Tail water filtering and purifying device for sewage plant

Abstract

The utility model discloses a tail water filtering and purifying device for a sewage plant. The tail water filtering and purifying device comprises a treatment tank, a water distribution assembly and a gas distribution assembly, the interior of the treatment tank is divided into a water and gas inlet area, an ozone catalytic reaction area, an aerobic oxidation filtering area and a plant area through a supporting plate, a partition plate and a water type floating bed which are sequentially arranged from bottom to top; through holes are respectively formed in the supporting plate and the partition plate; the ozone catalytic reaction zone is provided with a catalyst layer; the aerobic oxidation filter area is provided with a filter material layer; a water inlet and an air inlet are formed in the bottom of the treatment tank; a water outlet is formed in the top of the treatment tank; the water distribution assembly is connected with the water inlet; and the gas distribution assembly is connected with the gas inlet. The tail water treatment assembly line is simple in structure and high in practicability, can remove drug residues in tail water, and particularly, the tail water treatment assembly line is arranged from bottom to top, so that the ozone utilization rate is increased, the occupied area is reduced, and the problem of low ozone utilization rate in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment equipment technology, and in particular to a sewage treatment plant effluent filtration and purification device. Background Technology

[0002] While medications treat diseases, a significant portion enters water bodies through human metabolism and improper disposal, causing serious water pollution. Traditional wastewater treatment processes, such as activated sludge processes and biological filters, while effectively removing organic matter and nutrients, have limitations in treating recalcitrant pollutants like drug residues. Drug residues in wastewater effluent are typically present in trace amounts, and due to their difficulty in degradation and removal, they may have potential long-term impacts on aquatic life and human health, posing a major challenge to water environment protection and governance.

[0003] To address this challenge, ozone catalytic oxidation technology, as an advanced oxidation process, has been proposed for removing drug residues from wastewater. Ozone possesses strong oxidizing properties, capable of disrupting the structure of drug molecules and enhancing their biodegradability. However, ozone catalytic oxidation suffers from low ozone utilization; most ozone is converted into oxygen during the reaction, failing to be effectively utilized, which limits the economic viability and practicality of the technology. On the other hand, microbial treatment processes in wastewater treatment are often limited by dissolved oxygen; in many cases, insufficient dissolved oxygen supply leads to poor microbial purification effects. Furthermore, wastewater purification methods typically require large land areas and high operating costs. Large treatment ponds and complex operation and maintenance requirements make these technologies difficult to implement in areas with limited land resources or economic constraints. The inventors previously disclosed a method for removing pollutants from wastewater treatment plant wastewater, which involves first subjecting the wastewater in an equalization tank to an ozone catalytic reaction, followed by biochemical treatment to obtain treated wastewater. While this system can remove drug residues from wastewater, it requires a large land area, limiting its use, and suffers from low ozone utilization. Therefore, in response to the above problems and technical requirements, it is necessary to improve the existing wastewater treatment equipment. Summary of the Invention

[0004] The purpose of this utility model is to provide a wastewater treatment plant effluent filtration and purification device with a simple structure and strong practicality. It can remove drug residues in the effluent. In particular, the effluent treatment line adopts a bottom-up setting, which improves ozone utilization and reduces the footprint.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A wastewater treatment plant effluent filtration and purification device includes a treatment tank, a water distribution assembly, and an air distribution assembly. The interior of the treatment tank is divided into a water inlet and air inlet zone, an ozone catalytic reaction zone, an aerobic oxidation filtration zone, and a plant zone by a support plate, a partition plate, and a water-type floating bed arranged sequentially from bottom to top. The support plate and the partition plate are respectively provided with through holes. The ozone catalytic reaction zone is provided with a catalyst layer. The aerobic oxidation filtration zone is provided with a filter media layer. The bottom of the treatment tank is provided with a water inlet and an air inlet. The top of the treatment tank is provided with a water outlet. The water distribution assembly is connected to the water inlet. The air distribution assembly is connected to the air inlet.

