Dialysis system for treatment of breeding tail water

Abstract

The utility model provides an aquaculture tail water treatment dialysis system which is provided with a tail water treatment subsystem, and the tail water treatment subsystem comprises a dialysis separation unit and a micro-nano aeration unit; the dialysis separation unit comprises a micro-power mixing module and a micro-filtration precipitation module, and the micro-power mixing module and the micro-filtration precipitation module are jointly used for separating solid organic matters in the tail water; an inlet of the micro-power mixing module is connected with the inlet water and tail water collecting module; the micro-nano aeration unit is used for filling micro-nano bubbles into tail water flowing into the micro-nano aeration unit so as to accelerate pollutant degradation. The tail water treatment reaches the standard and is suitable for tail water treatment of various aquaculture, the cleaning mode is convenient and rapid, dredging work does not need to be carried out in a large-area range, the aquaculture tail water discharging quality is improved, and the total aquaculture tail water discharging amount is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of tail water treatment of aquaculture systems, and in particular to a dialysis system for treating tail water of aquaculture systems. Background Art

[0002] In the prior art, the aquaculture tailwater treatment is typically represented by the "three pools, two dams and one wetland" model. During the implementation of the project, due to the large design area of ​​ecological ditches and sedimentation tanks, it is difficult to clean up the accumulated sludge, which leads to the continuous accumulation and dissolution and fermentation of aquaculture manure in ecological ditches, sedimentation tanks and other locations, which increases the load of the aeration tank and biological purification tank at the back end of the system. During use, it is easy to produce a phenomenon of lower removal rate or more serious pollution of effluent than influent. Furthermore, the tailwater treatment system in the prior art generally occupies about 10% of the aquaculture area, resulting in low land utilization rate and reduced aquaculture output. It is contrary to the interests of farmers to increase production and income, resulting in the lack of active cooperation between aquaculture units and farmers, and the lack of strong willingness to maintain and use tailwater treatment facilities and equipment after completion. It can be seen that the tailwater treatment scheme in the prior art cannot solve the problems of aquaculture pollution and tailwater treatment from the source, fails to improve the water quality of aquaculture water bodies, and is difficult to increase production and income for farmers. There are many obstacles to the later maintenance of the built tailwater treatment facilities, which increases the subsequent burden. Furthermore, the energy consumption of water treatment equipment in the prior art is high, the types of flocculants are unreasonable, and a variety of miscellaneous algae are often used to construct mixed flocculants, resulting in poor flocculation effect. Therefore, how to improve the tailwater treatment technology of the aquaculture system in the prior art, improve the quality of the treated tailwater, reasonably treat solid pollutants, and reduce the land area of ​​the tailwater treatment system are many problems that need to be solved urgently. Utility Model Content

[0003] In order to overcome at least one of the many problems in the related art, the present disclosure provides a dialysis system for aquaculture tailwater treatment, including a tailwater treatment subsystem, wherein the tailwater treatment subsystem includes a dialysis separation unit and a micro-nano aeration unit. The technical solution of the present disclosure effectively reduces the footprint of the equipment. The tailwater treatment system of the present disclosure generally occupies about 1%-2% of the aquaculture area, which is much less than the 10% specified in the prior art.

[0004] The dialysis separation unit is used to remove solid pollutants in water;

[0005] The micro-nano aeration unit is used to accelerate the biodegradation of tail water treated by the dialysis analysis unit;

[0006] The dialysis separation unit includes a micro-power mixing module and a micro-filtration sedimentation module, which are used together to separate solid organic matter in the tail water; the inlet of the micro-power mixing module is connected to the inlet tail water collection module;

[0007] The described micro-nano aeration unit is connected to the water outlet of the micro-power mixing module, and the microfiltration sedimentation module is connected to the mud outlet of the micro-power mixing module;

[0008] The micro-nano aeration unit injects micro-nano bubbles into the influent tail water to accelerate the degradation of pollutants.

