Urban sewage short-cut nitrification effect prediction device and use method thereof

Abstract

The application discloses a kind of urban sewage short path nitrification effect prediction device and its using method.The urban sewage short path nitrification effect prediction device includes activated sludge detection system and control adjustment system.The application detects the activity of some bacterial flora in activated sludge by maintaining an optimal environment for the growth of nitrite oxidizing bacteria, with a simple process flow, flexible control operation and high accuracy.The short path prediction device of the application has the advantages of simple structure, reasonable design, flexible and convenient operation, high processing efficiency, easy to carry, stable operation, safety and reliability, etc.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment microbial activity detection technology, and more specifically, relates to a device for predicting the short-cut nitrification effect of urban wastewater and its usage method. Background Technology

[0002] The most common process for urban wastewater treatment is the activated sludge process. The traditional activated sludge process uses activated sludge operating in alternating anoxic and aerobic environments to simultaneously remove multiple pollutants. In the aerobic environment, microorganisms carry out nitrification to remove some organic matter, while under anoxic conditions, denitrification is achieved using organic matter. The denitrification efficiency of conventional nitrification and denitrification processes is significantly affected by organic matter, and denitrification efficiency is generally low under low carbon-to-nitrogen ratio conditions. In some urban wastewater systems, the carbon-to-nitrogen ratio is generally low, and the organic matter in the influent is not efficiently utilized, resulting in difficulty in consistently meeting nitrogen standards in the effluent, thus failing to meet the basic requirements for reclaimed water reuse.

[0003] The emergence of short-cut nitrification / anaerobic ammonium oxidation (ANAO) processes offers a new approach to urban wastewater treatment and reuse. Short-cut nitrification oxidizes some ammonia nitrogen into nitrite, which is then directly converted into nitrogen gas via subsequent ANAO. This process boasts significant advantages, including high treatment load, low energy consumption, no need for external carbon sources, and low sludge production. Anaerobic ammonium oxidation achieves the separation of carbon and nitrogen pollutant removal, transforming wastewater treatment processes and representing a core technology for future water treatment development.

[0004] The process flow based on anammox technology places higher demands on the stability of cut-cut nitrification. Stable operation of cut-cut nitrification is a sufficient condition for the stable operation of anammox; only a stable cut-cut nitrification reaction can provide the necessary ammonia nitrogen and nitrite substrates for the subsequent anammox growth. If cut-cut nitrification cannot be achieved, then anammox cannot be achieved either. Therefore, the stable operation of the cut-cut nitrification reaction is crucial to the success or failure of anammox technology. In current research on anammox technology for low-ammonia nitrogen wastewater both domestically and internationally, the inability to accurately determine the stability of the cut-cut nitrification reaction can lead to its destruction and consequently, the loss of activity of anammox bacteria. To address this issue, it is necessary to consider how to quickly and accurately monitor the stability of the cut-cut nitrification reaction, predict its trend, and make timely process adjustments to prevent its destruction. Therefore, researching a device for predicting the effect of cut-cut nitrification in urban wastewater is of paramount importance. Summary of the Invention

[0005] In view of the inadequacy of existing technologies in predicting the short-cut nitrification stability of urban wastewater, the purpose of this invention is to provide a device for predicting the short-cut nitrification effect of urban wastewater and its operation method. The device and operation method have the advantages of simple structure, reasonable design, flexible and convenient operation, high accuracy, portability and safety.

[0006] To achieve the above objectives, a first aspect of the present invention provides a device for predicting the short-cut nitrification effect of urban wastewater, the device comprising an activated sludge detection system and a control and regulation system.

[0007] The activated sludge detection system includes a heating water tank, an aeration tank, a reagent tank, and an air pump;

[0008] The heating water tank is equipped with a temperature-controlled heating rod for heating the water in the tank, a submersible propeller for stirring, and a heating water tank drain valve connected to the bottom of the heating water tank for draining the liquid in the heating water tank.

[0009] The aeration tank is equipped with a sampling port and an aeration disc at the bottom, which is connected to an aeration pipe.

