Vertical sewage treatment device for enhancing nitrogen and phosphorus removal

Abstract

The utility model relates to a vertical sewage treatment device for enhancing nitrogen and phosphorus removal, which comprises a vertical cylindrical treater, the vertical cylindrical treater internally comprises an anaerobic zone, an anoxic zone, an aerobic zone and a settling zone from bottom to top, a three-phase separation component is arranged between the anaerobic zone and the anoxic zone, and sludge in the anaerobic zone is retained and settled back to the anaerobic zone; a heavy ion microporous membrane component is arranged in the anoxic zone, a membrane tube is transversely arranged, and microorganisms are loaded on a membrane, so that synchronous nitrification and denitrification and short-cut nitrification and denitrification nitrogen removal are realized, and the total nitrogen removal rate is increased; a biological filler is arranged in the aerobic zone and is used for loading aerobic microorganisms; an inclined plate assembly and a composite filler layer are arranged in the settling zone and used for mud-water separation, the composite filler layer comprises a carbon source layer, a ceramsite layer, a phosphorus removal layer and a river sand layer from bottom to top, and the ceramsite layer loads denitrifying bacteria, so that a water body passing through the filler layer is sequentially subjected to denitrification treatment, phosphorus removal treatment and filtration treatment, and effluent reaches the standard.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage denitrification and phosphorus removal, and in particular relates to a vertical sewage treatment device for strengthening denitrification and phosphorus removal. Background Art

[0002] With the continuous improvement of my country's sewage treatment emission standards, traditional sewage treatment processes, such as activated sludge process, sequencing batch sludge process (SBR) and moving bed biofilm reactor (MBBR), can remove organic matter and nutrients in sewage to a certain extent, but generally have the following shortcomings: (1) They generally occupy a large area, which limits the distribution and expansion of sewage treatment facilities in cities and towns; (2) The operating costs of traditional sewage treatment processes are relatively high, mainly concentrated in aeration and the use of chemical agents; (3) The efficiency of nitrogen and phosphorus removal is still insufficient, especially in the treatment of sewage with high concentrations of nitrogen and phosphorus pollutants. The treatment effect of existing equipment is often unsatisfactory and difficult to meet the increasingly stringent environmental emission standards; in addition, the microbial activity and system stability in the process of nitrogen and phosphorus removal also need to be further improved. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the treatment effect of existing sewage treatment devices in nitrogen removal and phosphorus removal is often proportional to the consumption of chemical agents or carbon source consumption or energy consumption or land occupation. In an environment where resources are relatively tight in all aspects, the effect of nitrogen removal and phosphorus removal is difficult to effectively improve.

[0004] The utility model provides a vertical sewage treatment device for enhanced nitrogen and phosphorus removal, comprising a vertical cylindrical processor, wherein the interior of the vertical cylindrical processor comprises an anaerobic zone, an anoxic zone, an aerobic zone and a sedimentation zone from bottom to top, a three-phase separation component is arranged between the anaerobic zone and the anoxic zone, and the sludge in the anaerobic zone is retained and settled back to the anaerobic zone; a heavy ion microporous membrane component is arranged in the anoxic zone, and the membrane tube is arranged horizontally, and the membrane tube comprises a load membrane tube and a ventilation membrane tube, and microorganisms are loaded on the load membrane tube to realize synchronous nitrification and denitrification and short-range nitrification and denitrification, thereby improving the total nitrogen removal rate;

[0005] The aerobic zone is equipped with biological fillers for carrying aerobic microorganisms; the sedimentation zone is equipped with inclined plate components and composite filler layers for mud and water separation. The composite filler layers include a carbon source layer, a ceramsite layer, a phosphorus removal layer and a river sand layer from bottom to top. The ceramsite layer carries denitrifying bacteria, so that the water passing through the filler layer is then subjected to denitrification treatment, phosphorus removal treatment and filtration treatment in turn, so that the effluent meets the standards.

[0006] Optionally, anaerobic microorganisms are arranged in the anaerobic zone, and a main water inlet pipe and a sewage pipe are arranged at the bottom of the anaerobic zone, sewage is input into the anaerobic zone through the main water inlet pipe, and part of the sludge at the bottom of the anaerobic zone is discharged through the sewage pipe;

[0007] A three-phase separation assembly is provided on the top of the anaerobic zone. The three-phase separation assembly includes a plurality of three-phase separators. The plurality of three-phase separators are evenly arranged so that the three-phase separation assembly covers the cross-section of the anaerobic zone. The tops of the three-phase separators are connected to exhaust pipes. The exhaust pipes pass through the side walls of the vertical cylindrical processor to discharge the separated gas.