[0007] In this invention, the wastewater treatment line is arranged from bottom to top. The water distribution component is used to introduce wastewater into the treatment tank, and the gas distribution component is used to introduce ozone into the treatment tank. The introduced wastewater passes through the water and gas inlet zone, the ozone catalytic reaction zone, the aerobic oxidation filtration zone, and the plant zone in sequence to degrade drug residues and other pollutants. The treated wastewater is discharged through the outlet.

[0008] Preferably, the through-hole diameter of the support plate is 1-10 mm; the through-hole porosity of the partition plate is 30-90%. More preferably, the through-hole diameter of the support plate is 1-5 mm; the through-hole porosity of the partition plate is 50-70%. The support plate is used to support the catalyst, ensuring uniform water flow and preventing catalyst loss. The partition plate is used to separate the ozone catalytic reaction zone from the aerobic oxidation filtration zone, preventing catalyst and filter media loss. In practical applications, the material composition of the support plate and partition plate can be selected as needed. The support plate can be a high-density polyethylene plate, and the partition plate can be a PVC plate or a polypropylene plate, without affecting the realization of the technical effect of this utility model.

[0009] Preferably, the plant area includes aquatic plants; the area of ​​the aquatic plants is 5-45% of the area of ​​the floating bed. More preferably, the area of ​​the aquatic plants is 10-35% of the area of ​​the floating bed. The aquatic plants can be reeds or cattails, used to further absorb and transform nutrients and pollutants in the wastewater, improve water purification, and increase the oxygen content in the water.

[0010] Preferably, the catalyst layer is a biomass ash layer, an activated carbon layer, or a titanium-silicon molecular sieve layer. The catalyst layer is used to improve ozone utilization and oxidation efficiency. The introduced ozone passes through the support plate into the ozone catalytic reaction zone, contacts the catalyst layer, and initiates a catalytic ozonation reaction to generate active oxygen. This converts drug molecules and other difficult-to-degrade pollutants into intermediate products more conducive to biochemical treatment. Simultaneously, the reaction process generates oxygen, forming dissolved oxygen, which is beneficial for further treatment in the next stage.

[0011] Preferably, the filter media layer is a biomass ash layer or a volcanic rock layer. The filter media layer provides an attachment surface for microorganisms. The dissolved oxygen in the effluent entering the aerobic oxidation filtration zone is conducive to microbial growth and can further degrade drug residues and intermediate products in the effluent.

[0012] Preferably, the outlet is an overflow outlet. The treated effluent can be automatically discharged through the overflow outlet without the need for additional power equipment.

[0013] Preferably, the outlet is connected to a three-way valve. The three-way valve is used to control the direction and speed of the water flow. One end of the three-way valve is connected to the outlet, and the other end is connected to the inlet. In practical applications, the end connected to the inlet can also be connected to the tailwater tank. The treated tailwater is discharged through the outlet. If the water quality meets the sewage discharge standards, the tailwater is discharged directly. If the water quality does not meet the sewage discharge standards, the three-way valve is used to change the water flow path and the water is re-entered into the treatment tank until it meets the sewage discharge standards before being discharged.

[0014] As is common knowledge, this utility model has a conventional sampling port, and the sampling port is used to sample and test water quality. This is a conventional technique and does not affect the understanding of this utility model by those skilled in the art.

[0015] Furthermore, the water distribution assembly includes a power unit and water pipes. The power unit is used to introduce the wastewater to be treated into the treatment tank. It can be a conventional peristaltic pump or a water pump, whichever is selected according to the actual application. As long as it can introduce the wastewater into the treatment tank, it will not affect the realization of the technical effect of this utility model.

[0016] Furthermore, the aeration assembly includes an ozone generator and an aeration pipe; the ozone generator is connected to an air inlet via the aeration pipe. The ozone generator is used to generate ozone, which is then introduced into the treatment tank through the aeration pipe to remove drug residues and other difficult-to-degrade pollutants from the effluent.

