WO2023123145A1

WO2023123145A1 - New continuous-flow large-cycle anaerobic ammonium oxidation process reaction apparatus and real-time control method

Info

Publication number: WO2023123145A1
Application number: PCT/CN2021/142782
Authority: WO
Inventors: 彭永臻; 王聪; 张树军; 戚伟康
Original assignee: 北京工业大学
Priority date: 2021-12-29
Filing date: 2021-12-30
Publication date: 2023-07-06
Also published as: CN114180722A

Abstract

A continuous-flow large-cycle anaerobic ammonium oxidation process reaction apparatus, which comprises a PDA reaction tank (1), an aeration tank (2), and a PNA reaction tank (3) that are arranged in sequence, can realize continuous operation, and is simple in structure, convenient to operate, free of a stirring and mixing device, and low in maintenance cost. By using the real-time control method of the apparatus, the amount of circulation up to 20-200 times and the ascending flow velocity of 5-30 m/h can be realized; the difficulty of poor mixing and mass transfer effects of an anaerobic ammonia oxidation process for a carrier biological membrane can be solved, and full mixing and mass transfer of the carrier biological membrane subjected to anaerobic ammonia oxidation and sewage are realized; suspended microorganisms in the tank are promoted to quickly granulate, and microorganisms in the reaction apparatus are mainly granular sludge, are high in water quality and water amount impact load resistance and good in settling performance, and can be effectively retained in the reactor. Short-cut denitrification/anaerobic ammonia oxidation and short-cut nitrification/anaerobic ammonia oxidation are combined and realized in a same system, the advantages of the anaerobic ammonia oxidation process are fully played, and a new implementation solution is provided for engineering of the anaerobic ammonia oxidation process.

Description

Novel continuous flow large cycle anaerobic ammonium oxidation process reaction device and real-time control method

technical field

The invention relates to a sewage biochemical treatment device and method, belonging to the technical field of sewage biological treatment, in particular to a novel continuous flow large cycle anaerobic ammonium oxidation process reaction device and a real-time control method.

Background technique

At present, the application of the anammox process is mainly in the form of carrier biofilm and granular sludge. Among them, the carrier biofilm can achieve a good film-hanging effect and realize the retention of anammox bacteria in the reaction device, but Its main application is the integrated anammox process. Its application in the two-stage anammox process is limited by the lack of a better stirring form, resulting in the pollutants in the sewage and the carrier biofilm. It is difficult for functional bacteria to contact fully and effectively, and a good mixing effect cannot be obtained, causing sludge to accumulate on the surface of the carrier biofilm, which seriously affects the treatment effect and limits the large-scale application of the two-stage anammox process; secondly , The project starts to use the carrier biofilm as the inoculation sludge, which has great difficulties in production, transportation, storage, installation, inoculation and other aspects, and the cost is high.

The granular sludge anammox oxidation process does not require a carrier, and the granular sludge-like anammox bacteria have good settling properties, can be effectively retained in the reactor, and have high impact load resistance. They can be used as the preferred sludge for project start-up inoculation, but Its cultivation is difficult, and the world's first granular sludge anaerobic ammonium oxidation project has been started for as long as 2.5 years; in the current granular sludge anaerobic ammonium oxidation process, the formation of granular sludge is mainly by aeration And the backflow of a large proportion of liquid provides shear force, consumes a lot of electric energy, and the control conditions are difficult.

Anammox process is currently recognized as the most economical and efficient wastewater denitrification technology, but the above two problems: (1) It is difficult to obtain a good mixed mass transfer effect in biofilm process, and the engineering inoculation is difficult and costly, (2) ) Granular sludge is difficult to start quickly, the power consumption is large, and the control conditions are difficult, which seriously restricts the engineering process of the anammox process.

Contents of the invention

The purpose of the present invention is to solve the above technical problems, and propose a novel continuous-flow large-circulation anaerobic ammonium oxidation process reaction device and a real-time control method. The reaction device of the present invention can realize continuous operation, simple structure, convenient operation, no stirring and mixing equipment, and maintenance The cost is low, the circulation volume in the system is as high as 20-200 times, and the rising flow rate is 5-30m/h, which effectively realizes the full mixing and mass transfer of the anaerobic ammonium oxidation carrier biofilm and sewage, and promotes the rapid growth of suspended microorganisms in the pool. of granulation.

