Multi-tank type sewage treatment device for garden filter tank and use method of multi-tank type sewage treatment device

Abstract

The invention discloses a multi-pool type sewage treatment device for a garden filter pool and a use method thereof, and relates to the technical field of sewage treatment, the multi-pool type sewage treatment device comprises a water storage pool and a sewage treatment assembly. A multi-layer filter tank structure is adopted, sewage is subjected to rough filtration, microfiltration and biological treatment, the pollutant removal efficiency is enhanced, an ecological intelligent coupling system is introduced, automatic regulation and control of filter tank operation parameters are achieved, energy consumption is optimized, the treatment effect is guaranteed, landscape architecture design elements are combined, the appearance of the filter tank is naturally integrated into the environment, the overall attractiveness is improved, and the ecological intelligent coupling system is suitable for large-scale popularization and application. The device is provided with a recycling system, energy consumption is further reduced, effective utilization of sewage resources is facilitated, sustainable development of the garden ecological environment is promoted, the three targets of sewage treatment, energy conservation and consumption reduction and landscaping are achieved, and the device is particularly suitable for being applied to urban parks and ecological community scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to a multi-pool type sewage treatment device for a garden filter tank and a using method thereof. Background Art

[0002] A garden filter tank is a commonly used water treatment facility in garden water features or ecological projects, mainly used for purifying water bodies, improving water quality, and having a landscape effect at the same time; Sewage treatment refers to the process of removing pollutants in sewage through physical, chemical, biological and other methods to make it meet the discharge standard or reuse requirements. With the acceleration of the urbanization process, the demand for sewage treatment in garden landscapes and ecological communities is increasing day by day.

[0003] The Chinese invention patent with the authorization announcement number CN119733288A discloses a sewage treatment system for a garden filter tank, including a filter cylinder. One end of the filter cylinder is fixedly connected with a water inlet pipe, the other end of the filter cylinder is connected with a drain pipe, a plurality of filter plates are slidably installed inside the filter cylinder, and a driving mechanism is installed on the filter cylinder. The driving mechanism is used to drive the filter plates to move along the length direction of the filter cylinder. This application has the effect of improving the filtration efficiency; The Chinese patent with the authorization announcement number CN102786144B discloses a construction method for a garden filter tank sewage treatment facility. The main structure includes a pool body, a shallow water tank, and a deep water tank. The inside of the pool body includes a filler layer, an isolation layer, a permeable brick walkway layer, and a tree layer from bottom to top, and perforated air-permeable vertical pipes are arranged. According to the sewage quality, quantity and treatment process requirements, the up-flow or down-flow subsurface flow state is formed by using the design characteristics of the shallow water tank and the deep water tank. The trees are water-tolerant native garden trees and shrubs, and their roots are located in the filler layer. The present invention is constructed by utilizing the green land planned for land, combining the purification effect of garden trees, without occupying additional land or occupying less land, being less affected by climate, having a good continuous effect, no secondary pollution, being easy to maintain and having low cost. It can be widely used in the decentralized up-to-standard treatment of domestic sewage in villages and towns, communities, enterprises and institutions, single buildings, as well as wastewater from livestock and poultry farms, etc., reducing the pressure on municipal sewage treatment, and realizing the functional goals of integrating sewage treatment with resource utilization, environmental beautification and wood production.

[0004] Among the above patents, in Comparative Document 1, the sewage treatment work is completed through a mechanical structure, and the sewage treatment cannot be combined with the self-cleaning function of garden plants, resulting in high energy consumption and troublesome maintenance. Although Comparative Document 2 combines ecology to complete sewage treatment, it uses a single filter tank structure, is prone to blockage, cannot detect the dissolved oxygen inside, is prone to an anaerobic environment, affects the denitrification efficiency, and affects the sewage treatment quality. Summary of the Invention

[0005] The object of the present invention is to provide a multi-pool type sewage treatment device for a garden filter pool and its usage method, which solves the problems that sewage treatment cannot be combined with the self-cleaning function of garden plants, has high energy consumption, is troublesome to maintain, adopts a single filter pool structure, is easy to be blocked, cannot detect the dissolved oxygen inside, is prone to anaerobic environment, affects the denitrification efficiency, and affects the quality of sewage treatment.

