Continuous flow AOA process technology method and device based on anaerobic starvation and intermittent aeration rapid start short-cut nitrification and anaerobic ammonia oxidation

Abstract

The invention discloses a continuous flow AOA process technical method and device based on anaerobic starvation and intermittent aeration quick start shortcut nitrification and anaerobic ammonia oxidation, and belongs to the field of biological sewage treatment. The device comprises a water inlet tank, a continuous flow AOA reactor and a secondary sedimentation tank. Raw water is firstly pumped into the anaerobic zone through a water inlet pump to store an internal carbon source and then enters the aerobic zone, short-cut nitrification is rapidly started through anaerobic starvation, NO2 <-> accumulation is achieved in the aerobic zone, intermittent aeration is started to jointly maintain short-cut nitrification stability and NO2 <-> accumulation to reach a certain concentration, fluidized anaerobic ammonia oxidation filler is added, and the anaerobic ammonia oxidation filler is fed into the anaerobic zone. According to the characteristic of time difference of intermittent aeration, short-cut nitrification is carried out in an intermittent aeration period, anaerobic ammonia oxidation is carried out in a non-aeration period, one-section short-cut nitrification coupling anaerobic ammonia oxidation is formed in an aerobic zone, and finally, an internal carbon source is stored in an anoxic zone to carry out endogenous denitrification, so that deep denitrification is realized. The carbon source is fully utilized, the aeration energy consumption is reduced, the sludge yield is low, and the cost is saved.

Description

Technical Field

[0001] The present invention relates to a continuous flow AOA process technology method and device based on anaerobic starvation and intermittent aeration to quickly start short-range nitrification and anaerobic ammonium oxidation, which belongs to the application field of sewage biological treatment and resource consumption reduction rationalization. It has the advantages of deep nitrogen and phosphorus removal, reduced energy consumption and sludge production, and is suitable for technical fields such as urban sewage treatment plants. Background Art

[0002] In recent years, with the rapid development of society, the treatment of urban sewage has increasingly pursued high efficiency, greenness and energy saving. The increasingly high emission standards have made it difficult for traditional sewage treatment technologies to meet the needs. Therefore, it is necessary to develop new technologies that are energy-saving and environmentally friendly. As a new denitrification process, short-range nitrification coupled anaerobic ammonia oxidation has the advantages of reducing aeration energy consumption and reducing dosing costs. One-stage coupling shortens the overall reaction time and saves space by rationally utilizing the arrangement sequence in time and space. By combining with autotrophic biological denitrification technology, it achieves the effect of low energy consumption and high efficiency. In the future, it can be further coupled with anaerobic ammonia oxidation in the anoxic stage, which has a large room for improvement.

[0003] With traditional A 2 Compared with the O operation mode, the AOA operation mode fully utilizes and does not require an external carbon source, eliminating the need for digestion liquid reflux, and is simpler and more convenient to operate. Compared with the traditional nitrification / denitrification process, short-range nitrification and denitrification can save 40% of the carbon source and 25% of the aeration energy consumption, and coupled anaerobic ammonium oxidation can save 100% of the carbon source and 60% of the aeration volume. Since there is no natural NO2 in urban sewage, - -N supply, short-term nitrification is required to provide NO2 for anaerobic ammonium oxidation - -N substrate, and an important part of the realization of short-term nitrification is to inhibit ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) to varying degrees according to their characteristics, inhibiting NOB and promoting the growth of AOB. At present, the main means of achieving short-term nitrification are as follows: low dissolved oxygen, high temperature, ammonia nitrogen excess, low sludge age, toxicity inhibition (free nitrite FNA, free ammonia FA), starvation treatment, intermittent aeration, addition of hydroxylamine, real-time control, etc.