The first aspect of the present invention provides a novel continuous flow large cycle anaerobic ammonium oxidation process reaction device, its structure is shown in accompanying drawing 1, it is characterized in that:

The reaction device includes a PDA reaction tank, an aeration tank, a PNA reaction tank, an online DO monitor I, an online DO monitor II, an online DO monitor III, an online ammonia nitrogen monitor, an online nitrate nitrogen monitor, a blower, and a gas regulator. Flow meter, aerator, water distribution pipe, water inlet pipe, connecting pipe I, connecting pipe II, connecting pipe III, outlet pipe and control box.

Among them, the PDA reaction tank, aeration tank, and PNA reaction tank are arranged in sequence, and water distribution pipes are arranged at the bottom; the PDA reaction tank and the aeration tank are connected through the connecting pipe I, and the aeration tank and the PNA reaction tank are connected through the connecting pipe II; The PNA reaction tank is connected to the water inlet pipe at the front end of the PDA reaction tank through the connecting pipe III; the aeration tank is connected to the blower, and the aeration tank is adjusted through the aerator and the gas volume adjustment flowmeter; the PNA reaction tank is connected to the outlet pipe.

The sewage in the water inlet pipe is mixed with the liquid returned in the connecting pipe III, and enters the bottom area of the PDA reaction tank together through the water distribution pipe; the water from the upper part of the PDA reaction tank flows through the connecting pipe I, passes through the water distribution pipe, and enters the aeration tank together The bottom area of the aeration tank; the upper part of the aeration tank flows through the connecting pipe II through the water distribution pipe, and enters the bottom area of the PNA reaction tank together; the upper circulating liquid of the PNA reaction tank flows through the connecting pipe III to mix with the sewage in the inlet pipe, and the outlet water is passed through the outlet pipe emission;

The reaction device is equipped with a real-time control system, and the PNA reaction pool is equipped with an online DO monitor I, an online DO monitor II, an online DO monitor III, an online ammonia nitrogen monitor, and an online nitrate nitrogen monitor. The data of the monitor is fed back to the gas regulating flow meter according to the control program to realize the adjustment of the aeration volume.

Preferably, the shape of the PDA reaction tank, aeration tank, and PNA reaction tank can be a cube, a cylinder or an elliptical cylinder, etc., and other shapes that are improved according to the method described in the patent of the present invention are also included.

Preferably, the water distribution pipe is provided with one or more main water distribution pipes and branch pipes, with the middle plane of the pipe as the reference, only on the same horizontal plane on one side of the pipe, uniform water distribution pipes with an angle of 40 to 50 degrees are uniformly opened. Holes, the aperture and quantity of water distribution holes should be set according to the actual situation.

Preferably, the on-line DO monitor I, on-line DO monitor II, and on-line DO monitor III are respectively located in the lower, middle and upper parts of the side wall of the PNA reaction tank, and their setting points are respectively located at 1/6-6 of the longitudinal height of the tank body. 1/4, 1/2 and 3/4.

The second aspect of the present invention provides a novel continuous-flow large-cycle anammox process real-time control method, the method adopts the described novel continuous-flow large-cycle anammox reaction device, comprising the following steps:

1) Inoculation sludge: PDA reaction tank is inoculated with short-range denitrification floc sludge with stable performance and cultivated anaerobic ammonium oxidation floc sludge or carrier biofilm, the volume ratio is 1:1, so that the concentration of mixed sludge in the tank At 4-8g/L; the PNA reaction tank is inoculated with short-range nitrification floc sludge with stable performance and cultivated anaerobic ammonium oxidation floc sludge or carrier biofilm, the volume ratio is 1:1, so that the mixed sludge concentration in the tank At 4~8g/L;

2) The sewage in the water inlet pipe is mixed with the backflow liquid in the connecting pipe III, and enters the bottom area of the PDA reaction tank evenly through the water distribution pipe installed downward in the direction of the water distribution hole, with an average sludge concentration of 4-8g/L; The short-range denitrifying bacteria use the organic matter in the sewage to reduce the nitrate nitrogen in the backflow liquid in the connecting pipe III to nitrite nitrogen, and the newly formed nitrite nitrogen and ammonia nitrogen in the sewage are under the action of anammox bacteria The reaction generates nitrogen, which is discharged into the air;

