Disinfection by-product removal device and method and application

Abstract

According to the device and method for removing the disinfection by-products and the application, the micro-bubble generation system is used for pressurizing and mixing the supernate in the reaction tank and ozone to generate micro-bubble ozone, the gas-liquid mixture mixed with the micro-bubble ozone flows back to the reaction tank, the micro-bubble ozone is continuously provided for the reaction tank, the utilization rate of the ozone is increased, and the disinfection by-products are removed. And the dosage of ozone is correspondingly reduced. Meanwhile, by adjusting the mass concentration of the added ozone, adding hydrogen peroxide into the reaction tank and arranging a stirrer in the reaction tank, micro-nano ozone bubbles, hydrogen peroxide and sewage are fully mixed, microorganisms and disinfection by-products in the sewage are removed, the use of a disinfectant is reduced from the source, and the pollution to the environment is reduced. The removal force of the disinfection by-products is enhanced from the tail end, and the removal effect of typical disinfection by-products is improved. In addition, hydrogen peroxide is added, so that the rate of eliminating disinfection by-products by micro-nano ozone bubbles can be increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of water treatment, and in particular relates to a device, method and application for removing disinfection by-products. Background Art

[0002] In livestock and poultry farms and aquaculture farms, the use of disinfectants is essential to effectively control the number of disease pathogens and cut off their transmission routes. Disinfectants provide necessary sanitation protection for the breeding environment by killing or inhibiting the growth of pathogenic microorganisms. However, the impact of disinfection by-products produced during the use of disinfectants in livestock and poultry farms and aquaculture farms on the environment cannot be underestimated.

[0003] Disinfection byproducts, as products of the reaction between disinfectants and target pollutants, have concentration characteristics in water bodies that cannot be ignored. In particular, when povidone-iodine is used as a disinfectant, the concentration of methyl iodide in livestock and poultry manure can reach up to tens of micrograms per liter (μg / L), while nanograms per liter (ng / L) of iodoacetic acid can be detected in fish ponds. These disinfection byproducts not only pollute the environment, but more importantly, their cytotoxicity and genotoxicity pose a potential threat to human health.

[0004] To address this problem, existing methods for removing disinfection byproducts include air stripping, adsorption, membrane separation, biodegradation and reduction. However, these methods are not widely used in the treatment of disinfection byproducts in aquaculture, and each has certain limitations. For example, although the air stripping method is easy to operate, it has limited efficiency in removing non-volatile pollutants; the adsorption method requires regular replacement of adsorption materials, which is costly; and the membrane separation method faces problems such as membrane pollution and membrane life.

[0005] As a strong oxidant, ozone can be dissolved in water and enter the cells of bacteria to oxidize the organic matter in the cells, thereby achieving the purpose of sterilization and disinfection. However, the ozone oxidation technology currently used still has some problems in the treatment of disinfection by-products in the aquaculture industry. The main ozone addition methods include ordinary aeration plates, microporous aeration plates and jets, but these methods have the disadvantages of high ozone loss rate, large dosage and high cost. This not only increases the operating costs of the farm, but may also cause secondary pollution to the environment. Summary of the invention

[0006] In order to address the deficiencies of the prior art, the present application provides a device, method and application for removing disinfection by-products, so as to reduce the pollution of disinfection by-products to the environment and promote the sustainable development of the aquaculture industry.

[0007] One aspect of the present application is to provide a device for removing disinfection byproducts, comprising:

[0008] A regulating tank is used to settle particles in sewage, and a grille is connected to the inlet thereof, and a submersible pump is connected to the front end of the grille, and the submersible pump is used to obtain sewage to be treated;

[0009] The reaction tank is equipped with a stirrer, and the sewage after settling in the regulating tank enters the reaction tank to react with micro-nano ozone bubbles and hydrogen peroxide (H2O2);

[0010] an ozone generator, connected to the microbubble generating system, and used to provide ozone to the microbubble generating system;

[0011] A microbubble generating system, one end of which is connected to the ozone generator and the other end of which is connected to the reaction tank, wherein the microbubble generating system comprises an air dissolving pump, and the air dissolving pump pressurizes and mixes the supernatant from the reaction tank and the ozone from the ozone generator to obtain a gas-liquid mixture containing micro-nano ozone bubbles;

[0012] The hydrogen peroxide supply system is connected to the reaction tank and includes a dosing pump and a H2O2 storage tank.

