been expanding. Currently, my country's total aquaculture output ranks among the top in the world. Natural seawater contains plankton, algae, and microorganisms with vigorous metabolism and rapid reproduction. Therefore, it is necessary to sterilize and disinfect natural seawater obtained from the ocean to prevent it from carrying harmful microorganisms into artificial aquaculture systems, disrupting the microecological balance of the aquaculture water, and even causing serious consequences such as fish diseases. In addition, natural seawater also contains a large amount of silt and impurities, especially after strong winds and waves. If these microorganisms and silt are not removed, they could pose a significant threat to seedling production.
[0003] For floating silt and impurities in natural seawater, methods such as sand filtration and coagulation sedimentation are generally used for removal. For viruses, bacteria, and other microorganisms present in natural seawater, sodium hypochlorite, chlorine dioxide, and formaldehyde are commonly used as disinfectants. However, these methods result in high residual chlorine levels in the treated seawater, and chlorine disinfection produces some harmful byproducts. For example, since the 1970s, it has been discovered that chlorine disinfection produces halomethanes and haloacetic acids with "three-way" effects (carcinogenic, teratogenic, and mutagenic); by the end of the 20th century, a series of disinfection byproducts with even higher toxicity, such as halofuranones, haloacetonitrs, and halonitromethanes, were discovered. Ultraviolet (UV) sterilizers are also widely used in natural seawater disinfection. However, due to limitations in its process principle, UV disinfection has the following drawbacks: UV sterilization is only effective during irradiation; once the treated water leaves the sterilizer, it loses its residual disinfection capacity and is susceptible to secondary contamination. Even if a bacterium is not inactivated and enters a downstream system, it cannot prevent it from adhering to the surface of downstream pipes and multiplying. Only microorganisms that absorb UV light are inactivated; therefore, for water with high suspended solids and poor water quality, such as sewage, the disinfection effect is difficult to guarantee because suspended solids can protect microorganisms from harm. Furthermore, bacteria are not removed in the UV sterilizer but are transformed into pyrogens; the killed microorganisms and other pollutants become food for the surviving bacteria. Utility Model Content
[0004] The purpose of this invention is to provide a short-process treatment system for marine aquaculture source water.
[0005] The technical solution of this utility model is as follows:
[0006] A short-process treatment system for marine aquaculture source water, including
[0007] One box;
[0008] A submersible ultrafiltration membrane unit is used to remove harmful microorganisms from seawater in a single step, thereby obtaining clean seawater;
[0009] A backwashing and chemical washing unit is used to backwash and add sodium hypochlorite to the above-mentioned submerged ultrafiltration membrane unit;
[0010] An aquaculture unit uses clean seawater obtained from the aforementioned submerged ultrafiltration membrane unit to cultivate marine economic organisms within it.
[0011] A control unit is used to control the coordinated operation of the submerged ultrafiltration membrane unit, the backwashing and chemical washing unit, and the aquaculture unit;
[0012] The aforementioned submersible ultrafiltration membrane unit, backwashing and chemical washing unit, and aquaculture unit are all integrated into the aforementioned housing.
[0013] In a preferred embodiment of this utility model,
[0014] The submerged ultrafiltration membrane unit includes a membrane tank and at least one submerged ultrafiltration membrane module disposed in the membrane tank;
[0015] The backwashing and chemical washing unit includes a backwashing tank, a primary sodium dosing tank, a backwashing pump, and the pipelines connected to them.
[0016] The aquaculture unit includes at least one aquaculture tank, one blower, one water pump, and the connecting pipelines.
[0017] The source water for seawater aquaculture is connected to the inlet of the membrane tank via a thirteenth electrically controlled valve; the outlet of at least one submerged ultrafiltration membrane module is connected to the inlet of the permeate pump via a first electrically controlled valve, and the outlet of the permeate pump is connected to the inlet of the sodium hypochlorite dosing tank, the backwash tank, and at least one aquaculture tank via second, third, and fourth electrically controlled valves, respectively; the outlet of the backwash tank is connected to the inlet of the backwash pump via a fifth electrically controlled valve, and the outlet of the backwash pump is connected to the outlet of at least one submerged ultrafiltration membrane module via sixth and seventh electrically controlled valves, respectively; the outlet of the sodium hypochlorite dosing tank is connected to the outlet of at least one submerged ultrafiltration membrane module via a seventh electrically controlled valve; the outlet of the aquaculture tank is connected to the downstream wastewater treatment system via an eighth electrically controlled valve; the outlet of the blower is connected to the membrane tank and at least one aquaculture tank, respectively; the control unit is electrically connected to the permeate pump, the backwash pump, the blower, and all electrically controlled valves.
[0018] More preferably, a first check valve is provided at the outlet of the water pump.
