Method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidizing sludge

Abstract

The present invention discloses a method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidation sludge. The method includes inoculating traditional activated sludge (naturally containing low-abundance anaerobic ammonium oxidizing bacteria) from a local sewage treatment plant during the denitrification startup phase; during the operation phase, installing a PLC automatic controller in the denitrification filter: online monitoring sensors for ammonia nitrogen, nitrite nitrogen, and nitrate nitrogen. By collecting the inlet and outlet water data of the denitrification filter online, the PLC control system automatically adjusts the proportion of raw water introduced and the amount of carbon source added to ensure that short-cut denitrification occurs in the denitrification filter to produce nitrite nitrogen, thereby ensuring sufficient substrate for anaerobic ammonium oxidation, so as to achieve in-situ enrichment of anaerobic ammonium oxidation, gradually transitioning the traditional denitrification filter into a short-cut denitrification anaerobic ammonium oxidation filter, and at the same time reducing the amount of carbon source artificially added to the denitrification filter, thereby reducing the cost of upgrading the denitrification filter to a short-cut denitrification anaerobic ammonium oxidation filter.

Description

Technical Field

[0001] The present invention relates to a method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidizing sludge, belonging to the field of sewage treatment and applicable to secondary effluent from sewage treatment plants containing nitrates. Background Art

[0002] Denitrifying biofilters are widely used to remove excess nitrate from the secondary effluent of sewage treatment plants. In these biofilters, organic matter acts as an electron donor, reducing excess nitrate in the secondary effluent to nitrogen gas. However, the effluent from the secondary clarifier contains limited biodegradable organic matter, necessitating the introduction of additional organic matter into the DNBF. This results in higher costs for treating excess nitrate in the secondary effluent of sewage treatment plants, necessitating innovation in more energy-efficient technologies.

[0003] Short-cut denitrification / anaerobic ammonium oxidation is a new low-carbon and energy-saving denitrification technology. Short-cut denitrification takes advantage of the difference in activity between nitrate reductase and nitrite reductase. The reduction rate of nitrate is higher than that of nitrite. By controlling COD / NO3 - , converting some nitrate into nitrite, which can lead to nitrite accumulation. ANAMMOX bacteria then utilize ammonia nitrogen and nitrite to achieve autotrophic nitrogen removal, without the need for an organic carbon source. Studies have successfully combined short-range denitrification with ANAMMOX to achieve low-carbon, energy-efficient nitrogen removal in biofilters. Compared to traditional denitrifying biofilters, this approach can save significant amounts of artificially added carbon sources.

[0004] However, in practice, if a short-cut denitrification / anammox biofilter is used to replace a denitrifying biofilter, two major challenges arise: 1) How can a wastewater treatment plant maintain the capacity to treat the effluent from the secondary sedimentation tank while upgrading the denitrifying biofilter? 2) Directly inoculating the denitrifying biofilter with anammox sludge requires the purchase of large quantities of mature anammox sludge, which will incur significant costs for the filter upgrade and also present difficulties in transporting the large amount of sludge.

[0005] Fortunately, anaerobic ammonium oxidizing bacteria are widely distributed in the environment, and low abundance of anaerobic ammonium oxidizing bacteria have also been detected in sewage treatment plants. It is of great significance if appropriate methods can be adopted to directly enrich anaerobic ammonium oxidizing bacteria in local biological filters to promote the upgrading and transformation of traditional denitrification filters into short-range denitrification / anaerobic ammonium oxidizing filters. Summary of the Invention

[0006] Based on the above key issues, the present invention has developed a method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidizing sludge in order to directly enrich anaerobic ammonium oxidizing bacteria in a denitrification filter.

[0007] The technical solution of the present invention is achieved as follows:

[0008] A method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidizing sludge. The device used is provided with a municipal sewage raw water tank (1), an AO biochemical tank (2), a secondary sedimentation tank (3), a carbon source addition tank (4), a mixing tank (5), a denitrification filter (6), a backwash wastewater tank (7), a clear water tank (8), and a PLC automatic control system (9). The method comprises the following steps:

[0009] S1: Inoculate the activated sludge from the traditional sewage treatment plant into the denitrification biofilter to make the activated sludge form a membrane on the filter media; record the NO3 - -N concentration is a, NH4 + -N concentration is b, flow rate is Q1; raw sewage NH4 + -N concentration is c, COD concentration is d, drainage flow is Q2; COD concentration in carbon source addition pool is e, flow is Q3; denitrification filter influent NH4 + -N concentration is f, initially f is set to 3 mg / L; denitrification filter effluent NH4 + -N concentration is g, effluent NO2 - -N concentration is h, effluent NO3 - -N concentration is i; Q is the total flow of raw sewage;

