CN113200600B - Device and method for treating high-ammonia-nitrogen organic matter wastewater by semi-shortcut nitrification anaerobic ammonia oxidation and serial shortcut denitrification anaerobic ammonia oxidation - Google Patents

Abstract

A device and a method for treating high ammonia nitrogen organic matter wastewater by semi-shortcut nitrification-anaerobic ammonia oxidation and serial shortcut denitrification-anaerobic ammonia oxidation belong to the field of sewage treatment. Part of ammonia nitrogen in the high ammonia nitrogen organic wastewater is converted into nitrite nitrogen through semi-shortcut nitrification, and then the effluent of the semi-shortcut nitrification reactor is subjected to anaerobic ammonia oxidation reaction in a UASB granular sludge system to synchronously remove the ammonia nitrogen and the nitrite nitrogen; the anaerobic ammonia oxidation effluent containing nitrate nitrogen and the high ammonia nitrogen organic matter wastewater entering in parallel react in the short-cut denitrification anaerobic ammonia oxidation integrated UASB reactor, the nitrate nitrogen is converted into nitrite nitrogen under the action of short-cut denitrifying bacteria, and then the nitrite nitrogen and the high ammonia nitrogen organic matter wastewater entering in parallel undergo anaerobic ammonia oxidation reaction, so that the denitrification rate of the system is further improved. The method provides a new idea for treating the high ammonia nitrogen organic matter wastewater, solves the problems of large energy consumption, low denitrification efficiency and the like, and improves the effluent quality.

Description

Semi-short-cut nitrification and anammox in series with short-cut denitrification and anammox for treatment of high ammonia Device and method for nitrogen organic waste water

technical field

The invention relates to a semi-short-range nitrification anammox series short-range denitrification anammox device and method for treating high-ammonia-nitrogen organic waste water, belonging to the field of sewage biological treatment.

Background technique

With the rapid development of my country's economy and the promotion of the concept of sustainable development, the increasing shortage of water resources has gradually attracted attention. However, a large amount of water resources are polluted due to improper treatment or discharge after being used, among which eutrophication is the most common phenomenon. Today, with the growing chemical fertilizer and petroleum industries, the discharged high-ammonia-nitrogen organic waste water has been highly valued by people in the industry due to its high ammonia-nitrogen content, strong hazards, and difficult treatment. With increasingly stringent sewage discharge standards and deteriorating water quality, the traditional nitrification and denitrification process can no longer meet the requirements of energy saving, high efficiency and high denitrification efficiency. It is imminent to develop a new sustainable denitrification process with improved quality and efficiency.

In the field of sewage biological denitrification, anammox bacteria use nitrite as the electron acceptor to oxidize ammonia to generate nitrogen, so as to achieve the purpose of removing nitrogen pollution in water. The proposal and application of anaerobic ammonium oxidation has promoted the functional transformation of sewage treatment plants from high-energy-consuming terminal treatment to zero-energy or production capacity units, and the combination of anaerobic ammonium oxidation process and other new nitrogen removal processes can even realize wastewater treatment. The deep denitrification, and the upflow anaerobic sludge bed reactor (UASB) is conducive to the effective retention of anammox bacteria. At present, the short-range nitrification process controls the nitrification reaction only to the nitrite nitrogen stage, which greatly reduces the energy consumption of aeration. The semi-short-cut nitrification is to stop aeration before the ammonia valley point to control the ratio of ammonia nitrogen to nitrite nitrogen to 1-1.32, which provides a stable substrate for anaerobic ammonium oxidation.

The short-cut denitrification makes the denitrification stay in the intermediate product nitrite nitrogen to obtain high and stable nitrite accumulation, which can be used for the oxygen ammonium oxidation reaction. The effluent of semi-short-path nitrification anammox will inevitably contain a large amount of nitrate nitrogen. In order to further reduce total nitrogen and improve nitrogen removal efficiency, a short-path denitrification anammox UASB reactor can be connected in series to take advantage of the upflow reactor , to promote the persistence and cooperation of the bacterial flora, so as to realize the deep denitrification of wastewater with high ammonia nitrogen organic matter.