[0013] Preferably, the average particle size of the micro-nano ozone bubbles is 151.1±7.4 nm, the particle size mode is 107.8±3.9 nm, and the standard deviation is 62.8±4.2 nm.

[0014] Preferably, the microbubble generating system further comprises a gas-liquid releaser for releasing the pressure of the gas-liquid mixture containing micro-nano ozone bubbles to make the micro-nano ozone bubbles evenly distributed in the reaction tank. One end of the gas-liquid releaser is connected to the air dissolving pump, and the other end is connected to the reaction tank.

[0015] Preferably, a check valve is provided between the air dissolving pump and the gas-liquid releaser, and the check valve is used to prevent the gas-liquid mixture from flowing back.

[0016] Preferably, a ball valve, a flow meter and a vacuum pressure gauge are also provided between the gas-liquid releaser and the reaction tank to adjust the release pressure and flow of the ozone micro-nano bubbles.

[0017] Preferably, the grid connected to the inlet of the regulating tank is a fine grid with a gap of 1-15mm, preferably a fine grid with a gap of 3-12mm, and more preferably a fine grid with a gap of 5-10mm, which is used to remove larger impurities such as branches, snails, and stones in the water pumped out by the submersible pump.

[0018] Preferably, a ball valve is also provided in the connection pipe between the reaction pool and the microbubble generating system near the reaction pool.

[0019] More preferably, a vacuum pressure gauge is provided on the connection pipe between the reaction pool and the microbubble generating system near the ozone generating system.

[0020] Preferably, a solenoid valve, a vacuum pressure gauge and a flow meter are provided between the ozone generator and the microbubble generating system for adjusting the amount of ozone added.

[0021] Preferably, the ozone generator is connected to an oxygen production system to obtain an oxygen source.

[0022] Preferably, the ozone generator adopts a corona discharge method to generate ozone using high-frequency discharge, and the function is switched by adjusting the power percentage, thereby changing the mass concentration of the added ozone.

[0023] Preferably, the oxygen production system produces oxygen by pressure swing adsorption, using the principle of pressure adsorption and pressure reduction analysis to adsorb and release oxygen from the air, thereby obtaining oxygen with a concentration of about 90-95%.

[0024] Preferably, a three-way valve is provided between the micro-nano ozone bubble generating system and the reaction tank. When micro-nano ozone bubbles are required to directly disinfect the sewage water body, the three-way valve can be adjusted to allow the micro-nano ozone bubbles to be directly discharged into the water body through the disinfection pipe.

[0025] A second aspect of the present invention provides a method for removing disinfection by-products, comprising the steps of:

[0026] Provide a device as described above in this application;

[0027] The sewage to be treated is pumped out by a submersible pump, and after impurities in the sewage are removed by a fine screen, it enters the regulating tank for sedimentation to obtain the settled sewage;

[0028] Starting the oxygen production system, the ozone generator, and the micro-nano ozone bubble generation system, mixing the ozone and the supernatant of the reaction tank through the dissolved air pump to obtain a gas-liquid mixture containing micro-nano ozone bubbles, and the gas-liquid mixture enters the reaction tank after being depressurized by the gas-liquid releaser;

[0029] Start the agitator in the reaction tank, start the dosing pump at the same time, add hydrogen peroxide solution into the reaction tank, and the settled sewage reacts with micro-nano ozone bubbles and hydrogen peroxide in the reaction tank to remove disinfection by-products to obtain the final treated water.

[0030] Preferably, the gas-liquid mixture containing micro-nano ozone bubbles enters the reaction tank through the bottom of the reaction tank, thereby prolonging the rising time of the micro-nano ozone bubbles.

[0031] Preferably, the final treated water is discharged from the outlet pipe at the bottom of the reaction tank.

