Denitrification and phosphorus removal and phosphorus recovery treatment device and sewage treatment system

Abstract

The utility model provides a kind of denitrification and phosphorus removal and phosphorus recovery treatment device and sewage treatment system, it is related to sewage treatment technical field.The denitrification and phosphorus removal and phosphorus recovery treatment device includes: first water inlet tank, second water inlet tank, simultaneous nitrification and denitrification phosphorus removal reactor and effluent bucket;Wherein: the simultaneous nitrification and denitrification phosphorus removal reactor inside is provided with stirring device, the stirring device is propeller blade, the propeller blade is horizontally arranged in simultaneous nitrification and denitrification phosphorus removal reactor;The right side bottom of the simultaneous nitrification and denitrification phosphorus removal reactor is provided with inclined plate, the distance of the inclined plate and propeller blade is ≥ the width of propeller blade, the inclination angle of the inclined plate is 45~85 °.The application can effectively improve the efficiency of sewage denitrification and phosphorus removal by the above-mentioned denitrification and phosphorus removal and phosphorus recovery treatment device setting, and reduce processing cost.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a denitrification, phosphorus removal and phosphorus recovery treatment device and wastewater treatment system. Background Technology

[0002] Currently, wastewater treatment plants in my country employ activated sludge processes, such as A2 / O, oxidation ditch, and SBR. In traditional activated sludge processes, the main microorganisms responsible for nitrogen and phosphorus removal coexist within the same system to achieve these functions. However, due to differences in substrate type and environmental conditions required by these microorganisms during process operation, problems such as carbon source competition and conflicting sludge ages inevitably arise within the same wastewater treatment system, thus affecting the system's nitrogen and phosphorus removal performance.

[0003] To ensure the denitrification performance of wastewater treatment processes, phosphorus removal is mainly carried out using chemical phosphorus removal, which often requires the addition of large amounts of chemical phosphorus removal agents (polyaluminum or polyferric). The chemical sludge generated during the phosphorus removal process can easily cause secondary pollution to the environment.

[0004] The existing simultaneous nitrification-denitrification phosphorus removal process combines EBPR and SND processes to achieve simultaneous removal of carbon, nitrogen, and phosphorus in a single reactor. Compared with traditional nitrification-denitrification technology, simultaneous nitrification-denitrification technology achieves nitrification and denitrification in the same space, so there is no need to set up separate aerobic and anoxic zones, which can effectively save 30%-40% of the space volume, reduce the footprint, and reduce the construction cost of the structure.

[0005] Based on the advantages of HAP-coupled biological nitrogen and phosphorus removal, phosphorus can be released through microbial anaerobic processes, and calcium salt agents can be added to the water body to remove phosphorus from wastewater in the form of crystalline phosphate. The reaction process produces a small amount of sludge, and the crystallized products can be recovered and utilized, achieving stable nitrogen and phosphorus removal and resource utilization of wastewater. However, the main problem with existing HAP crystallization phosphorus removal methods is that they are only used for recovering high-concentration phosphorus wastewater, and have not yet been studied for wastewater with low phosphorus concentrations.

[0006] In view of the above, this utility model is hereby proposed. Utility Model Content

[0007] The primary objective of this invention is to provide a nitrogen and phosphorus removal and phosphorus recovery treatment device. This device, while achieving biological nitrogen and phosphorus removal and phosphorus recovery from wastewater, can significantly reduce the consumption of carbon sources and phosphorus removal agents, and also has high-efficiency treatment capabilities, effectively reducing operating costs.

[0008] The second objective of this invention is to provide a wastewater treatment system.