[0004] Starvation treatment refers to placing sludge in a water body without organic matter supply for a period of time, so that the microorganisms living in the sludge do not have enough organic matter to absorb and utilize, and then fall into a "starvation" state, and then resume normal organic matter supply. In the early stage of sewage treatment, there will be a short-term accumulation of nitrite, but then the short-term nitrification will be destroyed and cannot be maintained for a long time. Through the strategy of intermittent aeration, according to the difference in the recovery of NOB and AOB activity, NOB activity is selectively inhibited, but there are still problems such as slow start-up and instability in continuous flow. Intermittent aeration can provide two states of aerobic and anoxic for the same cell in time. Nitrification is carried out in the aerobic state, and the anoxic state is conducive to the realization of anaerobic ammonium oxidation, thereby forming a one-stage short-term nitrification coupled anaerobic ammonium oxidation system in the continuous flow aerobic cell.

[0005] Therefore, in the process of treating urban sewage with low temperature, low C / N and large water quality fluctuations, more carbon sources need to be added, the efficiency is low and it is difficult to start quickly, and the effluent is not easy to meet the standards when the water quality fluctuates. A strategy based on starvation treatment combined with intermittent aeration is proposed, and coupled with anaerobic ammonia oxidation to form a one-stage treatment, so as to achieve efficient, stable and deep denitrification of low C / N urban sewage in the AOA continuous flow process. Summary of the invention

[0006] Based on the current problems of insufficient carbon source in continuous flow treatment of low C / N domestic sewage, difficulty in starting short-term nitrification, difficulty in enriching anaerobic ammonia-oxidizing bacteria, and difficulty in achieving deep denitrification, a continuous flow AOA process technology method and device based on anaerobic starvation and intermittent aeration to quickly start short-term nitrification and anaerobic ammonia oxidation was proposed.

[0007] The invention discloses a continuous flow AOA process technology method and device for rapid start-up of short-range nitrification and anaerobic ammonium oxidation based on anaerobic starvation and intermittent aeration, which is characterized by comprising a sewage inlet tank (1), a continuous flow AOA reactor (2), and a secondary sedimentation tank (3).

[0008] The AOA reactor (2) comprises 8 cells, which are divided into 2 anaerobic cells, 3 aerobic cells and 3 anoxic cells according to the water flow direction. The first two cells are fixed cells, and the last six cells are separated by movable plug plates. Adjacent cells are connected by water holes staggered up and down to prevent back-mixing and short-flow. The water inlet tank (1) is connected to the first anaerobic cell (2.1) of the AOA reactor (2) through a water inlet pipe (1.1) and a water inlet pump (1.2), wherein the first cell (2.1) is connected to the first anaerobic cell (2.2). 1) and the second compartment (2.2) are anaerobic zones, the third compartment (2.3), the fourth compartment (2.4) and the fifth compartment (2.5) are aerobic zones, the sixth compartment (2.6), the seventh compartment (2.7) and the eighth compartment (2.8) are anoxic zones, the eighth anoxic compartment (2.8) is connected to the secondary sedimentation tank (3) through an outlet pipe (2.10), and the sludge in the sludge hopper of the secondary sedimentation tank (3) is returned to the secondary sedimentation tank (3) through a sludge return pump (3.1) and a sludge return pipe (3.2). The water flows to the first compartment (2.1) of the anaerobic zone and the first compartment (2.6) of the anoxic zone. The residual sludge of the secondary sedimentation tank is discharged through the residual sludge pipe (3.3), and the effluent of the secondary sedimentation tank is discharged through the outlet pipe (3.4). The third compartment (2.3), the fourth compartment (2.4), and the fifth compartment (2.5) of the aerobic zone are provided with suspended fillers (2.13). Aeration is carried out by an aeration pump (2.11) through an aeration pipe (2.11.1) and an aeration bread aeration plate (2.11.2). .2) intermittent aeration is performed, and each aeration plate is connected to a rotor flowmeter (2.11.3); each cell in the AOA reactor (2) is provided with a stirrer (2.9), wherein the third cell (2.3), the fourth cell (2.4), and the fifth cell (2.5) in the aerobic zone use a small blade stirring paddle (2.12) with a width of 6 cm and a length of 20 cm; each aerobic cell of the AOA reactor (2) is provided with a WTW probe to monitor the dissolved oxygen in the aerobic zone.