[0010] The reagent tank includes an acid reagent tank, an alkaline reagent tank, and an ammonia reagent tank, which are respectively connected to the vent valves of the acid reagent tank, the alkaline reagent tank, and the ammonia reagent tank for draining the reagent solution in the reagent tank;

[0011] The air pump is connected to the aeration pipe at the bottom of the aeration tank via an air volume regulating valve;

[0012] The control and regulation system includes a controller, a dosing pump, and an online water quality monitoring probe installed in the aeration tank;

[0013] The controller is connected to the online water quality monitoring probe, the air volume regulating valve, and the dosing pump via signal lines; the dosing pump injects the corresponding chemicals into the aeration tank via acid dosing pipe, alkali dosing pipe, and ammonia dosing pipe, respectively.

[0014] The monitoring indicators of the online monitoring probe include: NH4 + -N concentration, NO3 - Based on data transmitted from the online monitoring probe, the concentration of nitrogen (N), pH value, and dissolved oxygen are monitored, and the dosing rate of the dosing pump and the opening of the gas flow regulating valve are adjusted in real time by the controller.

[0015] Preferably, a gas flow meter is also installed between the gas volume regulating valve and the aeration pipe.

[0016] Preferably, there are multiple aeration tanks, and each aeration tank can operate independently.

[0017] Preferably, there are three aeration tanks.

[0018] Preferably, each aeration tank is provided with at least two sampling ports, at least one located at the bottom of the aeration tank and at least one located at the top of the aeration tank.

[0019] Preferably, each aeration tank is provided with 4 sampling ports, which are evenly distributed along the vertical axis of the aeration tank.

[0020] Preferably, the top of the acid reagent tank, the alkali reagent tank, and the ammonia reagent tank are all provided with one-way sealing caps.

[0021] A second aspect of the present invention provides a method for using a device for predicting the short-cut nitrification effect of urban wastewater, characterized in that the method includes the following steps:

[0022] 1) Fill the heating water tank with water, turn on the temperature control heating rod and the submersible thruster, and adjust the temperature control heating rod to 26-30℃; add hydrochloric acid solution to the acid reagent tank, add sodium bicarbonate solution to the alkali reagent tank, and add ammonium bicarbonate solution to the ammonia reagent tank.

[0023] 2) Take the activated sludge to be tested, wash it with water, pour it into the aeration tank, and then add water to dilute it to the highest water level line of the aeration tank.

[0024] 3) Turn on the controller and air pump. The online water quality monitoring probe transmits the monitoring value to the controller 9. After processing by the controller, the opening of the air volume regulating valve is adjusted in real time. The gas is delivered to the corresponding aeration disc through the aeration pipe to ensure that the DO value in the aeration tank is maintained between 2.5-3 mg / L. At the same time, the controller controls the dosing pump to first add the ammonia reagent from the ammonia reagent tank to the aeration tank through the ammonia dosing pipe. Then, according to the pH value measured by the online water quality monitoring probe, the controller controls the dosing pump to inject the reagent from the acid reagent tank or alkali reagent tank into the aeration tank through the corresponding acid dosing pipe and alkali dosing pipe to stabilize the pH value in the aeration tank between 6.8-7.2.

[0025] 4) Under the above control conditions, maintain the continuous operation of the aeration tank. When the NH4 level is monitored by the online water quality monitoring probe... + -N concentration drops to 0 mg / L and is completely oxidized to NO3. - After -N, the total measurement time is H;

[0026] 5) When H≥18h, it indicates that the activated sludge reaction is stable and no changes to the operating parameters are needed;

[0027] When 12≤H<18h, it indicates that there is a risk of short-range damage to the activated sludge, and the dissolved oxygen concentration in the aeration tank needs to be reduced to avoid short-range damage.

[0028] When 6≤H<12h, it indicates that the activated sludge has shown signs of short-range damage, and it is necessary to reduce the dissolved oxygen concentration in the aeration tank and increase the sludge discharge from the system.

[0029] When H < 6h, it indicates that the short-cut nitrification of the system has been damaged. It is necessary to immediately reduce the dissolved oxygen concentration in the aeration tank and increase the sludge discharge from the system. At the same time, nitrite-oxidizing bacteria inhibitors should be added to the system to restore the short-cut nitrification and achieve a stable short-cut nitrification reaction.