[0006] The present invention solves the above technical problems through the following technical solutions. The present invention includes: A water storage tank, on the back side of which a stepped mounting frame is installed; A sewage treatment assembly, which is installed on the top of the stepped mounting frame and is used for purifying the water in the water storage tank and external sewage; The sewage treatment assembly includes a sedimentation and regulation tank installed on the top of the top end of the stepped mounting frame, a biological filter tank installed on the top of the middle end of the stepped mounting frame, a deep filter tank installed on the top of the bottom end of the stepped mounting frame, a suspended solid filtration structure installed inside the sedimentation and regulation tank, an organic matter degradation structure installed inside the biological filter tank, a nitrogen and phosphorus removal structure installed inside the deep filter tank, and a pathogen inactivation structure installed inside the water storage tank.

[0007] Preferably, a pump body is installed on the top of the sedimentation and regulation tank through bolts. Both ends of the pump body are respectively connected with a tee pipe and a water inlet pipe through pipes. The tee pipe is connected with a sewage pipe and a circulation pipe through pipes. The water inlet pipe cooperates with the sedimentation and regulation tank.

[0008] Preferably, the suspended solid filtration structure includes a coarse grille plate, a fine grille plate and an inclined sedimentation plate which are sequentially installed on the inner side wall of the sedimentation and regulation tank. The coarse grille plate is provided with 20-mm gap holes, the fine grille plate is provided with 5-mm gap holes, and the water inlet pipe is installed on one side of the coarse grille plate.

[0009] Preferably, the organic matter degradation structure includes a plant layer installed on the inner side wall of the biological filter tank and an aerobic filter layer installed at the bottom of the plant layer.

[0010] Preferably, the plant layer includes a floating plate installed between the inner side walls of the biological filter tank, a reed layer and a Cyperus alternifolius layer planted on the floating plate, and a biological rope installed at the roots of the reed layer and the Cyperus alternifolius layer.

[0011] Preferably, the aerobic filter layer includes an aeration pump installed on the back side of the biological filter tank through bolts, a filter material plate installed at the bottom of the floating plate, and an air distribution pipe installed inside the filter material plate. The aeration pump is communicated with the air distribution pipe through a pipe. An electric rotary aeration head is installed on the top of the air distribution pipe. The filter material plate is made of volcanic rock material.

[0012] Preferably, the nitrogen and phosphorus removal structure includes a sulfur particle layer installed on the inner side wall of the deep filter tank, a sulfur limestone mixed layer installed at the bottom of the sulfur particle layer, and a limestone stabilizing layer installed at the bottom of the sulfur limestone mixed layer. Anti-blocking holes are provided in the sulfur particle layer, the sulfur limestone mixed layer, and the limestone stabilizing layer, and vertical ventilation pipes are installed in the anti-blocking holes.

[0013] Preferably, the pathogen inactivation structure includes an ultraviolet germicidal lamp installed on the inner side wall of the storage tank and a plant floating island installed inside the storage tank, and the plant floating island secretes bacteriostatic substances.

[0014] Preferably, an aeration fountain is installed inside the storage tank. The sedimentation and regulation tank is connected to the biological filter tank through a pipeline, the biological filter tank is connected to the deep filter tank through a pipeline, the deep filter tank is connected to the storage tank through a drop pipe. An optical dissolved oxygen sensor is installed in the middle of the aerobic filter layer, an ammonia nitrogen sensor is installed at the outlet of the biological filter tank, and a nitrate sensor is installed at the outlet of the deep filter tank.

[0015] A method for using a multi-tank type sewage treatment device for garden filter tanks specifically includes the following steps: Step 1: Sewage from municipal / garden areas is transported to a three-way pipe through a sewage pipe, and then transported to the sedimentation and regulation tank through a pump body and a water inlet pipe, and the suspended substances in the sewage are filtered through a suspended substance filtration structure; Step 2: The treated sewage enters the biological filter tank through a pipeline, the organic substances in the sewage are degraded through an organic matter degradation structure, and the conversion of ammonia nitrogen is completed through aeration; Step 3: The treated sewage enters the deep filter tank through a pipeline, and the nitrogen and phosphorus in the sewage are removed through a nitrogen and phosphorus removal structure; Step 4: The purified water enters the storage tank through a drop pipe, and the germs in the water are removed through a pathogen inactivation structure; Step 5: When it is necessary to purify the water in the storage tank, the water in the storage tank is introduced into the sedimentation and regulation tank through a pump body, a three-way pipe, and a circulation pipe, passes through the biological filter tank and the deep filter tank in sequence, and then returns to the storage tank again.