3) The water from the upper part of the PDA reaction tank flows through the connecting pipe I through the water distribution pipe installed upwards through the water distribution hole, and enters the bottom area of the aeration tank together, and the aeration volume is 2-20L/(m ² ·s);

4) The water from the upper part of the aeration tank flows through the connecting pipe II through the water distribution pipe installed downwards through the water distribution hole, and enters the bottom area of the PNA reaction tank together; the average sludge concentration is 4-8g/L; The pollutant ammonia nitrogen is partially oxidized to nitrite nitrogen, and the newly formed nitrite nitrogen and the remaining ammonia nitrogen in the sewage react to form nitrogen gas under the action of anammox bacteria, which is discharged into the air;

5) The circulating liquid in the upper part of the PNA reaction tank flows through the connecting pipe III and mixes with the sewage in the water inlet pipe, and evenly enters the bottom area of the PDA reaction tank; the outlet water is discharged from the outlet pipe.

Preferably, the circulation ratio of the circulating liquid in the upper part of the PNA reaction pool is 20-200 times.

Preferably, the flow rate of the water distribution hole on the water distribution pipe is controlled at 60-300m/h; the liquid ascending flow rate in the PDA reaction tank and the PNA reaction tank is 5-30m/h, and the median diameter of the suspended microorganisms in the tank is 50-800 μm.

Preferably, the dissolved oxygen in the PNA reaction tank is 0.1-0.5 mg/L.

Preferably, the volume ratio of the PDA reaction tank, aeration tank and PNA reaction tank is 1:0.1-1:0.5-1.5, and the hydraulic retention time is 0.5-16h.

Preferably, the control box collects the data of the online monitor, and feeds back to the gas regulating flow meter according to the control program to realize the regulation of the aeration amount. The specific control program settings are as follows:

a) When any of the on-line DO monitor Ⅰ, on-line DO monitor Ⅱ, and on-line DO monitor Ⅲ in the PNA reaction tank shows dissolved oxygen > 0.5mg/L, reduce the working frequency of the blower or reduce the gas adjustment flowmeter Opening degree until the detection of dissolved oxygen is 0.1 ~ 0.5mg/L, restore the adjustment equipment to the initial state.

b) When the concentration of ammonia nitrogen in the effluent of the PNA reaction tank is greater than 4.5mg/L, increase the operating frequency of the blower or increase the opening of the gas regulating flowmeter until the concentration of ammonia nitrogen is detected to be less than 4.5mg/L, and restore the adjustment equipment to the initial state .

c) When the concentration of nitrate nitrogen in the effluent of the PNA reaction tank is greater than 10mg/L, reduce the operating frequency of the blower or reduce the opening of the gas regulating flowmeter until the concentration of nitrate nitrogen is detected to be less than 10mg/L, and restore the adjustment equipment to the initial state .

The technical solution of the present invention has the following beneficial effects:

1) Short-range denitrification/anammox can be combined with short-range nitrification/anammox and realized in the same system, which can give full play to the advantages of anammox process, achieve higher nitrogen removal efficiency, save exposure Reduce gas energy consumption, reduce greenhouse gas emissions, reduce sludge production, and reduce chemical consumption;

2) Short-range denitrifying bacteria and anammox bacteria are the dominant species in the PDA reaction tank. The short-range denitrifying bacteria can use the carbon source in the raw water to reduce the nitrate nitrogen produced by anammox to nitrite nitrogen. Then improve the theoretical denitrification efficiency of the anammox process;

3) The present invention can achieve up to 20-200 times the circulation rate and 5-30m/h ascending flow rate, can solve the problem of poor mixed mass transfer effect of the carrier biofilm anaerobic ammonium oxidation process, and can realize the anaerobic ammonium oxidation carrier biological Fully mixed mass transfer of membrane and sewage; it can solve the problems of long start-up period, large power consumption and difficult control of granular sludge anaerobic ammonium oxidation process, and can promote the rapid granulation of suspended microorganisms in the tank;

4) The microorganisms in the reaction device of the present invention are mainly granular sludge, which has strong resistance to water quality and water volume impact loads, good settling performance, and can be effectively retained in the reactor without the need for subsequent mud-water separation units, reducing the pool capacity and infrastructure costs of structures .

5) The reaction device of the present invention can realize continuous operation, has a simple structure, is convenient to operate, has no stirring and mixing equipment, and has low maintenance cost.

