Nitrogen-containing wastewater treatment device and method for treating nitrogen-containing wastewater

Abstract

The invention relates to the technical field of nitrogen-containing wastewater treatment, in particular to a nitrogen-containing wastewater treatment device and a method for treating nitrogen-containing wastewater. The device comprises a reactor, an aeration assembly, a water inlet assembly and a monitoring assembly, a guide cylinder is coaxially arranged in the reactor; the reactor is filled with microorganism balls; the monitoring assembly comprises a main controller and a plurality of detection probes; the main controller is arranged outside the reactor, and each detection probe is arranged inside the reactor; the main controller is respectively connected with each detection probe through a line; one end of the water inlet assembly is communicated with nitrogenous wastewater, and the other end is communicated with the bottom of the reactor; the water inlet assembly comprises a water inlet pump connected with the main controller; one end of the aeration assembly is communicated with air or oxygen, and the other end is communicated with the bottom of the reactor; and the aeration assembly comprises an air blower connected with the main controller. The method adopts the device to treat the nitrogen-containing wastewater. The device has the effects of simple and compact structure, small occupied area, low operation cost and good nitrogen removal performance.

Description

Technical Field

[0001] The present invention relates to the technical field of nitrogen-containing wastewater treatment, and in particular to a nitrogen-containing wastewater treatment device and a method for treating nitrogen-containing wastewater. Background Art

[0002] A large amount of nitrogen entering the water body causes the water quality to decline and forms nitrogen-containing wastewater. When the nitrogen content in the water body accumulates to a certain level, it will form eutrophic water bodies, which are specifically manifested as the massive reproduction of algae, the decline of dissolved oxygen and transparency in the water body, and the water quality will deteriorate rapidly. Nitrate nitrogen and nitrite nitrogen in the water body will cause harm to humans and aquatic organisms. Long-term drinking of water containing nitrate nitrogen by humans will cause chronic poisoning, while nitrite nitrogen can react with hemoglobin in humans and aquatic organisms to be converted into methemoglobin, affecting oxygen transmission capacity. In addition, the reaction of nitrite nitrogen with proteins in the human body will induce the formation of nitrosamines in the body, thereby increasing the risk of cancer. Therefore, nitrogen-containing wastewater has a serious destructive effect on urban ecology, further affecting the daily lives of the general public.

[0003] The existing domestic methods for treating nitrogen-containing wastewater can be simply divided into three categories: physical treatment, chemical treatment and biological treatment. However, the main problems of these methods are as follows: long process flow, complex facilities, large land area and high infrastructure investment; slow growth of nitrifying bacteria and difficulty in maintaining high biological concentrations, resulting in poor nitrogen removal performance; if the aeration tank is enlarged and the hydraulic retention time is extended for a long time, the investment cost and operating cost will increase.

[0004] In summary, it is necessary to provide a nitrogen-containing wastewater treatment device and a method for treating nitrogen-containing wastewater to solve the problems of complex facilities, large floor space, high operating costs and poor nitrogen removal performance in the prior art. Summary of the invention

[0005] The object of the present invention is to provide a nitrogen-containing wastewater treatment device and a method for treating nitrogen-containing wastewater with a simple and compact structure, a small footprint, low operating cost and good nitrogen removal performance. The specific technical scheme is as follows:

[0006] In a first aspect, the present invention provides a nitrogen-containing wastewater treatment device, comprising a reactor, an aeration component, a water inlet component and a monitoring component; a guide tube is coaxially arranged in the reactor; microbial balls are filled in the reactor; the monitoring component comprises a main controller and a plurality of detection probes; the main controller is arranged outside the reactor, and each of the detection probes is arranged inside the reactor; the main controller is connected to each of the detection probes through a line; one end of the water inlet component is connected to the nitrogen-containing wastewater, and the other end is connected to the bottom of the reactor; the water inlet component comprises a water inlet pump connected to the main controller; one end of the aeration component is connected to the air or oxygen, and the other end is connected to the bottom of the reactor; the aeration component comprises a blower connected to the main controller.