[0009] In an optional embodiment, the micro-power mixing module is provided with an inlet, a gas source inlet, and a microbial flocculant inlet. Among them, the gas source inlet is used to inflate the tail water flowing through the inlet; the microbial flocculant inlet is arranged downstream of the gas source inlet, and the microbial flocculant inlet is used to add microbial flocculant to the inflated tail water.

[0010] In an optional embodiment, a suspended packing carrier is arranged in the micro-nano aeration unit to promote the survival of microorganisms.

[0011] In an optional embodiment, the micro-power mixing module includes a main body part. The upper part of the side wall of the main body part is provided with a first outlet, and a floating mud baffle is arranged upstream of the first outlet.

[0012] In an optional embodiment, the dialysis separation unit further includes a clarified effluent module and an adsorption packing module. The water outlet of the micro-power mixing module is first connected to the inlet of the clarified effluent module, and then the water outlet of the clarified effluent module is connected to the micro-nano aeration unit. The mud outlet of the clarified effluent module is connected to the inlet of the adsorption packing module, and the mud outlet of the microfiltration sedimentation module is connected to the inlet of the adsorption packing module.

[0013] In an optional embodiment, the mud outlet of the microfiltration sedimentation module is connected to the inlet of the concentrate collection module.

[0014] In an optional embodiment, the mud outlet of the adsorption packing module is connected to the inlet of the concentrate collection module.

[0015] In an optional embodiment, the tail water treatment dialysis system further includes a tail water discharge module and an aquaculture function subsystem; the outlet of the micro-nano aeration unit is connected to the inlet of the tail water discharge module; the outlet of the aquaculture function subsystem is connected to the inlet of the micro-power mixing module through an inlet ditch or pipeline, and the aquaculture tail water is discharged into the dialysis separation unit for treatment.

[0016] In an optional embodiment, the first outlet of the tail water discharge module is connected to the aquaculture function subsystem to realize the recycling of the treated tail water; the second outlet of the tail water discharge module is connected to the external river channel, and the qualified tail water can be discharged into the external river channel.

[0017] The technical solution of the present disclosure has the following advantages or beneficial effects:

[0018] (1) Through the combination of multiple modules in the dialysis separation unit, phosphorus elements and suspended solids in the water body can be effectively removed, reducing the total phosphorus and suspended solid concentrations in the water body. In combination with the use of the micro-nano aeration unit, there is sufficient active oxygen in the water body, which can enhance the biological activity of aerobic microorganisms in the water and accelerate the biodegradation of pollutants that are difficult to remove in the effluent of the dialysis separation unit. As a result, the pollutant removal rate of the aquaculture system disclosed in this application is high, and the overall removal rates of common pollutant indicators such as suspended solids and permanganate index are controlled within the first-class standard of "Discharge Requirements for Freshwater Pond Aquaculture Water" (SC / T 9101-2007). Manure and other wastes in the aquaculture pond are effectively collected in the system, and the sludge cleaning method is convenient and fast, without the need for dredging work over a large area, improving the quality of aquaculture tail water discharge and reducing the total amount of aquaculture tail water discharge. Experimental data prove that the micro-power mixing module disclosed in this application consumes less energy than the mixing equipment in the prior art, but has the highest reduction efficiency for solid pollutants in sewage.

[0019] (2) The equipment occupies a small area. Compared with the prior art where 10% of the expected aquaculture area is used to build tail water treatment equipment, the area required for the disclosure is only about 1% of the aquaculture area.

[0020] (3) The micro-power mixing module is integrated with a gas source inlet and a microbial flocculant inlet. The introduced bubbles evenly mix the microbial flocculant and solids, enhancing the removal rate of solids. At the same time, the bubbles are released in the sewage, and oxygen in the air dissolves in the sewage, increasing the dissolved oxygen concentration in the sewage, reducing the air pump power of the subsequent micro-nano aeration tank, and reducing energy consumption.