[0009] In order to achieve the above-mentioned objectives of this utility model, the following technical solution is adopted: This utility model provides a nitrogen and phosphorus removal and phosphorus recovery treatment device, which includes: a first inlet tank, a second inlet tank, a simultaneous nitrification and denitrification phosphorus removal reactor, and an outlet tank; Wherein: the first inlet tank, the second inlet tank and the outlet tank are respectively connected to the pipeline of the synchronous nitrification-denitrification phosphorus removal reactor; The simultaneous nitrification-denitrification phosphorus removal reactor is equipped with a stirring device, which is a propeller blade, and the propeller blade is horizontally arranged inside the simultaneous nitrification-denitrification phosphorus removal reactor. An inclined plate is provided at the bottom right side of the simultaneous nitrification-denitrification phosphorus removal reactor. The distance between the inclined plate and the propeller blade is greater than or equal to the width of the propeller blade, and the inclination angle of the inclined plate is 45° to 85°.

[0010] Furthermore, the tilt angle of the inclined plate is 65°.

[0011] Furthermore, a first inlet pump is installed between the first inlet tank and the simultaneous nitrification-denitrification phosphorus removal reactor; Furthermore, a second inlet pump is installed between the second inlet tank and the simultaneous nitrification-denitrification phosphorus removal reactor.

[0012] Furthermore, a drain valve is installed between the simultaneous nitrification-denitrification phosphorus removal reactor and the effluent tank.

[0013] Furthermore, the simultaneous nitrification-denitrification phosphorus removal reactor is equipped with an aeration device; The aeration device includes an aeration head installed at the bottom of the simultaneous nitrification-denitrification phosphorus removal reactor and an air pump connected to the aeration head pipeline.

[0014] Furthermore, a gas flow meter is installed on the pipe connecting the aeration head and the air pump.

[0015] Furthermore, the simultaneous nitrification-denitrification phosphorus removal reactor is equipped with online pH monitoring equipment, online DO monitoring equipment, and a thermometer.

[0016] Furthermore, the simultaneous nitrification-denitrification phosphorus removal reactor is also equipped with an overflow port and a sampling port.

[0017] The present invention provides a wastewater treatment system, which includes the above-mentioned denitrification, phosphorus removal and phosphorus recovery treatment device.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a nitrogen and phosphorus removal and phosphorus recovery treatment device, which includes: a first inlet tank, a second inlet tank, a simultaneous nitrification-denitrification phosphorus removal (SNDPR) reactor, and an outlet tank. The first inlet tank is used for adding wastewater, ammonium salts, phosphates, and organic matter; the second inlet tank is used for adding calcium ion concentrate. This application adjusts the pH of the wastewater to create conditions for HAP formation. Simultaneously, the addition of calcium ion concentrate from the second inlet tank forms hydroxyapatite (HAP) precipitate, which not only recovers phosphorus resources but also significantly reduces the consumption of carbon sources and phosphorus removal agents compared to existing technologies, while possessing high treatment capacity and effectively reducing operating costs. Furthermore, the treatment device of this application has an inclined plate with an angle of 45-85° at the bottom right side of the simultaneous nitrification-denitrification phosphorus removal reactor, which can effectively increase the settling area, shorten the settling time, and improve the settling efficiency.

[0019] The wastewater treatment system provided by this utility model includes the above-mentioned denitrification, phosphorus removal and phosphorus recovery treatment device. Due to the performance of the above-mentioned denitrification, phosphorus removal and phosphorus recovery treatment device, the wastewater treatment system of this utility model has the technical advantages of high treatment efficiency, low operating cost and environmental friendliness. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the denitrification, phosphorus removal and phosphorus recovery treatment device provided in Embodiment 1 of this utility model.

