Efficient biological nitrogen and phosphorus removal sewage treatment device

Abstract

The invention discloses an efficient biological nitrogen and phosphorus removal sewage treatment device which comprises a working plane, a biological dephosphorization module is arranged on the working plane, a biological denitrification module is arranged on one side of the biological dephosphorization module, a suction device is arranged between the biological dephosphorization module and the biological denitrification module, a stirring device is arranged on the biological denitrification module, and a water inlet pipe is mounted on one side of the working plane; according to the sewage treatment device, a water inlet pipe is connected with an external sewage pipe, sewage enters the first treatment box through the water inlet pipe, the sewage firstly passes through a filter net basket to intercept large-particle impurities, a first box cover is clamped into the first treatment box, a biological agent is added through a first adding pipe, and then a first pipe cover is plugged into the first adding pipe; at the moment, the first treatment box and the first box cover are matched to form an anoxic environment for phosphorus removal and precipitation, the sewage subjected to phosphorus removal is sucked into the second treatment box through a suction device, a biological agent is added into the second treatment box, and then air is continuously inflated into the second treatment box through an air pump, so that an oxygen-enriched environment is formed for nitrogen removal.

Description

Technical Field

[0001] The invention relates to the technical field of urban sewage treatment and resource utilization, and in particular to a high-efficiency biological nitrogen and phosphorus removal sewage treatment device. Background Art

[0002] Biological denitrification and phosphorus removal technology has become one of the key technical paths for urban sewage and industrial wastewater treatment. Its main goal is to effectively remove nutrients such as nitrogen and phosphorus in water bodies, thereby preventing eutrophication of water bodies, avoiding algae outbreaks, water quality deterioration and ecosystem disorder. The traditional biological denitrification process mainly relies on nitrification and denitrification: under aerobic conditions, ammonia nitrogen (NH 4 + ) is oxidized by nitrifying bacteria to nitrite (NO 2 - ) and nitrate (NO 3 - Subsequently, in anoxic environments, denitrifying bacteria reduce nitrate to nitrogen gas (N 2 ), to achieve the removal of nitrogen. In terms of phosphorus removal, it mainly relies on the metabolic characteristics of polyphosphate organisms (PAOs) in anaerobic phosphorus release and aerobic excess phosphorus uptake, and the purpose of phosphorus removal is achieved by discharging phosphorus-rich sludge.

[0003] The current mainstream processes such as A² / O (anaerobic-anoxic-aerobic), SBR (sequencing batch reactor), UCT, oxidation ditch, etc., all achieve synchronous or step-by-step nitrogen and phosphorus removal reactions by setting different reaction zones and hydraulic control modes. These processes have a good foundation in terms of operational stability, processing load adaptability and economy, and are widely used in the field of urban domestic sewage treatment.

[0004] However, in practical applications, existing sewage treatment equipment still faces a number of technical bottlenecks and engineering difficulties, mainly including the following aspects: (1) Low efficiency of sludge and impurity separation. Traditional equipment is mostly centralized mixed treatment, and the effluent contains a large amount of sludge particles and suspended impurities that have not been fully settled. It is necessary to set up a secondary sedimentation tank or membrane filtration device for subsequent treatment, which increases the process complexity and operating costs. (2) Limited nitrification efficiency. The contact efficiency between nitrifying bacteria and ammonia nitrogen in some equipment is low. Especially under high load or short process conditions, the nitrification reaction is not dynamic, resulting in low nitrogen removal rate. (3) Unstable dephosphorization process. The activity of polyphosphate bacteria is greatly affected by temperature, water quality, sludge age, etc. The system is prone to "phosphorus release without phosphorus uptake", resulting in excessive phosphorus in the effluent. (4) Energy consumption and space occupation problems: Conventional processes require multi-stage tanks, circulating pump stations, and complex aeration systems. The equipment occupies a large area and consumes high energy, which is difficult to meet the current needs of green and low-carbon development.