[0030] Preferably, after measuring the total time, the method further includes:

[0031] Turn off all power to the device, open the drain valves of the heating water tank, sampling port, acid reagent tank, alkali reagent tank, and ammonia reagent tank, release all solutions in the device and clean it, then close all valves.

[0032] As a preferred option, in step 5), the dissolved oxygen concentration in the aeration tank (2) is reduced to 1-1.5 mg / L.

[0033] The beneficial effects of this invention are:

[0034] The short-range prediction device of this invention has the advantages of simple structure, reasonable design, flexible and convenient operation, high processing efficiency, portability, stable operation, and safety and reliability. During use, the short-range prediction device of this invention can detect the activity level of nitrite-oxidizing bacteria by maintaining an optimal environment conducive to their growth. It is applicable to the activity detection of a certain bacterial group in activated sludge, with a simple process flow, flexible control operation, and high accuracy.

[0035] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0036] The above and other objects, features and advantages of the present invention will become more apparent from the more detailed description of exemplary embodiments of the invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the invention.

[0037] Figure 1 A schematic diagram of a device for predicting the short-cut nitrification effect of urban wastewater according to an embodiment of the present invention is shown.

[0038] Figure 2 The diagram shows a right-side view of a device for predicting the short-range nitrification effect of urban wastewater according to an embodiment of the present invention.

[0039] Figure 3 A top view schematic diagram of a device for predicting the short-range nitrification effect of urban wastewater according to an embodiment of the present invention is shown;

[0040] Explanation of reference numerals in the attached diagram: 1-Heating water tank, 2-Aeration tank, 3-Aeration disc, 4-Air pump; 5-Acid reagent tank; 6-Alkali reagent tank, 7-Ammonia reagent tank, 8-Dosing pump, 9-Controller, 10-Gas flow regulating valve, 11-Gas flow meter, 12-Submersible thruster, 13-Temperature-controlled heating rod, 14-Online water quality monitoring probe, 15-Sampling port, 16-Heating water tank vent valve, 17-Acid reagent tank vent valve, 18-Alkali reagent tank vent valve, 19-Ammonia reagent tank vent valve, 20-Alkali addition pipe, 21-Acid addition pipe, 22-Ammonia addition pipe, 23-Aeration pipe. Detailed Implementation

[0041] Preferred embodiments of the invention will now be described in more detail. While preferred embodiments of the invention are described below, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0042] The first aspect of the present invention provides a device for predicting the short-range nitrification effect of urban sewage, the device comprising an activated sludge detection system and a control and regulation system;

[0043] The activated sludge testing system includes a heating water tank, an aeration tank, a reagent tank, and an air pump;

[0044] The heating water tank is equipped with a temperature-controlled heating rod for heating the water in the tank, a submersible propeller for stirring, and a heating water tank drain valve connected to the bottom of the heating water tank for draining the liquid in the heating water tank.

[0045] The aeration tank is equipped with a sampling port and an aeration disc at the bottom, which is connected to an aeration pipe.

[0046] The reagent tank includes an acid reagent tank, an alkali reagent tank, and an ammonia reagent tank, which are respectively connected to the vent valves of the acid reagent tank, the vent valve of the alkali reagent tank, and the vent valve of the ammonia reagent tank for draining the reagent solution in the reagent tank;

[0047] The air pump is connected to the aeration pipe at the bottom of the aeration tank via an air volume regulating valve;

[0048] The control and regulation system includes a controller, a dosing pump, and an online water quality monitoring probe installed in the aeration tank;

[0049] The controller is connected to the online water quality monitoring probe, the air volume regulating valve, and the dosing pump via signal lines; the dosing pump injects the corresponding chemicals into the aeration tank via acid dosing pipe, alkali dosing pipe, and ammonia dosing pipe, respectively.

[0050] The monitoring indicators of the online monitoring probe include: NH4 + -N concentration, NO3- Based on data transmitted from the online monitoring probe, the concentration of nitrogen (N), pH value, and dissolved oxygen are monitored, and the dosing rate of the dosing pump and the opening of the gas flow regulating valve are adjusted in real time by the controller.