Contents of the invention

The invention proposes a semi-short-path nitrification anaerobic ammonium oxidation device and a method for treating high-ammonia-nitrogen organic waste water in series with short-range denitrification anammox oxidation. Half of the ammonia nitrogen in the high ammonia nitrogen organic wastewater is converted into nitrite nitrogen through semi-short-path nitrification, and then the effluent with a mass concentration ratio of ammonia nitrogen to nitrite nitrogen of 1 to 1.32 undergoes anaerobic ammonium oxidation reaction in the UASB granular sludge system , remove ammonia nitrogen and nitrite nitrogen synchronously; the anammox effluent containing nitrate nitrogen and the high ammonia nitrogen organic wastewater entering in parallel react in the short-range denitrification anammox integrated UASB reactor, and the nitrate nitrogen is Under the action of short-range denitrifying bacteria, it is converted into nitrite nitrogen, and then undergoes anaerobic ammonium oxidation reaction with ammonia nitrogen in high-ammonia nitrogen organic wastewater to further improve the denitrification rate of the system. This method provides a new idea for the treatment of high-ammonia-nitrogen organic waste water, solves the problems of high energy consumption and low denitrification efficiency, and improves the quality of effluent.

The object of the present invention is solved by the following technical scheme: semi-short-path nitrification anammox series short-range denitrification anammox device and method for treating high-ammonia-nitrogen organic waste water, characterized in that:

The devices used include: water inlet tank (1), semi-short-path nitrification SBR reactor (2), first intermediate water tank (3), anaerobic ammonium oxidation UASB reactor (4), second intermediate water tank (5), short-range reaction Nitrification anaerobic ammonium oxidation UASB reactor (6);

The semi-short-path nitrification SBR reactor (2) includes a first peristaltic pump (2.1), a first water inlet (2.2), an aeration tray (2.3), a first water outlet (2.4), a gas flow meter (2.5), Air pump (2.6), agitator (2.7), first pH/DO measuring instrument (2.8); described anaerobic ammonium oxidation UASB reactor (4) comprises second peristaltic pump (4.1), second water inlet (4.2) , a second pH/DO measuring instrument (4.3), a temperature control device (4.4), a second water outlet (4.5); the short-range denitrification anammox UASB reactor (6) includes a third peristaltic pump (6.1) , the third water inlet (6.2), the fourth peristaltic pump (6.3), the third pH/DO measuring instrument (6.4), the return port (6.5), the third water outlet (6.6), the fifth peristaltic pump (6.7);

The high-ammonia-nitrogen organic waste water in the water inlet tank (1) is pumped into the semi-short-path nitrification SBR reactor (2) from the first water inlet (2.2) through the first peristaltic pump (2.1), and the effluent passes through the first water outlet (2.4 ) into the first intermediate water tank (3); the first intermediate water tank (3) is connected to the second water inlet (4.2) of the anaerobic ammonium oxidation UASB reactor (4) through the second peristaltic pump (4.1), and the outlet water passes through the second The second water outlet (4.5) is discharged into the second intermediate water tank (5); the water inlet water tank (1) and the second intermediate water tank (5) are respectively connected to the short-range reverse flow through the fifth peristaltic pump (6.7) and the third peristaltic pump (6.1). The third water inlet (6.2) of the nitrification anaerobic ammonium oxidation UASB reactor (6) is connected, and the return port (6.5) is connected with the third water inlet (6.2) through the fourth peristaltic pump (6.3) to perform sludge return.