[0032] Preferably, the working steps of the dissolved air pump to generate micro-nano ozone bubbles include:

[0033] The supernatant of the sewage in the reaction tank is mixed with ozone molecules through an air dissolving pump to obtain a gas-liquid mixture containing micro-nano ozone bubbles. The gas-liquid mixture containing micro-nano ozone bubbles is returned to the reaction tank through a reflux pipe after the pressure is released by a gas-liquid releaser, and micro-nano ozone bubbles are continuously provided to the reaction tank.

[0034] Preferably, by adjusting the mass concentration of ozone added by the ozone generator, the gas-liquid mixture mixed with micro-nano ozone bubbles is discharged into the sewage water body to be treated through the disinfection pipe, so as to achieve the purpose of direct water disinfection, thereby reducing the use of disinfectants (povidone iodine) and realizing source control of disinfectants.

[0035] Preferably, the mass concentration of ozone added in the reaction tank is 0.1-3 mg / L, preferably 0.2-2 mg / L, more preferably 0.3-1 mg / L. Preferably, the mass ratio of ozone (micro-nano ozone bubbles) to hydrogen peroxide is 1:(0.3-1.5), preferably 1:(0.5-1.2), more preferably 1:(0.7-1).

[0036] Preferably, the rotation speed of the agitator in the reaction tank is maintained at 100-800 rpm, preferably 200-600 rpm, more preferably 300-500 rpm.

[0037] Preferably, the typical disinfection byproducts include: one or more combinations of halogenated methane, halogenated acetic acid, and halogenated acetonitrile. For example, the typical disinfection byproducts can be one or more combinations selected from triiodomethane, diiodoacetic acid, dichloromethane, trichloromethane (chloroform), carbon tetrachloride, dibromoacetic acid, dichloroacetic acid, trichloroacetonitrile, tribromoacetonitrile, bromochloroacetonitrile, and monobromodichloroacetonitrile.

[0038] Preferably, the reaction time of the settled sewage in the reaction tank is 5-50 minutes, preferably 8-40 minutes, and more preferably 10-30 minutes.

[0039] The third aspect of the present invention provides an application of a device for removing disinfection by-products.

[0040] Preferably, the device can be used for disinfection of aquaculture water.

[0041] Preferably, the device can be used for disinfection of drinking water.

[0042] Preferably, the device can be used for disinfection of industrial wastewater.

[0043] Preferably, the device can be used for disinfection of domestic sewage water bodies.

[0044] In this application specification, micro-nano ozone bubbles are ozone molecules using nanobubbles as carriers, in order to improve the mass transfer coefficient and utilization rate of ozone, and improve the oxidation and disinfection effect of ozone.

[0045] In this application specification, the generation of micro-nano bubbles requires that air be dissolved in water using pressure through an air dissolving pump, and the gas-liquid mixture is then depressurized by a gas-liquid releaser before entering the reactor, so that the microbubbles are evenly distributed in the reactor; in simple terms, the air dissolving pump is used for pressurization and the gas-liquid releaser is used for depressurization.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] The present application provides a device, method and application for removing disinfection byproducts, which utilizes a microbubble generating system to pressurize and mix the supernatant in the reaction tank with ozone to generate microbubble ozone, and reflux the gas-liquid mixture mixed with microbubble ozone to the reaction tank, continuously providing microbubble ozone to the reaction tank, improving the utilization rate of ozone, and correspondingly reducing the amount of ozone added. At the same time, the present application fully mixes micro-nano ozone bubbles, hydrogen peroxide and sewage by adjusting the mass concentration of ozone added, adding hydrogen peroxide to the reaction tank, and setting an agitator in the reaction tank, removes microorganisms and disinfection byproducts from the sewage, reduces the use of disinfectants from the source, strengthens the removal of disinfection byproducts from the end, and improves the removal effect of typical disinfection byproducts. In addition, the addition of hydrogen peroxide can also increase the rate at which micro-nano ozone bubbles eliminate disinfection byproducts. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a system structure diagram of Example 1 of the present invention.

[0049] Figure 2 This is a flow chart of the steps of working of the device of Example 1 of the present invention.

[0050] Figure 3 It is a schematic diagram of the removal effect of the device in Example 2 of the present invention and Comparative Examples 1-2.

[0051] Figure 4 Schematic diagram of the microbial disinfection effect of Example 2 of the present invention.