[0021] (4) It has strong applicability and is applicable to the tail water of common aquaculture types such as freshwater fish, white shrimp, and Chinese mitten crabs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are used to better understand the present disclosure and do not constitute an improper limitation of the present disclosure. Among them:

[0023] Figure 1 is a schematic diagram of the aquaculture system according to an embodiment of the present disclosure;

[0024] Figure 2 is a schematic diagram of the micro-power mixing module according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following describes exemplary embodiments of the present disclosure with reference to the accompanying drawings. Various details of the embodiments of the present disclosure are included to facilitate understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, descriptions of well-known functions and structures are omitted in the following description for clarity and conciseness.

[0026] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a", "the", and "said" used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0027] It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0028] The existing methods for treating tail water cannot efficiently filter solid pollutants in the tail water, such as feces produced by aquaculture or residual bait that has not been consumed, resulting in the further accumulation and fermentation of solid pollutants, which exacerbates the degree of pollution. Moreover, there are still a large number of undegraded pollutants in the filtered water quality, making the treated tail water unable to be recycled, increasing the aquaculture cost of farmers. If directly discharged into the river network, it will pollute the natural water body and seriously damage the natural environment. For this reason, the present disclosure provides an aquaculture tail water treatment dialysis system, and this aquaculture system has a tail water treatment subsystem to solve at least one of the many problems described above.

[0029] See Figure 1 As shown, it shows the main structure of the aquaculture system involved in the aquaculture tail water treatment dialysis system of the present disclosure. Its main body mainly includes an aquaculture part and a tail water treatment part. The aquaculture part includes aquaculture ponds, etc., which are connected to the tail water treatment part through inlet ditches or pipelines, etc., to achieve the collection of tail water. The treated tail water can be connected to the aquaculture pond again through drainage ditches or pipelines, etc., or the tail water can be discharged to the tail water discharge module through drainage ditches or pipelines, etc., to achieve the recycling of water.

[0030] In one embodiment, the tail water treatment part is configured as a tail water treatment subsystem, and the tail water treatment subsystem includes a dialysis separation unit 4 and a micro-nano aeration unit. Among them, the dialysis separation unit 4 is used to separate pollutants such as feces and residual bait in the aquaculture tail water, so as to avoid the accumulation and continuous fermentation of fecal sewage in the aquaculture pond, and effectively solve the problem of water pollution caused by such solid pollutants. The micro-nano aeration unit is used to further treat the effluent treated by the dialysis separation unit. By introducing micro-nano bubbles into the tail water treatment equipment through the micro-nano aeration unit, the consumption of dissolved oxygen in the bubbles continuously supplements reactive oxygen to the water, which can enhance the biological activity of aerobic microorganisms in the water and accelerate the biodegradation of pollutants that are difficult to remove in the tail water, so as to achieve the purpose of water purification. The feces and residual bait and other solid organic matters in the aquaculture tail water after precipitation treatment by the dialysis separation unit are separated and enter the concentrate collection module (such as discharged through the sludge pipeline).

[0031] In an alternative embodiment, the dialysis separation unit includes a micro-power mixing module 1 and a microfiltration precipitation module 2, and the outlet of the micro-power mixing module is connected to the micro-nano aeration unit. The dialysis separation unit is used to remove phosphorus elements, suspended solids, feces, residual bait, etc. in the water body, and reduce the total phosphorus and suspended solid concentrations in the water body. See Figure 1 and 2 , the inlet 101 of the micro-power mixing module is connected to the influent tail water collection module (such as Figure 1 the shown influent ditch), the first outlet 104 of the micro-power mixing module is set as the outlet for discharging tail water; the second outlet 108 of the micro-power mixing module is set as the sludge outlet for discharging precipitates and is connected to the microfiltration precipitation module.