[0017] Due to the application of the above technical solutions, the beneficial effects of this utility model compared with the prior art are as follows: First, this utility model uses ozone catalytic oxidation technology to treat effluent, which can degrade drug residues and other pollutants that are difficult to degrade in the water. In particular, by setting a catalyst layer, the ozone utilization rate and oxidation efficiency are improved, solving the problem of low ozone utilization rate in the prior art. At the same time, the effluent treatment line of this utility model adopts a bottom-up setting method, which reduces the footprint. Second, by setting a filter layer, a surface for microorganisms to attach is provided, which can further degrade pollutants in the effluent. Third, by setting a plant area, nutrients and pollutants in the water are absorbed and transformed, improving the water purification effect. Fourth, the outlet is connected to a three-way valve. If the water quality does not meet the sewage discharge standards, the treated effluent can be circulated back into the treatment tank for multiple cycles of treatment to ensure that the treated effluent meets the sewage discharge standards and prevent environmental pollution. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the filtration and purification device for wastewater effluent from a sewage treatment plant.

[0019] The components include: treatment tank 1, support plate 2, baffle 3, water-type floating bed 4, catalyst layer 5, filter media layer 6, water inlet 7, air inlet 8, water outlet 9, three-way valve 10, power equipment 11, water pipe 12, ozone generator 13, aeration pipe 14, water and air inlet zone 15, ozone catalytic reaction zone 16, aerobic oxidation filtration zone 17, plant zone 18, and effluent homogenization tank 19. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. The specific components involved are existing products, and the connection and usage methods between the specific components are conventional technologies. Example 1

[0021] like Figure 1 As shown:

[0022] A wastewater treatment plant effluent filtration and purification device includes a treatment tank 1, a water distribution assembly, and an air distribution assembly. The interior of the treatment tank is divided into a water and air inlet zone 15, an ozone catalytic reaction zone 16, an aerobic oxidation filtration zone 17, and a plant zone 18 by a support plate 2, a partition plate 3, and a water-type floating bed 4 arranged sequentially from bottom to top. The support plate and the partition plate are provided with through holes. The ozone catalytic reaction zone is provided with a catalyst layer 5. The aerobic oxidation filtration zone is provided with a filter media layer 6. The bottom of the treatment tank is provided with a water inlet 7 and an air inlet 8. The top of the treatment tank is provided with a water outlet 9.

[0023] In this embodiment, the support plate is a high-density polyethylene plate with a through-hole diameter of 3mm; the partition is a polypropylene plate with a through-hole porosity of 60%.

[0024] The plant area includes aquatic plants; the area of ​​aquatic plants accounts for 30% of the area of ​​the floating bed. In practical applications, aquatic plants can be reeds or cattails, used to further absorb and transform nutrients and pollutants in the wastewater. The selection is based on needs and does not affect the realization of the technical effect of this utility model.

[0025] In this embodiment, the catalyst layer is a biomass ash layer. Biomass ash is the ash produced by burning biomass fuels such as straw and wood in a biomass power plant. It is an existing product. In actual use, the biomass ash is conventionally spread flat on a support plate to form a biomass ash layer.

[0026] In this embodiment, the filter layer is a volcanic rock layer, which is an existing product. In actual use, volcanic rock particles are conventionally laid flat on the partition to form a volcanic rock layer.

[0027] In this embodiment, the outlet is an overflow outlet connected to a three-way valve 10. One end of the three-way valve is connected to the outlet, and the other end is connected to the tailwater homogenization tank, where the tailwater originates from the wastewater treatment plant.

[0028] As is common knowledge, this utility model has a conventional sampling port, and the sampling port is used to sample and test water quality. This is a conventional technique and does not affect the understanding of this utility model by those skilled in the art.

[0029] The water distribution assembly includes a power unit 11 and a water pipe 12. The tailwater equalization tank 19 is connected to the inlet via the water pipe. The power unit is a conventional peristaltic pump.

[0030] The gas distribution assembly includes an ozone generator 13 and an aeration pipe 14; the ozone generator is connected to the air inlet through the aeration pipe.

