Integrated biological aerated filter-catalytic ozonation device

Abstract

The utility model discloses an integrated biological aerated filter-catalytic ozonation device which comprises a device wall, a biological aerated filter is arranged on the device wall, a catalytic ozonation area is arranged on the device wall, the catalytic ozonation area is arranged above the biological aerated filter, a filter plate is arranged in the device wall, and the filter plate is arranged above the biological aerated filter. An effluent weir is arranged at the top of the device wall. According to the integrated biological aerated filter-ozone catalytic oxidation device, ozone is placed in the biological aerated filter after being subjected to catalytic oxidation, so that the disinfection effect of effluent of the biological aerated filter is improved, and the possibility that the effluent of the integrated biological aerated filter-ozone catalytic oxidation device is used for factory-like circulating aquaculture is further enhanced; hydrogen peroxide is adopted to catalyze ozone oxidation, no anion and cation residues exist after use, and the possibility that the effluent of the integrated biological aerated filter-ozone catalytic oxidation device is used for factory-like circulating aquaculture is improved.

Description

Technical Field

[0001] This utility model relates to the field of aerated biological filter technology, specifically an integrated aerated biological filter-ozone catalytic oxidation device. Background Technology

[0002] The integrated chemical oxidation-aerated biological filter is a wastewater treatment device that combines chemical oxidation and aerated biological filtration into one unit. It is mainly used for the advanced treatment of domestic sewage and industrial wastewater. It combines the advantages of chemical oxidation and aerated biological filtration.

[0003] However, current integrated chemical oxidation-aeration biological filters produce effluent containing a high number of microorganisms, failing to meet the water quality requirements for industrialized recirculating aquaculture systems and thus unsuitable for direct use in such systems. Furthermore, the characteristics of certain chemical oxidants and catalysts, such as the residual anions and cations after use, limit the potential for recirculating the effluent for aquaculture. The low treatment efficiency of the chemical oxidation zone also prevents significant improvements in the overall size of the integrated chemical oxidation-aeration biological filter unit, consequently limiting its footprint and infrastructure investment. Therefore, improvements are necessary. Utility Model Content

[0004] The purpose of this invention is to provide an integrated aerated biological filter-ozone catalytic oxidation device, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an integrated aerated biological filter-ozone catalytic oxidation device, comprising a device wall, an aerated biological filter disposed on the device wall, an ozone catalytic oxidation zone disposed on the device wall above the aerated biological filter, a filter plate disposed inside the device wall, and an outlet weir disposed at the top of the device wall.

[0006] Preferably, the aerated biological filter includes an inlet system, a backwashing system, an aeration system, a support layer, and a filter media layer. The inlet system is equipped with a backwashing system, the aeration system is located inside the device wall and above the filter plate, the support layer is located inside the device wall, and the filter media layer is located on top of the support layer.

[0007] Preferably, the ozone catalytic oxidation zone includes an ozone dosing system, a hydrogen peroxide dosing system, an effluent system, and a backwash drainage system. The ozone dosing system is located inside the device wall and includes a dissolved air pump dosing system. The hydrogen peroxide dosing system is located inside the device wall and above the ozone dosing system. The effluent system is located to the right of the effluent weir, and the backwash drainage system is located to the left of the effluent weir.

[0008] Preferably, the dissolved gas pump dosing system includes a dissolved gas pump, pressure gauges, a flow meter, valves, and a dissolved gas release device. The dissolved gas pump is connected to two pressure gauges via pipelines, and a flow meter is connected to the dissolved gas pump via pipelines. The dissolved gas pump is connected to a dissolved gas water source and an ozone source via pipelines. Valves are installed on the connecting pipelines between the dissolved gas pump and the dissolved gas water source and the ozone source. A dissolved gas release device is connected to the left side of the dissolved gas pump via a pipeline, and a valve is installed on the connecting pipeline between the dissolved gas release device and the dissolved gas pump.

[0009] Preferably, the filter media layer is filled with filter media that serves as a microbial membrane carrier. By designing the filter media layer, the filtration and biodegradation of pollutants in wastewater can be achieved.

[0010] Preferably, there are multiple dissolved gas releasers, which are evenly distributed above the filter media layer. By designing multiple dissolved gas releasers, uniform release of dissolved gas can be achieved.