[0009] The treatment process of urban domestic sewage in this process is as follows: domestic sewage is first pumped from the water inlet bucket into the anaerobic cell through the water inlet pump. In the anaerobic cell, the available organic matter in the sewage is absorbed into the cells and stored as the internal carbon source PHA through the action of denitrifying polysaccharide bacteria (DPAOs) and denitrifying polyphosphate bacteria (DPAOs). Then the mixed liquid enters the aerobic cell and is treated by short-term starvation to inhibit the growth of nitrite oxidizing bacteria (NOB) and promote the growth of ammonia oxidizing bacteria (AOB). It is maintained by intermittent aeration. During the aeration process, NH4 + Oxidized to NO2 by AOB - Then, during the intermittent aeration process, the anaerobic ammonium oxidizing bacteria (AnAOB) on the filler convert the remaining NH4 + NO2 produced during aeration - The reaction produces N2 and NO3 -The last aerobic chamber discharges sludge and discharges DPAOs for phosphorus removal, and finally enters the anoxic chamber. DGAOs uses its own internal carbon source stored in the anaerobic chamber as its carbon source and the small amount of NO2 remaining in the sewage as its carbon source. - and NO3 - It acts as an electron acceptor, performs endogenous denitrification, completely removes nitrogen, and achieves a deep denitrification effect.

[0010] The present invention provides a continuous flow AOA process technology method and device for rapid startup of short-range nitrification and anaerobic ammonium oxidation based on anaerobic starvation and intermittent aeration, comprising the following steps:

[0011] 1) Anaerobic starvation to start short-term nitrification stage: Inoculation of municipal sewage treatment plant A 2 The residual sludge from the conventional full-process nitrification and denitrification in the secondary sedimentation tank of the O process is the experimental sludge, which is placed in the AOA reactor (2). The sludge concentration of the reactor is maintained between 4000 and 5500 mg / L; after the reactor is filled with domestic sewage, the water inlet and outlet are stopped, so that the hydraulic retention time tends to be infinitely long, the aerobic zone does not need aeration, and the dissolved oxygen is less than 0.10 mg / L. After that, the hydraulic retention time is adjusted to 16 hours to enter the bacterial recovery stage, inhibit and wash NOB; the sludge return adopts a double return mode, and returns to the first compartment of the anaerobic zone (2.1) and the first compartment of the anoxic zone (2.6), respectively, and the return ratio is set to 100%; the total hydraulic retention time is 16 hours, and the sludge age is 15 to 25 days. At this stage, when the nitrite accumulation rate (NAR) of the effluent from the last aerobic cell (2.5), that is, the ratio of nitrite concentration to the sum of nitrite and nitrate nitrogen concentrations, reaches more than 80% and is maintained for more than 7 days, it is considered that the short-term nitrification startup is initially successful and then enters the next stage.

[0012] 2) Short-term nitrification maintenance stage: After the short-term nitrification is quickly started through aerobic starvation, aeration begins in the aerobic zone. The aeration mode is intermittent aeration. The aeration time is 20 minutes, the non-aeration time is 20 minutes, and one cycle is 40 minutes in total. It runs uninterruptedly for 24 hours a day. The total hydraulic retention time of aerobic aeration is 3 hours. The aeration mode adopts three compartments to aerate at the same time and pause at the same time to ensure that the dissolved oxygen gradually increases during the aeration period and is eventually controlled at 1.0-1.5 mg / L. During the non-aeration period, the dissolved oxygen decreases and remains at 0.05-0.10 mg / L. Through AOA operation, the "anaerobic-anoxic-aerobic" mode forms intermittent aeration in space, and through the intermittent aeration of the aerobic O section in AOA, intermittent aeration is performed in time, thus forming a "double" intermittent aeration. During the non-aeration period, the activities of NOB and AOB decreased synchronously. After aeration was restored, the difference in the recovery abilities of AOB and NOB further widened the activity gap between them, maintaining the stability of short-range nitrification. The NAR in the aerobic stage was maintained at more than 90% and lasted for more than 30 days, indicating that short-range nitrification was stably maintained and then entered the next stage.