[0007] Optionally, the axial height of the guide tube is 1 / 2 to 3 / 4 times the axial height inside the reactor; the inner diameter of the guide tube is 1 / 4 to 1 / 2 times the inner diameter of the reactor; the axial height inside the reactor is 3 to 7 m, and the height-to-diameter ratio is 2 to 6.

[0008] Optionally, the diameter of the microbial ball is 3 to 6 mm.

[0009] Optionally, a ladder structure is arranged from bottom to top on the side wall inside the reactor.

[0010] Optionally, the aeration assembly also includes an aeration pipeline, an aeration valve and an aeration plate; one end of the aeration pipeline is connected to the air outlet of the blower, and the other end is connected to the aeration plate; the aeration valve is arranged on the aeration pipeline; the aeration plate is arranged at the bottom of the reactor, and includes a total air inlet and a plurality of pressurized air outlet holes annularly arranged around the total air inlet; the total air inlet is connected to the aeration pipeline; each of the pressurized air outlet holes is connected to the total air inlet.

[0011] Optionally, the water inlet assembly further includes a water inlet pipeline, a water inlet valve and a water distribution pipe; one end of the water inlet pipeline is connected to the water inlet pump, and the other end is connected to the water distribution pipe; the water distribution pipe is arranged at the bottom of the reactor, and a plurality of water outlets are arranged thereon; the water inlet valve is arranged on the water inlet pipeline;

[0012] The water distribution pipe, the aeration plate and the guide tube are arranged in sequence from bottom to top in the reactor;

[0013] The nitrogen-containing wastewater treatment device further comprises a drain pipeline and a drain valve; the drain pipeline is connected to the bottom of the reactor; and the drain valve is arranged on the drain pipeline.

[0014] Optionally, a water collecting trough is arranged on the top of the reactor; one side of the water collecting trough is connected to the nitrogen-containing wastewater in the reactor through a water outlet baffle, and the other side is connected to a water outlet pipeline; a water outlet valve is arranged on the water outlet pipeline; the water outlet baffle is connected and fixed by a bracket arranged on the water collecting trough.

[0015] Optionally, the reactor comprises an open-top structure or a reactor structure with a narrow bottom and a wide top;

[0016] An observation hole and a manhole are arranged on the side wall of the reactor structure; and a feeding hole is arranged on the top of the reactor structure.

[0017] Optionally, the main controller includes a PLC controller; each of the detection probes includes a pH probe, a dissolved oxygen probe, a temperature probe, an ammonia nitrogen probe, a total nitrogen probe, a COD probe, a BOD probe and a total phosphorus probe.

[0018] In a second aspect, the present invention provides a method for treating nitrogen-containing wastewater using the nitrogen-containing wastewater treatment device, comprising:

[0019] Fixing the reactor on the operation site via a mounting frame;

[0020] The main controller starts the water inlet component to introduce nitrogen-containing wastewater into the reactor, and controls the water inlet flow rate to be 0.2-17 m3 / h; the main controller starts the aeration component to introduce air or oxygen into the reactor, and controls the air-water flow ratio to be 2.5-3.5;

[0021] The main controller adjusts the water inlet flow rate of the water inlet component and the aeration flow rate of the aeration component in real time according to the information detected and fed back by each detection probe; if the C / N ratio is lower than 4, a carbon source needs to be added to the reactor;

[0022] The nitrogen-containing wastewater flows through the long flow path surrounded by the reactor and the guide tube, flows into the water collection tank after being purified by the microbial balls, and flows out through the outlet pipe.

[0023] The application of the technical solution of the present invention has at least the following beneficial effects:

[0024] (1) The present invention provides a nitrogen-containing wastewater treatment device, which has the effects of simple and compact structure, small footprint, low operating cost and good nitrogen removal performance. Specifically, a guide tube is coaxially arranged in the reactor, so that the incoming water floats upward along the guide tube under the action of aeration, which increases the contact time and area between the nitrogen-containing wastewater and the microbial ball, not only improving the purification efficiency of the nitrogen-containing wastewater, but also reducing the operating cost; when the liquid level exceeds the guide tube, the nitrogen-containing wastewater overflows to both sides and moves downward under the action of gravity to form a circulating flow, which helps to maintain uniform mixing of the nitrogen-containing wastewater in the reactor and can avoid dead corners in the nitrogen-containing wastewater; the microbial ball contains aerobic denitrifying microorganisms, and air is introduced into the reactor through the aeration component. Gas or oxygen increases the dissolved oxygen content in the water body, which is beneficial to the respiration of aerobic denitrifying microorganisms and the degradation of nitrogen-containing organic matter; in addition, the bubbles generated by aeration can also realize the fluidization state of the microbial balls in the water body through the guide tube, promote the mixing and flow of nitrogen-containing organic matter to be degraded in the water body, and help improve the mass transfer efficiency; in addition, the microbial balls provide a stable environment for the growth and metabolism of aerobic denitrifying microorganisms, so that the microorganisms can more effectively treat organic matter in nitrogen-containing wastewater; by supplementing or discharging the microbial balls, the concentration of microorganisms in the reactor can be flexibly and dynamically controlled. In addition, the present invention uses the main controller to adjust the water inlet flow rate of the water inlet component and the aeration flow rate of the aeration component in real time according to the information detected and fed back by each of the detection probes, to ensure sufficient purification of the nitrogen-containing wastewater.

[0025] (2) The method for treating nitrogen-containing wastewater by using a nitrogen-containing wastewater treatment device provided by the present invention not only has good nitrogen removal performance, but also can realize intelligent operation.

[0026] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 is a schematic structural diagram of a nitrogen-containing wastewater treatment device in Example 1 (the direction of the arrow in the reactor indicates the direction of water flow);

[0029] Figure 2 yes Figure 1 A top view of the reactor;

[0030] Figure 3 It is a top view of the aeration plate;

[0031] Figure 4It is a structural schematic diagram of the water outlet baffle;

[0032] Figure 5 is a schematic structural diagram of a nitrogen-containing wastewater treatment device in Example 2 (the direction of the arrow in the reactor indicates the direction of water flow);

[0033] Figure 6 yes Figure 5 A top perspective view of the reactor;

[0034] Among them, 1. Reactor, 2. Aeration component, 2.1. Blower, 2.2. Aeration pipeline, 2.3. Aeration valve, 2.4. Aeration plate, 2.4.1. Main air inlet, 2.4.2. Pressurized air outlet, 3. Water inlet component, 3.1. Water inlet pump, 3.2. Water inlet pipeline, 3.3. Water inlet valve, 3.4. Water distribution pipe, 4. Monitoring component, 4.1. Main controller, 4.2. Detection probe, 5. Guide tube, 6. Microbial ball, 7. Drain pipeline, 8. Drain valve, 9. Sump, 10. Water outlet baffle, 11. Water outlet pipeline, 12. Water outlet valve, 13. Ladder structure, 14. Observation hole, 15. Manhole, 16. Feed hole. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] See also Figure 1-Figure 4 A nitrogen-containing wastewater treatment device comprises a reactor 1 (specifically, an open-top structure with a narrow bottom and a wide top), an aeration component 2, a water inlet component 3 and a monitoring component 4; a guide tube 5 is coaxially arranged in the reactor 1; a microbial ball 6 is filled in the reactor 1; the monitoring component 4 comprises a main controller 4.1 and a plurality of detection probes 4.2; the main controller 4.1 is arranged outside the reactor 1, and each of the detection probes 4.2 is arranged inside the reactor 1; the main controller 4.1 is connected to each of the detection probes 4.2 through a line; one end of the water inlet component 3 is connected to the nitrogen-containing wastewater, and the other end is connected to the bottom of the reactor 1; the water inlet component 3 comprises a water inlet pump 3.1 connected to the main controller 4.1; one end of the aeration component 2 is connected to the air, and the other end is connected to the bottom of the reactor 1; the aeration component 2 comprises a blower 2.1 connected to the main controller 4.1.