6) The invention is environmentally friendly, economical and efficient, and provides a new implementation scheme for the engineering of the anaerobic ammonium oxidation process.

Description of drawings

Fig. 1 is the structural representation of the novel continuous flow large cycle anaerobic ammonium oxidation process reaction device of the present invention;

The reference signs are explained as follows:

1-PDA reaction tank; 2-Aeration tank; 3-PNA reaction tank; 3.1-Online DO monitor Ⅰ; 3.2-Online DO monitor Ⅱ; 3.3-Online DO monitor Ⅲ; 3.4-Online ammonia nitrogen monitor; 3.5 -online nitrate nitrogen monitor; 4-blower; 4.1-gas regulating flowmeter; 4.2-aerator; 5-water distribution pipe; 6-water inlet pipe; 7-connecting pipe Ⅰ; Ⅲ; 10-outlet pipe; 11-control box.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the patent of the present invention is described further.

Fig. 1 is the schematic diagram of the structure and principle of the embodiment of the novel continuous flow large cycle anaerobic ammonium oxidation process reaction device provided by the present invention, the reaction device comprises a PDA reaction tank 1, an aeration tank 2, a PNA reaction tank 3, and an online DO monitor Ⅰ3.1, online DO monitor Ⅱ3.2, online DO monitor Ⅲ3.3, online ammonia nitrogen monitor 3.4, online nitrate nitrogen monitor 3.5, blower 4, gas regulating flowmeter 4.1, aerator 4.2, water distribution pipe 5 , water inlet pipe 6, connecting pipe I7, connecting pipe II8, connecting pipe III9, outlet pipe 10 and control box 11.

Among them, PDA reaction tank 1, aeration tank 2, and PNA reaction tank 3 are arranged in sequence, and water distribution pipes 5 are arranged at the bottom; PDA reaction tank 1 and aeration tank 2 are connected through connecting pipe I7, and aeration tank 2 reacts with PNA The pools 3 are connected through the connecting pipe Ⅱ8; the PNA reaction pool 3 is connected with the water inlet pipe 6 at the front end of the PDA reaction pool 1 through the connecting pipe Ⅲ9; The aeration tank 2 is used for aeration adjustment; the PNA reaction tank 3 is connected with the outlet pipe 10 .

The sewage in the water inlet pipe 6 is mixed with the liquid returned in the connecting pipe III9, and enters the bottom area of the PDA reaction tank 1 together through the water distribution pipe 5; , and enter the bottom area of the aeration tank 2 together; the water from the upper part of the aeration tank 2 flows through the connecting pipe Ⅱ8 through the water distribution pipe 5, and enters the bottom area of the PNA reaction tank 3 together; the circulating liquid in the upper part of the PNA reaction tank 3 flows through the connecting pipe Ⅲ9 is mixed with the sewage in the inlet pipe 6, and the outlet water is discharged from the outlet pipe 10;

The reaction device is provided with a real-time control system, and the PNA reaction pool 3 is provided with an online DO monitor I 3.1, an online DO monitor II 3.2, an online DO monitor III 3.3, an online ammonia nitrogen monitor 3.4, and an online nitrate nitrogen monitor. The monitoring instrument 3.5 collects the data of the online monitoring instrument by the control box 11, and feeds back to the gas regulating flowmeter 4.1 according to the control program to realize the adjustment of the aeration volume. The shape of the PDA reaction tank 1, the aeration tank 2, and the PNA reaction tank 3 can be cube, cylinder or elliptical cylinder, etc., and other shapes improved according to the method described in the patent of the present invention are also included.

The water distribution pipe 5 is provided with one or more main water distribution pipes and branch pipes, with the middle plane of the pipe as the reference, only on the same horizontal plane on one side of the pipe, there are uniform water distribution holes with an oblique direction of 40-50 degrees. The aperture and quantity of the water distribution holes should be set according to the actual situation.

The on-line DO monitor I3.1, on-line DO monitor II3.2, and on-line DO monitor III3.3 are respectively located in the lower, middle and upper parts of the side walls of the PNA reaction tank 3, and their setting points are respectively at the longitudinal height of the tank body. 1/6～1/4, 1/2 and 3/4.