The method for using said device is characterized in that it comprises the following steps:

(1) System startup:

(1.1) Start-up of the semi-short-path nitrification SBR reactor: the inoculation sludge is short-path nitrification sludge, the sludge concentration after inoculation is maintained at 3000-3500mg/L, the sludge residence time is 25 days, and the hydraulic retention time is 3-4h. It operates at room temperature; in each cycle, the high ammonia nitrogen organic waste water with NH ₄ ⁺ -N of 200-250 mg/L and COD of 650-1300 mg/L in the water inlet tank (1) is passed through the first peristaltic pump (2.1 ) is pumped into the semi-short-path nitrification SBR reactor (2), the dissolved oxygen is maintained at 2-2.5 mg/L, aerated and stirred for 3 hours, and drained after 1 hour of precipitation, with a drainage ratio of 60%; when the amount of ammonia nitrogen and nitrite nitrogen in the effluent When the mass concentration ratio is 1-1.32 and the stable operation time is 15 days or more, it is considered that the semi-short-path nitrification reactor starts up successfully.

(1.2) Start-up of the anammox UASB reactor: the inoculated sludge is anaerobic ammonium oxidation granular sludge, the sludge concentration after inoculation is maintained at 4500-5000mg/L, the hydraulic retention time is 4h, and the sludge is not actively discharged. The temperature control device keeps the temperature at 30±2°C; the semi-short-path nitrification SBR reactor (2) effluent in the first intermediate water tank (3) is continuously pumped into the anaerobic ammonium oxidation UASB reactor (4) through the second peristaltic pump (4.1) ); when the concentrations of ammonia nitrogen and nitrite nitrogen in the effluent are both less than 1 mg/L and have been in stable operation for 15 days or more, the anaerobic ammonium oxidation UASB reactor is considered to be successfully started.

(1.3) Start-up of short-range denitrification anaerobic ammonium oxidation UASB reactor: the inoculated sludge is the sludge in the short-range denitrification anaerobic ammonium oxidation integrated reactor operated stably in the laboratory, and the sludge concentration after inoculation is maintained at 5000-5500mg /L, the hydraulic retention time is 4h, and it operates at normal temperature. The reactor is provided with reflux, and the reflux ratio is 3.0; the anaerobic ammonium oxidation UASB reactor (4) in the second intermediate water tank (5) has water outlet and water inlet water tank (1 ) mixed with high-ammonia-nitrogen organic waste water through the third peristaltic pump (6.1) and continuously pumped into the short-path denitrification anaerobic ammonium oxidation UASB reactor (6), and the NO _X in the mixed solution is controlled by adjusting the ratio of influent ^- -N The mass concentration ratio of NH ₄ ⁺ -N is 1-1.32; when the concentrations of ammonia nitrogen and nitrate nitrogen in the effluent are both less than 1 mg/L and have been in stable operation for 15 days or more, the short-range denitrification anaerobic ammonium oxidation UASB reactor is considered to be successfully started.

(2) System operation:

(2.1) Operation of the semi-short-path nitrification SBR reactor: NH ₄ ⁺ -N is 200 ~ 250mg/L, COD is 650 ~ 1300mg/L of high ammonia nitrogen organic waste water from the water inlet tank (1) through the first peristaltic pump (2.1 ) is pumped into the semi-short-path nitrification SBR reactor, AO is running, the dissolved oxygen in the aerobic section is controlled at 2-2.5 mg/L through the gas flow meter, and the sludge age is controlled by regular sludge discharge to 25 days; 3 cycles per day, each cycle 8 hours, including 10 minutes of water inflow, 30 to 60 minutes of anaerobic stirring, 3 to 3.5 hours of aeration, 1 hour of sedimentation, 10 minutes of drainage, and 130 to 190 minutes of idle time; the drainage ratio is 60%, and the mixture of NH ₄ ⁺ -N and NO ₂ ^- -N The effluent with a mass concentration ratio of 1-1.32 is discharged into the first intermediate water tank (3).