[0005] In order to solve the above problems and promote the further development of sewage denitrification and phosphorus removal technology, it is necessary to carry out systematic optimization in terms of device structure, reaction process and sludge separation method. Existing sewage treatment devices cannot remove impurities and sludge in water after sewage treatment. Common devices treat sludge, impurities and water together. The treated sewage needs to be filtered and precipitated twice, which increases the process steps. In addition, the existing treatment devices are less efficient in nitrification reaction denitrification, and the nitrifying bacteria are poorly mixed with the nitrogen elements in the water. Therefore, a high-efficiency biological denitrification and phosphorus removal sewage treatment device is needed to meet people's needs. Summary of the invention

[0006] The object of the present invention is to provide a high-efficiency biological denitrification and phosphorus removal sewage treatment device to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: a high-efficiency biological denitrification and phosphorus removal sewage treatment device, comprising a working plane; a biological dephosphorization module is provided on the working plane, a biological denitrification module is provided on one side of the biological dephosphorization module, a suction device is provided between the biological dephosphorization module and the biological denitrification module, a stirring device is provided on the biological denitrification module, a water inlet pipe is installed on one side of the working plane, and a water outlet pipe is installed on one side of the biological denitrification module; Preferably, the biological dephosphorization module includes a first processing box, which is installed on a working plane, a filter basket is installed in the first processing box, a first box cover is installed above the first processing box, locking tongues are installed on both sides of the first processing box, and lock buckles are rotatably installed on both sides of the first box cover, and the lock buckles are adapted to the lock tongues.

[0008] Preferably, a filter tank is provided in the first processing box, the filter basket is installed in the filter tank, a fixing ear is installed on the filter basket, a fixing bolt is installed on the fixing ear, and the filter basket is fixed in the first processing box by the fixing bolt.

[0009] Preferably, a first addition port is formed on the first box cover, a first addition tube is installed in the first addition port, and a first tube cover is installed in the first addition tube.

[0010] Preferably, a first water inlet is opened on one side of the first box cover, the water inlet pipe is installed in the first water inlet, and a first water outlet is opened on one side of the first processing box.

[0011] Preferably, the biological denitrification module includes a second treatment box, which is installed on a working plane, a bottom air stone is installed in the second treatment box, a biochemical sponge is installed above the bottom air stone, an air pump is installed above the second treatment box, an air pipe is installed on the air pump, and the air pipe is connected to the bottom air stone.

[0012] Preferably, a second addition port is opened on the top of the second processing box, a second addition pipe is installed in the second addition port, and a second pipe cover is installed in the second addition pipe.

[0013] Preferably, the second processing box has an air inlet on one side, the air pipe is installed in the air inlet, the second processing box has a second water inlet on the side away from the air inlet, the second processing box has a second water outlet on the side close to the air inlet, and the water outlet pipe is installed in the second water outlet.

[0014] Preferably, the suction device includes a connecting box, which is installed between the first treatment box and the second treatment box. A water pump is installed in the connecting box, and a water suction hose and a water outlet hose are respectively installed on the water pump. The water suction hose passes through the first water outlet and is installed in the first treatment box, and the water outlet hose is installed in the second water inlet. A top connecting block is installed at one end of the water suction hose, a partition mesh is installed on the top connecting block, and a sinking block is installed below the partition mesh.

[0015] Preferably, the stirring device comprises a first motor, the first motor is mounted on the upper surface of the second processing box, the first motor is mounted with a first rotating shaft, the first rotating shaft is mounted with a stirring fan, and the stirring fan is mounted in the second processing box. Preferably, a ball valve is rotatably installed in the water outlet pipe, and a rotating disk is installed on the ball valve.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) Integrated nitrogen and phosphorus removal partition structure design to improve treatment efficiency The present invention clearly divides the sewage treatment process into two stages: the first treatment box is used for anoxic phosphorus removal, and the second treatment box is used for aerobic nitrogen removal. By separating the reaction environment in a structure, the phenomenon of reduced treatment efficiency caused by oxygen mixing into the anaerobic or anoxic zone in the traditional process is effectively avoided. In particular, the sealing and matching design of the first treatment box forms a stable anoxic state, which is conducive to the release of phosphorus by polyphosphate bacteria and the realization of phosphorus precipitation, thereby improving the phosphorus removal efficiency.

[0017] (2) Set up filter baskets and separation mesh plates to achieve efficient isolation of impurities and sludge This device is equipped with a filter basket when sewage enters the primary stage, which can intercept large particles of solid matter in advance, reduce the burden on subsequent reaction units, and extend the stable operation cycle of the system; in the second treatment stage, a separation mesh plate is set during the suction process to prevent bottom mud, scum, etc. from being sucked into the second treatment tank, thereby improving the system operation safety and pump body service life and reducing maintenance frequency.

[0018] (3) The bottom water suction hose is designed with a sinking block to improve the accuracy of water extraction A positionable water suction hose structure is adopted, and it is accurately placed above the sludge layer in the first treatment tank through a sinking block, so that the supernatant is used first during the extraction process. This can not only prevent the suction of suspended matter that has not been completely settled, but also reduce the disturbance of the bottom mud, and improve the stability and clarity of the extracted sewage.