[0052] The following are the descriptions of the reference numerals:

[0053] 1. Submersible pump; 2. Inlet connection grid; 3. Regulating tank; 4. Reaction tank; 5. Ball valve; 6. Vacuum pressure gauge; 7. Ozone generator; 8. Oxygen production system; 9. Solenoid valve; 10. Flow meter; 11. Dissolved air pump; 12. Check valve; 13. Gas-liquid releaser; 14. Microbubble generating system; 15. Gate valve; 16. Sludge pipe; 17. Drain pipe; 18. Hydrogen peroxide storage tank; 19. Dosing pump; 20. Agitator. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "side", "up", "down", "top", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0056] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Embodiment 1:

[0058] like Figure 1 As shown, this embodiment provides a device for removing disinfection byproducts, which is used to remove disinfection byproducts (including triiodomethane and diiodoacetic acid) in water bodies around aquaculture or aquaculture ponds (pH 7-10), and the device includes:

[0059] The submersible pump 1 pumps the sewage to be treated into the regulating tank 3.

[0060] The regulating tank 3 has a grille 2 at its entrance to remove large impurities such as branches, snails, and stones in the water body pumped out by the submersible pump 1 to prevent the impurities from blocking the pipeline. The regulating tank 3 settles the sewage to be treated to obtain the settled sewage.

[0061] One end of the reaction tank 4 is connected to the regulating tank 3, and the settled sewage enters the reaction tank 4. An agitator 20 is provided in the reaction tank 4.

[0062] The microbubble generating system 14 is connected to the reaction pool 4 through a pipeline at one end, and comprises an air dissolving pump 11 and a gas-liquid mixer 13. One end of the air dissolving pump 11 is connected to the ozone generator 7, and the other end is connected to the reaction pool 4, so as to fully mix the supernatant from the reaction pool 4 and the ozone from the ozone generator 7 to obtain a gas-liquid mixture containing micro-nano ozone bubbles.

[0063] Specifically, the strong oxidizing property of micro-nano ozone bubbles can remove the disinfection byproducts in sewage, namely triiodomethane and diiodoacetic acid, wherein triiodomethane is a volatile gas and can be removed by stripping with micro-nano ozone bubbles and agitator 20. The supernatant in the reaction tank 4 flows into the microbubble generating system 14 through a pipeline, so that O3 is fully mixed with the supernatant from the reaction tank 4 to generate microbubble ozone and then flows back to the reaction tank 4. After sufficient reaction, the treated tail water in the reaction tank 4 is discharged into the surrounding water body of the aquaculture industry or aquaculture pond through the drain pipe 17, and the solid precipitation in the regulating tank 3 is transported out together with the impurities in the grid 2 through the sludge pipe 16 for treatment.

[0064] The gas-liquid mixture containing micro-nano ozone bubbles obtained by the air dissolving pump is depressurized by the gas-liquid releaser 13 , and the gas-liquid mixture flows into the bottom of the reaction tank 4 and flows out from the top, which is beneficial to the homogenization of the reaction system in the reaction tank 4 .

[0065] A check valve 12 is provided between the air dissolving pump 11 and the gas-liquid releaser 13, and the check valve 12 is used to prevent the gas-liquid mixture from flowing back.

[0066] A ball valve 5, a flow meter 10 and a vacuum pressure gauge 6 are provided between the gas-liquid releaser 13 and the reaction tank 4 to adjust the release pressure and flow of the ozone micro-nano bubbles.

[0067] The hydrogen peroxide supply system includes a dosing pump 19 and an H2O2 storage tank 18, and H2O2 is added to the reaction tank 4 to promote the generation of hydroxyl radicals by contacting hydrogen peroxide (H2O2) with ozone. This is because there is a synergistic mechanism between H2O2 and O3, and an appropriate amount of H2O2 can promote the generation of hydroxyl radicals (·OH) during the oxidation process. ·OH has a higher redox potential than O3 and has no selectivity for the oxidation of pollutants, so the microbubble O3 / H2O2 system has a stronger oxidation ability and a better removal effect on microorganisms and disinfection by-products in wastewater (such as Figure 2 , Figure 3 shown).