[0038] A guide tube 5 is coaxially arranged in the reactor 1, so that the influent water floats upward along the guide tube 5 under the action of aeration, which increases the contact time and area between the nitrogen-containing wastewater and the microbial ball 6, not only improving the purification efficiency of the nitrogen-containing wastewater, but also reducing the operating cost; when the liquid level exceeds the guide tube 5, the nitrogen-containing wastewater overflows to both sides and moves downward under the action of gravity to form a circulating flow, which helps to maintain uniform mixing of the nitrogen-containing wastewater in the reactor 1 and can avoid dead corners in the nitrogen-containing wastewater; the microbial ball 6 contains aerobic denitrifying microorganisms (such as denitrifying bacteria), which are fed to the reactor 1 through the aeration component 2. Air is introduced into the reactor 1 to increase the dissolved oxygen content in the water body, which is beneficial to the respiration of aerobic denitrifying microorganisms and the degradation of nitrogen-containing organic matter. In addition, the bubbles generated by aeration can also realize the fluidization state of the microbial balls 6 in the water body through the guide tube 5, promote the mixing and flow of nitrogen-containing organic matter to be degraded in the water body, and help improve the mass transfer efficiency. In addition, the microbial balls 6 provide a stable environment for the growth and metabolism of aerobic denitrifying microorganisms, so that the microorganisms can more effectively treat organic matter in nitrogen-containing wastewater. By replenishing or discharging the microbial balls 6, the concentration of microorganisms in the reactor 1 can be flexibly and dynamically controlled.

[0039] The axial height of the guide tube 5 is 2 / 3 times the axial height inside the reactor 1, and the inner diameter of the guide tube 5 is 1 / 3 times the inner diameter of the reactor 1, which can effectively increase the contact time and area between the nitrogen-containing wastewater and the microbial balls 6; the axial height inside the reactor 1 is 3 to 7m (specifically 6m can be selected), and the height-to-diameter ratio is 2 to 6 (specifically 4 can be selected), which can effectively increase the residence time of the nitrogen-containing wastewater in the reactor 1 and improve the purification effect.

[0040] The diameter of the microbial ball 6 is 3-6 mm (specifically 4 mm), which is convenient for reasonably loading the microbial content on the one hand, and for realizing the fluidized state of the microbial ball 6 in the water body on the other hand.

[0041] A ladder structure 13 is arranged on the side wall of the reactor 1 from bottom to top.

[0042] The aeration assembly 2 also includes an aeration pipeline 2.2, an aeration valve 2.3 and an aeration plate 2.4; one end of the aeration pipeline 2.2 is connected to the air outlet of the blower 2.1, and the other end is connected to the aeration plate 2.4; the aeration valve 2.3 is arranged on the aeration pipeline 2.2; the aeration plate 2.4 is arranged at the bottom of the reactor 1, and includes a total air inlet hole 2.4.1 and a plurality of pressurized air outlet holes 2.4.2 annularly arranged around the total air inlet hole 2.4.1; the total air inlet hole 2.4.1 is connected to the aeration pipeline 2.2; each of the pressurized air outlet holes 2.4.2 is connected to the total air inlet hole 2.4.1 to achieve uniform aeration. Each of the pressurized outlet pores 2.4.2 forms a high-density microporous structure. When the gas passes through the micropores, the pore resistance of the micropores themselves will force the gas to accumulate pressure at the pore mouth. When the pressure exceeds the pore resistance threshold, the gas is evenly released in the form of smaller bubbles, achieving a pressurized effect, forcing the microbial ball 6 to have sufficient rising kinetic energy to float in the guide tube 5, and even rise through the guide tube 5.

[0043] The water inlet assembly 3 also includes a water inlet pipeline 3.2, a water inlet valve 3.3 and a water distribution pipe 3.4; one end of the water inlet pipeline 3.2 is connected to the water inlet pump 3.1, and the other end is connected to the water distribution pipe 3.4; the water distribution pipe 3.4 is arranged at the bottom of the reactor 1, and a plurality of water outlets are arranged thereon to facilitate the uniform outflow of nitrogen-containing wastewater; the water inlet valve 3.3 is arranged on the water inlet pipeline 3.2;

[0044] See also Figure 1 The water distribution pipe 3.4, the aeration plate 2.4 and the guide tube 5 are arranged in sequence from bottom to top in the reactor 1. On the one hand, it is convenient for the water gas to be evenly mixed. On the other hand, the incoming water floats upward along the guide tube 5 under the action of aeration, thereby increasing the contact time and area between the nitrogen-containing wastewater and the microbial ball 6, which not only improves the purification efficiency of the nitrogen-containing wastewater, but also reduces the operating cost.