[0013] 3) One-stage short-cut nitrification coupled anaerobic ammonium oxidation start-up phase: After the short-cut nitrification is stabilized, fluidized blank filler is added to the aerobic zone of the AOA reactor (2), and the filler filling ratio is 25%. During this phase, during the non-aeration period, NO2 - With the remaining NH4 + Anaerobic ammonium oxidation reaction occurs, and anaerobic ammonium oxidizing bacteria are self-enriched on the filler; urban domestic sewage passes through the anaerobic zone of the AOA reactor for internal carbon source storage, and then enters the aerobic zone. According to the different states of aeration and non-aeration in time, short-term nitrification and anaerobic ammonium oxidation reactions are coupled at different time periods, and the state difference in time of the same space is cleverly used for efficient denitrification, promoting the aerobic zone to become a denitrification hot zone; the anoxic zone is for the remaining NO3 - With NO2 - , using the carbon source stored in the anaerobic zone for endogenous denitrification. When the organic matter removal rate of the AOA reactor (2) reaches more than 85%, and the total nitrogen removal rate reaches 90% and above and is maintained for more than 7 days, it is considered that the continuous flow AOA process device based on anaerobic starvation and intermittent aeration to quickly start short-range nitrification and anaerobic ammonium oxidation has been successfully started, and then enters the next stage.

[0014] 4) Stable operation stage: The sludge in the secondary sedimentation tank (3) is returned to the first compartment of the anaerobic zone (2.1) at a return ratio of 100%, and is also returned to the first compartment of the anoxic zone (2.6) at a return ratio of 100% to maintain the average sludge concentration of each section of the AOA reactor (2) at 4000-5500 mg / L, the hydraulic retention time is 16 hours, and the sludge age is 15-25 days; the reactor is operated continuously for a long time, and the water quality of the effluent (3.4) of the secondary sedimentation tank is stable at COD≤40 mg / L, NH4 + -N≤2mg / L, TN≤10mg / L, which meets the national Class A emission standard, that is, the system is considered to have reached a stable state and continue to operate within the standard range. Ultimately, the process achieves a high-quality treatment effect of fully utilizing carbon sources, saving aeration energy consumption, and deep denitrification.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] (1) The AOA operation mode eliminates the need for digestate reflux, and the front anoxic stage is used to store the internal carbon source of DGAOs, making full use of the raw water carbon source, making full use of resources and reducing waste.

[0017] (2) During the continuous flow process, short-term nitrification is quickly initiated through anaerobic starvation and maintained through intermittent aeration, which greatly reduces aeration energy consumption while providing stable NO2 - The source provides a stable substrate source for the continuous operation of anaerobic ammonium oxidation, and the overall short-range nitrification startup time is short and the speed is fast.

[0018] (3) The aerobic cell couples one-stage short-range nitrification and anaerobic ammonium oxidation by adding fluidized fillers. The characteristics of intermittent aeration are cleverly utilized to carry out two different denitrification reaction processes in different time periods, making full use of the reactor space to achieve a more efficient nitrogen removal efficiency.

[0019] (4) The post-anoxic compartment can denitrify the small amount of residual NO3 produced by the anaerobic ammonium oxidation reaction through endogenous denitrification - With NO2 in the reactor environment - It can be removed to achieve deep denitrification effect, and fillers can be added later to further couple anaerobic ammonia oxidation, which has broad development prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the continuous flow AOA process technology method and device for rapid start-up of short-range nitrification and anaerobic ammonium oxidation based on anaerobic starvation and intermittent aeration.