[0022] Icons: 11-First inlet pump; 1-First inlet tank; 21-Second inlet pump; 2-Second inlet tank; 31-Propeller blade; 32-Inclined plate; 33-Aeration head; 341-Gas flow meter; 34-Air pump; 35-Ph online monitoring device; 36-DO online monitoring device; 37-Thermometer; 38-Overflow port; 39-Sampling port; 3-Simultaneous nitrification-denitrification phosphorus removal reactor; 41-Drain valve; 4-Outlet tank. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. To help to better understand this utility model, specific embodiments will now be described in detail.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] According to one aspect of the present invention, a nitrogen and phosphorus removal and phosphorus recovery treatment device is provided, the nitrogen and phosphorus removal and phosphorus recovery treatment device comprising: a first inlet tank 1, a second inlet tank 2, a simultaneous nitrification-denitrification phosphorus removal reactor 3, and an outlet tank 4. The first inlet tank 1, the second inlet tank 2, and the outlet tank 4 are respectively connected to the pipeline of the synchronous nitrification-denitrification phosphorus removal reactor 3; The synchronous nitrification-denitrification phosphorus removal reactor 3 is equipped with a stirring device, which is a propeller blade 31, and the propeller blade 31 is horizontally arranged inside the synchronous nitrification-denitrification phosphorus removal reactor 3. An inclined plate 32 is provided at the bottom right side of the simultaneous nitrification-denitrification phosphorus removal reactor 3. The distance between the inclined plate 32 and the propeller blade 31 is greater than or equal to the width of the propeller blade 31. The inclination angle of the inclined plate 32 is 45~85°.

[0028] This utility model provides a denitrification, phosphorus removal, and phosphorus recovery treatment device, which includes: a first inlet tank 1, a second inlet tank 2, a simultaneous nitrification-denitrification phosphorus removal reactor 3, and an outlet tank 4. The first inlet tank 1 is used for adding wastewater, ammonium salts, phosphates, and organic matter; the second inlet tank 2 is used for adding calcium ion concentrate. This application adjusts the pH of the wastewater to create conditions for HAP formation. Simultaneously, the addition of calcium ion concentrate to the second inlet tank 2 forms hydroxyapatite (HAP) precipitate, which not only recovers phosphorus resources but also significantly reduces the consumption of carbon sources and phosphorus removal agents compared to existing technologies, while possessing high treatment capacity and effectively reducing operating costs. Furthermore, the treatment device of this application has an inclined plate 32 with an angle of 45-85° at the bottom right side of the simultaneous nitrification-denitrification phosphorus removal reactor 3, which can effectively increase the settling area, shorten the settling time, and improve the settling efficiency.

[0029] In a preferred embodiment of this utility model, the tilt angle of the tilting plate 32 is 65°.

[0030] As a preferred embodiment, the tilt angle of the tilting plate 32 in this application is set to 65°, which can effectively improve the settling efficiency and shorten the settling time.

[0031] In a preferred embodiment of this utility model, a first water inlet pump 11 is provided between the first water inlet tank 1 and the synchronous nitrification-denitrification phosphorus removal reactor 3; In a preferred embodiment of the present invention, a second inlet pump 21 is provided between the second inlet tank 2 and the synchronous nitrification-denitrification phosphorus removal reactor 3.

[0032] In a preferred embodiment of this utility model, a drain valve 41 is provided between the simultaneous nitrification-denitrification phosphorus removal reactor 3 and the effluent tank 4.

[0033] In a preferred embodiment of this utility model, the simultaneous nitrification-denitrification phosphorus removal reactor 3 is equipped with an aeration device. The aeration device includes an aeration head 33 located at the bottom of the synchronous nitrification-denitrification phosphorus removal reactor 3 and an air pump 34 connected to the aeration head 33 via a pipe.

[0034] In a preferred embodiment of this utility model, a gas flow meter 341 is provided on the pipe connecting the aeration head 33 and the air pump 34.

[0035] In a preferred embodiment of this utility model, the simultaneous nitrification-denitrification phosphorus removal reactor 3 is equipped with an online pH monitoring device 35, an online DO monitoring device 36, and a thermometer 37.

[0036] In a preferred embodiment of this utility model, the simultaneous nitrification-denitrification phosphorus removal reactor 3 is further provided with an overflow port 38 and a sampling port 39.

[0037] According to one aspect of the present invention, a wastewater treatment system includes the aforementioned denitrification, phosphorus removal and phosphorus recovery device.

[0038] The wastewater treatment system provided by this utility model includes the above-mentioned denitrification, phosphorus removal and phosphorus recovery treatment device. Due to the performance of the above-mentioned denitrification, phosphorus removal and phosphorus recovery treatment device, the wastewater treatment system of this utility model has the technical advantages of high treatment efficiency, low operating cost and environmental friendliness.