[0068] The ozone generator 7 is connected to the oxygen production system 8 to obtain an oxygen source. The ozone generator 7 adopts a corona discharge method, and the mass concentration of the added ozone can be changed by adjusting the power percentage. The oxygen production system 8 adopts a pressure swing adsorption method to produce oxygen, and uses the principle of pressurized adsorption and reduced pressure analysis to adsorb and release oxygen from the air, and the obtained oxygen concentration is about 90-95%.

[0069] Embodiment 2:

[0070] This embodiment provides a method for removing disinfection byproducts based on the device described in Embodiment 1, the steps comprising:

[0071] The submersible pump is submerged in the fish pond (the concentration of disinfection byproducts in the water is 100 μg / L) at a depth of about 1.5 m. The water from the fish pond is connected to the regulating tank 3 through the submersible pump and the screen to remove larger impurities such as branches, snails, and stones. After settling in the regulating tank 3 for 30 minutes, the settled sewage is obtained and connected to the reaction tank 4.

[0072] Start the oxygen production system 8 and the ozone generator 7, and set the oxygen production machine related parameters of the oxygen production system 8: adjust the power percentage of the oxygen production machine to 10%, adjust the outlet pressure to 0.08 MPa, and adjust the outlet flow rate to 20 L / Min.

[0073] Set the relevant parameters of the dissolved air pump 11, adjust the mass concentration of ozone added by the ozone generator to 1 mg / L, adjust the flow of the dissolved air pump 11 to about 600 L / h by adjusting the ball valve 5, the air intake volume is 10-30 L / h, and the pipeline pressure is 0.3-0.4 MPa.

[0074] At the same time, the dosing pump 19 is started to add hydrogen peroxide solution into the reaction tank 4, and the mass ratio of the added hydrogen peroxide to ozone is 0.7:1. The agitator 20 is started, and the settled sewage enters the micro-nano bubble generation system 14 from the reaction tank 4, and is pressurized and mixed with ozone by the air dissolving pump 11 to obtain a gas-liquid mixture containing micro-nano ozone bubbles, and the gas-liquid mixture flows back to the reaction tank 4. At this time, the sewage reacts with the micro-nano ozone bubbles and hydrogen peroxide to remove microorganisms and disinfection by-products. The reaction time is controlled at 30 minutes to obtain the final treated water, which is discharged from the outlet pipe at the bottom of the reaction tank.

[0075] Characterize the removal effect of the final treated water: Figure 3 It can be seen that within 5 minutes, the removal rate of triiodomethane in sewage is >80%, and the removal rate of diiodoacetic acid is >60%. Figure 4 It can be seen that the removal rates of total coliform group, fecal coliform group and total number of colonies in the sewage in this embodiment are as high as 99%.

[0076] Comparative Example 1:

[0077] This comparative example provides a method for removing disinfection by-products based on the device described in Example 1, the steps do not include adding hydrogen peroxide into the reaction tank, and the remaining method steps are consistent with Example 2.

[0078] like Figure 3 As shown in the figure, without adding hydrogen peroxide, the removal efficiency of disinfection by-products is significantly reduced, and the removal effect is also significantly reduced. The removal rate of triiodomethane in 30 minutes does not exceed 70%, and the removal rate of diiodoacetic acid does not exceed 60%. Figure 3 From the slope, the removal efficiency is also significantly reduced without adding hydrogen peroxide. Adding hydrogen peroxide can increase the disinfection rate of micro-nano ozone bubbles.

[0079] Comparative Example 2:

[0080] This comparative example provides a method for removing disinfection by-products based on the device described in Example 1, the steps do not include adding hydrogen peroxide to the reaction tank, and compared with Comparative Example 1, the amount of ozone added is only one tenth of that in Comparative Example 1 (the mass concentration of ozone added by the ozone generator is 0.1 mg / L), and the remaining method steps are consistent with Example 2.

[0081] like Figure 3 As shown, without adding hydrogen peroxide and reducing the amount of ozone, the removal efficiency (removal rate / time) of disinfection by-products is lower than that of Comparative Example 1, and the removal effect is significantly reduced. The removal rate of triiodomethane in 30 minutes does not exceed 30%, and the removal rate of diiodoacetic acid does not exceed 20%.