[0016] The beneficial effects of the present invention compared with the prior art are as follows: The sewage treatment device for the garden filter tank adopts a multi-layer filter tank structure, which respectively conducts coarse filtration, microfiltration and biological treatment on sewage, strengthens the pollutant removal efficiency, introduces an ecological intelligent coupling system, realizes the automatic regulation of the operating parameters of the filter tank, optimizes the energy consumption and ensures the treatment effect. Combined with the garden landscape design elements, the appearance of the filter tank naturally integrates into the environment, improving the overall aesthetic degree. The device is equipped with a recycling system to further reduce energy consumption, which not only helps to realize the effective utilization of sewage resources, but also promotes the sustainable development of the garden ecological environment, achieving the triple goals of sewage treatment, energy conservation and consumption reduction, and landscape beautification, and is particularly suitable for application in urban parks and ecological community scenarios. Brief Description of the Drawings

[0017] Figure 1 It is a three-dimensional structure diagram of the present invention; Figure 2 It is a three-dimensional structure diagram of the suspended solid filtration structure in the present invention; Figure 3 It is a three-dimensional structure diagram of the organic matter degradation structure in the present invention; Figure 4 It is a three-dimensional structure diagram of the nitrogen and phosphorus removal structure in the present invention; Figure 5 It is a material diagram of the filter media plate in the present invention; Figure 6 It is a material diagram of the nitrogen and phosphorus removal structure in the present invention.

[0018] The numbers in the figures represent: 1, water storage tank; 2, stepped mounting frame; 3, sewage treatment component; 301, sedimentation adjustment tank; 302, biological filter tank; 303, deep filter tank; 304, suspended solid filtration structure; 3041, coarse grid plate; 3042, fine grid plate; 3043, inclined sedimentation plate; 305, organic matter degradation structure; 3051, plant layer; 3052, aerobic filter layer; 306, nitrogen and phosphorus removal structure; 3061, sulfur granule layer; 3062, sulfur limestone mixed layer; 3063, limestone stabilization layer; 307, nitrogen and phosphorus removal structure; 3071, ultraviolet germicidal lamp; 3072, plant floating island; 4, pump body; 5, tee; 6, water inlet pipe; 7, sewage pipe; 8, circulation pipe; 9, floating plate; 10, reed layer; 11, Cyperus alternifolius layer; 12, biological rope; 13, aeration pump; 14, filter media plate; 15, aeration pipe; 16, electric rotary aeration head; 17, oxygen-increasing fountain; 18, drop pipe. Detailed Embodiment

[0019] The following further elaborates on the above and additional technical features and advantages of the present invention in conjunction with the accompanying drawings.

[0020] The present invention provides a technical solution: a multi-pool type sewage treatment device for a garden filter pool, as Figure 1-6 shown, which includes a water storage tank 1 and a sewage treatment component 3; A stepped mounting frame 2 is installed on the back side of the water storage tank 1; A pump body 4 is installed on the top of the sedimentation and regulation tank 301 through bolts. Both ends of the pump body 4 are respectively connected with a three-way pipe 5 and a water inlet pipe 6 through pipelines. The three-way pipe 5 is connected with a sewage pipe 7 and a circulation pipe 8 through pipelines. The water inlet pipe 6 cooperates with the sedimentation and regulation tank 301; An aeration fountain 17 is installed inside the water storage tank 1. The sedimentation and regulation tank 301 is connected to the biological filter tank 302 through a pipeline. The biological filter tank 302 is connected to the deep filter tank 303 through a pipeline. The deep filter tank 303 is connected to the water storage tank 1 through a drop pipe 18. An optical dissolved oxygen sensor is installed in the middle of the aerobic filter layer 3052. An ammonia nitrogen sensor is installed at the water outlet of the biological filter tank 302. A nitrate sensor is installed at the water outlet of the deep filter tank 303; In a specific implementation, as Figure 1-6 shown, the sewage treatment component 3 is installed on the top of the stepped mounting frame 2, and the sewage treatment component 3 is used to purify the water in the water storage tank 1 and external sewage; The sewage treatment component 3 includes a sedimentation and regulation tank 301 installed on the top of the top end of the stepped mounting frame 2, a biological filter tank 302 installed on the top of the middle end of the stepped mounting frame 2, a deep filter tank 303 installed on the top of the bottom end of the stepped mounting frame 2, a suspended solid filtering structure 304 installed inside the sedimentation and regulation tank 301, an organic matter degradation structure 305 installed inside the biological filter tank 302, a nitrogen and phosphorus removal structure 307306 installed inside the deep filter tank 303, and a pathogen inactivation structure installed inside the water storage tank 1.