[0008] Further optionally, a first circulation pump is provided on the outer wall of the anaerobic zone, and a water inlet pipe of the first circulation pump passes through the side wall of the vertical cylindrical processor and is arranged below the three-phase separation component, so as to extract the sludge mixture separated by the three-phase separation component; a water outlet pipe of the first circulation pump passes through the side wall of the vertical cylindrical processor and is arranged at the lower part of the anaerobic zone, so as to return the sludge mixture to the bottom of the anaerobic zone, thereby realizing reflux inside the anaerobic zone and retaining the sludge amount in the anaerobic zone.

[0009] Optionally, the heavy ion microporous membrane assembly includes a plurality of membrane tubes, which are evenly arranged in an array in the anoxic zone, with the axial direction of the membrane tubes being horizontal, the left ends of the plurality of membrane tubes being connected and supported by a left assembly frame, and the right ends of the plurality of membrane tubes being connected and supported by a right assembly frame, the left assembly frame being hollow inside and connected to the left ends of the membrane tubes, the right assembly frame being hollow inside and connected to the right ends of the membrane tubes, the air supply pipe passing through the side wall of the vertical cylindrical processor and connected to the left assembly frame or the right assembly frame to supply air to the membrane tubes, and the air outlet pipe passing through the side wall on the opposite side of the vertical cylindrical processor and connected to the right assembly frame or the left assembly frame to discharge exhaust gas for the membrane tubes.

[0010] Further optionally, in the heavy ion microporous membrane assembly, half of the membrane tubes are load membrane tubes, and the other half of the membrane tubes are ventilation membrane tubes; both ends of the load membrane tubes are closed, that is, the component racks on the left and right sides are not connected, and the membrane tubes are loaded with microorganisms to play a biochemical role;

[0011] The two ends of the ventilation membrane tube are connected to the right component rack and the left component rack to supply air to the ventilation membrane tube. The ventilation membrane tube is not loaded with microorganisms and can intercept the sludge in the anoxic zone to prevent the sludge from entering the aerobic zone.

[0012] Further optionally, the load membrane tube is located at the lower part of the heavy ion microporous membrane assembly, and the ventilation membrane tube is located at the upper part of the heavy ion microporous membrane assembly.

[0013] Optionally, the membrane surface of the load membrane tube is loaded with short-range nitrification functional bacteria, anaerobic ammonia oxidation functional bacteria, sulfur autotrophic denitrification functional bacteria and iron ammonia oxidation functional bacteria. The number and length of the load membrane tube and the ventilation membrane tube are adjusted according to actual treatment requirements.

[0014] Optionally, in the sedimentation zone, an inclined plate assembly is arranged below the composite filler layer, and the inclined plate assembly includes a plurality of inclined plates arranged side by side, which separates mud and water from the water flowing through the sedimentation zone, and the water with a small amount of mud rises and passes through the composite filler layer; a water outlet pipe is arranged at the top of the sedimentation zone to discharge the treated water;

[0015] A second circulation pump is arranged on the outside of the vertical cylindrical processor for returning part of the water in the sedimentation area to the bottom of the anoxic area.

[0016] Further optionally, the carbon source layer of the composite filler layer is a polyhydroxyalkanoate layer, the ceramsite layer is formed by stacking ceramsite, denitrifying bacteria are loaded on the ceramsite, the phosphorus removal layer includes a zero-valent iron layer below and a lanthanum chloride layer above, and the river sand layer is formed by stacking river sand.

[0017] The vertical sewage treatment device for enhanced nitrogen and phosphorus removal described in the utility model has the following beneficial effects:

[0018] (1) The vertical cylindrical processor occupies a small area, and the anaerobic zone, anoxic zone, aerobic zone, sedimentation zone and effluent zone are arranged vertically, while also being able to achieve a complete biological treatment function;

[0019] (2) A heavy ion microporous membrane assembly is set in the anoxic zone, and microorganisms are loaded on the membrane to achieve simultaneous nitrification and denitrification and short-range nitrification and denitrification, thereby improving the overall utilization rate of the carbon source of the device and thus improving the total nitrogen removal rate; the membrane tube is placed horizontally, which can intercept a part of the activated sludge on the membrane surface, increase the sludge amount in the anoxic zone, and thus improve the denitrification effect of the anoxic zone;

[0020] (3) The composite filler layer replaces the traditional filter material filler layer, and there is no need to set up a backwash device. The composite filler layer can provide a carbon source for denitrification treatment, then remove phosphorus, and finally filter treatment to improve the effluent water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the vertical sewage treatment device for enhanced nitrogen and phosphorus removal;

[0022] Figure 2 Schematic diagram of the composite filler layer.