[0021] Figure 1 In the middle: 1 is the water inlet tank, 1.1 is the water inlet pipe, 1.2 is the water inlet pipe, 2 is the AOA reactor, 2.1-2.2 are anaerobic cells, 2.3-2.5 are aerobic cells, 2.6-2.8 are anoxic cells, 2.9 is the agitator, 2.10 is the outlet pipe, 2.11 is the aeration pump, 2.11.1 is the aeration pipe, 2.11.2 is the aeration bread air disk, 2.11.3 is the rotor flowmeter, 3 is the secondary sedimentation tank, 3.1 is the sludge return pump, 3.2 is the sludge return pipe, 3.3 is the residual sludge pipe, and 3.4 is the outlet pipe. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. A continuous flow AOA process technology method and device for rapid start-up of short-range nitrification and anaerobic ammonia oxidation based on anaerobic starvation and intermittent aeration, characterized in that: the whole comprises a sewage inlet tank (1), a continuous flow AOA reactor (2), and a secondary sedimentation tank (3). The AOA reactor (2) comprises 8 cells, which are divided into 2 anaerobic cells, 3 aerobic cells and 3 anoxic cells according to the direction of water flow. The first two cells are fixed cells, and the last six cells are separated by movable plug plates. Adjacent cells are connected by water holes that are staggered up and down to prevent back-mixing and short-flow phenomena; the inlet tank (1) is connected to the first anaerobic cell (2.1) of the AOA reactor (2) through an inlet pipe (1.1) and an inlet pump (1.2), wherein the first cell (2. 1) and the second compartment (2.2) are anaerobic zones, the third compartment (2.3), the fourth compartment (2.4) and the fifth compartment (2.5) are aerobic zones, the sixth compartment (2.6), the seventh compartment (2.7) and the eighth compartment (2.8) are anoxic zones, the eighth anoxic compartment (2.8) is connected to the secondary sedimentation tank (3) through an outlet pipe (2.10), and the sludge in the sludge hopper of the secondary sedimentation tank (3) is returned to the secondary sedimentation tank (3) through a sludge return pump (3.1) and a sludge return pipe (3.2). The water flows to the first compartment (2.1) of the anaerobic zone and the first compartment (2.6) of the anoxic zone. The residual sludge of the secondary sedimentation tank is discharged through the residual sludge pipe (3.3), and the effluent of the secondary sedimentation tank is discharged through the outlet pipe (3.4). The third compartment (2.3), the fourth compartment (2.4), and the fifth compartment (2.5) of the aerobic zone are provided with suspended fillers (2.13). Aeration is carried out by an aeration pump (2.11) through an aeration pipe (2.11.1) and an aeration bread aeration plate (2.11.2). .2) intermittent aeration is performed, and each aeration plate is connected to a rotor flowmeter (2.11.3); each cell in the AOA reactor (2) is provided with a stirrer (2.9), wherein the third cell (2.3), the fourth cell (2.4), and the fifth cell (2.5) in the aerobic zone use a small blade stirring paddle (2.12) with a width of 6 cm and a length of 20 cm; each aerobic cell of the AOA reactor (2) is provided with a WTW probe to monitor the dissolved oxygen in the aerobic zone.

[0023] The septic tank wastewater from a university family quarters in Beijing was used as the treatment object. The specific water quality during operation was as follows: COD was 180-280 mg / L, NH4 + -N is 70-80mg / L, NO3 - -N≤2mg / L, NO2 - -N≤0.5mg / L. Test system such as Figure 1 As shown, intermittent aeration coupled one-stage short-range nitrification / anaerobic ammonium oxidation improved AOA achieves low C / N urban sewage deep denitrification. The effective volume of the reactor is 46.1L, which is evenly divided into 8 grids, and the effective volume of the secondary sedimentation tank is 20.4L, both of which are made of acrylic sheets.