[0011] Preferably, two flow meters are used, one installed in the dissolved gas water source pipeline and the other in the ozone source pipeline. By designing the flow meters, the flow rates of dissolved gas and ozone can be monitored.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model places ozone catalytic oxidation in an aerated biological filter, which improves the disinfection effect of the effluent from the aerated biological filter and thus enhances the possibility of using the effluent from the integrated aerated biological filter-ozone catalytic oxidation device for factory-scale recirculating aquaculture.

[0014] 2. This utility model uses hydrogen peroxide to catalyze ozone oxidation, leaving no anion or cation residue after use, thus increasing the possibility of using the effluent from the integrated aerated biological filter-ozone catalytic oxidation device for factory-scale recirculating aquaculture.

[0015] 3. The ozone catalytic oxidation system uses a dissolved air pump to add ozone, which improves ozone utilization efficiency and consequently reduces the operating cost of the integrated aerated biological filter-ozone catalytic oxidation device.

[0016] 4. This utility model shortens the ozone catalytic oxidation and biochemical treatment time, and at the same time significantly reduces the volume of the ozone catalytic oxidation zone and the aerated biological filter zone. Correspondingly, it also significantly improves the footprint and infrastructure investment of the integrated aerated biological filter-ozone catalytic oxidation device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This utility model Figure 1 A schematic diagram of the dissolved air pump dosing system.

[0019] In the diagram: 101, Device wall; 102, Filter plate; 103, Effluent weir; 200, Aerated biological filter; 201, Inlet system; 202, Backwash system; 203, Aeration system; 204, Support layer; 205, Filter media layer; 300, Ozone catalytic oxidation zone; 301, Ozone dosing system; 302, H2O2 dosing system; 303, Effluent system; 304, Backwash drainage system; 400, Dissolved air pump dosing system; 401, Dissolved air pump; 402, Pressure gauge; 403, Flow meter; 404, Valve; 405, Dissolved air release device. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1 , Figure 2 An integrated aerated biological filter-ozone catalytic oxidation device includes a device wall 101, an aerated biological filter 200 mounted on the device wall 101, an ozone catalytic oxidation zone 300 mounted on the device wall 101 above the aerated biological filter 200, a filter plate 102 inside the device wall 101, and an effluent weir 103 at the top of the device wall 101.

[0022] Please see Figure 1 The aerated biological filter 200 includes an inlet system 201, a backwashing system 202, an aeration system 203, a support layer 204, and a filter media layer 205. The inlet system 201 is equipped with the backwashing system 202. The aeration system 203 is located inside the device wall 101 and above the filter plate 102. The support layer 204 is located inside the device wall 101. The top of the support layer 204 is equipped with the filter media layer 205. The filter media layer 205 is filled with filter media as a carrier for microbial membranes. By designing the filter media layer 205, the filtration and biodegradation of pollutants in wastewater can be achieved.

[0023] Please see Figure 1The ozone catalytic oxidation zone 300 includes an ozone dosing system 301, an H2O2 dosing system 302, an effluent system 303, and a backwash drainage system 304. The ozone dosing system 301 is installed inside the device wall 101. The ozone dosing system 301 includes a dissolved air pump dosing system 400. The H2O2 dosing system 302 is installed inside the device wall 101 and above the ozone dosing system 301. The effluent system 303 is installed to the right of the effluent weir 103, and the backwash drainage system 304 is installed to the left of the effluent weir 103.

[0024] Please see Figure 2 The dissolved air pump dosing system 400 includes a dissolved air pump 401, pressure gauges 402, flow meters 403, valves 404, and a dissolved air release device 405. Two pressure gauges 402 are connected to the dissolved air pump 401 via pipelines, and two flow meters 403 are connected to the dissolved air pump 401 via pipelines. The two flow meters 403 are installed on the dissolved air water source pipeline and the ozone source pipeline, respectively. By designing the flow meters 403, the flow rates of dissolved air and ozone can be monitored. The dissolved air pump 401 is equipped with two flow meters 405. Dissolved gas water source and ozone source are connected by pipelines. Valves 404 are installed on the connecting pipelines between the dissolved gas pump 401 and the dissolved gas water source and the ozone source. Dissolved gas release device 405 is connected to the left side of the dissolved gas pump 401 by pipelines. There are multiple dissolved gas release devices 405, which are evenly distributed above the filter media layer 205. By designing multiple dissolved gas release devices 405, the uniform release of dissolved gas can be achieved. Valves 404 are installed on the connecting pipelines between the dissolved gas release device 405 and the dissolved gas pump 401.