[0010] S2: Use the sensor to collect NO3 in the effluent of the secondary sedimentation tank online every 5 minutes - -N concentration a and NH4 + -N concentration b, raw sewage NH4 + -N concentration c, COD concentration d, and COD concentration e in the carbon source addition pool can be measured directly, and the sensor is used to collect NH4 + -N concentration f and NH4 in the effluent + -N concentration g, NO2 - -N concentration h, NO3 - -N concentration i, using online flow monitor to collect the secondary sedimentation tank effluent flow Q1, raw sewage drainage flow Q2, and carbon source addition flow Q3;

[0011] The various flow rates of the entire process are calculated as follows:

[0012] Q2=(b+cf) / c*Q

[0013] Q1=Q-Q2

[0014] Q3=(4a*Q1-f*Qd*Q2) / e

[0015] Further explanation: an ammonia nitrogen concentration sensor (1.1) and a COD concentration sensor (1.2) are installed in the raw sewage tank (1); a nitrate nitrogen concentration sensor (3.2) is installed in the secondary sedimentation tank (3); a COD concentration sensor (4.1) is installed in the carbon source addition tank (4); an ammonia nitrogen concentration sensor (6.2) is installed at the water inlet of the denitrification filter, and an ammonia nitrogen concentration sensor (6.4), a nitrite nitrogen sensor (6.5) and a nitrate nitrogen sensor (6.6) are installed at the water outlet.

[0016] Further description, the raw sewage tank (1) is connected to the AO biochemical tank (2); the raw sewage tank is further connected to the mixing tank (5) through a drainage pump (5.1); the drainage pump is connected to the PLC control system (9); the AO biochemical tank outlet pipe is connected to the secondary sedimentation tank (3); the secondary sedimentation tank is connected to the AO biochemical tank through a sludge return pump (3.1); the secondary sedimentation tank is connected to the mixing tank (5) through the secondary sedimentation tank outlet pipe; the carbon source addition tank is connected to the mixing tank (5) through a carbon source addition pump (5.2), and the mixing tank is provided with a stirrer (5.3); the mixing tank outlet pipe is connected to the denitrification filter inlet pump (6.1); the denitrification filter (6) is filled with ceramsite filter material (6.3) and traditional activated sludge.

[0017] Further explanation: flow monitors (5.5), (5.6) and (5.4) are respectively provided at the drainage pump (5.1), the carbon source addition pipe and the outlet pipe of the secondary sedimentation tank. The sensors or flow detectors are all connected to the PLC control system. The denitrification filter (6) is provided with an outlet pipe, which is simultaneously connected to the backwash wastewater tank (7) and the clear water tank (8). The backwash wastewater tank (7) and the clear water tank (8) are both provided with outlet pipes.

[0018] It is further explained that all data measured by any sensor or detector are transmitted to the PLC automatic control system for calculation.

[0019] It is further explained that at the beginning of the entire process, Q2 is set to 0, the COD concentration e in the carbon source addition pool is set to 150 g / L, and f is set to 3 mg / L.

[0020] To further explain, the entire process includes the following control schemes after it is started:

[0021] Denitrification filter inlet ammonia nitrogen regulation method: If the denitrification filter outlet NH4 + If the -N concentration g is less than 1 mg / L for two consecutive days, the PLC automatic control system will transmit the adjustment signal to the drainage pump to increase the pump speed by 1%-3% until f=f+2; otherwise, the control will be stopped and f will remain unchanged;

[0022] Denitrification filter effluent nitrite nitrogen regulation method: If the denitrification filter effluent NO2 -- If the N concentration h is less than 2 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump to reduce the pumping speed of the carbon source dosing pump by 1%-3%; if h>4 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump to increase the pumping speed of the carbon source dosing pump by 1%-3%; otherwise, the control will be stopped to maintain h unchanged;

[0023] Method for regulating nitrate nitrogen in denitrification filter effluent: If denitrification filter effluent NO3 - If the -N concentration i is greater than 5 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump to increase the pump speed of the carbon source dosing pump by 1%-3%; otherwise, the regulation will be stopped and i will remain unchanged.