(2.2) Operation of the anaerobic ammonium oxidation UASB reactor: the sewage of the first intermediate water tank (3) enters the anaerobic ammonium oxidation UASB reactor through the second peristaltic pump (4.1), and the sewage flow rate is 0.75L/h, hydraulic retention The time is 4 hours, without active sludge discharge, and the temperature is controlled at 30±2°C; the anammox bacteria remove NH ₄ ⁺ -N and NO ₂ ^- -N in the influent and convert them into N ₂ , and the effluent containing nitrate nitrogen Drains into the second intermediate tank (5).

(2.3) Operation of short-range denitrification anaerobic ammonium oxidation UASB reactor: the sewage in the second intermediate water tank (5) and the high-ammonia nitrogen organic waste water in the water inlet tank (1) pass through the third peristaltic pump (6.1) and the fifth respectively The peristaltic pump (6.7) enters the short-path denitrification anaerobic ammonium oxidation UASB reactor, and the sewage flows through the third peristaltic pump (6.1) and the fifth peristaltic pump (6.7) are respectively 0.75L/h and 0.125L/h, and the reaction The return port (6.5) on the upper part of the device is connected to the third water inlet (6.2) through the fourth peristaltic pump (6.3) for return flow, the return flow rate is 2.625L/h, the return flow ratio is 3.0, and the outlet water is discharged through the U-shaped pipe.

The invention patent has the following advantages:

1) Through the semi-short-range nitrification reaction, it can not only provide a suitable ratio of ammonia nitrogen and nitrite nitrogen for the subsequent anammox oxidation, but also save aeration energy consumption, which is economical and effective.

2) The upflow anaerobic sludge bed reactor is conducive to the retention of granular anammox bacteria, and realizes the simultaneous removal of ammonia nitrogen and nitrite nitrogen to a greater extent.

3) Short-range denitrifying bacteria and anammox bacteria achieve synergistic denitrification in the upflow anaerobic sludge bed reactor, and the by-product nitrate nitrogen of the previous anammox reactor is processed, and the total nitrogen is further reduced.

4) The short-range denitrification anammox process reduces aeration energy consumption and carbon source requirements, and the sludge output is much smaller than the traditional nitrification and denitrification process, which reduces the subsequent sludge treatment cost.

To sum up, using the present invention to treat high-ammonia-nitrogen organic waste water has the advantages of saving aeration energy consumption, improving denitrification rate, and reducing carbon source demand.

Description of drawings

Fig. 1 is a device and method for treating waste water with high ammonia nitrogen organic matter by semi-short-path nitrification anammox in series with short-path denitrification anammox.

In Figure 1: 1-influent water tank, 2-semi-short-path nitrification SBR reactor, 3-first intermediate water tank, 4-anaerobic ammonium oxidation UASB reactor, 5-second intermediate water tank, 6-short-path denitrification anaerobic Ammoxidation UASB reactor; 2.1-first peristaltic pump, 2.2-first water inlet, 2.3-aeration plate, 2.4-first water outlet, 2.5-gas flow meter, 2.6-air pump, 2.7-stirrer, 2.8- 1st pH/DO measuring instrument; 4.1-Second peristaltic pump, 4.2-Second water inlet, 4.3-Second pH/DO measuring instrument, 4.4-Temperature control device, 4.5-Second water outlet, 6.1-Third peristaltic Pump; 6.2-third water inlet, 6.3-fourth peristaltic pump, 6.4-third pH/DO measuring instrument, 6.5-reflux port, 6.6-third water outlet, 6.7-fifth peristaltic pump.