[0021] Furthermore, the suspended solid filtering structure 304 includes a coarse grille plate 3041, a fine grille plate 3042, and an inclined sedimentation plate 3043 sequentially installed on the inner side wall of the sedimentation and regulation tank 301. The coarse grille plate 3041 is provided with 20 mm gap holes, the fine grille plate 3042 is provided with 5 mm gap holes, and the water inlet pipe 6 is installed on one side of the coarse grille plate 3041.

[0022] Even further, the organic matter degradation structure 305 includes a plant layer 3051 installed on the inner side wall of the biological filter tank 302 and an aerobic filter layer 3052 installed at the bottom of the plant layer 3051. The plant layer 3051 includes a floating plate 9 installed between the inner side walls of the biological filter tank 302, a reed layer 10 and a Cyperus alternifolius layer 11 planted on the floating plate 9, and a biological rope 12 installed at the roots of the reed layer 10 and the Cyperus alternifolius layer 11.

[0023] Furthermore, the aerobic filter layer 3052 includes an aeration pump 13 bolted to the back side of the biological filter tank 302, a filter media plate 14 installed at the bottom of the floating plate 9, and an air distribution pipe 15 installed inside the filter media plate 14. The aeration pump 13 is connected to the air distribution pipe 15 through a pipeline. An electric rotary aeration head 16 is installed at the top of the air distribution pipe 15. The filter media plate 14 is made of volcanic rock material.

[0024] Furthermore, the nitrogen and phosphorus removal structure 307306 includes a sulfur granule layer 3061 installed on the inner side wall of the deep filter tank 303, a sulfur limestone mixed layer 3062 installed at the bottom of the sulfur granule layer 3061, and a limestone stabilizing layer 3063 installed at the bottom of the sulfur limestone mixed layer 3062. Anti-blocking holes are provided on the sulfur granule layer 3061, the sulfur limestone mixed layer 3062, and the limestone stabilizing layer 3063, and vertical ventilation pipes are installed in the anti-blocking holes.

[0025] Furthermore, the pathogen inactivation structure includes an ultraviolet germicidal lamp 3071 installed on the inner side wall of the storage tank 1 and a plant floating island 3072 installed inside the storage tank 1. The plant floating island 3072 secretes bacteriostatic substances.

[0026] During use, the sewage from municipal / garden is transported to the tee 5 through the sewage pipe 7. The pump body 4 works to introduce the sewage in the sewage pipe 7 into the water inlet pipe 6, and then into the sedimentation and regulation tank 301. Large suspended solids are filtered through the coarse grid plate 3041, and small suspended solids are filtered through the fine grid plate 3042. The sewage accumulates and precipitates on the inclined sedimentation plate 3043 and stays for one and a half to two hours. The removal rate of suspended solids is greater than 75%. The treated sewage enters the biological filter tank 302 through a pipeline. The sewage sequentially passes through the reed layer 10, the Cyperus alternifolius layer 11, and the aerobic filter layer 3052. Macromolecules are degraded by the enzymes secreted by the reed layer 10 and the Cyperus alternifolius layer 11. Organic matter is removed by biofilm oxidation through the volcanic rock filter media plate 14. Aeration work is completed through the aeration pump 13 and the air distribution pipe 15 to increase dissolved oxygen and improve the quality of organic matter degradation. At the same time, ammonia nitrogen conversion is completed. The treated sewage enters the deep filter tank 303, and deep denitrification and phosphorus removal are carried out through the sulfur granule layer 3061, the sulfur limestone mixed layer 3062, and the limestone stabilizing layer 3063. The treated sewage enters the storage tank 1 through the drop pipe 18. When the water passes through the drop pipe 18, it contacts the air to increase oxygen. Disinfection work is completed through the ultraviolet germicidal lamp 3071 and the bacteriostatic substances secreted by the plant floating island 3072. The dissolved oxygen in the storage tank 1 can be increased through the aerating fountain 17. The water in the storage tank 1 can be used for garden spraying; After being placed for a long time, the water in the storage tank 1 may be contaminated. The water in the storage tank 1 is introduced into the sedimentation and regulation tank 301 through the pump body 4, the three-way pipe 5 and the circulation pipe 8, and successively passes through the biological filter tank 302 and the deep filter tank 303, and then returns to the inside of the storage tank 1 to complete the self-circulation purification work. The optical dissolved oxygen sensor in the aerobic filter layer 3052, the ammonia nitrogen sensor at the outlet of the biological filter tank 302, and the nitrate sensor at the outlet of the deep filter tank 303 are used to monitor the parameters in each filter tank, and the opening degree of the electric rotary aeration head 16 is adjusted according to the usage requirements to control the aeration volume; The sewage treatment device for garden filter tanks adopts a multi-layer filter tank structure, which respectively conducts coarse filtration, microfiltration and biological treatment on sewage, strengthens the pollutant removal efficiency, introduces an ecological intelligent coupling system, realizes the automatic regulation of the operation parameters of the filter tank, optimizes the energy consumption and ensures the treatment effect. Combined with the garden landscape design elements, the appearance of the filter tank naturally integrates into the environment, improving the overall aesthetics. The device is equipped with a recycling system, which further reduces the energy consumption. It not only helps to achieve the effective utilization of sewage resources, but also promotes the sustainable development of the garden ecological environment, achieving the triple goals of sewage treatment, energy conservation and consumption reduction, and landscape beautification, and is especially suitable for application in urban parks and ecological community scenarios.