[0023] In the accompanying drawings, 1-vertical cylindrical processor, 2-anaerobic zone, 3-anoxic zone, 4-aerobic zone, 5-sedimentation zone, 6-three-phase separation component, 7-heavy ion microporous membrane component, 8-membrane tube, 9-inclined plate component, 10-composite filler layer, 11-main water inlet pipe, 12-drain pipe, 13-first circulation pump, 14-second circulation pump, 15-left component rack, 16-right component rack, 17-aeration pipe, 18-outlet pipe, 19-carbon source layer, 20-ceramsite layer, 21-zero-valent iron layer, 22-lanthanum chloride layer, 23-river sand layer. DETAILED DESCRIPTION

[0024] This embodiment provides a vertical sewage treatment device for enhancing nitrogen and phosphorus removal, such as Figure 1-Figure 2 As shown, it includes a vertical cylindrical processor 1, and the interior of the vertical cylindrical processor 1 includes an anaerobic zone 2, an anoxic zone 3, an aerobic zone 4 and a sedimentation zone 5 from bottom to top. A three-phase separation component 6 is provided between the anaerobic zone 2 and the anoxic zone 3 to retain and settle the sludge in the anaerobic zone 2 back to the anaerobic zone 2; a heavy ion microporous membrane component 7 is provided in the anoxic zone 3, and a membrane tube 8 is placed horizontally. The membrane tube includes a load membrane tube and a ventilation membrane tube. Microorganisms are loaded on the load membrane tube to achieve synchronous nitrification and denitrification and short-range nitrification and denitrification, thereby improving the total nitrogen removal rate;

[0025] The aerobic zone 4 is provided with biological fillers for carrying aerobic microorganisms; the sedimentation zone 5 is provided with inclined plate components 9 and a composite filler layer 10 for mud-water separation, the composite filler layer 10 comprises a carbon source layer 19, a ceramsite layer 20, a phosphorus removal layer and a river sand layer 23 from bottom to top, the ceramsite layer 20 carries denitrifying bacteria, so that the water body passing through the filler layer is then subjected to denitrification treatment, phosphorus removal treatment and filtration treatment in sequence, so that the effluent meets the standards.

[0026] Anaerobic microorganisms are arranged in the anaerobic zone 2. A main water inlet pipe 11 and a sewage pipe 12 are arranged at the bottom of the anaerobic zone 2. Sewage is input into the anaerobic zone 2 through the main water inlet pipe 11, and part of the sludge at the bottom of the anaerobic zone 2 is discharged through the sewage pipe 12.

[0027] A three-phase separation assembly 6 is provided at the top of the anaerobic zone 2. The three-phase separation assembly 6 includes a plurality of three-phase separators. The plurality of three-phase separators are evenly arranged so that the three-phase separation assembly 6 covers the cross-section of the anaerobic zone 2. The tops of the three-phase separators are connected to exhaust pipes. The exhaust pipes pass through the side walls of the vertical cylindrical processor 1 to discharge the separated gas.

[0028] A first circulation pump 13 is provided on the outer wall of the anaerobic zone 2. The water inlet pipe of the first circulation pump 13 passes through the side wall of the vertical cylindrical processor 1 and is provided below the three-phase separation component 6, and is used to extract the sludge mixture separated by the three-phase separation component 6. The water outlet pipe 18 of the first circulation pump 13 passes through the side wall of the vertical cylindrical processor 1 and is provided at the lower part of the anaerobic zone 2, and returns the sludge mixture to the bottom of the anaerobic zone 2, thereby realizing the reflux inside the anaerobic zone 2 and retaining the sludge amount in the anaerobic zone 2.

[0029] The sewage enters the anaerobic zone 2 and undergoes anaerobic treatment. The gas generated in the anaerobic zone 2 is separated and discharged by the three-phase separation component 6, and the sludge returns to the inside of the anaerobic zone 2.