Detailed ways

Embodiments of the present invention are described in detail below in conjunction with accompanying drawings and examples:

As shown in Figure 1, the semi-short-path nitrification anammox series short-path denitrification anammox device and method for treating high-ammonia nitrogen organic waste water, the devices used include: water inlet tank (1), semi-short-path nitrification SBR reactor (2 ), the first intermediate water tank (3), the anammox UASB reactor (4), the second intermediate water tank (5), the short-range denitrification anammox UASB reactor (6); it is characterized in that the influent The high ammonia nitrogen organic waste water in the water tank (1) is pumped into the semi-short-path nitrification SBR reactor (2) from the first water inlet (2.2) through the first peristaltic pump (2.1), and the effluent is discharged into the second water outlet (2.4) through the first water outlet (2.4). An intermediate water tank (3); the first intermediate water tank (3) is connected to the second water inlet (4.2) of the anaerobic ammonium oxidation UASB reactor (4) by the second peristaltic pump (4.1), and the water outlet is passed through the second water outlet ( 4.5) Discharge into the second intermediate water tank (5); the water inlet tank (1) and the second intermediate water tank (5) pass through the fifth peristaltic pump (6.7) and the third peristaltic pump (6.1) and short-range denitrification anaerobic ammonia respectively The third water inlet (6.2) of the oxidation UASB reactor (6) is connected, and the return port (6.5) is connected with the third water inlet (6.2) through the fourth peristaltic pump (6.3) to perform sludge return.

The experimental system is shown in Figure 1. Each reactor is made of plexiglass. The semi-short-path nitrification SBR reactor (2) has a total volume of 11L and an effective volume of 10L; the anammox UASB reactor (4) has an effective volume of 5L. 3L; the short-range denitrification anaerobic ammonium oxidation UASB reactor (6) has a total volume of 5L and an effective volume of 3L.

During the test, the specific test water was taken from high-ammonia nitrogen organic wastewater discharged from an industrial park in Beijing. The specific water quality is as follows: COD concentration is 650-1300mg/L, NH ₄ ⁺ -N concentration is 200-250mg/L, NO ₂ ^- - N concentration < 1mg/L, NO ₃ ^- -N concentration < 1mg/L.

The specific operation is as follows:

(1) System startup:

(1.1) Start-up of the semi-short-path nitrification SBR reactor: the inoculation sludge is short-path nitrification sludge, the sludge concentration after inoculation is maintained at 3000-3500mg/L, the sludge residence time is 25 days, and the hydraulic retention time is 3-4h. It operates at room temperature; in each cycle, the high ammonia nitrogen organic waste water with NH ₄ ⁺ -N of 200-250 mg/L and COD of 650-1300 mg/L in the water inlet tank (1) is passed through the first peristaltic pump (2.1 ) is pumped into the semi-short-path nitrification SBR reactor (2), the dissolved oxygen is maintained at 2-2.5 mg/L, aerated and stirred for 3 hours, and drained after 1 hour of precipitation, with a drainage ratio of 60%; when the amount of ammonia nitrogen and nitrite nitrogen in the effluent When the mass concentration ratio is 1-1.32 and the stable operation time is 15 days or more, it is considered that the semi-short-path nitrification reactor starts up successfully.

(1.2) Start-up of the anammox UASB reactor: the inoculated sludge is anaerobic ammonium oxidation granular sludge, the sludge concentration after inoculation is maintained at 4500-5000mg/L, the hydraulic retention time is 4h, and the sludge is not actively discharged. The temperature control device keeps the temperature at 30±2°C; the semi-short-path nitrification SBR reactor (2) effluent in the first intermediate water tank (3) is continuously pumped into the anaerobic ammonium oxidation UASB reactor (4) through the second peristaltic pump (4.1) ); when the concentrations of ammonia nitrogen and nitrite nitrogen in the effluent are both less than 1 mg/L and have been in stable operation for 15 days or more, the anaerobic ammonium oxidation UASB reactor is considered to be successfully started.