[0027] A method for using a multi-tank type sewage treatment device for garden filter tanks specifically includes the following steps: Step 1: The sewage from the municipal / garden is transported to the three-way pipe 5 through the sewage pipe 7, and is transported to the inside of the sedimentation and regulation tank 301 through the pump body 4 and the water inlet pipe 6, and the suspended substances in the sewage are filtered through the suspended substance filtering structure 304; Step 2: The treated sewage enters the biological filter tank 302 through the pipeline, the organic substances in the sewage are degraded through the organic matter degradation structure 305, and the conversion of ammonia nitrogen is completed through aeration; Step 3: The treated sewage enters the deep filter tank 303 through the pipeline, and the nitrogen and phosphorus in the sewage are removed through the nitrogen and phosphorus removal structure 307306; Step 4: The purified water enters the inside of the storage tank 1 through the drop pipe 18, and the germs in the water are removed through the pathogen inactivation structure; Step 5: When it is necessary to purify the water in the storage tank 1, the water in the storage tank 1 is introduced into the sedimentation and regulation tank 301 through the pump body 4, the three-way pipe 5 and the circulation pipe 8, and successively passes through the biological filter tank 302 and the deep filter tank 303, and then returns to the inside of the storage tank 1.

[0028] The above is only the preferred embodiment of the present invention, which is illustrative rather than restrictive to the present invention. Those skilled in the art understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, but all will fall within the protection scope of the present invention.

Claims

1. A sewage treatment device with multiple tank types for garden filter ponds, characterized in that, Comprising: A water storage tank (1), on the back side of which a stepped mounting frame (2) is installed; A sewage treatment component (3), which is installed on the top of the stepped mounting frame (2), and the sewage treatment component (3) is used to purify the water in the water storage tank (1) and external sewage; The sewage treatment component (3) includes a sedimentation and regulation tank (301) installed on the top of the top end of the stepped mounting frame (2), a biological filter tank (302) installed on the top of the middle end of the stepped mounting frame (2), a deep filter tank (303) installed on the top of the bottom end of the stepped mounting frame (2), a suspended solid filtration structure (304) installed inside the sedimentation and regulation tank (301), an organic matter degradation structure (305) installed inside the biological filter tank (302), a nitrogen and phosphorus removal structure (307)(306) installed inside the deep filter tank (303), and a pathogen inactivation structure installed inside the water storage tank (1).

2. The multi-pool type sewage treatment device for a garden filter pond according to claim 1, characterized in that, A pump body (4) is installed on the top of the sedimentation and regulation tank (301) by bolts. Both ends of the pump body (4) are respectively connected with a tee pipe (5) and a water inlet pipe (6) through pipes. The tee pipe (5) is connected with a sewage pipe (7) and a circulation pipe (8) through pipes. The water inlet pipe (6) cooperates with the sedimentation and regulation tank (301).

3. The sewage treatment device with multiple tank types for garden filter pools according to claim 2, wherein, The suspended solid filtration structure (304) includes a coarse grid plate (3041), a fine grid plate (3042), and an inclined sedimentation plate (3043) installed in sequence on the inner side wall of the sedimentation and regulation tank (301). The coarse grid plate (3041) is provided with 20mm gap holes, the fine grid plate (3042) is provided with 5mm gap holes, and the water inlet pipe (6) is installed on one side of the coarse grid plate (3041).