[0019] (4) Air pump and biological agent are added simultaneously to enhance the efficiency of aerobic denitrification An air pump is set in the second treatment box to continuously supply oxygen, and biological agents are added to form an oxygen-rich environment while enhancing the activity of denitrifying bacteria to achieve rapid nitrogen conversion. At the same time, continuous oxygen injection can maintain an appropriate DO level in the reactor to ensure the efficiency of the nitrification process.

[0020] (5) The stirring system strengthens the mass transfer process and improves the effect of microbial action In order to solve the problem of uneven distribution of oxygen, biological agents and sewage, the present invention designs a rotating stirring mechanism in the second treatment box, and drives the stirring fan blades to run continuously by a motor to promote uniform flow of water, thereby accelerating the reaction rate, improving the nitrification reaction effect, and avoiding the occurrence of local low dissolved oxygen or agent accumulation.

[0021] (6) Biological agents are added in different time periods to form zoning functions and enhance biodiversity The device allows users to add different types of biological agents, such as anaerobic polyphosphate bacteria, denitrifying bacteria, etc., into the first and second treatment tanks in stages according to sewage characteristics and treatment requirements. By complementing the advantages of the bacterial flora, the stability of the functional microbial community in the system and the durability of the purification function are improved.

[0022] (7) The system has a compact structure, takes up little space, is flexible to adapt, and is suitable for distributed processing scenarios The device of the present invention has a high degree of structural integration and does not require a large secondary sedimentation tank or an independent reaction tank. It is suitable for application scenarios such as small and medium-sized sewage stations, rural sewage treatment facilities, and landscape water purification systems, and has good practical promotion potential.

[0023] (8) Simple process control, easy to automate and intelligently upgrade Each key processing unit (such as air pump, water pump, motor) is equipped with a standard electronic control interface to facilitate PLC control system access or remote monitoring upgrades. It can be linked with the water quality sensor module to achieve online feedback control and improve the system's intelligent operation level. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of a high-efficiency biological denitrification and phosphorus removal sewage treatment device proposed by the present invention; Figure 2 This is a schematic diagram of the structure of the second treatment tank and the outlet pipe of a high-efficiency biological denitrification and phosphorus removal sewage treatment device proposed by the present invention; Figure 3 This is a schematic diagram of the structure of a connection box and a first treatment box of a high-efficiency biological denitrification and phosphorus removal sewage treatment device proposed by the present invention; Figure 4 This is a schematic diagram of the structure of the first treatment box and filter basket and other structures of a high-efficiency biological denitrification and phosphorus removal sewage treatment device proposed by the present invention; Figure 5 This is a schematic diagram of the structure of the first tank cover and the first water inlet and other structures of a high-efficiency biological denitrification and phosphorus removal sewage treatment device proposed by the present invention; Figure 6 A schematic diagram of the structure of a water suction hose and a water discharge hose of a high-efficiency biological denitrification and phosphorus removal sewage treatment device proposed by the present invention; Figure 7 This is a schematic diagram of the structure of a sinking block and a partitioning mesh plate and other structures of a high-efficiency biological denitrification and phosphorus removal sewage treatment device proposed by the present invention; Figure 8 A schematic diagram of the structure of the bottom gas stone and biochemical sponge of a high-efficiency biological denitrification and phosphorus removal sewage treatment device proposed by the present invention; Fig. 9 This is a schematic diagram of the structure of a ball valve and a rotating disk and other structures of a high-efficiency biological denitrification and dephosphorization sewage treatment device proposed by the present invention; Fig.10 This is a schematic diagram of the structure of a first motor and a stirring fan and other structures of a high-efficiency biological denitrification and phosphorus removal sewage treatment device proposed by the present invention.