[0032] In an alternative embodiment, the micro-power mixing module has a main body 105, on which an inlet 101, a gas source inlet 102, a microbial flocculant inlet 103, a first outlet 104, a mixing pipeline 107, a second outlet 108, etc. are provided. The inlet 101, the gas source inlet 102, and the microbial flocculant inlet 103 are all provided on the mixing pipeline 107 of the micro-power mixer. Among them, the gas source inlet is used to inflate the tail water flowing through the inlet 101; the microbial flocculant inlet 103 is arranged downstream of the gas source inlet, and the microbial flocculant inlet 103 is used to add microbial flocculant 5 to the inflated tail water. The upper part of the side wall of the main body 105 is provided with a first outlet 104. The sewage with solids is introduced into the micro-power mixing module from the tail water collection module (such as an inlet ditch) through a water pump 109. The gas source inlet 102 on the mixing pipeline 107 continuously pumps gas into the tail water, so that the pumped sewage containing solids carries uniform bubbles. It should be noted that the gas here is a conventional gas, and the size of the bubbles is relatively large, which is different from the micro-nano gas pumped by the micro-nano aeration unit. A microbial flocculant inlet 103 is arranged at the rear end of the gas source inlet 102. The bubbles generated by the gas source fully mix the microbial flocculant with the microalgae and suspended substances in the aquaculture wastewater, coagulate small molecules and macromolecules into larger mixtures, which can be quickly filtered by the microfiltration sedimentation tank later, removing both algae and phosphorus; at the same time, the bubbles are released in the sewage, and the oxygen in the air dissolves in the sewage, increasing the dissolved oxygen concentration in the sewage, reducing the air pump power of the subsequent micro-nano aeration tank, and reducing energy consumption. In one embodiment, by designing a floating sludge baffle (not shown in the figure) upstream of the first outlet 104, the effluent does not carry floating sludge, enhancing the effluent water quality. The collected flocculated sludge deposits at the bottom and is discharged through the sludge outlet, that is, the second outlet 108.

[0033] The main components of the microbial flocculant can be selected from spirulina, chlorella, protamine, organic polyacrylamide, etc.

[0034] The micro-nano aeration unit fills the inflowing tail water with micro-nano bubbles to accelerate the degradation of pollutants. As Figure 1As shown, the effluent from the dialysis separation unit is introduced into the micro-nano aeration unit. The micro-nano aeration unit is a micro-nano bubble generator that uses high-pressure gas to pass through a fine nozzle or microporous plate to generate micro-nano scale bubbles. Since micro-nano bubbles have a larger specific surface area and a longer residence time than ordinary bubbles, the double electric layer structure of micro-nano bubbles can resist gas diffusion, reducing the dissolution rate of bubbles. At the same time, when micro-nano bubbles shrink and burst, the violent changes caused by the disappearance of the gas-liquid interface will release the energy accumulated by the high-concentration positive and negative ions on the interface, thereby generating a large amount of hydroxyl radicals. The strong oxidizing property of hydroxyl radicals can degrade the refractory pollutants in water. By injecting micro-nano bubbles into the micro-nano aeration unit, reactive oxygen species are continuously replenished into the water as the dissolved oxygen in the bubbles is consumed, which can enhance the biological activity of aerobic microorganisms in the water and accelerate the biodegradation of the pollutants difficult to be removed in the effluent of the dialysis separation unit, achieving the purpose of water purification.