[0025] The specific implementation process of this utility model is as follows: During use, the hydraulic retention times of the aerated biological filter zone 200 and the ozone catalytic oxidation zone 300 are 30-40 minutes and 10-15 minutes, respectively. Because the hydraulic retention times of these wastewater treatment zones are relatively short, the effective volume occupied by the wastewater treatment zone is correspondingly reduced, improving the footprint and infrastructure investment of the device.

[0026] The hydraulic retention time in the aerated biological filter zone 200 is 35 minutes, the hydraulic retention time in the ozone catalytic oxidation zone 300 is 12 minutes, the ozone dosage is 4 mg / L, and the 30 wt% H2O2 dosage is 7 mg / L.

[0027] The effluent from the ozone catalytic oxidation zone (300 cubic meters per second) was analyzed, and the results are as follows: TSS 6.1 mg / L, ammonia nitrogen 0.13 mg / L, nitrate nitrogen 0.11 mg / L, nitrite nitrogen 0.08 mg / L, pH 7.5–8.2, and water temperature 21–27℃. These results meet the water quality requirements for factory-scale recirculating aquaculture systems and offer high cost-effectiveness. This demonstrates that the integrated aerated biological filter-ozone catalytic oxidation device provided by this invention exhibits good treatment stability for factory-scale recirculating aquaculture wastewater.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated biological aerated filter-ozone catalytic oxidation apparatus comprising an apparatus wall (101), characterized in that: The device wall (101) is provided with a biological aerated filter (200), the device wall (101) is provided with an ozone catalytic oxidation zone (300), the ozone catalytic oxidation zone (300) is arranged above the biological aerated filter (200), the inside of the device wall (101) is provided with a filter plate (102), and the top of the device wall (101) is provided with a water outlet weir (103).

2. The integrated biological aerated filter-ozone catalytic oxidation apparatus according to claim 1, characterized by: The biological aerated filter (200) comprises a water inlet system (201), a backwashing system (202), an aeration system (203), a supporting layer (204) and a filter material layer (205), the water inlet system (201) is provided with the backwashing system (202), the inside of the device wall (101) and above the filter plate (102) is provided with the aeration system (203), the inside of the device wall (101) is provided with the supporting layer (204), and the top of the supporting layer (204) is provided with the filter material layer (205).

3. The integrated BAF-ozone catalytic oxidation apparatus according to claim 1, wherein: The ozone catalytic oxidation zone (300) comprises an ozone dosing system (301), an H2O2 dosing system (302), a water outlet system (303) and a backwashing drainage system (304), the inside of the device wall (101) is provided with the ozone dosing system (301), the ozone dosing system (301) comprises a dissolved gas pump dosing system (400), the inside of the device wall (101) and above the ozone dosing system (301) is provided with the H2O2 dosing system (302), the right side of the water outlet weir (103) is provided with the water outlet system (303), and the left side of the water outlet weir (103) is provided with the backwashing drainage system (304).

4. The integrated BAF-ozone catalytic oxidation apparatus according to claim 3, characterized in that: The dissolved gas pump dosing system (400) comprises a dissolved gas pump (401), a pressure gauge (402), a flow meter (403), a valve (404) and a dissolved gas releaser (405), two pressure gauges (402) are connected to the dissolved gas pump (401) through pipelines, the flow meter (403) is connected to the dissolved gas pump (401) through a pipeline, the dissolved gas pump (401) is respectively connected to a dissolved gas water source and an ozone gas source through pipelines, the connection pipelines of the dissolved gas pump (401) and the dissolved gas water source and the ozone gas source are all provided with the valve (404), the left side of the dissolved gas pump (401) is connected to the dissolved gas releaser (405) through a pipeline, and the connection pipeline of the dissolved gas releaser (405) and the dissolved gas pump (401) is provided with the valve (404).

5. The integrated BAF-ozone catalytic oxidation apparatus according to claim 2, wherein: The inside of the filter material layer (205) is filled with filter material as a microbial membrane carrier.

6. The integrated BAF-Ozone catalytic oxidation apparatus according to claim 4, wherein: The number of the dissolved gas releasers (405) is multiple, and the multiple dissolved gas releasers (405) are evenly arranged above the filter material layer (205).

7. The integrated BAF-Ozone catalytic oxidation apparatus according to claim 4, wherein: The number of the flow meters (403) is two, and the two flow meters (403) are respectively installed on the dissolved gas water source pipeline and the ozone gas source pipeline.

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