[0019] More preferably, a ninth electrically controlled valve is provided at the outlet of the first check valve.
[0020] More preferably, a second check valve is provided between the outlet of the backwash pump and the sixth electrically controlled valve.
[0021] More preferably, the outlet of the membrane tank is equipped with a tenth electrically controlled valve for controlling the emptying of the membrane tank.
[0022] More preferably, the outlet of the backwash tank is equipped with an eleventh electrically controlled valve for controlling the emptying of the backwash tank.
[0023] More preferably, the outlet of the breeding tank is equipped with a twelfth electrically controlled valve to control the emptying of the breeding tank.
[0024] The beneficial effects of this utility model are:
[0025] 1. This utility model is integrated into a single box, with a high degree of integration. It uses a submerged ultrafiltration membrane module as its core, resulting in high filtration accuracy and good water quality. The submerged ultrafiltration membrane module can remove floating mud and harmful microorganisms from natural seawater without producing harmful byproducts. It will not have a harmful impact on the artificial seawater aquaculture system and can improve the survival rate of aquatic products.
[0026] 2. The source water of this utility model directly enters the submerged ultrafiltration membrane module for treatment, without the need for pretreatment, with a short process, and is suitable for incoming water with large fluctuations in water quality.
[0027] 3. This utility model can meet various natural seawater source conditions, is simple to operate, has low operating pressure, produces good effluent quality, has a large flow rate, and causes no secondary pollution.
[0028] 4. This utility model does not require the addition of additional chemical agents, resulting in lower water treatment costs. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0030] The technical solution of this utility model will be further explained and described below with reference to specific embodiments and accompanying drawings.
[0031] like Figure 1 As shown, a short-process treatment system for marine aquaculture source water includes...
[0032] Box 1;
[0033] A submersible ultrafiltration membrane unit 2 is used to remove harmful microorganisms from seawater in one pass, thereby obtaining clean seawater;
[0034] A backwashing and chemical washing unit is used to backwash and add sodium hypochlorite to the above-mentioned submerged ultrafiltration membrane unit 2.
[0035] An aquaculture unit is used to cultivate marine economic organisms in the clean seawater obtained from the above-mentioned submerged ultrafiltration membrane unit 2.
[0036] A control unit (not shown in the figure) is used to control the coordinated operation of the submerged ultrafiltration membrane unit, the backwashing and chemical washing unit, and the aquaculture unit;
[0037] The aforementioned submerged ultrafiltration membrane unit 2, backwashing and chemical washing unit, and aquaculture unit are all integrated within the aforementioned housing 1.
[0038] The submerged ultrafiltration membrane unit 2 includes a membrane tank 20 and at least one submerged ultrafiltration membrane module 21 disposed in the membrane tank 20; the outlet of the membrane tank 20 is provided with a tenth electrically controlled valve 910 for controlling the emptying of the membrane tank 20; the at least one submerged ultrafiltration membrane module 21 is used to filter and retain pathogenic microorganisms such as bacteria and viruses in the source water, preferably a hollow fiber ultrafiltration membrane or a flat sheet ceramic ultrafiltration membrane; the hollow fiber ultrafiltration membrane has a molecular weight cutoff of 60,000-150,000D, a transmembrane pressure difference of 0.01-0.5 bar, a flux of 10-30 LMH, and the area of a single hollow fiber ultrafiltration membrane is 10-2600 square meters; the flat sheet ceramic ultrafiltration membrane has a filtration accuracy of 8-200 nm, a transmembrane pressure difference of 0.01-0.8 bar, a flux of 15-40 LMH, and the area of a single flat sheet ceramic ultrafiltration membrane is 10-600 square meters.
[0039] The source of water for seawater aquaculture is connected to the inlet of membrane tank 20 via a thirteenth electrically controlled valve 913.
[0040] The backwashing and chemical washing unit includes a backwashing tank 3, a primary sodium dosing tank 5, a backwashing pump 7, and the pipelines connected to them.
[0041] The breeding unit includes at least one breeding tank 4, one fan 8, one water pump 6, and the pipelines connected to it.
[0042] The outlet of at least one submerged ultrafiltration membrane module 21 is connected to the inlet of a product water pump 6 through a first electrically controlled valve 901. The outlet of the product water pump 6 is provided with a first check valve 61. The outlet of the first check valve 61 is provided with a ninth electrically controlled valve 909. The outlet of the ninth electrically controlled valve 909 is then connected to the inlet of a sodium hypochlorite dosing tank 5, a backwash tank 3, and at least one aquaculture tank 4 through a second electrically controlled valve 902, a third electrically controlled valve 903, and a fourth electrically controlled valve 904, respectively.