[0024] The specific operations are as follows:

[0025] 1) Anaerobic starvation to start short-term nitrification stage: Inoculation of municipal sewage treatment plant A 2 The residual sludge from the conventional full-process nitrification and denitrification in the secondary sedimentation tank of the O process is the experimental sludge, which is placed in the AOA reactor (2). The sludge concentration of the reactor is maintained between 4000 and 5500 mg / L; after the reactor is filled with domestic sewage, the water inlet and outlet are stopped, so that the hydraulic retention time tends to be infinitely long, the aerobic zone does not need aeration, and the dissolved oxygen is less than 0.10 mg / L. After that, the hydraulic retention time is adjusted to 16 hours to enter the bacterial recovery stage, inhibit and wash NOB; the sludge return adopts a double return mode, and returns to the first compartment of the anaerobic zone (2.1) and the first compartment of the anoxic zone (2.6), respectively, and the return ratio is set to 100%; the total hydraulic retention time is 16 hours, and the sludge age is 15 to 25 days. At this stage, when the nitrite accumulation rate (NAR) of the effluent from the last aerobic cell (2.5), that is, the ratio of nitrite concentration to the sum of nitrite and nitrate nitrogen concentrations, reaches more than 80% and is maintained for more than 7 days, it is considered that the short-term nitrification startup is initially successful and then enters the next stage.

[0026] 2) Short-term nitrification maintenance stage: After the short-term nitrification is quickly started through aerobic starvation, aeration begins in the aerobic zone. The aeration mode is intermittent aeration. The aeration time is 20 minutes, the non-aeration time is 20 minutes, and one cycle is 40 minutes in total. It runs uninterruptedly for 24 hours a day. The total hydraulic retention time of aerobic aeration is 3 hours. The aeration mode adopts three compartments to aerate at the same time and pause at the same time to ensure that the dissolved oxygen gradually increases during the aeration period and is eventually controlled at 1.0-1.5 mg / L. During the non-aeration period, the dissolved oxygen decreases and remains at 0.05-0.10 mg / L. Through AOA operation, the "anaerobic-anoxic-aerobic" mode forms intermittent aeration in space, and through the intermittent aeration of the aerobic O section in AOA, intermittent aeration is performed in time, thus forming a "double" intermittent aeration. During the non-aeration period, the activities of NOB and AOB decreased synchronously. After aeration was restored, the difference in the recovery abilities of AOB and NOB further widened the activity gap between them, maintaining the stability of short-range nitrification. The NAR in the aerobic stage was maintained at more than 90% and lasted for more than 30 days, indicating that short-range nitrification was stably maintained and then entered the next stage.

[0027] 3) One-stage short-cut nitrification coupled anaerobic ammonium oxidation start-up phase: After the short-cut nitrification is stabilized, fluidized blank filler is added to the aerobic zone of the AOA reactor (2), and the filler filling ratio is 25%. During this phase, during the non-aeration period, NO2 - With the remaining NH4 +Anaerobic ammonium oxidation reaction occurs, and anaerobic ammonium oxidizing bacteria are self-enriched on the filler; urban domestic sewage passes through the anaerobic zone of the AOA reactor for internal carbon source storage, and then enters the aerobic zone. According to the different states of aeration and non-aeration in time, short-term nitrification and anaerobic ammonium oxidation reactions are coupled at different time periods, and the state difference in time of the same space is cleverly used for efficient denitrification, promoting the aerobic zone to become a denitrification hot zone; the anoxic zone is for the remaining NO3 - With NO2 - , using the carbon source stored in the anaerobic zone for endogenous denitrification. When the organic matter removal rate of the AOA reactor (2) reaches more than 85%, and the total nitrogen removal rate reaches 90% and above and is maintained for more than 7 days, it is considered that the continuous flow AOA process device based on anaerobic starvation and intermittent aeration to quickly start short-range nitrification and anaerobic ammonium oxidation has been successfully started, and then enters the next stage.

