Precise aeration control system and method for powder carrier biological fluidized bed process

Abstract

The invention provides a precise aeration control system for a powder carrier biological fluidized bed process. The precise aeration control system comprises a water inlet pipe, an anaerobic zone, an anoxic zone, an aeration system, an aerobic zone, a secondary sedimentation tank, a water outlet pipe, an air blower, a sludge sampler, a sludge sedimentation ratio detection device and a powder carrier, the water inlet end of the water inlet pipe is provided with a plurality of sensors communicated to the anaerobic zone; the water outlet end of the anaerobic zone is communicated with the input end of the aerobic zone; the output end of the aerobic zone is communicated with the secondary sedimentation tank; the water outlet pipe is mounted at the water outlet end of the secondary sedimentation tank; the aeration system is communicated with the air blower and is used for aerating the aerobic zone; the powder carrier is put into the biochemical pool, sampling is carried out through the sludge sampler installed in the aerobic zone, and the sludge settling ratio detection device is used for measuring the sludge settling ratio after the powder carrier settles for a period of time. Meanwhile, the invention further provides a method of the system, and compared with a conventional method, the problem that the dissolved oxygen of the biochemical pool is large in fluctuation under manual regulation and control can be solved, and stable operation of the sewage treatment biochemical system is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of dissolved oxygen supply equipment and methods, and in particular relates to a precise aeration control system and method for a powder carrier biological fluidized bed process. Background Art

[0002] Dissolved oxygen concentration is one of the key indicators for the operation of activated sludge biological sewage treatment systems. Too high dissolved oxygen concentration will lead to high energy consumption and poor total nitrogen removal effect; while low dissolved oxygen concentration may lead to poor removal of organic matter and ammonia nitrogen, and may also cause the proliferation of filamentous bacteria and sludge bulking. On the other hand, dissolved oxygen is one of the important survival factors of microorganisms. Changes in dissolved oxygen will lead to changes in the structure of activated sludge microbial communities, thereby affecting the removal efficiency of pollutants and even affecting the stable operation of the system. Therefore, reasonable regulation of dissolved oxygen concentration in activated sludge biochemical systems is an important means to ensure efficient, low-consumption and stable operation of activated sludge systems.

[0003] Powder carrier technology is a new technology developed on the basis of traditional activated sludge method. It constructs an attached and suspended microbial system by adding composite powder carrier materials into the biochemical unit of the activated sludge system, and achieves double sludge age to solve the contradiction between the sludge age of nitrifying bacteria and polyphosphate bacteria, thereby enhancing the effect of microbial denitrification and phosphorus removal. This technology has been widely used in the upgrading and transformation of sewage treatment plants in cities or industrial parks. Due to the large specific gravity of the added powder carrier, conventional aeration methods are prone to the problem of the carrier sinking to the bottom and not being fully mixed in the biochemical system. In addition, the traditional aeration control of biochemical pools is manually controlled, and there are often problems such as large fluctuations in dissolved oxygen in the biochemical pool and excessive opening of the vent valve, resulting in high aeration energy consumption and unstable biochemical system. Summary of the invention

[0004] Technical solution: In order to solve the above technical problems, the present invention can accurately control the stability of dissolved oxygen in the biochemical system while ensuring that the powder carrier is evenly distributed in the system, and fully contact with sewage to exert its effectiveness. Specifically, a powder carrier biological fluidized bed process precision aeration control system is provided, including an inlet pipe, an anaerobic zone, an anoxic zone, an aeration system, an aerobic zone, a secondary sedimentation tank, an outlet pipe, a blower, a sludge sampler, a sludge settling ratio detection device, and a powder carrier;

[0005] The water inlet end of the water inlet pipe is equipped with multiple sensors connected to the anaerobic zone; the water outlet end of the anaerobic zone is connected to the input end of the aerobic zone; the output end of the aerobic zone is connected to the secondary sedimentation tank; the water outlet pipe is installed at the outlet end of the secondary sedimentation tank;

[0006] A plurality of sensors for measuring effluent are installed at the effluent pipe end of the secondary sedimentation tank;

[0007] The aeration system is connected to the blower and is used to aerate the aerobic zone;

[0008] The powder carrier is placed in a biochemical pool, which includes an anaerobic zone, an anoxic zone, and an aerobic zone. Sampling is performed by a sludge sampler installed in the aerobic zone of the biochemical pool, and a sludge settling ratio detection device is used to measure the sludge settling ratio after the powder carrier has settled for a period of time.