[0035] As Figure 1 shown, in an alternative embodiment, the dialysis separation unit includes a micro-power mixing module 1, a microfiltration precipitation module 2, a clarified effluent module, and an adsorption packing module 3. The first outlet 104 of the micro-power mixing module is first connected to the inlet of the clarified effluent module to collect the preliminarily treated tail water, so that the tail water after further removing solid organic matter enters the micro-nano aeration unit for further treatment, which can improve the treatment efficiency of the micro-nano aeration unit. The clarified effluent module can use sedimentation or filtration equipment, etc. to clarify the tail water, such as using a gravity sedimentation tank or a lamella sedimentation tank for sedimentation. The first outlet of the clarified effluent module is used to discharge the tail water and is connected to the micro-nano aeration unit, and the second outlet of the clarified effluent module is used to discharge the sediment and is connected to the adsorption packing module. The flocculent sludge and other sediments discharged from the second outlet 108 of the micro-power mixing module enter the microfiltration precipitation module to precipitate solid organic matter, so that feces and residual bait, etc. are fully treated. Specifically, the microfiltration precipitation module can select a membrane bioreactor (MBR) system. The sediment after being treated by the microfiltration precipitation module is discharged into the concentrate collection module, and the tail water can be discharged into the clarified effluent module or enter the micro-nano aeration unit for further treatment.

[0036] In an alternative embodiment, the sediment treated by the microfiltration precipitation module enters the adsorption packing module for further adsorption treatment and then is discharged into the concentrate collection module. The adsorption packing module can select a fixed-bed adsorption tank, and the packing can be zeolite, diatomite, resin, etc. to further adsorb organic matter, phosphorus, etc. The outlet of the adsorption packing module is connected to the concentrate collection module, such as a sludge pipeline, so that the pollutants treated by the dialysis separation unit are collected and discharged.

[0037] In an alternative embodiment, a suspended packing carrier is arranged in the micro-nano aeration unit to promote the survival of microorganisms. A suspended packing carrier, such as activated carbon, is arranged in the micro-nano aeration unit. Micro-nano bubbles are used to create an excellent living environment for microorganisms, enabling the enrichment of microorganisms and accelerating the decomposition and utilization of ammonia nitrogen and organic matter in the water body, thereby removing chemical oxygen demand, ammonia nitrogen, and total nitrogen in the water body.

[0038] In an alternative embodiment, the outlet of the micro-nano aeration unit is connected to the inlet of the tail water discharge module; the outlet of the tail water discharge module is connected to the aquaculture functional subsystem and / or connected to the external river channel to recycle the up-to-standard tail water or directly discharge it. As Figure 1 shown, the tail water treated by the micro-nano aeration unit can be collected in the tail water discharge module through drainage channels, etc.; the tail water collected here has been fully treated and meets the safety discharge standard.

[0039] It can be seen that the tail water treatment of the present disclosure is mainly divided into two steps. The first step is to use the dialysis separation unit to remove solid pollutants such as feces and residual bait in the water body, and then introduce the tail water treated by the dialysis separation unit into the micro-nano aeration unit to make full use of micro-nano bubbles to accelerate the biodegradation of pollutants.

[0040] Of course, during the long-term use process, bottom mud is generated in the water body of the tail water discharge module due to natural sedimentation. The bottom mud can be discharged to the micro-power mixing module for further treatment. It can be seen that pollutants such as feces and sewage in the aquaculture pond are effectively collected in the system, and the sludge cleaning method is convenient and fast without the need for dredging work in a large area. The quality of aquaculture tail water discharge is improved, and the total amount of aquaculture tail water discharge is reduced.

[0041] Compared with the existing technology using mixing equipment, the micro-power mixing module of the present disclosure has less energy consumption and a high reduction efficiency of solid pollutants. For specific comparison experiments, see Table 1 below.

[0042] The initial suspended solid concentration C0 is selected to be 190mg / L - 400mg / L, and the micro-power mixing module of the present disclosure is compared with multiple groups of mixing equipment. In order to further illustrate the flocculation effect of the micro-power mixing module of the present invention, a blank experimental group is also compared here. The specific comparison objects include 3 types: blank control, micro-pore aeration, and mixing stirrer. During the experiment, the same concentration and the same type of flocculant are used. Here, spirulina flocculant is used. Among them, the concentration of spirulina flocculant can be in the range of 0.5 - 100ppm. The experimental results are shown in Table 1:

[0043] Table 1 Comparison of sewage treatment results of different mixing equipment