[0024] The technical principles of the present invention are as follows:

[0025] An ammonia nitrogen concentration sensor and a COD concentration sensor are installed in the raw sewage tank; a nitrate nitrogen concentration sensor is installed in the secondary sedimentation tank; a COD concentration sensor is installed in the carbon source dosing tank; an ammonia nitrogen concentration sensor is installed at the water inlet of the denitrification filter, and an ammonia nitrogen concentration sensor, a nitrite nitrogen concentration sensor, and a nitrate nitrogen concentration sensor are installed at the water outlet. Flow monitors are installed in the secondary sedimentation tank outlet pipe, drainage pipe, and carbon source dosing pipe. All of the above sensors and flow monitors are connected to the PLC automatic control system, which is also connected to the raw sewage drainage pump and the carbon source dosing pump. When the entire system starts operating, it automatically collects concentration data from each set sensor and flow data from the flow monitor, inputs them into the PLC automatic control system, calculates them using a set algorithm, and then outputs feedback signals to the drainage pump and carbon source dosing pump according to the set control rules to regulate the water quality of the denitrification filter inlet, ensuring that the denitrification filter provides ammonia nitrogen and nitrite nitrogen as substrates to the anaerobic ammonia-oxidizing bacteria while ensuring that the effluent meets the standards.

[0026] Compared with directly inoculating short-cut denitrification sludge and anaerobic ammonium oxidation sludge to transform a traditional nitrification filter into a short-cut denitrification anaerobic ammonium oxidation filter, the present invention has the following advantages:

[0027] 1) No need to inoculate short-range denitrification sludge and anaerobic ammonium oxidation sludge, and the cost of filter conversion is greatly reduced;

[0028] 2) By continuously regulating the influent conditions, the anaerobic ammonium oxidizing bacteria in the denitrification filter are provided with substrates of ammonia nitrogen and nitrite nitrogen, which slowly enrich the anaerobic ammonium oxidizing bacteria in the local denitrification filter. The entire operation process will not affect the normal operation of the sewage treatment plant, and the effluent is stable and meets the standards;

[0029] 3) Anaerobic ammonium-oxidizing bacteria use ammonia nitrogen to replace part of organic matter to reduce nitrite nitrogen, which can reduce the addition of carbon source compared to traditional denitrification filters;

[0030] 4) Part of the raw water was introduced into the mixing tank, thus reducing the aeration volume in the AO biochemical tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The present invention is a schematic structural diagram of a complete set of devices used in a method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidizing sludge.

[0032] Figure 2 This is the ammonia nitrogen concentration control diagram for the denitrification filter inlet;

[0033] Figure 3 This is the nitrite nitrogen concentration control diagram of the denitrification filter effluent;

[0034] Figure 4 This is the nitrate nitrogen concentration control diagram for the denitrification filter effluent.

[0035] Figure 1 Among them, 1 is the raw sewage tank, 2 is the AO biochemical pool, 3 is the secondary sedimentation tank, 4 is the carbon source dosing pool, 5 is the mixing pool, 6 is the denitrification filter, 7 is the backwash wastewater pool, 8 is the clean water pool, 9 is the PLC automatic control system; 1.1 is the ammonia nitrogen concentration sensor, 1.2 is the COD concentration sensor; 3.1 is the sludge return valve, 3.2 is the nitrate nitrogen concentration sensor; 4.1 is the COD concentration sensor; 5.1 is the drainage pump, 5.2 is the carbon source dosing pump, 5 .3 is the agitator, 5.4 is the secondary sedimentation tank effluent flow monitor, 5.5 is the drainage flow monitor, 5.6 is the carbon source addition flow monitor; 6.1 is the denitrification filter inlet pump, 6.2 is the ammonia nitrogen concentration sensor, 6.3 is the denitrification filter biofilm filter material, 6.4 is the ammonia nitrogen concentration sensor, 6.5 is the nitrite nitrogen concentration sensor, 6.6 is the nitrate nitrogen concentration sensor; 7 is the backwash wastewater tank; 8 is the clear water tank; 9 is the PLC automatic control system. DETAILED DESCRIPTION

[0036] In order to better understand the technical content of the present invention, specific embodiments are provided below, and the present invention is further described in conjunction with the accompanying drawings.