[0009] As an improvement, the aeration system includes an aeration main pipe, a microporous aeration delivery pipe, a perforated aeration delivery pipe, a microporous aeration head, and a perforated aeration pipe; wherein one end of the aeration main pipe is connected to the blower; and the other end is divided into an independent microporous aeration delivery pipe and a perforated aeration delivery pipe; the microporous aeration delivery pipe and the perforated aeration delivery pipe are independently connected to a first aeration valve, a second aeration valve, and are connected to the microporous aeration head and the perforated aeration pipe at the bottom of the aerobic tank.

[0010] As an improvement, it also includes a vent pipe and a vent valve; wherein there are two blowers, the frequencies of the two blowers are different, and the aeration main pipe is directly connected to the vent pipe and the vent valve.

[0011] As an improvement, it further comprises a temperature detection structure, which is directly connected to the blower and is used to detect the internal temperature of the blower.

[0012] As an improvement, the sensors at the water inlet end of the water inlet pipe include an inlet flow monitoring sensor, an inlet COD concentration monitoring sensor, and an inlet ammonia nitrogen concentration monitoring sensor; the sensors at the outlet pipe end of the secondary sedimentation tank include an outlet COD concentration monitoring sensor and an outlet ammonia nitrogen concentration monitoring sensor.

[0013] As an improvement, it also includes a biochemical pool PLC cabinet, which is used to receive the collected data sets of all sensors for transmission. All sensors in the system are electrically connected to the biochemical pool PLC cabinet.

[0014] As an improvement, it also includes a blower PLC cabinet for receiving valve and fan data and transmitting, and the blower PLC cabinet is electrically connected to the control valve of the aeration system and the fan control valve of the blower.

[0015] At the same time, the present invention also provides a method for precise aeration control of a powder carrier biological fluidized bed process, which is the specific steps of the precise aeration control system of the powder carrier biological fluidized bed process described above:

[0016] (1) Setting measurement sensors at the inlet of the biochemical pool, the aerobic pool, and the second sedimentation outlet to collect data one;

[0017] (2) collecting data 2 of the aeration valve opening of the aeration system and data 3 of the fan frequency of the blower;

[0018] (3) adding a powder carrier to the biochemical pool, and determining the sludge settling ratio of the powder carrier at different depths in the biochemical pool at the target time value as data 4;

[0019] (4) Using data 1 to 4 collected within a period of time as a training set, establishing a deep learning model to process the data, and establishing a long short-term memory model database of data 2 and data 3 corresponding to data 1 and data 4 under the model; until the model prediction value is consistent with the actual change value, stop training;

[0020] (5) Select at least one data as the target parameter, update and optimize the model, and obtain the relationship between the target value and data 2 and data 3;

[0021] (6) When the measured value exceeds the set threshold of the target parameter in (5), an alarm command will be issued to prompt human attention through the display; or the dissolved oxygen change, the blower and the real-time operating parameters of the aeration pipeline valve will be displayed on the display; and the aeration system start and stop function can be set on the display to stop aeration or start or shut down with one button.

[0022] As an improvement, the data 1 includes the influent COD and ammonia nitrogen water quality data of the biochemical pool, the influent water volume data, the sludge concentration and dissolved oxygen data of the biochemical pool, and the effluent COD and ammonia nitrogen water quality data.

[0023] As an improvement, in step (5), the target parameter is the dissolved oxygen concentration, and the threshold is set to 20% of the target dissolved oxygen concentration.

[0024] Beneficial effects: Compared with conventional methods, the powder carrier biological fluidized bed process precision aeration control system and method proposed in the present invention can solve the problem of large fluctuations in dissolved oxygen in the biochemical pool under artificial regulation, and ensure the stable operation of the sewage treatment biochemical system. It can also reduce the aeration energy consumption of the biochemical system, save energy and reduce carbon emissions, and at the same time, ensure the uniform distribution of powder carriers inside the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 Comparison between the predicted value of dissolved oxygen and the actual value by the model of the present invention.

[0027] Figure 3 This is a schematic diagram of artificially controlling dissolved oxygen fluctuations of the present invention.