[0044] Initial suspended solid concentration C0 Effluent suspended solid concentration Ci Reduction rate Wi Blank control 311 255 18％ Micro-power mixing module 356 11 97％ Micro-pore aeration 300 55 82％ Mixing agitator 260 8 97％

[0045] As can be seen from Table 1, compared with the blank control group, the experimental groups using the micro-power mixing module provided by the present invention all have a better solid pollutant reduction rate. Although the treatment efficiencies of the micro-power mixing module and the mixing agitator disclosed in the present disclosure are relatively close and both have good reduction effects, the influent pollutant concentration of the micro-power mixing module disclosed in the present disclosure is the highest, reaching 356 mg / L, which is much higher than the sewage concentration treated by the mixing agitator. And the two groups used the same type and concentration of flocculant. Through conversion, it can be found that for the scenario with the same initial suspended solid concentration, the amount of flocculant consumed by the micro-power mixing module disclosed in the present disclosure is lower than that of the mixing agitator. Therefore, it can be seen that the micro-power mixing module disclosed in the present disclosure has the best sewage treatment effect and less flocculant consumption. Moreover, the micro-power mixing module disclosed in the present disclosure does not require additional energy consumption, and its energy consumption rate is much smaller than that of the mixing equipment such as the mixing agitator.

[0046] In an optional embodiment, the aquaculture system further includes an aquaculture functional subsystem, and the area ratio of the aquaculture functional subsystem to the tail water treatment subsystem is 100:1 to 120:1. The present invention effectively reduces the land use ratio of the tail water treatment part in the aquaculture system by constructing a dialysis separation unit and a micro-nano aeration unit. In one embodiment, the area ratio of the aquaculture functional unit to the aquaculture tail water treatment system is 100-120:1. The floor area of the aquaculture tail water treatment facility is greatly reduced compared with the prior art, that is, 91% of the construction area can be saved compared with the prior art.

[0047] Through experimental determination, the tail water treatment subsystem of the present invention can achieve the following treatment and filtration effects: when the suspended solids in the aquaculture tail water are (200±29) mg / L at the inlet, the suspended solids concentration at the outlet is (34±19) mg / L, and the reduction rate of suspended solids is about 83%; the permanganate index at the inlet is (32±3) mg / L, and the permanganate index at the outlet is (13±4) mg / L, with a reduction rate of about 59%; the total nitrogen at the inlet is (3.44±0.37) mg / L, and the total nitrogen at the outlet is (2.96±0.55) mg / L, with a reduction rate of about 14%; the ammonia nitrogen at the inlet is (1.75±1.2) mg / L, and the ammonia nitrogen at the outlet is (0.73±0.22) mg / L, with a reduction rate of about 58%; the total phosphorus at the inlet is (0.46±0.06) mg / L, and the total phosphorus at the outlet is (0.29±0.1) mg / L, with a reduction rate of about 37%. It can be seen that the present disclosure can effectively remove pollutants such as suspended solids, ammonia nitrogen, and phosphorus in the water body, and the overall removal rates of common pollutant indicators such as suspended solids and permanganate index in the tail water are high. When the inlet concentration of suspended solids is in the range of 400-500 mg / L, the outlet is about less than 50 mg / L, which is controlled within the first-class standard of "Discharge Requirements for Freshwater Pond Aquaculture Water" (SC / T 9101-2007); when the inlet concentration of permanganate index is in the range of 30-40 mg / L, the outlet is about less than 15 mg / L, which is controlled within the first-class standard of "Discharge Requirements for Freshwater Pond Aquaculture Water" (SC / T 9101-2007); therefore, the present system can be applied to the treatment of aquaculture tail water of various aquatic products, such as the treatment of pond aquaculture tail water of varieties (categories) such as freshwater fish, white shrimp, and Chinese mitten crabs.