[0037] Example 1 Method for Enriching Anaerobic Ammonium Oxidizing Bacteria in a Denitrification Filter Without Inoculation of Short-cut Denitrification Sludge and Anaerobic Ammonium Oxidation Sludge

[0038] The raw sewage is denitrified from the raw sewage tank (1) through the AO biochemical tank (2) and then enters the secondary sedimentation tank (3). The mud and water in the secondary sedimentation tank are separated, and part of the settled sludge is discharged as residual sludge. The supernatant effluent from the secondary sedimentation tank enters the mixing tank (5), and part of the sludge is returned to the AO biochemical tank through the sludge return pump (3.1); in addition, the raw sewage is introduced into the mixing tank through the drainage pump (5.1); the carbon source dosing tank (4) enters the mixing tank through the carbon source dosing pump (5.2); the mixing tank is uniformly mixed by stirring; the effluent from the mixing tank enters the denitrification filter (6) through the denitrification filter inlet pump (6.1); the denitrification filter is filled with traditional activated sludge biofilm fillers, and the effluent from the denitrification filter is sent to the backwash wastewater tank (7) and the clear water tank (8).

[0039] S1: Record the NO3 in the effluent from the secondary sedimentation tank - -N concentration is a, NH4 + -N concentration is b, flow rate is Q1; raw sewage NH4 + -N concentration is c, COD concentration is d, drainage flow is Q2; COD concentration in carbon source addition pool is e, flow rate is Q3; denitrification filter influent NH4 + -N concentration is f, initially f is set to 3 mg / L; denitrification filter effluent NH4 + -N concentration is g, effluent NO2 - -N concentration is h, effluent NO3 - -N concentration is i; Q is the total flow of raw sewage;

[0040] S2: Use the sensor to collect NO3 in the effluent of the secondary sedimentation tank online every 5 minutes - -N concentration a and NH4 + -N concentration b, raw sewage NH4 + -N concentration c, COD concentration d, and COD concentration e in the carbon source addition pool can be measured directly, and the sensor is used to collect NH4 + -N concentration f and NH4 in the effluent + -N concentration g, NO2 - -N concentration h, NO3 - -N concentration i, the secondary sedimentation tank effluent flow Q1, raw sewage drainage flow Q2, and carbon source addition flow Q3 are collected using an online flow monitor, and all data are transmitted to the PLC automatic control system for calculation.

[0041] The initial flow rates in the entire system are calculated as follows:

[0042] Q2=(b+cf) / c*Q

[0043] Q1=Q-Q2

[0044] Q3=(4a*Q1-f*Qd*Q2) / e

[0045] At the start of the entire system, Q2 is set to 0, the COD concentration e in the carbon source dosing pool is set to 150g / L, and f is set to 3mg / L. The control plan after the system is started is as follows:

[0046] Denitrification filter inlet ammonia nitrogen regulation method: If the denitrification filter outlet NH4 + If the N concentration g is less than 1 mg / L for two consecutive days, the PLC automatic control system will transmit an adjustment signal to the drainage pump to increase the pump speed by 1% until f = f + 2; otherwise, the control will be stopped and f will remain unchanged.

[0047] Denitrification filter effluent nitrite nitrogen regulation method: If the denitrification filter effluent NO2 - - If the N concentration h is less than 2 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump to reduce the pump speed of the carbon source dosing pump by 1%. If h>4 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump to increase the pump speed of the carbon source dosing pump by 1%. Otherwise, it will stop regulating and maintain h unchanged.

[0048] Method for regulating nitrate nitrogen in denitrification filter effluent: If denitrification filter effluent NO3 - -N concentration i is greater than 5 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump to increase the pump speed of the carbon source dosing pump by 1%, otherwise it will stop regulating and maintain i unchanged.

[0049] The test results show that: the system treats urban domestic sewage, and enriches anaerobic ammonium oxidizing bacteria in the denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidation sludge. Under the premise that the effluent of the denitrification filter meets the standards, anaerobic ammonium oxidation denitrification can be observed in the denitrification filter, and the denitrification capacity accounts for 5%-20% of the total nitrogen removal capacity of the filter. The effluent NO3 - -N concentration is 0.7-3.4mg / L, effluent NH4 + -N concentration is 1.0-3.5mg / L, effluent NO2 - -N concentration is 3.4-7.4 mg / L. However, no anaerobic ammonium oxidation denitrification effect was observed in the denitrification filter operated in the traditional way to treat urban domestic sewage.