[0028] Figure 4 Schematic diagram of the precise aeration system of the present invention for regulating dissolved oxygen fluctuations.

[0029] In the figure: 1-water inlet pipe; 2-water inlet flow rate monitoring sensor; 3-water inlet COD concentration monitoring sensor; 4-water inlet ammonia nitrogen concentration monitoring sensor; 5-anaerobic zone; 6-anoxic zone; 7-sludge settling ratio detection device; 8-sludge sampler; 9-aeration main pipe; 10-first aeration valve; 11-microporous aeration delivery pipe; 12-second aeration valve; 13-perforated aeration delivery pipe; 14-microporous aeration head; 15-perforated aeration pipe; 16-secondary sedimentation tank; 17-outlet COD concentration monitoring sensor; 18-outlet ammonia nitrogen concentration monitoring sensor; 19-dissolved oxygen monitoring sensor; 20-outlet pipe of the secondary sedimentation tank; 21-vent pipe; 22-vent valve; 23-blower; 24-biochemical pool PLC cabinet; 25-blower PLC cabinet; 26-first data acquisition module; 27-control module; 28-display; 29-aerobic zone; 30-sludge concentration detection sensor. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below so that those skilled in the art can better understand the advantages and features of the present invention, thereby making a clearer definition of the protection scope of the present invention. The embodiments described in the present invention are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0031] See Figure 1 As shown, a precise aeration control system for a powder carrier biological fluidized bed process includes an inlet pipe 1, an anaerobic zone 5, an anoxic zone 6, an aeration system, an aerobic zone 29, a secondary sedimentation tank 16, an outlet pipe 20, a blower 23, a sludge sampler 8, a sludge settling ratio detection device 7, and a powder carrier;

[0032] The water inlet end of the water inlet pipe 1 is installed with multiple sensors connected to the anaerobic zone 5; the water outlet end of the anaerobic zone 5 is connected to the input end of the aerobic zone 29; the output end of the aerobic zone 29 is connected to the secondary sedimentation tank 16; the water outlet pipe 20 is installed at the outlet end of the secondary sedimentation tank 16;

[0033] A plurality of sensors for measuring effluent are installed at the end of the effluent pipe 20 of the secondary sedimentation tank 16;

[0034] The aeration system is connected to the blower 23 and is used to aerate the aerobic zone 29;

[0035] The powder carrier is put into the biochemical pool, and sampling is performed by a sludge sampler 8 installed in the aerobic zone 29 of the biochemical pool. The sludge settling ratio detection device 7 is used to measure the sludge settling ratio after the powder carrier has settled for a period of time.

[0036] Further, see Figure 1In the embodiment, the aeration system includes an aeration main pipe 9, a microporous aeration delivery pipe 11, a perforated aeration delivery pipe 13, a microporous aeration head 14, and a perforated aeration pipe 15; wherein one end of the aeration main pipe 9 is connected to the blower 23; and the other end is divided into independent microporous aeration delivery pipes 11 and perforated aeration delivery pipes 13; the microporous aeration delivery pipes 11 and perforated aeration delivery pipes 13 are independently connected to the first aeration valve 10 and the second aeration valve 12 and are connected to the microporous aeration head 14 and the perforated aeration pipe 15 at the bottom of the aerobic tank 29.

[0037] Preferably, it also includes a control pipe 21 and a vent valve 22; wherein the blowers 23 include two, the two blowers 23 have different frequencies, and the aeration main pipe 9 is directly connected to the vent pipe 21 and the vent valve.

[0038] In the present invention, two blowers with different powers are provided, and the operation of the blowers can be switched according to the air volume. In consideration of energy saving, a low-power blower is preferably used. A vent pipe and a vent valve are provided on the aeration pipeline. When the air volume is still too much after switching to a low-power blower, the vent valve is controlled to open to discharge the excess air volume of the blower.

[0039] Long-term high-frequency operation of the blower will cause its internal temperature to be too high and automatically shut down. The present invention also includes a temperature detection structure, which is directly connected to the blower and is used to detect the internal temperature of the blower. Through this temperature detection function, in order to ensure the stable operation of the blower, when the internal temperature of the blower is synchronously collected, when the air volume demand is large and the blower needs to run at a high frequency for a long time, and at this time the internal temperature of the blower is close to the upper limit of 80 degrees Celsius, the control module can reduce the frequency of the blower and turn on another blower to prevent the temperature of the blower from rising further.