[0039] Example 1 Figure 1 This is a schematic diagram of the denitrification, phosphorus removal and phosphorus recovery treatment device provided in Embodiment 1 of this utility model.

[0040] As shown in the figure, this embodiment provides a nitrogen and phosphorus removal and phosphorus recovery treatment device, which includes: a first inlet tank 1, a second inlet tank 2, a simultaneous nitrification-denitrification phosphorus removal reactor 3, and an outlet tank 4; The first inlet tank 1, the second inlet tank 2, and the outlet tank 4 are respectively connected to the pipeline of the synchronous nitrification-denitrification phosphorus removal reactor 3; The simultaneous nitrification-denitrification phosphorus removal reactor 3 is equipped with a stirring device, which is a propeller blade 31. The propeller blade 31 is horizontally arranged inside the simultaneous nitrification-denitrification phosphorus removal reactor 3. At the same time, an inclined plate 32 is arranged at the bottom right side of the simultaneous nitrification-denitrification phosphorus removal reactor 3. The distance between the inclined plate 32 and the propeller blade 31 is greater than or equal to the width of the propeller blade 31, and the inclination angle of the inclined plate 32 is 65°.

[0041] The denitrification, phosphorus removal, and phosphorus recovery treatment device provided in this embodiment includes: a first inlet tank 1 for adding wastewater, ammonium salts, phosphates, and organic matter; and a second inlet tank 2 for adding calcium ion concentrate. This application adjusts the pH of the wastewater to create conditions for HAP formation. Simultaneously, the addition of calcium ion concentrate to the second inlet tank 2 forms hydroxyapatite (HAP) precipitate, which not only recovers phosphorus resources but also significantly reduces the consumption of carbon sources and phosphorus removal agents compared to existing technologies. It also possesses high-efficiency treatment capabilities, effectively reducing operating costs. Furthermore, the treatment device of this application has a 65° inclined plate 32 at the bottom right side of the simultaneous nitrification-denitrification phosphorus removal reactor 3, which effectively increases the settling area, shortens the settling time, and improves the settling efficiency.

[0042] In the optional technical solution of this embodiment, the tilt angle of the tilting plate 32 is set to 65°. Compared with the tilt angles of 45°, 85°, etc., the tilt angle of the tilting plate 32 in this embodiment can more effectively improve the settlement efficiency and shorten the settlement time.

[0043] In the optional technical solution of this embodiment, a first inlet pump 11 is provided between the first inlet tank 1 and the synchronous nitrification-denitrification phosphorus removal reactor 3, which is used to adjust the amount of sewage, ammonium salt, phosphate and organic matter added to the first inlet tank 1; In the optional technical solution of this embodiment, a second water inlet pump 21 is provided between the second water inlet tank 2 and the synchronous nitrification-denitrification phosphorus removal reactor 3 to adjust the amount of calcium ion concentrate added to the second water inlet tank 2.

[0044] In the optional technical solution of this embodiment, a drain valve 41 is provided between the simultaneous nitrification-denitrification phosphorus removal reactor 3 and the effluent tank 4.

[0045] In the optional technical solution of this embodiment, the simultaneous nitrification-denitrification phosphorus removal reactor 3 is equipped with an aeration device; The aeration device includes an aeration head 33 located at the bottom of the synchronous nitrification-denitrification phosphorus removal reactor 3 and an air pump 34 connected to the aeration head 33 via a pipe.

[0046] In an optional technical solution of this embodiment, a gas flow meter 341 is installed on the pipe connecting the aeration head 33 and the air pump 34.

[0047] In the optional technical solution of this embodiment, the simultaneous nitrification-denitrification phosphorus removal reactor 3 is equipped with an online pH detection device 35, an online DO detection device 36, and a thermometer 37 for real-time monitoring of the pH, DO, and temperature values ​​of the simultaneous nitrification-denitrification phosphorus removal reactor 3.

[0048] In the optional technical solution of this embodiment, the simultaneous nitrification-denitrification phosphorus removal reactor 3 is also provided with an overflow port 38 and a sampling port 39.