[0050] Example 2 Method for Enriching Anaerobic Ammonium Oxidizing Bacteria in a Denitrification Filter Without Inoculation of Short-cut Denitrification Sludge and Anaerobic Ammonium Oxidation Sludge

[0051] S1: Record the NO3 in the effluent from the secondary sedimentation tank - -N concentration is a, NH4 +-N concentration is b, flow rate is Q1; raw sewage NH4 + -N concentration is c, COD concentration is d, drainage flow is Q2; COD concentration in carbon source addition pool is e, flow rate is Q3; denitrification filter influent NH4 + -N concentration is f, initially f is set to 3 mg / L; denitrification filter effluent NH4 + -N concentration is g, effluent NO2 - -N concentration is h, effluent NO3 - -N concentration is i; Q is the total flow of raw sewage;

[0052] S2: Use the sensor to collect NO3 in the effluent of the secondary sedimentation tank online every 5 minutes - -N concentration a and NH4 + -N concentration b, raw sewage NH4 + -N concentration c, COD concentration d, and COD concentration e in the carbon source addition pool can be measured directly, and the sensor is used to collect NH4 + -N concentration f and NH4 in the effluent + -N concentration g, NO2 - -N concentration h, NO3 - -N concentration i, the secondary sedimentation tank effluent flow Q1, raw sewage drainage flow Q2, and carbon source addition flow Q3 are collected using an online flow monitor, and all data are transmitted to the PLC automatic control system for calculation.

[0053] The initial flow rates in the entire system are calculated as follows:

[0054] Q2=(b+cf) / c*Q

[0055] Q1=Q-Q2

[0056] Q3=(4a*Q1-f*Qd*Q2) / e

[0057] At the start of the entire system, Q2 is set to 0, the COD concentration e in the carbon source dosing pool is set to 150g / L, and f is set to 3mg / L. The control plan after the system is started is as follows:

[0058] Denitrification filter inlet ammonia nitrogen regulation method: If the denitrification filter outlet NH4 + If the N concentration g is less than 1 mg / L for two consecutive days, the PLC automatic control system will transmit an adjustment signal to the drainage pump to increase the pump speed by 1% until f = f + 2; otherwise, the control will be stopped and f will remain unchanged.

[0059] Denitrification filter effluent nitrite nitrogen regulation method: If the denitrification filter effluent NO2 -- If the N concentration h is less than 2 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump to reduce the pump speed of the carbon source dosing pump by 3%. If h>4 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump to increase the pump speed of the carbon source dosing pump by 1%. Otherwise, the control will be stopped to maintain h unchanged.

[0060] Method for regulating nitrate nitrogen in denitrification filter effluent: If denitrification filter effluent NO3 - - If the N concentration i is greater than 5 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump to increase the pump speed of the carbon source dosing pump by 3%, otherwise it will stop regulating and maintain i unchanged.

[0061] The test results show that: the system treats urban domestic sewage, and enriches anaerobic ammonium oxidizing bacteria in the denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidation sludge. Under the premise that the effluent of the denitrification filter meets the standards, anaerobic ammonium oxidation denitrification can be observed in the denitrification filter, and the denitrification capacity accounts for 5%-18% of the total nitrogen removal capacity of the filter. The effluent NO3 - -N concentration is 0.8-3.0mg / L, effluent NH4 + -N concentration is 1.0-3.2mg / L, effluent NO2 - -N concentration is 3.4-6.6 mg / L. However, no anaerobic ammonium oxidation denitrification effect was observed in the denitrification filter operated in the traditional way to treat urban domestic sewage.