[0051] As a preferred option, a gas flow meter is also installed between the gas volume regulating valve and the aeration pipe.

[0052] As a preferred option, there are multiple aeration tanks, each of which can operate independently. In actual operation, three aeration tanks are preferred.

[0053] As a preferred embodiment, each aeration tank is provided with at least two sampling ports, at least one located at the bottom of the aeration tank and at least one located at the top of the aeration tank. As a further preferred embodiment, each aeration tank is provided with four sampling ports, which are evenly distributed along the vertical axis of the aeration tank.

[0054] As a preferred option, the tops of the acid reagent tank, alkali reagent tank, and ammonia reagent tank are all equipped with one-way sealing covers, which can ensure that the reagents do not overflow and maintain the same air pressure inside and outside the reagent tank.

[0055] As a preferred option, the flow rate of the dosing pump is constant. For a 3L aeration tank, the dosing flow rate of the three liquid agents is 10-40mL / min, such as 20mL / min.

[0056] A second aspect of the present invention provides a method for using the above-mentioned device for predicting the short-cut nitrification effect of urban wastewater, the method comprising the following steps:

[0057] 1) Fill the heating water tank with water, turn on the temperature control heating rod and the submersible thruster, and adjust the temperature control heating rod to 26-30℃; add hydrochloric acid solution to the acid reagent tank, add sodium bicarbonate solution to the alkali reagent tank, and add ammonium bicarbonate solution to the ammonia reagent tank.

[0058] 2) Take the activated sludge to be tested, wash it with water, pour it into the aeration tank, and then add water to dilute it to the highest water level line of the aeration tank.

[0059] 3) Turn on the controller and air pump. The online water quality monitoring probe transmits the monitoring value to the controller. After processing, the controller adjusts the opening of the air volume regulating valve in real time. The gas is delivered to the corresponding aeration disc through the aeration pipe to ensure that the DO value in the aeration tank is maintained between 2.5-3 mg / L. At the same time, the controller controls the dosing pump to first add the ammonia reagent from the ammonia reagent tank to the aeration tank through the ammonia dosing pipe. Then, based on the pH value measured by the online water quality monitoring probe, the controller controls the dosing pump to inject the acid reagent from the acid reagent tank or the alkali reagent tank into the aeration tank through the corresponding acid dosing pipe and alkali dosing pipe, so that the pH value in the aeration tank is stabilized between 6.8-7.2.

[0060] 4) Under the above control conditions, maintain the continuous operation of the aeration tank. When the NH4 level is monitored by the online water quality monitoring probe... + -N concentration drops to 0 mg / L and is completely oxidized to NO3. - After -N, the total measurement time is H;

[0061] 5) When H≥18h, it indicates that the activated sludge reaction is stable and no changes to the operating parameters are needed;

[0062] When 12≤H<18h, it indicates that there is a risk of short-range damage to the activated sludge, and the dissolved oxygen concentration in the aeration tank needs to be reduced to avoid short-range damage.

[0063] When 6≤H<12h, it indicates that the activated sludge has shown signs of short-range damage, and it is necessary to reduce the dissolved oxygen concentration in the aeration tank and increase the sludge discharge from the system.

[0064] When H < 6h, it indicates that the short-cut nitrification of the system has been damaged. It is necessary to immediately reduce the dissolved oxygen concentration in the aeration tank and increase the sludge discharge from the system. At the same time, nitrite-oxidizing bacteria inhibitors should be added to the system to restore the short-cut nitrification and achieve a stable short-cut nitrification reaction.

[0065] As a preferred option, in step 5), reducing the dissolved oxygen concentration in the aeration tank means reducing the dissolved oxygen concentration from 2.5-3 mg / L to 1-1.5 mg / L.

[0066] As a preferred option, after measuring the total time, the following is also included:

[0067] Turn off all power to the device, open the drain valves of the heating water tank, sampling port, acid reagent tank, alkali reagent tank, and ammonia reagent tank, release all solutions in the device and clean it, then close all valves.