(1.3) Start-up of short-range denitrification anaerobic ammonium oxidation UASB reactor: the inoculated sludge is the sludge in the short-range denitrification anaerobic ammonium oxidation integrated reactor operated stably in the laboratory, and the sludge concentration after inoculation is maintained at 5000-5500mg /L, the hydraulic retention time is 4h, and it operates at normal temperature. The reactor is provided with reflux, and the reflux ratio is 3.0; the anaerobic ammonium oxidation UASB reactor (4) in the second intermediate water tank (5) has water outlet and water inlet water tank (1 ) mixed with high-ammonia-nitrogen organic waste water through the third peristaltic pump (6.1) and continuously pumped into the short-path denitrification anaerobic ammonium oxidation UASB reactor (6), and the NO _X in the mixed solution is controlled by adjusting the ratio of influent ^- -N The mass concentration ratio of NH ₄ ⁺ -N is 1-1.32; when the concentrations of ammonia nitrogen and nitrate nitrogen in the effluent are both less than 1 mg/L and have been in stable operation for 15 days or more, the short-range denitrification anaerobic ammonium oxidation UASB reactor is considered to be successfully started.

(2) System operation:

(2.1) Operation of the semi-short-path nitrification SBR reactor: NH ₄ ⁺ -N is 200 ~ 250mg/L, COD is 650 ~ 1300mg/L of high ammonia nitrogen organic waste water from the water inlet tank (1) through the first peristaltic pump (2.1 ) is pumped into the semi-short-path nitrification SBR reactor, AO is running, the dissolved oxygen in the aerobic section is controlled at 2-2.5 mg/L through the gas flow meter, and the sludge age is controlled by regular sludge discharge to 25 days; 3 cycles per day, each cycle 8 hours, including 10 minutes of water inflow, 30 to 60 minutes of anaerobic stirring, 3 to 3.5 hours of aeration, 1 hour of sedimentation, 10 minutes of drainage, and 130 to 190 minutes of idle time; the drainage ratio is 60%, and the mixture of NH ₄ ⁺ -N and NO ₂ ^- -N The effluent with a mass concentration ratio of 1-1.32 is discharged into the first intermediate water tank (3).

(2.2) Operation of the anaerobic ammonium oxidation UASB reactor: the sewage of the first intermediate water tank (3) enters the anaerobic ammonium oxidation UASB reactor through the second peristaltic pump (4.1), and the sewage flow rate is 0.75L/h, hydraulic retention The time is 4 hours, without active sludge discharge, and the temperature is controlled at 30±2°C; the anammox bacteria remove NH ₄ ⁺ -N and NO ₂ ^- -N in the influent and convert them into N ₂ , and the effluent containing nitrate nitrogen Drains into the second intermediate tank (5).

(2.3) Operation of short-range denitrification anaerobic ammonium oxidation UASB reactor: the sewage in the second intermediate water tank (5) and the high-ammonia nitrogen organic waste water in the water inlet tank (1) pass through the third peristaltic pump (6.1) and the fifth respectively The peristaltic pump (6.7) enters the short-path denitrification anaerobic ammonium oxidation UASB reactor, and the sewage flows through the third peristaltic pump (6.1) and the fifth peristaltic pump (6.7) are respectively 0.75L/h and 0.125L/h, and the reaction The return port (6.5) on the upper part of the device is connected to the third water inlet (6.2) through the fourth peristaltic pump (6.3) for return flow, the return flow rate is 2.625L/h, the return flow ratio is 3.0, and the outlet water is discharged through the U-shaped pipe.

The test results show that after the system runs stably, the semi-short-cut nitrification stage can achieve a 40-50% nitrite accumulation rate, and the ratio of effluent ammonia nitrogen to nitrite nitrogen is about 1-1.32; Nitrogen is converted into nitrogen gas as an electron acceptor. The nitrate nitrogen in the effluent and the ammonia nitrogen in the wastewater are simultaneously removed in the short-range denitrification anammox stage. The effluent COD is less than 50mg/L, the effluent ammonia nitrogen is less than 5mg/L, and the effluent total nitrogen is less than 15mg/L, realizing the deep denitrification of high ammonia nitrogen organic matter wastewater.

The above are specific embodiments of the present invention, which are convenient for those skilled in the art to better understand and apply the present invention, but the implementation of the present invention is not limited thereto, so those skilled in the art can make simple improvements to the present invention. Within the protection scope of the present invention.