[0043] The outlet of backwash tank 3 is connected to the inlet of backwash pump 7 through the fifth solenoid valve 905. The outlet of backwash pump 7 is equipped with a second check valve 71. Then, the outlet of the second check valve 71 is connected to the product water port of at least one submerged ultrafiltration membrane module 21 through the sixth solenoid valve 906 and the seventh solenoid valve 907 in sequence. The outlet of backwash tank 3 is equipped with an eleventh solenoid valve 911 to control the emptying of backwash tank 3.
[0044] Sodium dosing tank 5 is used for maintenance cleaning and chemical cleaning of submerged ultrafiltration membrane module 21 to remove contaminants from submerged ultrafiltration membrane module 21. Its outlet is connected to the product water port of at least one submerged ultrafiltration membrane module 21 through the seventh solenoid valve 907.
[0045] The outlet of the aquaculture tank 4 is connected to the downstream tailwater treatment system through the eighth solenoid valve 908. The outlet is also equipped with a twelfth solenoid valve 912 to control the emptying of the aquaculture tank 4.
[0046] The air outlet of the blower 8 is connected to the membrane tank 20 and at least one aquaculture tank 4 respectively;
[0047] The control unit is electrically connected to the water production pump 6, backwash pump 7, blower 8, and all electrically controlled valves, thereby controlling the operation and coordination of each equipment component of the short-process treatment system for marine aquaculture source water.
[0048] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the present utility model patent and the contents of the specification should still fall within the scope of the present utility model.
Claims
1. A short-process treatment system for seawater aquaculture source water, characterized in that: include One box; A submerged ultrafiltration membrane unit is used to remove harmful microorganisms from seawater in one pass, thereby obtaining clean seawater; a backwashing and chemical washing unit is used to backwash and add sodium hypochlorite to the above-mentioned submerged ultrafiltration membrane unit. An aquaculture unit uses clean seawater obtained from the aforementioned submerged ultrafiltration membrane unit to cultivate marine economic organisms within it. A control unit is used to control the coordinated operation of the submerged ultrafiltration membrane unit, the backwashing and chemical washing unit, and the aquaculture unit; The aforementioned submersible ultrafiltration membrane unit, backwashing and chemical washing unit, and aquaculture unit are all integrated into the aforementioned housing.
2. The short-process treatment system for marine aquaculture source water as described in claim 1, characterized in that: The submerged ultrafiltration membrane unit includes a membrane tank and at least one submerged ultrafiltration membrane module disposed in the membrane tank; The backwashing and chemical washing unit includes a backwashing tank, a primary sodium dosing tank, a backwashing pump, and connected piping; the aquaculture unit includes at least one aquaculture tank, a blower, a water pump, and connected piping. The source water for seawater aquaculture is connected to the inlet of the membrane tank via a thirteenth electrically controlled valve; the outlet of at least one submerged ultrafiltration membrane module is connected to the inlet of the permeate pump via a first electrically controlled valve, and the outlet of the permeate pump is connected to the inlet of the sodium hypochlorite dosing tank, the backwash tank, and at least one aquaculture tank via second, third, and fourth electrically controlled valves, respectively; the outlet of the backwash tank is connected to the inlet of the backwash pump via a fifth electrically controlled valve, and the outlet of the backwash pump is connected to the outlet of at least one submerged ultrafiltration membrane module via sixth and seventh electrically controlled valves, respectively; the outlet of the sodium hypochlorite dosing tank is connected to the outlet of at least one submerged ultrafiltration membrane module via a seventh electrically controlled valve; the outlet of the aquaculture tank is connected to the downstream wastewater treatment system via an eighth electrically controlled valve; the outlet of the blower is connected to the membrane tank and at least one aquaculture tank, respectively; the control unit is electrically connected to the permeate pump, the backwash pump, the blower, and all electrically controlled valves.
3. The short-process treatment system for marine aquaculture source water as described in claim 2, characterized in that: A first check valve is installed at the outlet of the water production pump.
4. The short-process treatment system for marine aquaculture source water as described in claim 3, characterized in that: A ninth electrically controlled valve is installed at the outlet of the first check valve.
5. The short-process treatment system for marine aquaculture source water as described in claim 2, characterized in that: A second check valve is provided between the outlet of the backwash pump and the sixth electrically controlled valve.
6. The short-process treatment system for marine aquaculture source water as described in claim 2, characterized in that: The outlet of the membrane tank is equipped with a tenth electrically controlled valve to control the emptying of the membrane tank.
7. The short-process treatment system for marine aquaculture source water as described in claim 2, characterized in that: The outlet of the backwash tank is equipped with an eleventh electrically controlled valve to control the emptying of the backwash tank.
8. The short-process treatment system for marine aquaculture source water as described in claim 2, characterized in that: The outlet of the breeding tank is equipped with a twelfth electrically controlled valve to control the emptying of the breeding tank.