[0040] Furthermore, the sensors at the water inlet end of the water inlet pipe 1 include a water inlet flow rate monitoring sensor 2, a water inlet COD concentration monitoring sensor 3, and a water inlet ammonia nitrogen concentration monitoring sensor; the sensors at the water outlet pipe 20 end of the secondary sedimentation tank 16 include a water outlet COD concentration monitoring sensor 17 and a water outlet ammonia nitrogen concentration monitoring sensor 18.

[0041] It also includes a biochemical pool PLC cabinet 24, which is used to receive and transmit the collected data sets of all sensors. All sensors in the system are electrically connected to the biochemical pool PLC cabinet 24. It also includes a blower PLC cabinet 25, which is used to receive and transmit valve and fan data. The blower PLC cabinet 25 is electrically connected to the control valve of the aeration system and the fan control valve of the blower.

[0042] As a specific embodiment of the present invention, the present invention provides a control method for the above system, and the specific steps are:

[0043] (1) Setting measurement sensors at the inlet of the biochemical pool, the aerobic pool, and the second sedimentation outlet to collect data one;

[0044] (2) collecting data 2 of the aeration valve opening of the aeration system and data 3 of the fan frequency of the blower;

[0045] (3) adding a powder carrier to the biochemical pool, and determining the sludge settling ratio of the powder carrier at different depths in the biochemical pool at the target time value as data 4;

[0046] (4) Using data 1 to 4 collected within a period of time as a training set, establishing a deep learning model to process the data, and establishing a long short-term memory model database of data 2 and data 4 corresponding to data 1 and data 4 under the model; until the model prediction value is consistent with the actual change value, stop training;

[0047] (5) Select at least one data as the target parameter, update and optimize the model, and obtain the relationship between the target value and data 2 and data 3;

[0048] (6) When the measured value exceeds the set threshold of the target parameter in (5), an alarm command will be issued to prompt human attention through the display; or the dissolved oxygen change, the real-time operating parameters of the blower and the aeration pipeline valve will be displayed on the display; and by setting the aeration system start and stop function on the display, aeration can be stopped or started or shut down with one button, ensuring that human intervention can be carried out at any time.

[0049] Preferably, data 1 includes water flow rate, COD, and ammonia nitrogen sensors at the inlet of the biochemical pool, sludge concentration, sludge settling ratio, and dissolved oxygen sensors in the aerobic zone of the biochemical pool, and ammonia nitrogen and COD sensors at the outlet of the secondary sedimentation tank. At the same time, a biochemical pool PLC cabinet is set to connect the above sensors to receive and transmit data.

[0050] In step (3), the powder carrier biological fluidized bed technology of the present invention requires adding powder carriers to the biochemical pool. Since the sludge has a larger specific gravity after adding the powder carriers, it is easy to settle at the bottom of the biochemical pool. In order to detect whether the powder carriers are evenly mixed in the biochemical system, an automatic reading device for the activated sludge settling ratio is set to detect the sludge settling ratio at different depths in the aerobic zone of the biochemical pool at regular intervals, for example, 40 minutes, as data 1, and connect it to the biochemical pool PLC cabinet.

[0051] In step (4), the control system of the present invention also includes a first data acquisition module 26 and a control module 27; wherein the first data acquisition module 26 is connected to the biochemical pool PLC cabinet 24 and the blower PLC cabinet 25 to exchange information, by collecting data one to data four, including the influent COD and ammonia nitrogen water quality data of the biochemical pool, the influent water volume data, the biochemical pool sludge concentration, sludge settling ratio, dissolved oxygen data, the effluent COD, ammonia nitrogen water quality data, the blower operating frequency, and the aeration pipeline valve opening data.

[0052] After further processing the data from the first data acquisition module 26 using the control module 27 with a built-in deep learning model, the blower operating frequency and the aeration pipeline valve opening value are fed back to the blower PLC cabinet to control the blower and valve. Finally, a long-term and short-term memory model of inlet and outlet water quality, inlet water volume, sludge concentration, sludge settling ratio, dissolved oxygen in the biochemical system, aeration pipeline valve opening, and blower operating frequency is established and built into the control module 27.