The method of using the above device to treat low carbon nitrogen ratio sewage is as follows:

A real-time control method for the reaction of a novel continuous-flow large-circulation anaerobic ammonium oxidation process, the method adopts the described novel continuous-flow large-circulation anaerobic ammonium oxidation process reaction device, comprising the following steps:

1) Inoculation sludge: PDA reaction tank 1 is inoculated with short-range denitrification floc sludge with stable performance and cultivated anaerobic ammonium oxidation floc sludge or carrier biofilm, the volume ratio is 1:1, so that the sludge mixed in the tank The concentration is 4-8g/L; PNA reaction tank 3 is inoculated with short-range nitrification floc sludge with stable performance and cultivated anammox floc sludge or carrier biofilm, the volume ratio is 1:1, so that the mixed sewage in the tank The mud concentration is 4~8g/L;

2) The sewage in the water inlet pipe 6 is mixed with the returning liquid in the connecting pipe III9, and enters the bottom area of the PDA reaction tank 1 evenly through the water distribution pipe 5 installed downwards through the water distribution hole, with an average sludge concentration of 4 to 8g /L; Short-range denitrifying bacteria use the organic matter in the sewage to reduce the nitrate nitrogen in the liquid backflow in the connecting pipe III9 to nitrite nitrogen, and the newly formed nitrite nitrogen and ammonia nitrogen in the sewage are produced by the anammox bacteria Under the action of the reaction to generate nitrogen, discharged into the air;

3) The water outlet from the upper part of the PDA reaction tank 1 flows through the connecting pipe I7 through the water distribution pipe 5 installed upwards through the water distribution hole, and enters the bottom area of the aeration tank 2 together, and the aeration volume is 2-20L/(m ² ·s );

4) The outlet water from the upper part of the aeration tank 2 flows through the connecting pipe Ⅱ8 through the water distribution pipe 5 installed downwards through the water distribution hole, and enters the bottom area of the PNA reaction tank 3 together; the average sludge concentration is 4-8g/L; short-range nitrifying bacteria The pollutant ammonia nitrogen in the sewage is partially oxidized to nitrite nitrogen, and the newly formed nitrite nitrogen and the remaining ammonia nitrogen in the sewage react to form nitrogen gas under the action of anammox bacteria, which is discharged into the air;

5) The circulating liquid in the upper part of the PNA reaction tank 3 flows through the connecting pipe III 9 and mixes with the sewage in the water inlet pipe 6, and evenly enters the bottom area of the PDA reaction tank 1; the outlet water is discharged from the outlet pipe 10.

The circulation ratio of the circulating liquid in the upper part of the PNA reaction pool 3 is 20-200 times.

The flow rate of the water distribution holes on the water distribution pipe 5 is controlled at 60-300m/h; the liquid ascending flow rate in the PDA reaction tank 1 and the PNA reaction tank 3 is 5-30m/h, and the suspended microorganisms in the tanks are at a median The diameter is 50-800 μm.

The dissolved oxygen in the PNA reaction tank 3 is 0.1-0.5 mg/L.

The volume ratio of the PDA reaction tank 1, the aeration tank 2 and the PNA reaction tank 3 is 1:0.1-1:0.5-1.5, and the hydraulic retention time is 0.5-16h.

The control box 11 collects the data of the on-line monitor, and feeds back to the gas regulating flow meter 4.1 according to the control program to realize the regulation of the aeration rate. The specific control program settings are as follows:

a) When any of the on-line DO monitor Ⅰ3.1, on-line DO monitor Ⅱ3.2, and on-line DO monitor Ⅲ3.3 in the PNA reaction tank 3 shows dissolved oxygen > 0.5mg/L, reduce the work of blower 4 Frequency or reduce the opening of the gas regulating flowmeter 4.1 until the detected dissolved oxygen is 0.1-0.5 mg/L, and restore the regulating equipment to the initial state.

b) When the concentration of ammonia nitrogen in the effluent of PNA reaction tank 3 > 4.5mg/L, increase the operating frequency of the blower 4 or increase the opening of the gas regulating flowmeter 4.1 until the ammonia nitrogen concentration is detected < 4.5mg/L, and restore the regulating equipment to the initial state.

c) When the concentration of nitrate nitrogen in the effluent of PNA reaction tank 3 > 10 mg/L, reduce the operating frequency of the blower 4 or reduce the opening of the gas regulating flow meter 4.1 until the concentration of nitrate nitrogen is detected < 10 mg/L, and restore the adjustment equipment to the initial state.