[0068] Example

[0069] This embodiment provides a device for predicting the short-cut nitrification effect of urban wastewater. Figure 1 A schematic diagram of a device for predicting the short-cut nitrification effect of urban wastewater according to an embodiment of the present invention is shown. Figure 2 The diagram shown is a right-side view of a device for predicting the short-cut nitrification effect of urban wastewater according to an embodiment of the present invention. Figure 3 A top view schematic diagram of a device for predicting the short-range nitrification effect of urban wastewater according to an embodiment of the present invention is shown, as follows: Figure 1 , Figure 2 , Figure 3As shown, the short-cut nitrification effect prediction device for urban wastewater includes an activated sludge detection system and a control and regulation system. The activated sludge detection system includes a heating water tank 1, an aeration tank 2, a reagent tank, and an air pump 4. The heating water tank 1 is equipped with a temperature-controlled heating rod 13 for heating the water in the heating water tank 1, a submersible propeller 12 for stirring, and a heating water tank vent valve 16 connected to the bottom of the heating water tank 1 for draining the liquid in the heating water tank 1. The aeration tank 2 is equipped with a sampling port 15 and an aeration disc 3 at the bottom, which is connected to an aeration pipe 23. The reagent tank includes an acid reagent tank 5, an alkali reagent tank 6, and an ammonia reagent tank 7, which are respectively... The system is connected to the vent valves 17, 18, and 19 of the acid, alkali, and ammonia tanks to drain the chemicals from the tanks. An air pump 4 is connected to the aeration pipe 23 at the bottom of the aeration tank 2 via a gas flow regulating valve 10. The control system includes a controller 9, a dosing pump 8, and an online water quality monitoring probe 14 installed within the aeration tank 2. The controller 9 is connected to the online water quality monitoring probe 14, the gas flow regulating valve 10, and the dosing pump 8 via signal lines. The dosing pump 8 injects the corresponding chemicals into the aeration tank 2 via the acid dosing pipe 21, the alkali dosing pipe 20, and the ammonia dosing pipe 22. The online monitoring probe 14 monitors indicators including NH4+. + -N concentration, NO3 - -N concentration, pH value, and dissolved oxygen are monitored in real time by the controller 9, which adjusts the dosage of the dosing pump 8 and the opening of the gas flow regulating valve 10 based on data transmitted from the online monitoring probe 14. A gas flow meter 11 is also installed between the gas flow regulating valve 10 and the aeration pipe 23. There are three aeration tanks 2, each of which can operate independently. Each aeration tank 2 is equipped with four sampling ports 15, which are evenly distributed along the vertical axis of the aeration tank 2. The tops of the acid reagent tank 5, the alkali reagent tank 6, and the ammonia reagent tank 7 are all equipped with one-way sealing covers (not shown).

[0070] In this embodiment, the activated sludge detection system is designed to be 70cm long, the control and regulation system is designed to be 35cm long, the short-range nitrification effect prediction device for urban sewage is designed to be 105cm long and 26cm wide, the aeration tank 2 is designed to be 15cm in diameter, and the spacing between each aeration tank 2 is designed to be 5cm.

[0071] The method of use includes the following steps, wherein the dosage of each agent is relative to a 3L aeration tank 2:

[0072] 1) Fill the heating water tank 1 with pure water, turn on the temperature control heating rod 13 and the submersible thruster 12, and adjust the temperature control heating rod 13 to 28℃; add 250mL of 30% hydrochloric acid solution to the acid reagent tank 5, add 250mL of 20g / L sodium bicarbonate solution to the alkali reagent tank 6, and add 250mL of 15g / L ammonium bicarbonate solution to the ammonia reagent tank 7;

[0073] 2) Take the activated sludge to be tested (which includes heterotrophic bacteria, ammonium salt oxidizing bacteria, nitrite oxidizing bacteria and polyphosphate-accumulating bacteria) and wash it with pure water (standard: the ammonia nitrogen concentration of the washed sludge is less than 5 mg / L). Then pour it into aeration tank 2 and add water to dilute it to the highest water level line (3L) of aeration tank 2.