[0030] The heavy ion microporous membrane assembly 7 includes a plurality of membrane tubes 8, which are evenly arranged in an array in the anoxic zone 3, and the axial direction of the membrane tubes 8 is horizontal. The left ends of the plurality of membrane tubes 8 are connected and supported by a left assembly rack 15, and the right ends of the plurality of membrane tubes 8 are connected and supported by a right assembly rack 16. The left assembly rack 15 is hollow inside and can communicate with the left end of the membrane tube 8, and the right assembly rack 16 is hollow inside and can communicate with the right end of the membrane tube 8. The air supply pipe penetrates the side wall of the vertical cylindrical processor 1 and is connected to the left assembly rack 15 or the right assembly rack 16 to supply air to the membrane tube 8, and the air outlet pipe penetrates the side wall of the opposite side of the vertical cylindrical processor 1 and is connected to the right assembly rack 16 or the left assembly rack 15 to discharge tail gas for the membrane tube 8.

[0031] The membrane material of the membrane tube 8 is a conventional heavy ion microporous membrane or heavy ion nuclear pore membrane in the art, that is, a PET membrane with non-woven fabrics on both sides, and a three-layer membrane material. The heavy ion microporous membrane assembly is provided with five layers of membrane tubes, each layer having 8 membrane tubes.

[0032] In the heavy ion microporous membrane assembly 7, half of the membrane tubes 8 are load membrane tubes 8, and the other half of the membrane tubes 8 are ventilation membrane tubes 8; both ends of the load membrane tubes 8 are closed, that is, the assembly racks on the left and right sides are not connected, and the membrane tubes 8 are loaded with microorganisms to play a biochemical role;

[0033] Both ends of the ventilation membrane tube 8 are connected to the right component rack 16 and the left component rack 15 to supply air to the ventilation membrane tube 8. The ventilation membrane tube 8 is not loaded with microorganisms and can intercept the sludge in the anoxic zone 3 to prevent the sludge from entering the aerobic zone 4.

[0034] The load membrane tube 8 is located at the lower part of the heavy ion microporous membrane assembly 7 , and the ventilation membrane tube 8 is located at the upper part of the heavy ion microporous membrane assembly 7 .

[0035] The membrane surface of the load membrane tube 8 is loaded with short-range nitrification functional bacteria, anaerobic ammonia oxidation functional bacteria, sulfur autotrophic denitrification functional bacteria, and iron ammonia oxidation functional bacteria.

[0036] After the sewage enters the anoxic zone 3, it flows upward through the heavy ion microporous membrane assembly 7, and first passes through the load membrane tube 8. Under the joint action of its various microorganisms, it realizes simultaneous nitrification and denitrification and short-range nitrification and denitrification, improves the overall utilization rate of the system for carbon sources, and thus improves the total nitrogen removal rate. The upper ventilation membrane tube 8 can intercept the sludge in the anoxic zone 3, maintain the amount of sludge in the anoxic zone 3, and appropriately compensate oxygen for the anoxic zone 3.

[0037] An aeration pipe 17 is provided at the bottom of the aerobic zone 4 , and the aeration pipe 17 is connected to an external aeration device to provide oxygen for the aerobic zone 4 .

[0038] In the sedimentation zone 5, the inclined plate assembly 9 is arranged below the composite filler layer 10. The inclined plate assembly 9 includes 14 inclined plates arranged side by side, which separate mud and water from the water flowing through the sedimentation zone 5. The sludge falls into the aerobic zone 4; the water with a small amount of mud rises through the composite filler layer 10; the top of the sedimentation zone 5 is provided with a water outlet pipe 18 to discharge the treated water;

[0039] A second circulation pump 14 is provided on the outside of the vertical cylindrical processor 1 for returning part of the water in the sedimentation zone 5 to the bottom of the anoxic zone 3 .

[0040] The carbon source layer 19 of the composite filler layer 10 is a polyhydroxyalkanoate layer, the ceramsite layer 20 is formed by stacking ceramsite, denitrifying bacteria are loaded on the ceramsite, the phosphorus removal layer includes a zero-valent iron layer 21 below and a lanthanum chloride layer 22 above, and the river sand layer 23 is formed by stacking river sand. The thickness of the carbon source layer, ceramsite layer, zero-valent iron layer, lanthanum chloride layer, and river sand layer are 100-150mm, 100-150mm, 80-100mm, 100-200mm, and 200-300mm, respectively. In this embodiment, the thickness of the above layers is 150mm, 150mm, 100mm, 120mm, and 250mm, respectively.