[0048] Exemplarily, the load of the aquaculture pond of the present invention can be: 300-400 soft-shelled turtles per mu or 900-1200 fish per mu. During the management of water inlet and drainage, the drainage interval period of the aquaculture pond is 5 to 30 days or calculated according to the actual aquaculture species. The drainage time period is from 4 to 5 pm to 8 to 9 am the next day. When draining water, the water inlet of the water inlet channel and all other water inlets of the aquaculture ponds connected to the water inlet channel are closed. The discharged tail water flows into the aquaculture tail water treatment subsystem through the water inlet channel. The maximum drainage load is calculated according to the area of the aquaculture area; the water inlet time period is after the drainage is completed until the original water level of the aquaculture pond is reached. When filling water, the water inlet of the aquaculture tail water treatment system is closed.

[0049] The above specific embodiments do not constitute a limitation on the scope of protection of the present disclosure. Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the technical solutions disclosed in this application. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0050] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A dialysis system for treating aquaculture tail water, comprising a tail water treatment subsystem, and the tail water treatment subsystem includes a dialysis separation unit and a micro-nano aeration unit; characterized in that: The dialysis separation unit is used to remove solid pollutants in the water body; The micro-nano aeration unit is used to accelerate the biodegradation of the tail water after being treated by the dialysis analysis unit; Among them, the dialysis separation unit includes a micro-power mixing module and a microfiltration precipitation module, and the micro-power mixing module and the microfiltration precipitation module are jointly used to separate solid organic matter in the tail water; the inlet of the micro-power mixing module is connected to the inlet tail water collection module; The micro-nano aeration unit is connected to the outlet of the micro-power mixing module, and the microfiltration precipitation module is connected to the sludge outlet of the micro-power mixing module; The micro-nano aeration unit fills the tail water flowing into it with micro-nano bubbles to accelerate pollutant degradation.

2. The tail water treatment dialysis system according to claim 1, characterized in that The micro-power mixing module is provided with an inlet, a gas source inlet and a microbial flocculant inlet. Among them, the gas source inlet is used to inflate the tail water flowing through the inlet; the microbial flocculant inlet is arranged downstream of the gas source inlet, and the microbial flocculant inlet is used to add microbial flocculant to the inflated tail water.

3. The tail water treatment dialysis system according to claim 1, characterized in that The micro-nano aeration unit is provided with a suspended packing carrier to promote the survival of microorganisms.

4. The tail water treatment dialysis system according to claim 1, characterized in that The micro-power mixing module includes a main body part, and a first outlet is arranged at the upper part of the side wall of the main body part, and a floating sludge baffle is arranged upstream of the first outlet.

5. The tail water treatment dialysis system according to any one of claims 1-4, characterized in that, The dialysis separation unit further includes a clarified water outlet module and an adsorption packing module. The outlet of the micro-power mixing module is first connected to the inlet of the clarified water outlet module, the outlet of the clarified water outlet module is then connected to the micro-nano aeration unit, the sludge outlet of the clarified water outlet module is connected to the inlet of the adsorption packing module, and the sludge outlet of the microfiltration precipitation module is connected to the inlet of the adsorption packing module.

6. The tail water treatment dialysis system according to claim 1, characterized in that The sludge outlet of the microfiltration precipitation module is connected to the inlet of the concentrated liquid collection module.

7. The tail water treatment dialysis system according to claim 5, characterized in that, The sludge outlet of the adsorption packing module is connected to the inlet of the concentrated liquid collection module.

8. The tail water treatment dialysis system according to claim 1, characterized in that The tail water treatment dialysis system further includes a tail water discharge module and an aquaculture function subsystem; the outlet of the micro-nano aeration unit is connected to the inlet of the tail water discharge module; the outlet of the aquaculture function subsystem is connected to the inlet of the micro-power mixing module.

9. The tail water treatment dialysis system according to claim 8, characterized in that, The first outlet of the tail water discharge module is connected to the aquaculture function subsystem, and the second outlet of the tail water discharge module is connected to the external river channel.

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