[0025] In the figure: 1, working plane; 2, biological dephosphorization module; 3, biological denitrification module; 4, suction device; 5, stirring device; 6, water inlet pipe; 7, water outlet pipe; 8, ball valve; 9, rotating disk; 200, first treatment box; 201, filter tank; 202, filter basket; 203, fixing ear; 204, fixing bolt; 205, first water outlet; 206, first box cover; 207, first water inlet; 208, first addition port; 209, first addition pipe; 210, first pipe cover; 211, lock; 212, lock tongue; 3 00, second treatment box; 301, air pump; 302, air pipe; 303, air inlet; 304, bottom air stone; 305, biochemical sponge; 306, second water outlet; 307, second water inlet; 308, second addition port; 309, second addition pipe; 310, second pipe cover; 400, connection box; 401, water pump; 402, water suction hose; 403, water outlet hose; 404, sinking block; 405, partition mesh plate; 406, top connection block; 500, first motor; 501, first rotating shaft; 502, stirring fan. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1: Please refer to Figure 1-10 The present invention provides a technical solution: a high-efficiency biological denitrification and phosphorus removal sewage treatment device, comprising a working plane 1; in order to improve the sewage treatment efficiency and remove sludge and impurities in the water during the treatment, a biological dephosphorization module 2 is provided on the working plane 1, a biological denitrification module 3 is provided on one side of the biological dephosphorization module 2, a suction device 4 is provided between the biological dephosphorization module 2 and the biological denitrification module 3, a stirring device 5 is provided on the biological denitrification module 3, an inlet pipe 6 is installed on one side of the working plane 1, and an outlet pipe 7 is installed on one side of the biological denitrification module 3, biological dephosphorization and nitrogen removal are performed through the biological dephosphorization module 2 and the biological denitrification module 3, sewage is transferred from the biological dephosphorization module 2 to the biological denitrification module 3 through the suction device 4, and the efficiency of denitrification treatment is improved through the stirring device 5; In order to realize the function of biological treatment of sewage, the biological dephosphorization module 2 includes a first treatment box 200, which is installed on the working plane 1. A filter basket 202 is installed in the first treatment box 200, and a first box cover 206 is installed above the first treatment box 200. Lock tongues 212 are installed on both sides of the first treatment box 200, and lock buckles 211 are rotatably installed on both sides of the first box cover 206. The lock buckles 211 are adapted to the lock tongues 212. A filter tank 201 is opened in the first treatment box 200, and the filter basket 202 is installed in the filter tank 201. A fixing ear 203 is installed on the filter basket 202, and a fixing bolt 204 is installed on the fixing ear 203. The filter basket 202 is fixed in the first treatment box 200 by the fixing bolt 204. A first addition port 208 is provided on a box cover 206, a first addition pipe 209 is installed in the first addition port 208, a first pipe cover 210 is installed in the first addition pipe 209, a first water inlet 207 is provided on one side of the first box cover 206, a water inlet pipe 6 is installed in the first water inlet 207, a first water outlet 205 is provided on one side of the first treatment box 200, the biological denitrification module 3 includes a second treatment box 300, the second treatment box 300 is installed on the working plane 1, a bottom gas stone 304 is installed in the second treatment box 300, a biochemical sponge 305 is installed above the bottom gas stone 304, an air pump 301 is installed above the second treatment box 300, an air pipe 302 is installed on the air pump 301, the air pipe 302 is connected to the bottom gas stone 304, and the second treatment box 30 0 is provided with a second addition port 308 on the top, a second addition pipe 309 is installed in the second addition port 308, a second pipe cover 310 is installed in the second addition pipe 309, an air inlet 303 is provided on one side of the second treatment box 300, the air pipe 302 is installed in the air inlet 303, a second water inlet 307 is provided on the side of the second treatment box 300 away from the air inlet 303, a second water outlet 306 is provided on the side of the second treatment box 300 close to the air inlet 303, a water outlet pipe 7 is installed in the second water outlet 306, a ball valve 8 is rotatably installed in the water outlet pipe 7, a rotating disk 9 is installed on the ball valve 8, when in use, the water inlet pipe 6 is first connected to the external sewage pipe, the sewage enters the first treatment box 200 through the water inlet pipe 6, and the sewage is first intercepted by the filter basket 202 The large particles of impurities and the intercepted sewage will fall into the first treatment box 200. The first treatment box 200 and the first box cover 206 are fixed by the lock buckle 211 and the lock tongue 212. After adding the biological agent through the first addition tube 209, the first tube cover 210 is inserted into the first addition tube 209. At this time, the first treatment box 200 and the first box cover 206 form a relatively closed space, which can form an anoxic environment. The biological agent is used to remove phosphorus from the sewage. The sewage is allowed to stand in the first treatment box 200 to precipitate sludge. The sewage after phosphorus removal is sucked into the second treatment box 300 through the suction device 4. After adding the biological agent into the second treatment box 300, the bottom gas stone 304 is inflated through the air pump 301. The bottom gas stone 304 can form rich and dense bubbles.The gas rises and enters the water body through the biochemical sponge 305. The biochemical sponge 305 is a porous sponge that can provide attachment space for nitrifying bacteria. At this time, an oxygen-rich environment is formed in the second treatment box 300, and biological agents are used for denitrification. Finally, the wastewater after dephosphorization and denitrification is discharged through the outlet pipe 7.