[0053] As one of the specific embodiments of the present invention, a fixed period of time, such as 30 seconds, is selected to collect data in step (3) to form a database, and the model is debugged based on one month of data collected in the database, so that the model can accurately describe the relationship between the dissolved oxygen change in the biochemical pool and its influencing parameters. Figure 2 As shown, the model prediction values ​​are in good agreement with the actual change values, indicating that this model can accurately describe the relationship between the dissolved oxygen change in the biochemical pond and its influencing parameters.

[0054] In step (5), preferably, the user can customize the target value of dissolved oxygen concentration in the biochemical pool and set it in the control module. The control module calculates the blower frequency value and valve opening value that need to be adjusted and feeds back to the PLC cabinet to adjust the equipment parameters.

[0055] Furthermore, the data in the database are updated in real time, so that the model can obtain the latest data and continuously optimize the model to ensure its accuracy in describing the relationship between the changes in dissolved oxygen in the biochemical pond and its influencing parameters.

[0056] In step (6), when the fluctuation range of dissolved oxygen exceeds the target value by 20%, it is considered that the dissolved oxygen control is abnormal. At this time, the control module issues an alarm command, which is transmitted to the display 28 connected to the control module to prompt manual attention. The changes in dissolved oxygen in the biochemical pool, the real-time operating parameters of the blower and the aeration pipeline valve can be observed on the display 28. The display 28 is equipped with a precise aeration system start and stop button, and the precise system can be started or shut down manually with one button, ensuring that manual intervention can be made at any time.

[0057] The model needs to ensure that the sludge settling ratios at different depths of the biochemical pool are similar while ensuring that the dissolved oxygen is within the target range. The control module obtains the mean of the settling ratios at different depths, and the target controls the settling ratios at different depths of the biochemical pool to be within 5% of the mean. The control module can further adjust the gas flow of the perforated aeration pipe to mix the carrier and activated sludge in the system by adjusting the opening size of the first aeration valve and the second aeration valve. If the bottom sedimentation is relatively high, it indicates that carrier deposition has occurred, and the gas flow of the perforated aeration needs to be increased.

[0058] Example 1

[0059] See Figure 4 As shown in the figure, according to the control method described above, the sensor data of the water inlet and outlet and the biochemical pool are first collected through the data module; then, the control module with a built-in long-short memory model is used to set the dissolved oxygen target value, and the data collected by the data module gives the values ​​that the blower frequency and the aeration valve should be adjusted; finally, the PLC cabinet receives the signal from the control module to adjust the equipment working parameters of the aeration system. Figure 3 As shown, it is the existing dissolved oxygen fluctuation curve obtained by artificial regulation.

[0060] By comparison Figure 2-3 , we can get: (1) The change trend of dissolved oxygen predicted by the deep learning model in the present invention is in good agreement with the actual change of dissolved oxygen, indicating that the constructed deep learning model can accurately describe the relationship between the data collected by the data acquisition module and the change of dissolved oxygen. (2) Under the control of the precise aeration system in the present invention, the fluctuation amplitude of dissolved oxygen is greatly reduced compared with the artificial control biochemical system.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A powder carrier biological fluidized bed process precision aeration control system, characterized by: It includes a water inlet pipe (1), an anaerobic zone (5), an anoxic zone (6), an aeration system, an aerobic zone (29), a secondary sedimentation tank (16), a water outlet pipe (20), a blower (23), a sludge sampler (8), a sludge settling ratio detection device (7), and a powder carrier; The water inlet end of the water inlet pipe (1) is installed with a plurality of sensors and connected to the anaerobic zone (5); the water outlet end of the anaerobic zone (5) is connected to the input end of the aerobic zone (29); the output end of the aerobic zone (29) is connected to the secondary sedimentation tank (16); the water outlet pipe (20) is installed at the water outlet end of the secondary sedimentation tank (16); A plurality of sensors for measuring effluent water are installed at the end of the effluent pipe (20) of the secondary sedimentation tank (16); The aeration system is connected to the blower (23) and is used to aerate the aerobic zone (29); The powder carrier is placed in a biochemical pool, which includes an anaerobic zone, an anoxic zone, and an aerobic zone. Sampling is performed by a sludge sampler (8) installed in the aerobic zone (29) of the biochemical pool, and a sludge settling ratio detection device (7) is used to measure the sludge settling ratio after the powder carrier has been settling for a period of time.