4. The multi-pool type sewage treatment device for a garden filter pool according to claim 2, wherein, The organic matter degradation structure (305) includes a plant layer (3051) installed on the inner side wall of the biological filter tank (302) and an aerobic filter layer (3052) installed at the bottom of the plant layer (3051).

5. The multi-pool type sewage treatment device for a garden filter pool according to claim 4, characterized in that, The plant layer (3051) includes a floating plate (9) installed between the inner side walls of the biological filter tank (302), a reed layer (10) and a cyperus alternifolius layer (11) planted on the floating plate (9), and a biological rope (12) installed at the roots of the reed layer (10) and the roots of the cyperus alternifolius layer (11).

6. The multi-pool type sewage treatment device for garden filter pools according to claim 5, wherein, The aerobic filter layer (3052) includes an aeration pump (13) installed on the back side of the biological filter tank (302) by bolts, a filter material plate (14) installed at the bottom of the floating plate (9), and an aeration pipe (15) installed inside the filter material plate (14). The aeration pump (13) is connected to the aeration pipe (15) through a pipe. An electric rotary aeration head (16) is installed on the top of the aeration pipe (15), and the filter material plate (14) is made of volcanic rock material.

7. The multi-pool type sewage treatment device for garden filter ponds according to claim 2, characterized in that, The nitrogen and phosphorus removal structure (307)(306) includes a sulfur particle layer (3061) installed on the inner sidewall of the deep filter tank (303), a sulfur limestone mixed layer (3062) installed at the bottom of the sulfur particle layer (3061), and a limestone stabilizing layer (3063) installed at the bottom of the sulfur limestone mixed layer (3062). Anti-blocking holes are provided in the sulfur particle layer (3061), the sulfur limestone mixed layer (3062), and the limestone stabilizing layer (3063), and vertical air pipes are installed in the anti-blocking holes.

8. The multi-pool type sewage treatment device for a garden filter pool according to claim 2, characterized in that, The pathogen inactivation structure includes an ultraviolet germicidal lamp (3071) installed on the inner sidewall of the water storage tank (1) and a plant floating island (3072) installed inside the water storage tank (1). The plant floating island (3072) secretes bacteriostatic substances.

9. The multi-pool type sewage treatment device for a garden filter pool according to claim 4, wherein, An aeration fountain (17) is installed inside the water storage tank (1). The sedimentation and regulation tank (301) is connected to the biological filter tank (302) through a pipeline. The biological filter tank (302) is connected to the deep filter tank (303) through a pipeline. The deep filter tank (303) is connected to the water storage tank (1) through a drop pipe (18). An optical dissolved oxygen sensor is installed in the middle of the aerobic filter layer (3052). An ammonia nitrogen sensor is installed at the water outlet of the biological filter tank (302). A nitrate sensor is installed at the water outlet of the deep filter tank (303).

10. A method for using a multi-pool type sewage treatment device for a garden filter pool, characterized in that, The usage method is applied to the multi-tank type sewage treatment device for garden filter tanks as described in any one of claims 1-9, and specifically includes the following steps: Step 1: Sewage from municipal / garden areas is transported to the three-way pipe (5) through the sewage pipe (7), and then transported to the inside of the sedimentation and regulation tank (301) through the pump body (4) and the water inlet pipe (6). The suspended solids in the sewage are filtered through the suspended solid filtration structure (304). Step 2: The treated sewage enters the biological filter tank (302) through a pipeline. The organic matter in the sewage is degraded through the organic matter degradation structure (305), and the conversion of ammonia nitrogen is completed through aeration. Step 3: The treated sewage enters the deep filter tank (303) through a pipeline. The nitrogen and phosphorus in the sewage are removed through the nitrogen and phosphorus removal structure (307)(306). Step 4: The purified water enters the inside of the water storage tank (1) through the drop pipe (18), and the germs in the water are removed through the pathogen inactivation structure. Step 5: When it is necessary to purify the water in the water storage tank (1), the water in the water storage tank (1) is introduced into the inside of the sedimentation and regulation tank (301) through the pump body (4), the three-way pipe (5), and the circulation pipe (8), passes through the biological filter tank (302) and the deep filter tank (303) in sequence, and then returns to the inside of the water storage tank (1).

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