[0028] Example 2: Figure 3 and Figure 6-7 In order to suck the sewage into the second treatment box 300, the suction device 4 includes a connection box 400, which is installed between the first treatment box 200 and the second treatment box 300. A water pump 401 is installed in the connection box 400, and a water suction hose 402 and a water outlet hose 403 are respectively installed on the water pump 401. The water suction hose 402 passes through the first water outlet 205 and is installed in the first treatment box 200. The water outlet hose 403 is installed in the second water inlet 307. A top connection block 406 is installed at one end of the water suction hose 402, and a separation hose 403 is installed on the top connection block 406. A partition plate 405 is provided with a sinking block 404 below the partition plate 405. When the sewage in the first treatment box 200 is settled, the water suction hose 402 is inserted into the first treatment box 200. The water suction hose 402 can be sunk to the bottom of the water through the sinking block 404. The water suction hose 402 will fall on the sludge. At this time, the sewage above the sludge can be sucked into the second treatment box 300 through the water pump 401. During the suction, a filter net is inserted into the partition plate 405. The partition plate 405 can prevent impurities from being sucked by the water suction hose 402. The remaining features are the same as those in Example 1.

[0029] Example 3: Figure 3 and Fig.10 In order to ensure that oxygen, biological agents and sewage are fully mixed during denitrification, the stirring device 5 includes a first motor 500, which is installed on the upper surface of the second treatment box 300. The first motor 500 is equipped with a first rotating shaft 501, and a stirring fan 502 is installed on the first rotating shaft 501. The stirring fan 502 is installed in the second treatment box 300. The first motor 500 drives the first rotating shaft 501 to rotate, and the first rotating shaft 501 drives the stirring fan 502 to rotate. The stirring fan 502 can stir the water inside the second treatment box 300 so as to fully mix the biological agent and oxygen with the sewage, thereby improving the denitrification efficiency. The remaining features are the same as those in Example 1.

[0030] The working principle is as follows: when in use, the water inlet pipe 6 is first connected to the external sewage pipe, and the sewage enters the first treatment box 200 through the water inlet pipe 6. The sewage first passes through the filter basket 202 to intercept large particles of impurities, and the intercepted sewage will fall into the first treatment box 200. The first treatment box 200 and the first box cover 206 are fixed by the lock buckle 211 and the lock tongue 212. After adding the biological agent through the first addition tube 209, the first tube cover 210 is inserted into the first addition tube 209. At this time, the first treatment box 200 The first tank cover 206 forms a relatively closed space, which can form an anoxic environment, and the sewage is dephosphorized by biological agents. The sewage is allowed to stand in the first treatment tank 200 to settle sludge, and the dephosphorized sewage is sucked into the second treatment tank 300 by the suction device 4. After adding biological agents into the second treatment tank 300, the bottom gas stone 304 is inflated by the air pump 301. The bottom gas stone 304 can form rich and dense bubbles, and the gas rises through the biochemical sponge 305 into the water body. The biochemical sponge 305 is a porous sea sponge. The cotton can provide attachment space for nitrifying bacteria. At this time, an oxygen-rich environment is formed in the second treatment box 300, and biological agents are used for denitrification. Finally, the sewage after dephosphorization and denitrification is discharged through the outlet pipe 7. In order to be able to suck the sewage into the second treatment box 300, when the sewage in the first treatment box 200 is precipitated, the suction hose 402 is inserted into the first treatment box 200, and the suction hose 402 can be sunk to the bottom of the water through the sinking block 404. The suction hose 402 will fall on the sludge, and the sewage above the sludge can be sucked out through the outlet pipe 7. The water pump 401 sucks into the second treatment box 300, and during the suction, the filter net is inserted into the partition mesh plate 405. The partition mesh plate 405 can block impurities from being sucked by the water suction hose 402. In order to ensure that oxygen, biological agents and sewage are fully mixed during denitrification, the first motor 500 drives the first rotating shaft 501 to rotate, and the first rotating shaft 501 drives the stirring fan 502 to rotate. The stirring fan 502 can stir the water inside the second treatment box 300, so as to fully mix the biological agents and oxygen with the sewage, thereby improving the denitrification efficiency.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly efficient biological nitrogen and phosphorus removal sewage treatment device, comprising a working plane (1); characterized in that: A biological dephosphorization module (2) is provided on the working plane (1), a biological denitrification module (3) is provided on one side of the biological dephosphorization module (2), a suction device (4) is provided between the biological dephosphorization module (2) and the biological denitrification module (3), a stirring device (5) is provided on the biological denitrification module (3), a water inlet pipe (6) is installed on one side of the working plane (1), and a water outlet pipe (7) is installed on one side of the biological denitrification module (3); The biological dephosphorization module (2) comprises a first treatment box (200), the first treatment box (200) being mounted on a working plane (1), a filter basket (202) being mounted inside the first treatment box (200), a first box cover (206) being mounted above the first treatment box (200), locking tongues (212) being mounted on both sides of the first treatment box (200), and locking buckles (211) being rotatably mounted on both sides of the first box cover (206), the locking buckles (211) being adapted to fit the locking tongues (212).