2. According to claim 1, a powder carrier biological fluidized bed process precise aeration control system is characterized by: The aeration system comprises an aeration main pipe (9), a microporous aeration delivery pipe (11), a perforated aeration delivery pipe (13), a microporous aeration head (14), and a perforated aeration pipe (15); wherein one end of the aeration main pipe (9) is connected to a blower (23); and the other end is divided into independent microporous aeration delivery pipes (11) and perforated aeration delivery pipes (13); the microporous aeration delivery pipes (11) and perforated aeration delivery pipes (13) are independently connected to a first aeration valve (10) and a second aeration valve (12) and are in communication with the microporous aeration head (14) and the perforated aeration pipe (15) at the bottom of the aerobic tank (29).

3. According to claim 2, a powder carrier biological fluidized bed process precise aeration control system is characterized by: It also includes a vent pipe (21) and a vent valve (22); wherein the blowers (23) include two blowers (23), the two blowers (23) have different frequencies, and the aeration main pipe (9) is directly connected to the vent pipe (21) and the vent valve (22).

4. According to claim 1, a powder carrier biological fluidized bed process precise aeration control system is characterized by: It also includes a temperature detection structure, which is directly connected to the blower and is used to detect the internal temperature of the blower.

5. According to claim 1, a powder carrier biological fluidized bed process precise aeration control system is characterized by: The sensors at the water inlet end of the water inlet pipe (1) include a water inlet flow rate monitoring sensor (2), a water inlet COD concentration monitoring sensor (3), and a water inlet ammonia nitrogen concentration monitoring sensor; the sensors at the water outlet pipe (20) end of the secondary sedimentation tank (16) include a water outlet COD concentration monitoring sensor (17) and a water outlet ammonia nitrogen concentration monitoring sensor (18).

6. According to claim 1, a powder carrier biological fluidized bed process precise aeration control system is characterized by: It also includes a biochemical pool PLC cabinet (24) for receiving the collected data sets of all sensors for transmission, wherein all sensors in the system are electrically connected to the biochemical pool PLC cabinet (24).

7. According to claim 1, a precise aeration control system for a powder carrier biological fluidized bed process, characterized in that: It also includes a blower PLC cabinet (25) for receiving valve and blower data and transmitting, wherein the blower PLC cabinet (25) is electrically connected to the control valve of the aeration system and the blower control valve of the blower.

8. A method for precise aeration control of a powder carrier biological fluidized bed process, characterized in that: The method is the specific steps of a powder carrier biological fluidized bed process precision aeration control system according to any one of claims 1 to 7: (1) Setting measurement sensors at the inlet of the biochemical pool, the aerobic pool, and the second sedimentation outlet to collect data one; (2) collecting data 2 of the aeration valve opening of the aeration system and data 3 of the fan frequency of the blower; (3) adding a powder carrier to the biochemical pool, and determining the sludge settling ratio of the powder carrier at different depths in the biochemical pool at the target time value as data 4; (4) Using data 1 to 4 collected within a period of time as a training set, establishing a deep learning model to process the data, and establishing a long short-term memory model database of data 2 and data 3 corresponding to data 1 and data 4 under the model; until the model prediction value is consistent with the actual change value, stop training; (5) Select at least one data as the target parameter, update and optimize the model, and obtain the relationship between the target value and data 2 and data 3; (6) When the measured value exceeds the set threshold of the target parameter in (5), an alarm command will be issued to prompt human attention through the display; or the dissolved oxygen change, the blower and the real-time operating parameters of the aeration pipeline valve will be displayed on the display; and the aeration system start and stop function can be set on the display to stop aeration or start or shut down with one button.

9. The method for precise aeration control of a powder carrier biological fluidized bed process according to claim 1, characterized in that: The data one includes the influent COD and ammonia nitrogen water quality data of the biochemical pool, the influent water volume data, the biochemical pool sludge concentration and dissolved oxygen data, and the effluent COD and ammonia nitrogen water quality data.

10. The method for precise aeration control of a powder carrier biological fluidized bed process according to claim 1, characterized in that: In step (5), the target parameter is the dissolved oxygen concentration, and the threshold is set to 20% of the target dissolved oxygen concentration value.

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