[0049] The wastewater treatment steps of the nitrogen and phosphorus removal and phosphorus recovery treatment device in this embodiment are as follows: (a) Startup phase of the SNDPR system: Wastewater treatment plant sludge is inoculated into the simultaneous nitrification-denitrification phosphorus removal reactor 3, with a sludge concentration of 2500~3000 mg / L. Approximately 20~30 mg / L of NH4 is added to the reactor through the first influent tank 1. + -N, COD around 350~400 mg / L, PO4 around 10~20 mg / L 3— P's water body; Anaerobic stirring for 100-120 min; aerobic stirring for 120-180 min. During the aerobic stage, dissolved oxygen was controlled at 4-6 mg / L by adjusting gas flow meter 341. Settling time is 30-60 minutes, followed by drainage through drain valve 41 for 5-10 minutes, with a drainage ratio of 50%-60%. The NO2 generated in the SNDPR system is calculated based on the N balance. － -N and NO3 － -N less than NH4 + -N removal rate indicates the presence of SND (sulfurized nitrogen) in the reactor during the aerobic stage. When the SND rate in the SBR reactor reaches 50% or more, the effluent PO4... 3- The SNDPR system is considered to have started successfully when the average concentration of -P is below 2 mg / L and the removal rate is above 80%.

[0050] (II) Operation and Optimization Phase of the SNDPR System: Manually remove 100ml of sludge daily, controlling the sludge concentration at 3000~4000mg / L and maintaining the sludge age at 110~140 days. Add 10~15mg / L of NH4 to the simultaneous nitrification-denitrification phosphorus removal reactor 3 through the first influent tank 1. + -N, COD 350-400 mg / L, PO4 10-15 mg / L 3— P, when the effluent COD is less than 50 mg / L, the effluent PO4 3— If the phosphorus concentration is less than 1 mg / L and the SND rate is greater than 80%, and this condition is maintained for 20 days, the SNDPR system is considered to have high efficiency and stability in nitrogen and phosphorus removal.

[0051] (III) Start-up phase of HAP coupled SNDPR nitrogen and phosphorus removal system: Add a 10 mg / L hydrochloric acid solution to the first inlet tank 1 to adjust the pH value of the solution in the inlet tank to about 8.7. Then add 10-15 mg / L NH4+ to the simultaneous nitrification-denitrification phosphorus removal reactor 3. + -N, COD 350~400 mg / L, PO4 10~15 mg / L 3— After adjusting the influent pH, both anaerobic phosphorus release and aerobic phosphorus uptake in the reactor were affected to some extent. Once the ammonia nitrogen and nitrate nitrogen in the effluent of the SNDPR reactor were maintained at <1 mg / L, and the anaerobic phosphorus release and phosphorus removal rates recovered to over 90%, 10-15 mg / L of NH4+ was added to the simultaneous nitrification-denitrification phosphorus removal reactor 3. + -N, COD 350-400 mg / L, PO4 10-15 mg / L 3— P, anaerobic stirring for 60 minutes, then Ca is added through the second inlet tank 2. 2+ For the concentrate, the Ca / P ratio in the SNDPR reactor is 9-12. Anaerobic stirring is carried out for 60 min, and the dissolved oxygen is controlled below 0.5 mg / L throughout the anaerobic stage. Aerobic stirring is carried out for 180 min, and the dissolved oxygen is controlled at 4-6 mg / L by adjusting the gas flow meter 341 during the aerobic stage. Sedimentation is carried out for 30-60 min, and the water is drained through the drain valve 41 for 5-10 min. In this embodiment, an inclined plate is installed at the bottom right side of the simultaneous nitrification-denitrification phosphorus removal reactor 3 to increase the settling area, reduce the mutual interference between calcium phosphate crystals during the settling process, shorten the settling time, and improve the settling efficiency.