Example 1

The characteristics of water quality using this device are: COD=40~300mg/L, TN=25~60mg/L, NH ₄ ⁺ -N=22~58mg/L, C/N=1.1~4.6 (average value is 2.3) Urban sewage is treated, and the treatment capacity is Q=3.5L/h. The sludge in the PDA reaction tank and the PNA reaction tank is uniformly mixed, the sludge concentration is maintained at 6-7g/L, the rising flow rate is 6m/h, and the median diameter of microorganisms is 80μm; the PDA reaction tank, aeration tank and PNA reaction tank The volume ratio is 1:0.8:1; the hydraulic retention time is 12h; the sludge is not actively discharged; the initial aeration volume of the aeration tank is set to 9L/(m ² ·s), and the circulation multiple of the circulating liquid is 30 times in the PNA reaction tank Dissolved oxygen is controlled at 0.2-0.5mg/L, and the aeration rate is adjusted according to the set procedure according to the dissolved oxygen in the PNA reaction tank and the readings of the on-line monitor. The effluent COD is within 50mg/L, the effluent NH ₄ ⁺ -N is within 2mg/L, and the effluent TN is within 5mg/L.

The above are specific embodiments of the present invention, which are convenient for those skilled in the art to understand and apply, and the implementation of the present invention is not limited thereto.

Claims

A novel continuous-flow large-cycle anaerobic ammonium oxidation process reaction device, characterized in that:

The reaction device comprises a PDA reaction tank (1), an aeration tank (2), and a PNA reaction tank (3) arranged in sequence, and a water distribution pipe (5) is arranged at the bottom; the PDA reaction tank (1) and the aeration tank (2 ) are connected through the connecting pipe I (7), the aeration tank (2) is connected with the PNA reaction tank (3) through the connecting pipe II (8); the PNA reaction tank (3) is connected with the The water inlet pipe (6) at the front end of the PDA reaction tank (1) is connected; the aeration tank (2) is connected with the air blower (4), and the aeration tank (2) is carried out by the aerator (4.2) and the air volume regulating flow meter (4.1). Aeration adjustment; the PNA reaction tank (3) is connected to the outlet pipe (10);

The sewage in the water inlet pipe (6) is mixed with the backflow liquid in the connecting pipe III (9), and enters into the bottom area of the PDA reaction tank (1) together through the water distribution pipe (5); The water flows through the connecting pipe Ⅰ (7) through the water distribution pipe (5), and enters the bottom area of the aeration tank (2) together; the water from the upper part of the aeration tank (2) flows through the connecting pipe Ⅱ (8) through the water distribution pipe (5) , and enter the bottom area of the PNA reaction tank (3) together; the upper circulating liquid of the PNA reaction tank (3) flows through the connecting pipe III (9) and mixes with the sewage of the water inlet pipe (6), and the outlet water is discharged from the outlet pipe (10);

The reaction device is provided with a real-time control system, and the PNA reaction pool (3) is provided with an online DO monitor I (3.1), an online DO monitor II (3.2), an online DO monitor III (3.3), and an online ammonia nitrogen monitor. (3.4), the online nitrate nitrogen monitor (3.5), the data of the online monitor is collected by the control box (11), and is fed back to the gas regulating flowmeter (4.1) according to the control program to realize the adjustment of the aeration rate.
The reaction device according to claim 1, characterized in that, the pool body shape of the PDA reaction tank (1), the aeration tank (2), and the PNA reaction tank (3) is a cube, a cylinder or an elliptical cylinder ; The volume ratio of the PDA reaction tank (1), the aeration tank (2), and the PNA reaction tank (3) is 1:0.1-1:0.5-1.5.
The reaction device according to claim 1, characterized in that, the water distribution pipe (5) is provided with one or more water distribution main pipes and branch pipes, taking the middle plane of the pipe as the reference, and only on the same horizontal plane on one side of the pipe On the top, there are uniform water distribution holes with an oblique angle of 40 to 50 degrees, and the aperture and quantity of the water distribution holes should be set according to the actual situation.
The reaction device according to claim 1, characterized in that, the online DO monitor I (3.1), the online DO monitor II (3.2), and the online DO monitor III (3.3) are respectively located in the PNA reaction pool (3) The lower, middle and upper parts of the side walls are set at 1/6 to 1/4, 1/2 and 3/4 of the longitudinal height of the pool body respectively.
The real-time control method of the novel continuous-flow large-circulation anaerobic ammonium oxidation process reaction is characterized in that:

1) Inoculate sludge: PDA reaction tank (1) inoculate short-range denitrification floc sludge with stable performance and cultivated anaerobic ammonium oxidation floc sludge or carrier biofilm, the volume ratio is 1:1, so that the pool is mixed The sludge concentration is 4-8g/L; the PNA reaction tank (3) is inoculated with short-range nitrification floc sludge with stable performance and cultivated anaerobic ammonium oxidation floc sludge or carrier biofilm, the volume ratio is 1:1, Make the concentration of mixed sludge in the pool 4~8g/L;

2) The sewage in the water inlet pipe (6) is mixed with the backflow liquid in the connecting pipe III (9), and evenly enters the bottom of the PDA reaction pool (1) through the water distribution pipe (5) installed downwards in the direction of the water distribution hole area, the average sludge concentration is 4-8g/L; the short-range denitrifying bacteria use the organic matter in the sewage to reduce the nitrate nitrogen in the liquid returned in the connecting pipe III (9) to nitrite nitrogen, and the newly formed nitrite Nitrogen and ammonia nitrogen in the sewage react under the action of anammox bacteria to generate nitrogen gas, which is discharged into the air;

3) The water from the upper part of the PDA reaction tank (1) flows through the connecting pipe I (7) through the water distribution pipe (5) installed upwards in the direction of the water distribution hole, and enters the bottom area of the aeration tank (2) together, and the aeration volume is 2-20L/(m 2 s);

4) The water from the upper part of the aeration tank (2) flows through the connecting pipe II (8) through the water distribution pipe (5) installed downwards through the water distribution hole, and enters the bottom area of the PNA reaction tank (3) together; the average sludge concentration 4 ~ 8g/L; short-range nitrifying bacteria partially oxidize the pollutant ammonia nitrogen in the sewage to nitrite nitrogen, and the newly formed nitrite nitrogen and the remaining ammonia nitrogen in the sewage react to form nitrogen under the action of anammox bacteria. vent into the air;

5) The circulating liquid in the upper part of the PNA reaction tank (3) flows through the connecting pipe III (9) and mixes with the sewage in the water inlet pipe (6), and evenly enters the bottom area of the PDA reaction tank (1); the water is discharged from the outlet pipe (10) emission.
The real-time control method according to claim 5, characterized in that the circulation ratio of the circulating liquid in the upper part of the PNA reaction tank (3) is 20 to 200 times.
The real-time control method according to claim 5, characterized in that, the flow velocity of the water distribution holes on the water distribution pipe (5) is controlled at 60 to 300m/h; the PDA reaction tank (1) and the PNA reaction tank (3 ) The ascending flow rate of the liquid in the pool is 5-30m/h, and the median diameter of the suspended microorganisms in the pool is 50-800μm.
The real-time control method according to claim 5, characterized in that the dissolved oxygen in the PNA reaction tank (3) is 0.1-0.5 mg/L.
The real-time control method according to claim 5, characterized in that the hydraulic retention time is 0.5-16h.
The real-time control method according to claim 5, characterized in that, the control box (11) collects the data of the on-line monitor, and feeds back to the gas regulating flow meter (4.1) according to the control program to realize the adjustment of the aeration rate;

The specific control program settings are as follows:

a) When any of the on-line DO monitor I (3.1), on-line DO monitor II (3.2), and on-line DO monitor III (3.3) in the PNA reaction pool (3) shows dissolved oxygen > 0.5mg/L, Reduce the operating frequency of the blower (4) or reduce the opening of the gas regulating flowmeter (4.1) until the detected dissolved oxygen is 0.1-0.5mg/L, and restore the regulating device to the initial state;

b) When the concentration of ammonia nitrogen in the effluent of the PNA reaction tank (3) is >4.5mg/L, increase the operating frequency of the blower (4) or increase the opening of the gas regulating flowmeter (4.1) until the ammonia nitrogen concentration is detected <4.5mg /L, restore the adjustment device to the initial state;

c) When the concentration of nitrate nitrogen in the effluent of the PNA reaction tank (3) is > 10mg/L, reduce the operating frequency of the blower (4) or reduce the opening of the gas regulating flowmeter (4.1) until the concentration of nitrate nitrogen is detected < 10mg /L, restore the adjustment device to the initial state.