[0031] The main working process of this wastewater treatment plant effluent filtration and purification device is as follows:

[0032] (1) The peristaltic pump feeds the tailwater in the tailwater homogenization tank into the treatment tank, while the ozone generator produces ozone which is then fed into the treatment tank.

[0033] (2) The effluent passes through the water inlet and air inlet zone, the ozone catalytic reaction zone, the aerobic oxidation filtration zone, and the plant zone in sequence. If the water quality meets the sewage discharge standard, the effluent is discharged directly. If the water quality does not meet the sewage discharge standard, the water flow path is changed by using a three-way valve and the water is fed into the effluent homogenization tank.

[0034] (3) Repeat steps (1) and (2) until the water quality meets the wastewater discharge standard, discharge the tailwater, and complete the tailwater treatment.

[0035] In practical applications of the device according to this utility model, those skilled in the art can select specific wastewater treatment processes as needed, such as ozone dosing parameters, without affecting their understanding of the technical effects of this utility model. Comparative Example 1

[0036] Based on Example 1, the difference in this example is that the catalyst layer is omitted, while the rest is the same. Comparative Example 2

[0037] Ozone is directly introduced into the effluent equalization tank for effluent treatment.

[0038] Application Experiment

[0039] The wastewater effluent (containing a small amount of drug residue and not meeting the wastewater discharge standard) was treated once (without recycling) using the apparatus of Example 1, Comparative Example 1, and Comparative Example 2, respectively. The water quality after the first treatment by the apparatus of Example 1 met the wastewater discharge standard, while the water quality after the first treatment by the apparatus of Comparative Example 1 and Comparative Example 2 did not meet the wastewater discharge standard.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the principle of the present utility model, and these should also be considered to fall within the protection scope of the present utility model.

Claims

1. A wastewater treatment plant effluent filtration and purification device, characterized in that: The system includes a treatment tank, a water distribution assembly, and an air distribution assembly. The interior of the treatment tank is divided into a water and air inlet zone, an ozone catalytic reaction zone, an aerobic oxidation filtration zone, and a plant zone, arranged sequentially from bottom to top by a support plate, a partition, and a water-type floating bed. The support plate and partition are provided with through holes. The ozone catalytic reaction zone has a catalyst layer. The aerobic oxidation filtration zone has a filter media layer. The bottom of the treatment tank has a water inlet and an air inlet. The top of the treatment tank has a water outlet. The water distribution assembly is connected to the water inlet. The air distribution assembly is connected to the air inlet.

2. The wastewater treatment plant effluent filtration and purification device according to claim 1, characterized in that: The through-hole diameter of the support plate is 1~10mm; the porosity of the through-hole of the partition plate is 30~90%.

3. The wastewater treatment plant effluent filtration and purification device according to claim 1, characterized in that: The plant area contains aquatic plants.

4. The wastewater treatment plant effluent filtration and purification device according to claim 3, characterized in that: The area covered by the aquatic plants is 5-45% of the area of ​​the floating bed.

5. The wastewater treatment plant effluent filtration and purification device according to claim 1, characterized in that: The catalyst layer is a biomass ash layer, an activated carbon layer, or a titanium-silicon molecular sieve layer.

6. The wastewater treatment plant effluent filtration and purification device according to claim 1, characterized in that: The filter media layer is a biomass ash layer or a volcanic rock layer.

7. The wastewater treatment plant effluent filtration and purification device according to claim 1, characterized in that: The outlet is an overflow outlet.

8. The wastewater treatment plant effluent filtration and purification device according to claim 1, characterized in that: The outlet is connected to a three-way valve.

9. The wastewater treatment plant effluent filtration and purification device according to claim 1, characterized in that: The water distribution assembly includes a power unit and water pipes.

10. The wastewater treatment plant effluent filtration and purification device according to claim 1, characterized in that: The gas distribution assembly includes an ozone generator and an aeration pipe; the ozone generator is connected to the air inlet through the aeration pipe.

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