[0052] When the phosphorus release during the anaerobic stage reaches 40 mg / L or more, HAP crystallization leads to PO4 at the end of the anaerobic phase. 3— When the phosphorus concentration decreases by about 20-30 mg / L, the phosphorus concentration in the effluent during the aerobic stage is below 2 mg / L, and the SND rate reaches more than 80%, the HAP coupled SNDPR denitrification and phosphorus removal system is considered to have started successfully.

[0053] (iv) Stable operation phase of the HAP-coupled SNDPR nitrogen and phosphorus removal system: When the anaerobic phosphorus release rate of the system reaches 40 mg / L or more, the PO4 at the end of the anaerobic period... 3— When the phosphorus concentration is maintained at 25-35 mg / L, the SND rate in the aerobic section reaches over 80%, and the phosphorus removal rate in the effluent reaches over 90%, and this condition is maintained for 15-20 days, the HAP-coupled SNDPR denitrification, phosphorus removal, and phosphorus recovery system is considered to have reached a stable state.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A denitrification, phosphorus removal, and phosphorus recovery device, characterized in that, The denitrification, phosphorus removal and phosphorus recovery treatment device includes: a first inlet tank (1), a second inlet tank (2), a simultaneous nitrification-denitrification phosphorus removal reactor (3), and an outlet tank (4). Wherein: the first inlet tank (1), the second inlet tank (2) and the outlet tank (4) are respectively connected to the pipeline of the synchronous nitrification-denitrification phosphorus removal reactor (3); The synchronous nitrification-denitrification phosphorus removal reactor (3) is equipped with a stirring device, which is a propeller blade (31) and is horizontally arranged inside the synchronous nitrification-denitrification phosphorus removal reactor (3). An inclined plate (32) is provided at the bottom right side of the synchronous nitrification-denitrification phosphorus removal reactor (3). The distance between the inclined plate (32) and the propeller blade (31) is greater than or equal to the width of the propeller blade (31). The inclined angle of the inclined plate (32) is 45~85°.

2. The denitrification, phosphorus removal, and phosphorus recovery treatment device according to claim 1, characterized in that, The tilt angle of the inclined plate (32) is 65°.

3. The denitrification, phosphorus removal, and phosphorus recovery treatment device according to claim 1, characterized in that, A first inlet pump (11) is installed between the first inlet tank (1) and the synchronous nitrification-denitrification phosphorus removal reactor (3).

4. The denitrification, phosphorus removal, and phosphorus recovery treatment device according to claim 1, characterized in that, A second inlet pump (21) is installed between the second inlet tank (2) and the synchronous nitrification-denitrification phosphorus removal reactor (3).

5. The denitrification, phosphorus removal, and phosphorus recovery treatment device according to claim 1, characterized in that, A drain valve (41) is provided between the synchronous nitrification-denitrification phosphorus removal reactor (3) and the effluent tank (4).

6. The denitrification, phosphorus removal, and phosphorus recovery treatment device according to claim 1, characterized in that, The simultaneous nitrification-denitrification phosphorus removal reactor (3) is equipped with an aeration device; The aeration device includes an aeration head (33) installed at the bottom of the synchronous nitrification-denitrification phosphorus removal reactor (3) and an air pump (34) connected to the aeration head (33) via a pipe.

7. The denitrification, phosphorus removal, and phosphorus recovery treatment device according to claim 6, characterized in that, A gas flow meter (341) is installed on the pipe connecting the aeration head (33) and the air pump (34).

8. The denitrification, phosphorus removal, and phosphorus recovery treatment device according to claim 1, characterized in that, The simultaneous nitrification-denitrification phosphorus removal reactor (3) is equipped with an online Ph detection device (35), an online DO detection device (36), and a thermometer (37).

9. The denitrification, phosphorus removal, and phosphorus recovery treatment device according to claim 1, characterized in that, The simultaneous nitrification-denitrification phosphorus removal reactor (3) is also equipped with an overflow port (38) and a sampling port (39).

10. A wastewater treatment system, characterized in that, The wastewater treatment system includes the denitrification, phosphorus removal and phosphorus recovery treatment device as described in any one of claims 1 to 9.

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