Claims (1)

1. The method for treating the high ammonia nitrogen organic matter wastewater by the semi-shortcut nitrification-anaerobic ammonia oxidation and the serial shortcut denitrification-anaerobic ammonia oxidation comprises the following steps: the system comprises a water inlet tank (1), a semi-short-cut nitrification SBR reactor (2), a first intermediate water tank (3), an anaerobic ammonium oxidation UASB reactor (4), a second intermediate water tank (5) and a short-cut denitrification anaerobic ammonium oxidation UASB reactor (6);

the semi-short-cut nitrification SBR reactor (2) comprises a first peristaltic pump (2.1), a first water inlet (2.2), an aeration disc (2.3), a first water outlet (2.4), a gas flowmeter (2.5), a gas pump (2.6), a stirrer (2.7) and a first pH/DO tester (2.8); the anaerobic ammonia oxidation UASB reactor (4) comprises a second peristaltic pump (4.1), a second water inlet (4.2), a second pH/DO tester (4.3), a temperature control device (4.4) and a second water outlet (4.5); the short-cut denitrification anaerobic ammonia oxidation UASB reactor (6) comprises a third peristaltic pump (6.1), a third water inlet (6.2), a fourth peristaltic pump (6.3), a third pH/DO tester (6.4), a reflux port (6.5), a third water outlet (6.6) and a fifth peristaltic pump (6.7);

high ammonia nitrogen organic wastewater in the water inlet tank (1) is pumped into the half-short-cut nitrification SBR reactor (2) from a first water inlet (2.2) through a first peristaltic pump (2.1), and effluent is discharged into a first intermediate water tank (3) through a first water outlet (2.4); the first intermediate water tank (3) is connected with a second water inlet (4.2) of the anaerobic ammonia oxidation UASB reactor (4) through a second peristaltic pump (4.1), and the outlet water is discharged into a second intermediate water tank (5) through a second water outlet (4.5); the water inlet tank (1) and the second intermediate tank (5) are respectively connected with a third water inlet (6.2) of the short-range denitrification anaerobic ammonia oxidation UASB reactor (6) through a fifth peristaltic pump (6.7) and a third peristaltic pump (6.1), and the return port (6.5) is connected with the third water inlet (6.2) through a fourth peristaltic pump (6.3) and performs sludge return;

the method is characterized by comprising the following steps:

(1) Starting the system:

(1.1) starting a half-short-cut nitrification SBR reactor: the inoculated sludge is short-range nitrified sludge, the concentration of the inoculated sludge is kept at 3000-3500mg/L, the sludge retention time is 25 days, the hydraulic retention time is 3-4h, and the operation is carried out at room temperature; in each period, NH in the inlet water tank (1) is added ₄ ⁺ Pumping the high ammonia nitrogen organic wastewater with N of 200-250 mg/L and COD of 650-1300 mg/L into a half short-cut nitrification SBR reactor (2) through a first peristaltic pump (2.1),keeping the dissolved oxygen at 2-2.5 mg/L, aerating and stirring for 3h, and draining water after precipitating for 1h, wherein the drainage ratio is 60%; when the mass concentration ratio of ammonia nitrogen to nitrite nitrogen in the effluent is 1-1.32 and the operation is stable for 15 days or more, the starting of the semi-short-cut nitrification SBR reactor is considered to be successful;

(1.2) starting up of anaerobic ammonia oxidation UASB reactor: the inoculated sludge is anaerobic ammonium oxidation granular sludge, the concentration of the inoculated sludge is kept at 4500-5000mg/L, the hydraulic retention time is 4h, the sludge is not actively discharged, and the temperature is kept at 30 +/-2 ℃ by a temperature control device; the effluent of the half-short-cut nitrification SBR reactor (2) in the first intermediate water tank (3) is continuously pumped into an anaerobic ammonia oxidation UASB reactor (4) through a second peristaltic pump (4.1); when the concentrations of ammonia nitrogen and nitrite nitrogen in the effluent are both less than 1mg/L and the anaerobic ammonia oxidation UASB reactor is considered to be successfully started after the anaerobic ammonia oxidation UASB reactor is stably operated for 15 days or more;