[0074] 3) Turn on the controller 9 and air pump 4. The online water quality monitoring probe 14 transmits the monitoring value to the controller 9. After processing by the controller 9, the opening of the air volume regulating valve 10 is adjusted in real time. The gas is delivered to the corresponding aeration disc 3 through the aeration pipe 23 to ensure that the DO value in the aeration tank 2 is maintained between 2.5-3 mg / L. At the same time, the controller 9 controls the dosing pump 8 to first add 10 mL of ammonia reagent from the ammonia reagent tank 7 to the aeration tank 2 through the ammonia dosing pipe 22. Then, according to the pH value measured by the online water quality monitoring probe 14, the controller controls the dosing pump 8 to inject the reagent from the acid reagent tank 5 or the alkali reagent tank 6 into the aeration tank 2 through the corresponding acid dosing pipe 21 and alkali dosing pipe 22 to stabilize the pH value in the aeration tank 2 between 6.8-7.2.

[0075] 4) Under the above control conditions, maintain the continuous operation of aeration tank 2, and monitor NH4 through online water quality monitoring probe 14. + -N concentration drops to 0 mg / L and is completely oxidized to NO3. - After -N, the total measurement time is H;

[0076] 5) Turn off all power to the device, open the drain valve 16 of the heating water tank, the sampling port 15, the drain valve 17 of the acid reagent tank, the drain valve 18 of the alkali reagent tank and the drain valve 19 of the ammonia reagent tank, release all the solutions in the device and clean it, then close all valves.

[0077] 6) When H≥18h, it indicates that the activated sludge reaction is stable and no changes to the operating parameters are needed;

[0078] When 12≤H<18h, it indicates that there is a risk of short-range damage to the activated sludge, and the dissolved oxygen concentration in aeration tank 2 needs to be reduced to avoid short-range damage.

[0079] When 6≤H<12h, it indicates that the activated sludge has shown signs of short-range damage, and it is necessary to reduce the dissolved oxygen concentration in aeration tank 2 and increase the system sludge discharge.

[0080] When H < 6h, it indicates that the short-range system has been damaged. The dissolved oxygen concentration in the aeration tank (2) should be reduced immediately, and the sludge discharge from the system should be increased. At the same time, nitrite oxidizing bacteria inhibitors should be added to the system to restore the short-range system and achieve a stable short-range nitrification reaction.

[0081] In step 5), reducing the dissolved oxygen concentration in the aeration tank means reducing the dissolved oxygen concentration from 2.5-3 mg / L to 1-1.5 mg / L.

[0082] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A method for using a device for predicting the short-cut nitrification effect of urban wastewater, characterized in that, The device for predicting the short-range nitrification effect of urban wastewater includes an activated sludge detection system and a control and regulation system. The activated sludge detection system includes a heating water tank (1), an aeration tank (2), a reagent tank, and an air pump (4). The heating water tank (1) is equipped with a temperature-controlled heating rod (13) for heating the water in the heating water tank (1), a submersible thruster (12) for stirring, and a heating water tank drain valve (16) connected to the bottom of the heating water tank (1) for draining the liquid in the heating water tank (1). The aeration tank (2) is provided with a sampling port (15) and an aeration disc (3) at the bottom, which is connected to the aeration pipe (23). The reagent tank includes an acid reagent tank (5), an alkali reagent tank (6) and an ammonia reagent tank (7), which are respectively connected to the acid reagent tank vent valve (17), the alkali reagent tank vent valve (18) and the ammonia reagent tank vent valve (19) for draining the reagent liquid in the reagent tank; The air pump (4) is connected to the aeration pipe (23) at the bottom of the aeration tank (2) via the air volume regulating valve (10); The control and regulation system includes a controller (9), a dosing pump (8), and an online water quality monitoring probe (14) installed in the aeration tank (2). The controller (9) is connected to the online water quality monitoring probe (14), the gas volume regulating valve (10) and the dosing pump (8) respectively via signal lines; the dosing pump (8) injects the corresponding agents into the aeration tank (2) through the acid dosing pipe (21), the alkali dosing pipe (20) and the ammonia dosing pipe (22) respectively. The monitoring indicators of the online water quality monitoring probe (14) include: NH4 + -N concentration, NO3 - -N concentration, pH value and dissolved oxygen, according to the data transmitted back by the online monitoring probe (14), the dosing amount of the dosing pump (8) and the opening degree of the gas flow regulating valve (10) are adjusted in real time by the controller (9); The usage method includes the following steps: 1) Fill the heating water tank (1) with water, turn on the temperature control heating rod (13) and the submersible thruster (12), and adjust the temperature control heating rod (13) to 26-30℃; add hydrochloric acid solution to the acid reagent tank (5), add sodium bicarbonate solution to the alkali reagent tank (6), and add ammonium bicarbonate solution to the ammonia reagent tank (7); 2) Take the activated sludge to be tested, wash it with water and pour it into the aeration tank (2), then add water to dilute it to the highest water level line of the aeration tank (2); the ammonia nitrogen concentration of the washed sludge is less than 5 mg / L; 3) Turn on the controller (9) and air pump (4). The online water quality monitoring probe (14) transmits the monitoring value to the controller (9). After processing by the controller (9), the opening of the gas volume regulating valve (10) is adjusted in real time. The gas is delivered to the corresponding aeration plate (3) through the aeration pipe (23) to ensure that the DO value in the aeration tank (2) is maintained between 2.5-3 mg / L. At the same time, the controller (9) first adds the agent in the ammonia agent tank (7) to the aeration tank (2) through the ammonia addition pipe (22) by controlling the dosing pump (8). Then, according to the pH value measured by the online water quality monitoring probe (14), the agent in the acid agent tank (5) or the alkali agent tank (6) is injected into the aeration tank (2) through the corresponding acid addition pipe (21) and alkali addition pipe (20) by controlling the dosing pump (8) to stabilize the pH value in the aeration tank (2) between 6.8-7.