[0041] The sewage passes through the composite filler layer 10 from bottom to top. At this time, there is less residual carbon source in the water body, making it difficult to denitrify. The polyhydroxyalkanoates in the carbon source layer 19 have a good carbon source slow release effect, which can provide sufficient carbon source for denitrification. The ceramsite is used as a carrier of denitrifying bacteria. The carbon source released by the polyhydroxyalkanoates is fully utilized by the denitrifying bacteria on the ceramsite, and part of the total nitrogen is removed through the denitrification process. After the total nitrogen is removed, the sewage continues to rise and passes through the zero-valent iron layer 21 and the lanthanum chloride layer 22. The zero-valent iron is corroded to produce Fe 2+ , and then oxidized to Fe under microaerobic conditions 3+ , Fe 3+ Combined with phosphate ions in the water, it forms an insoluble iron phosphate precipitate; lanthanum chloride reacts chemically with phosphate to form water-insoluble lanthanum phosphate (LaPO4) precipitate. As the water body continues to rise, the iron phosphate precipitate and lanthanum phosphate precipitate are filtered through the river sand at the end, ensuring that the SS of the outlet water is at a low level.

[0042] Taking a rural sewage treatment station as an example, the daily processing capacity is 50 tons, and the average influent water quality is: COD is 156 mg / L, TP is 3.42 mg / L, TN is 37.7 mg / L, NH3-N is 32.4 mg / L, SS is 150 mg / L; the reflux ratio is 200%.

[0043] In this embodiment, without the additional addition of carbon source and phosphorus removal agent, the average effluent water quality is: COD is 12.6 mg / L, and the removal rate is 92%; TP is 0.48 mg / L, and the removal rate is 86%; TN is 15.9 mg / L, and the removal rate is 58%; NH3-N is 1.37 mg / L, and the removal rate is 96%, SS is 5 mg / L, and the removal rate is 97%. It can be seen that the treatment effect of the vertical sewage treatment device in this embodiment is better.

[0044] If the heavy ion microporous membrane component of this embodiment is removed and the composite filler layer is replaced with an ordinary river sand layer of the same thickness, the TP removal rate of the effluent is 81%, the TN removal rate is 48%, the NH3-N removal rate is 87%, and the SS removal rate is 84%. It can be seen that the heavy ion microporous membrane component and the composite filler layer have a role in improving the overall nitrogen and phosphorus removal.

Claims

1. A vertical sewage treatment device for enhanced nitrogen and phosphorus removal, characterized in that: It includes a vertical cylindrical processor, which includes an anaerobic zone, an anoxic zone, an aerobic zone and a sedimentation zone from bottom to top. A three-phase separation component is provided between the anaerobic zone and the anoxic zone to retain and settle the sludge in the anaerobic zone back to the anaerobic zone; a heavy ion microporous membrane component is provided in the anoxic zone, and the membrane tube is placed horizontally. The membrane tube includes a load membrane tube and a ventilation membrane tube. Microorganisms are loaded on the load membrane tube to achieve simultaneous nitrification and denitrification and short-range nitrification and denitrification, thereby improving the total nitrogen removal rate; The aerobic zone is equipped with biological fillers for carrying aerobic microorganisms; the sedimentation zone is equipped with inclined plate components and composite filler layers for mud and water separation. The composite filler layers include a carbon source layer, a ceramsite layer, a phosphorus removal layer and a river sand layer from bottom to top. The ceramsite layer carries denitrifying bacteria, so that the water passing through the filler layer is then subjected to denitrification treatment, phosphorus removal treatment and filtration treatment in turn, so that the effluent meets the standards.

2. The vertical sewage treatment device for enhanced nitrogen and phosphorus removal according to claim 1 is characterized in that: Anaerobic microorganisms are arranged in the anaerobic zone, and a main water inlet pipe and a sewage pipe are arranged at the bottom of the anaerobic zone. Sewage is input into the anaerobic zone through the main water inlet pipe, and part of the sludge at the bottom of the anaerobic zone is discharged through the sewage pipe.