(1.3) starting a short-cut denitrification anaerobic ammonia oxidation UASB reactor: the inoculated sludge is sludge in a short-cut denitrification anaerobic ammonia oxidation integrated reactor which stably runs in a laboratory, the concentration of the inoculated sludge is kept at 5000-5500mg/L, the hydraulic retention time is 4h, the reactor runs at normal temperature, and the reflux ratio of the reactor is 3.0; the effluent of the anaerobic ammonia oxidation UASB reactor (4) in the second intermediate water tank (5) and the high ammonia nitrogen organic wastewater in the water inlet water tank (1) are respectively and continuously pumped into the short-range denitrification anaerobic ammonia oxidation UASB reactor (6) through a third peristaltic pump (6.1) and a fifth peristaltic pump (6.7), and the NO in the mixed solution is controlled by adjusting the water inlet proportion _X ^- -N and NH ₄ ⁺ -the mass concentration ratio of N is 1-1.32; when the concentrations of ammonia nitrogen and nitrate nitrogen in the effluent are both less than 1mg/L and the effluent stably runs for 15d or more, the startup of the short-range denitrification anaerobic ammonia oxidation UASB reactor is considered to be successful;

(2) The operation of the system is as follows:

(2.1) operation of the half-short-cut nitrification SBR reactor: NH (NH) ₄ ⁺ Pumping high ammonia nitrogen organic wastewater with N of 200-250 mg/L and COD of 650-1300 mg/L into a half-short-cut nitrification SBR reactor from a water inlet tank (1) through a first peristaltic pump (2.1), operating AO, controlling dissolved oxygen at 2-2.5 mg/L by an aerobic section through a gas flowmeter, and controlling sludge age to be 25 days by periodic sludge discharge; the device is operated for 3 cycles every day, each cycle is 8h, and the device comprises water inlet 10min, anaerobic stirring is carried out for 30-60 min, aeration is carried out for 3-3.5 h, sedimentation is carried out for 1h, water is drained for 10min, and the operation is carried out for idle 130-190 min; water discharge ratio of 60%, NH ₄ ⁺ -N and NO ₂ ^- -the effluent with a mass concentration ratio of N of 1 to 1.32 is discharged into the first intermediate tank (3);

(2.2) operation of anaerobic ammonia oxidation UASB reactor: sewage in the first intermediate water tank (3) enters an anaerobic ammonia oxidation UASB reactor through a second peristaltic pump (4.1), the flow of the sewage is 0.75L/h, the hydraulic retention time is 4h, sludge is not actively discharged, and the temperature is controlled to be 30 +/-2 ℃; NH in the inlet water by anaerobic ammonium oxidation bacteria ₄ ⁺ -N and NO ₂ ^- Removal of-N to N ₂ The effluent containing nitrate nitrogen is discharged into a second intermediate water tank (5);

(2.3) operation of the short-cut denitrification anaerobic ammonia oxidation UASB reactor: the sewage of the second intermediate water tank (5) and the high ammonia nitrogen organic wastewater in the water inlet tank (1) respectively enter a UASB reactor through a third peristaltic pump (6.1) and a fifth peristaltic pump (6.7), the sewage flow through the third peristaltic pump (6.1) and the fifth peristaltic pump (6.7) is respectively 0.75L/h and 0.125L/h, a backflow port (6.5) at the upper part of the reactor is connected with a third water inlet (6.2) through a fourth peristaltic pump (6.3) for backflow, the backflow amount is 2.625L/h, the backflow ratio is 3.0, and the effluent is discharged through a U-shaped pipe.

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