[0062] The above descriptions are only some embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-range denitrification sludge and anaerobic ammonium oxidizing sludge. The device used is provided with a raw sewage tank (1), an AO biochemical tank (2), a secondary sedimentation tank (3), a carbon source dosing tank (4), a mixing tank (5), a denitrification filter (6), a backwash wastewater tank (7), a clear water tank (8) and a PLC automatic control system (9). The raw sewage tank (1) is provided with an ammonia nitrogen concentration sensor (1.1) and a COD concentration sensor (1.2); the secondary sedimentation tank (3) is provided with a nitrate nitrogen concentration sensor (3.2); the carbon source dosing tank (4) is provided with a COD concentration sensor (4.1); an ammonia nitrogen concentration sensor (6.2) is provided at the water inlet of the denitrification filter, and an ammonia nitrogen concentration sensor (6.4) and a nitrite nitrogen sensor (6.5) are provided at the water outlet. and a nitrate nitrogen sensor (6.6); the raw sewage tank (1) is connected to the AO biochemical tank (2); the raw sewage tank (1) is further connected to the mixing tank (5) through a drainage pump (5.1); the drainage pump is connected to a PLC control system (9); the outlet pipe of the AO biochemical tank (2) is connected to the secondary sedimentation tank (3); the secondary sedimentation tank (3) is connected to the AO biochemical tank (2) through a sludge return pump (3.1); the secondary sedimentation tank (3) is connected to the mixing tank (5) through the outlet pipe of the secondary sedimentation tank; the carbon source dosing tank (4) is connected to the mixing tank (5) through a carbon source dosing pump (5.2), and the mixing tank (5) is provided with a stirrer (5.3); the outlet pipe of the mixing tank is connected to the denitrification filter inlet pump (6.1); the denitrification filter (6) is filled with ceramsite filter material (6.3) and traditional activated sludge; characterized in that, The following processes are included: S1: Inoculate the activated sludge from the traditional sewage treatment plant into the denitrification biofilter to make the activated sludge form a membrane on the filter media; record the NO3 - -N concentration is a, NH4 + -N concentration is b, flow rate is Q1; raw sewage NH4 + -N concentration is c, COD concentration is d, and drainage flow is Q2; COD concentration in the carbon source addition pool is e, and flow is Q3; Denitrification filter influent NH4 + -N concentration is f; denitrification filter effluent NH4 + -N concentration is g, effluent NO2 - -N concentration is h, effluent NO3 - -N concentration is i; Q is the total flow of raw sewage; S2: Use sensors to collect NO3 in the effluent of the secondary sedimentation tank online - -N concentration a and NH4 + -N concentration b, raw sewage NH4 + -N concentration c, COD concentration d, COD concentration e in the carbon source addition tank were directly measured, and the NH4 + -N concentration f and NH4 in the effluent + -N concentration g, NO2 - -N concentration h, NO3 - -N concentration i, using flow monitor to collect the secondary sedimentation tank effluent flow Q1, raw sewage drainage flow Q2, and carbon source addition flow Q3; The initial flow rates of the entire process are calculated as follows: Q2=(b+cf) / c*Q Q1=Q-Q2 Q3=(4a*Q1-f*Qd*Q2) / e; After the whole process is started, the following control schemes are included: Denitrification filter inlet ammonia nitrogen regulation method: If the denitrification filter outlet NH4 + If the -N concentration g is less than 1 mg / L for two consecutive days, the PLC automatic control system will transmit the adjustment signal to the drainage pump to increase the pump speed by 1%-3% until f=f+2; otherwise, the control will be stopped and f will remain unchanged; Denitrification filter effluent nitrite nitrogen regulation method: If the denitrification filter effluent NO2 - - If the N concentration h is less than 2 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump to reduce the pumping speed of the carbon source dosing pump by 1%-3%; if h>4 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump to increase the pumping speed of the carbon source dosing pump by 1%-3%; otherwise, the control will be stopped to maintain h unchanged; Method for regulating nitrate nitrogen in denitrification filter effluent: If denitrification filter effluent NO3 - - If the N concentration i is greater than 5 mg / L, the PLC automatic control system will transmit the adjustment signal to the carbon source dosing pump, so that the pump speed of the carbon source dosing pump will be increased by 1%-3%; Otherwise, stop regulating and keep i unchanged.

2. The method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidation sludge according to claim 1, characterized in that: Flow rate monitors are respectively provided at the drainage pump (5.1), the carbon source dosing pipe and the secondary sedimentation tank outlet pipe.

3. The method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidation sludge according to claim 1 or 2, characterized in that: The sensors or flow monitors are all connected to the PLC control system.

4. The method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidation sludge according to claim 1, characterized in that: The denitrification filter (6) is provided with an outlet pipe, and the outlet pipe is connected to the backwash wastewater tank (7) and the clean water tank (8) at the same time, wherein the backwash wastewater tank (7) and the clean water tank (8) are both provided with an outlet pipe.

5. The method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidation sludge according to claim 1, characterized in that: All data measured by any sensor or flow monitor in step (2) are transmitted to the PLC automatic control system (9) for calculation.

6. The method for enriching anaerobic ammonium oxidizing bacteria in a denitrification filter without inoculating short-cut denitrification sludge and anaerobic ammonium oxidation sludge according to claim 1, characterized in that: At the beginning of the whole process, Q2 is set to 0, the COD concentration e in the carbon source addition pool is set to 130-150 g / L, and f is set to 3-5 mg / L.

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