[0082] The specific embodiments of the present application are described in detail above, but they are only examples, and the present application is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions made to the present application are also within the scope of the present application. Therefore, the equalization changes and modifications made without departing from the spirit and scope of the present application should be included in the scope of the present application.

Claims

1. A device for removing disinfection byproducts, comprising: A regulating tank is used to settle particles in sewage, and a grille is connected to the inlet thereof, and a submersible pump is connected to the front end of the grille, and the submersible pump is used to obtain sewage to be treated; The reaction tank is equipped with a stirrer, and the sewage after settling in the regulating tank enters the reaction tank to react with micro-nano ozone bubbles and hydrogen peroxide (H2O2); an ozone generator, connected to the microbubble generating system, and used to provide ozone to the microbubble generating system; A microbubble generating system, one end of which is connected to the ozone generator and the other end of which is connected to the reaction tank, wherein the microbubble generating system comprises an air dissolving pump, and the air dissolving pump pressurizes and mixes the supernatant from the reaction tank and the ozone from the ozone generator to obtain a gas-liquid mixture containing micro-nano ozone bubbles; The hydrogen peroxide supply system is connected to the reaction tank and includes a dosing pump and a H2O2 storage tank.

2. The device according to claim 1, characterized in that The microbubble generating system also includes a gas-liquid releaser, one end of which is connected to the air dissolving pump, and the other end is connected to the reaction pool.

3. The device according to claim 1, characterized in that A check valve is provided between the air dissolving pump and the gas-liquid releaser; and / or A ball valve, a flow meter and a vacuum pressure gauge are also provided between the gas-liquid releaser and the reaction tank; and / or A ball valve is arranged on the connection pipe between the reaction pool and the microbubble generating system near the reaction pool.

4. The device according to claim 1, characterized in that The grid connected to the inlet of the regulating tank is a fine grid with a gap of 1-15 mm, preferably a fine grid with a gap of 3-12 mm, and more preferably a fine grid with a gap of 5-10 mm.

5. A method for removing disinfection byproducts, based on the device according to any one of claims 1 to 4, comprising: The sewage to be treated is pumped out by a submersible pump, and after impurities in the sewage are removed by a fine screen, it enters the regulating tank for sedimentation to obtain the settled sewage; Starting the oxygen production system, the ozone generator, and the micro-nano ozone bubble generation system, mixing the ozone and the supernatant of the reaction tank through the dissolved air pump to obtain a gas-liquid mixture containing micro-nano ozone bubbles, and the gas-liquid mixture enters the reaction tank after being depressurized by the gas-liquid releaser; Start the agitator in the reaction tank, start the dosing pump at the same time, add hydrogen peroxide solution into the reaction tank, and the settled sewage reacts with micro-nano ozone bubbles and hydrogen peroxide in the reaction tank to remove disinfection by-products to obtain the final treated water.

6. The method according to claim 5, characterized in that The gas-liquid mixture containing micro-nano ozone bubbles enters the reaction tank through the bottom of the reaction tank.

7. The method according to claim 5, characterized in that The working steps of the dissolved air pump to generate micro-nano ozone bubbles include: The sewage supernatant in the reaction tank is mixed with ozone molecules through an air dissolving pump to generate micro-nano ozone bubbles, and the gas-liquid mixture containing the micro-nano ozone bubbles is released through a gas-liquid releaser and then returned to the reaction tank through a reflux pipe.

8. The method according to claim 5, characterized in that The mass concentration of ozone added by the ozone generator is adjusted, and the supernatant mixed with micro-nano ozone bubbles and ozone molecules is discharged into the sewage water body to be treated through the disinfection pipe.

9. The method according to claim 5, characterized in that The mass concentration of ozone added in the reaction tank is 0.1-3 mg / L, preferably 0.2-2 mg / L, more preferably 0.3-1 mg / L; and / or The mass ratio of ozone to hydrogen peroxide is 1:(0.3-1.5), preferably 1:(0.5-1.2), and more preferably 1:(0.7-1).

10. Application of a disinfection by-product removal device, based on the device according to any one of claims 1 to 4, characterized in that: The device can be used for disinfecting water bodies in aquaculture.

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