2. 4) Under the above control conditions, maintain the continuous operation of the aeration tank (2), and monitor NH4 through the online water quality monitoring probe (14). + -N concentration drops to 0 mg / L and is completely oxidized to NO3. - After -N, the total measurement time is H; 5) When H≥18h, it indicates that the activated sludge reaction is stable and no change in operating parameters is required; When 12≤H<18h, it indicates that there is a risk of short-range damage to the activated sludge, and the dissolved oxygen concentration in the aeration tank (2) needs to be reduced to avoid short-range damage. When 6≤H<12h, it indicates that the activated sludge has shown signs of short-range damage, and it is necessary to reduce the dissolved oxygen concentration in the aeration tank (2) and increase the system sludge discharge. When H < 6h, it indicates that the short-range system has been damaged. The dissolved oxygen concentration in the aeration tank (2) should be reduced immediately, and the amount of sludge discharged from the system should be increased. At the same time, nitrite oxidizing bacteria inhibitors should be added to the system to restore the short-range system and achieve a stable short-range nitrification reaction.

2. The method of use according to claim 1, wherein, A gas flow meter (11) is also installed between the gas flow regulating valve (10) and the aeration pipe (23).

3. The method of use according to claim 1, wherein, There are multiple aeration tanks (2), and each aeration tank can operate independently.

4. The method of use according to claim 3, wherein, There are 3 aeration tanks (2).

5. The method of use according to claim 1, wherein, Each aeration tank (2) is provided with at least two sampling ports (15), at least one located at the bottom of the aeration tank (2) and at least one located at the top of the aeration tank (2).

6. The method of use according to claim 5, wherein, Each aeration tank (2) is equipped with 4 sampling ports (15), which are evenly distributed along the vertical axis of the aeration tank (2).

7. The method of use according to claim 1, wherein, The tops of the acid reagent tank (5), the alkali reagent tank (6), and the ammonia reagent tank (7) are all equipped with one-way sealing covers.

8. The method of use according to claim 1, after measuring the total time, further includes: Turn off all power to the device, open the vent valve (16) of the heating water tank, the sampling port (15), the vent valve (17) of the acid reagent tank, the vent valve (18) of the alkali reagent tank, and the vent valve (19) of the ammonia reagent tank, release all solutions in the device and clean it, then close all valves.

9. The method of use according to claim 1, wherein, In step 5), the dissolved oxygen concentration in the aeration tank (2) is reduced to 1-1.5 mg / L.

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