[0028] 4) Stable operation stage: The sludge in the secondary sedimentation tank (3) is returned to the first compartment of the anaerobic zone (2.1) at a return ratio of 100%, and is also returned to the first compartment of the anoxic zone (2.6) at a return ratio of 100% to maintain the average sludge concentration of each section of the AOA reactor (2) at 4000-5500 mg / L, the hydraulic retention time is 16 hours, and the sludge age is 15-25 days; the reactor is operated continuously for a long time, and the water quality of the effluent (3.4) of the secondary sedimentation tank is stable at COD≤40 mg / L, NH4 + -N≤2mg / L, TN≤10mg / L, which meets the national Class A emission standard, that is, the system is considered to have reached a stable state and continue to operate within the standard range. Ultimately, the process achieves a high-quality treatment effect of fully utilizing carbon sources, saving aeration energy consumption, and deep denitrification.

[0029] The experimental results show that after the reactor is in stable operation, the effluent COD of low C / N domestic sewage in the city is 30-40 mg / L and NH4 + -N is lower than 2mg / L, NO3 - -N is lower than 5mg / L, NO2 - -N is lower than 0.5mg / L, total nitrogen is lower than 10mg / L, effluent COD, NH4 + -N, TN and other indicators have all reached the national Class A sewage treatment emission standards.

[0030] The above is a specific implementation case of this experiment, which is convenient for technicians in this technical field to better understand and apply the present invention, but the implementation of the present invention is not limited to this. Therefore, simple improvements made to the present invention by technicians in this technical field are within the scope of protection of the present invention.

Claims

1. A device for the continuous flow AOA process of rapid start-up of short-range nitrification and anaerobic ammonium oxidation based on anaerobic starvation and intermittent aeration, characterized by: The whole system comprises a sewage inlet tank (1), a continuous flow AOA reactor (2), and a secondary sedimentation tank (3); the AOA reactor (2) comprises 8 cells, which are divided into 2 anaerobic cells, 3 aerobic cells, and 3 anoxic cells according to the water flow direction; the first two cells are fixed cells, and the last six cells are separated by movable plug plates; adjacent cells are connected by upper and lower staggered water holes to prevent back mixing and short flow; the inlet tank (1) is connected to the AOA reactor through an inlet pipe (1.1) and an inlet pump (1.2). The first anaerobic cell (2.1) of (2) is connected to the first anaerobic cell (2.1), wherein the first cell (2.1) and the second cell (2.2) are anaerobic zones, the third cell (2.3), the fourth cell (2.4) and the fifth cell (2.5) are aerobic zones, the sixth cell (2.6), the seventh cell (2.7) and the eighth cell (2.8) are anoxic zones, and the eighth anoxic cell (2.8) is connected to the secondary sedimentation tank (3) through the outlet pipe (2.10), and the sludge in the sludge hopper of the secondary sedimentation tank (3) is discharged through the sludge return pump (3 .1) and the sludge return pipe (3.2) are respectively returned to the first compartment (2.1) of the anaerobic zone and the first compartment (2.6) of the anoxic zone, the residual sludge of the secondary sedimentation tank is discharged through the residual sludge pipe (3.3), and the effluent of the secondary sedimentation tank is discharged through the outlet pipe (3.4); the third compartment (2.3), the fourth compartment (2.4), and the fifth compartment (2.5) of the aerobic zone are filled with suspended fillers (2.13), and aeration is carried out by an aeration pump (2.11) through an aeration pipe (2.11.1) and an aeration surface. The aeration disk (2.11.2) is used for intermittent aeration, and each aeration disk is connected to a rotor flowmeter (2.11.3); each cell in the AOA reactor (2) is provided with a stirrer (2.9), wherein the third cell (2.3), the fourth cell (2.4), and the fifth cell (2.5) in the aerobic zone use a small blade stirring paddle (2.12) with a width of 6 cm and a length of 20 cm; each aerobic cell in the AOA reactor (2) is provided with a WTW probe to monitor the dissolved oxygen in the aerobic zone.