3. The vertical sewage treatment device for enhanced nitrogen and phosphorus removal according to claim 1 is characterized in that: A three-phase separation assembly is provided on the top of the anaerobic zone. The three-phase separation assembly includes a plurality of three-phase separators. The plurality of three-phase separators are evenly arranged so that the three-phase separation assembly covers the cross-section of the anaerobic zone. The tops of the three-phase separators are connected to exhaust pipes. The exhaust pipes pass through the side walls of the vertical cylindrical processor to discharge the separated gas.

4. The vertical sewage treatment device for enhanced nitrogen and phosphorus removal according to claim 3 is characterized in that: A first circulation pump is provided on the outer wall of the anaerobic zone. The water inlet pipe of the first circulation pump passes through the side wall of the vertical cylindrical processor and is arranged below the three-phase separation component, and is used to extract the sludge mixture separated by the three-phase separation component. The water outlet pipe of the first circulation pump passes through the side wall of the vertical cylindrical processor and is arranged at the lower part of the anaerobic zone, and returns the sludge mixture to the bottom of the anaerobic zone, thereby realizing reflux inside the anaerobic zone and retaining the sludge amount in the anaerobic zone.

5. The vertical sewage treatment device for enhanced nitrogen and phosphorus removal according to claim 1 is characterized in that: The heavy ion microporous membrane assembly includes a plurality of membrane tubes, which are evenly arranged in an array in the anoxic zone, and the axial direction of the membrane tubes is horizontal. The left ends of the plurality of membrane tubes are connected and supported by a left assembly frame, and the right ends of the plurality of membrane tubes are connected and supported by a right assembly frame. The left assembly frame is hollow inside and can be connected to the left end of the membrane tube, and the right assembly frame is hollow inside and can be connected to the right end of the membrane tube. The air supply pipe penetrates the side wall of the vertical cylindrical processor and is connected to the left assembly frame or the right assembly frame to supply air to the membrane tube, and the air outlet pipe penetrates the side wall on the opposite side of the vertical cylindrical processor and is connected to the right assembly frame or the left assembly frame to discharge tail gas for the membrane tube.

6. The vertical sewage treatment device for enhanced nitrogen and phosphorus removal according to claim 5 is characterized in that: In the heavy ion microporous membrane assembly, half of the membrane tubes are load membrane tubes, and the other half are ventilation membrane tubes; both ends of the load membrane tubes are closed and are not connected to the component racks on the left and right sides; the load membrane tubes are loaded with microorganisms to play a biochemical role; The two ends of the ventilation membrane tube are connected to the right component rack and the left component rack to supply air to the ventilation membrane tube. The ventilation membrane tube is not loaded with microorganisms and can intercept the sludge in the anoxic zone to prevent the sludge from entering the aerobic zone.

7. The vertical sewage treatment device for enhanced nitrogen and phosphorus removal according to claim 6 is characterized in that: The load membrane tube is located at the lower part of the heavy ion microporous membrane assembly, and the ventilation membrane tube is located at the upper part of the heavy ion microporous membrane assembly.

8. The vertical sewage treatment device for enhanced nitrogen and phosphorus removal according to claim 7 is characterized in that: The membrane surface of the loaded membrane tube is loaded with short-range nitrification functional bacteria, anaerobic ammonia oxidation functional bacteria, sulfur autotrophic denitrification functional bacteria and iron ammonia oxidation functional bacteria.

9. The vertical sewage treatment device for enhanced nitrogen and phosphorus removal according to claim 1, characterized in that: In the sedimentation area, the inclined plate assembly is arranged below the composite filler layer. The inclined plate assembly includes a plurality of inclined plates arranged side by side, which separates mud and water from the water flowing through the sedimentation area. The water with a small amount of mud rises and passes through the composite filler layer. A water outlet pipe is arranged at the top of the sedimentation area to discharge the treated water. A second circulation pump is arranged on the outside of the vertical cylindrical processor for returning part of the water in the sedimentation area to the bottom of the anoxic area.

10. The vertical sewage treatment device for enhanced nitrogen and phosphorus removal according to claim 9, characterized in that: The carbon source layer of the composite filler layer is a polyhydroxyalkanoate layer, the ceramsite layer is formed by stacking ceramsite, denitrifying bacteria are loaded on the ceramsite, the phosphorus removal layer includes a zero-valent iron layer below and a lanthanum chloride layer above, and the river sand layer is formed by stacking river sand.

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