2. The high-efficiency biological denitrification and phosphorus removal sewage treatment device according to claim 1 is characterized in that: A filter tank (201) is provided in the first processing box (200), the filter basket (202) is installed in the filter tank (201), a fixing ear (203) is installed on the filter basket (202), a fixing bolt (204) is installed on the fixing ear (203), and the filter basket (202) is fixed in the first processing box (200) by means of the fixing bolt (204).

3. A high-efficiency biological denitrification and phosphorus removal sewage treatment device according to claim 2, characterized in that: The first box cover (206) is provided with a first addition port (208), a first addition pipe (209) is installed in the first addition port (208), and a first pipe cover (210) is installed in the first addition pipe (209).

4. The high-efficiency biological denitrification and phosphorus removal sewage treatment device according to claim 3 is characterized by: A first water inlet (207) is formed on one side of the first box cover (206), the water inlet pipe (6) is installed in the first water inlet (207), and a first water outlet (205) is formed on one side of the first treatment box (200).

5. The high-efficiency biological denitrification and phosphorus removal sewage treatment device according to claim 1 is characterized by: The biological denitrification module (3) comprises a second treatment box (300), the second treatment box (300) being installed on a working plane (1), a bottom gas stone (304) being installed in the second treatment box (300), a biochemical sponge (305) being installed above the bottom gas stone (304), an air pump (301) being installed above the second treatment box (300), an air pipe (302) being installed on the air pump (301), and the air pipe (302) being connected to the bottom gas stone (304).

6. The high-efficiency biological denitrification and phosphorus removal sewage treatment device according to claim 5 is characterized by: A second addition port (308) is provided on the top of the second processing box (300), a second addition pipe (309) is installed in the second addition port (308), and a second pipe cover (310) is installed in the second addition pipe (309).

7. The high-efficiency biological denitrification and phosphorus removal sewage treatment device according to claim 6 is characterized by: An air inlet (303) is provided on one side of the second processing box (300), the air pipe (302) is installed in the air inlet (303), a second water inlet (307) is provided on the side of the second processing box (300) away from the air inlet (303), a second water outlet (306) is provided on the side of the second processing box (300) close to the air inlet (303), and the water outlet pipe (7) is installed in the second water outlet (306).

8. The high-efficiency biological denitrification and phosphorus removal sewage treatment device according to claim 7 is characterized by: The suction device (4) comprises a connection box (400), wherein the connection box (400) is installed between the first treatment box (200) and the second treatment box (300), wherein a water pump (401) is installed in the connection box (400), wherein a water suction hose (402) and a water outlet hose (403) are respectively installed on the water pump (401), wherein the water suction hose (402) passes through a first water outlet (205) and is installed in the first treatment box (200), wherein the water outlet hose (403) is installed in a second water inlet (307), wherein a top connection block (406) is installed at one end of the water suction hose (402), wherein a partition mesh plate (405) is installed on the top connection block (406), and a sinking block (404) is installed below the partition mesh plate (405).

9. The high-efficiency biological denitrification and phosphorus removal sewage treatment device according to claim 5 is characterized by: The stirring device (5) comprises a first motor (500), the first motor (500) is mounted on the upper surface of the second processing box (300), a first rotating shaft (501) is mounted on the first motor (500), a stirring fan (502) is mounted on the first rotating shaft (501), and the stirring fan (502) is mounted in the second processing box (300).

10. The high-efficiency biological denitrification and phosphorus removal sewage treatment device according to claim 1 is characterized by: A ball valve (8) is rotatably mounted in the water outlet pipe (7), and a rotating disk (9) is mounted on the ball valve (8).

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