2. A method for applying the device as claimed in claim 1, characterized in that: The following steps are involved: 1) Anaerobic starvation to start short-term nitrification stage: Inoculation of municipal sewage treatment plant A 2 The residual sludge from the conventional full-process nitrification and denitrification in the secondary sedimentation tank of the O process is used as the experimental sludge and is placed in the AOA reactor (2); the sludge concentration of the reactor is maintained between 4000 and 5500 mg / L; after the reactor is filled with domestic sewage, the water inlet and outlet are stopped, and the dissolved oxygen is less than 0.10 mg / L, and then the bacterial recovery stage is entered to inhibit and wash the nitrifying bacteria; the sludge return adopts a double return mode, and returns to the first cell (2.1) of the anaerobic zone and the first cell (2.6) of the anoxic zone, and the return ratio of the two is 100%; at this stage, the nitrite accumulation rate (NAR) of the effluent of the last cell (2.5) of the aerobic cell, that is, the ratio of the nitrite concentration to the sum of the nitrite and nitrate nitrogen concentrations, reaches more than 80%, and the maintenance time reaches more than 7 days, which means that the short-term nitrification startup is initially successful, and then enters the next stage; 2) Short-term nitrification maintenance stage: After the short-term nitrification is quickly started by aerobic starvation, aeration begins in the aerobic zone. The aeration mode is intermittent aeration. The aeration time is 20 minutes, the non-aeration time is 20 minutes, and one cycle is 40 minutes. It runs 24 hours a day without interruption. The total hydraulic retention time of aerobic aeration is 3 hours. The aeration mode adopts three compartments to aerate at the same time and pause at the same time to ensure that the dissolved oxygen gradually increases during the aeration period and is finally controlled at 1.0-1.5 mg / L. During the non-aeration period, the dissolved oxygen decreases and remains at 0.05-0.10 mg / L. The stability of short-term nitrification is maintained by the operation of intermittent aeration in AOA; the NAR of the aerobic section is maintained above 90% and the maintenance time reaches more than 30 days, which means that the short-term nitrification is stably maintained and then enters the next stage; 3) One-stage short-cut nitrification coupled anaerobic ammonium oxidation start-up phase: After the short-cut nitrification is stably maintained, a fluidized blank filler is added to the aerobic zone of the AOA reactor (2), and the filler filling ratio is 25%; during this phase, the anaerobic zone stores the internal carbon source; the aerobic zone maintains an aeration-stop ratio of 20min:20min, and during the aeration period, the short-cut nitrification process is carried out to provide the substrate NO2 for anaerobic ammonium oxidation. - ; During the non-aeration period, NO2 - With the remaining NH4 + Anaerobic ammonium oxidation reaction occurs, and anaerobic ammonium oxidizing bacteria are self-enriched on the filler; the anoxic zone is for the remaining NO3 after the reaction in the aerobic zone - With NO2 - , using the internal carbon source for denitrification; when the organic matter removal rate of the AOA reactor (2) reaches more than 85%, and the total nitrogen removal rate reaches 90% and above and is maintained for more than 7 days, it is considered that the continuous flow AOA process device based on anaerobic starvation and intermittent aeration rapid start-up of short-range nitrification and anaerobic ammonium oxidation is successfully started, and then enters the next stage; 4) Stable operation stage: The reactor operates continuously, and the influent is urban domestic sewage, COD is 180-280 mg / L, NH4 + -N is 70-80mg / L, NO3 - -N≤2mg / L, NO2 - -N≤0.5mg / L, the sewage enters the anaerobic zone to store the internal carbon source, and the nitrogen is removed by intermittent aeration in the aerobic zone, with aeration for 20min and pause for 20min, and a cycle of 40min in total; the dissolved oxygen is controlled at 1.0-1.5mg / L during the aeration period, and the dissolved oxygen is controlled below 0.1mg / L during the non-aeration period; it enters the anoxic zone for denitrification, and the sewage stays in the reactor for 16h, and finally enters the secondary sedimentation tank and is discharged through the triangular weir; the sludge in the secondary sedimentation tank is 100% returned to the first grid of the anaerobic zone and the first grid of the anoxic zone respectively, to ensure that the sludge concentration of the reactor is maintained at 4000-5500mg / L.

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