[0045] The nitrogen-containing wastewater treatment device further includes an emptying pipeline 7 and an emptying valve 8 ; the emptying pipeline 7 is connected to the bottom of the reactor 1 ; and the emptying valve 8 is arranged on the emptying pipeline 7 .

[0046] A water collecting tank 9 is arranged on the top of the reactor 1; one side of the water collecting tank 9 is connected to the nitrogen-containing wastewater in the reactor 1 through a water outlet baffle 10, and the other side is connected to a water outlet pipeline 11; a water outlet valve 12 is arranged on the water outlet pipeline 11; the water outlet baffle 10 is connected and fixed by a bracket arranged on the water collecting tank 9, specifically, the bracket on the water collecting tank 9 is arranged vertically, and the water outlet baffle 10 is arranged inclined toward the outer periphery of the water collecting tank 9, and forms an acute angle with the bracket to prevent the loss of the microbial ball 6. A water outlet grid is arranged on the water outlet baffle 10 to facilitate the isolation of pollutants.

[0047] The main controller 4.1 includes a PLC controller; each of the detection probes 4.2 includes a pH probe, a dissolved oxygen probe, a temperature probe, an ammonia nitrogen probe, a total nitrogen probe, a COD probe, a BOD probe and a total phosphorus probe.

[0048] The method for treating nitrogen-containing wastewater by the nitrogen-containing wastewater treatment device is as follows:

[0049] Fixing the reactor 1 on the operation site through a mounting frame;

[0050] The main controller 4.1 starts the water inlet assembly 3 to introduce nitrogen-containing wastewater into the reactor 1, and controls the water inlet flow rate to be 0.2-17 m3 / h; the main controller 4.1 starts the aeration assembly 2 to introduce air into the reactor 1, and controls the air-water flow ratio to be 2.5-3.5;

[0051] The main controller 4.1 regulates the water flow rate of the water inlet component 3 and the aeration flow rate of the aeration component 2 in real time according to the information detected and fed back by each of the detection probes 4.2; if the C / N ratio is lower than 4, a carbon source (specifically sodium acetate) needs to be added to the reactor 1, and the addition of the carbon source is used to supplement the organic carbon source required for the denitrification process, provide an electron donor for the denitrifying bacteria, and promote the denitrification of nitrates (specifically NO in nitrates). 3- ) is converted into nitrogen (N 2 ) denitrification reaction, thereby improving the denitrification efficiency of the system and ensuring that the total nitrogen in the effluent meets the standard;

[0052] The nitrogen-containing wastewater flows through the long flow path surrounded by the reactor 1 and the guide tube 5 , and after being purified by the microbial balls 6 , flows into the water collection tank 9 , and flows out through the outlet pipe 11 .

[0053] Embodiment 2:

[0054] Different from Example 1, see Figure 5-Figure 6 The reactor 1 is a reactor structure; an observation hole 14 and a manhole 15 are arranged on the side wall of the reactor structure; a transparent glass is arranged on the observation hole 14 for easy observation; and a feeding hole 16 is arranged on the top of the reactor structure.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A nitrogen-containing wastewater treatment device, characterized in that: The invention comprises a reactor (1), an aeration component (2), a water inlet component (3) and a monitoring component (4); a flow guide tube (5) is coaxially arranged in the reactor (1); microbial balls (6) are filled in the reactor (1); the monitoring component (4) comprises a main controller (4.1) and a plurality of detection probes (4.2); the main controller (4.1) is arranged outside the reactor (1), and each of the detection probes (4.2) is arranged inside the reactor (1); the main controller (4.1) ) are connected to each of the detection probes (4.2) through lines; one end of the water inlet component (3) is connected to the nitrogen-containing wastewater, and the other end is connected to the bottom of the reactor (1); the water inlet component (3) includes a water inlet pump (3.1) connected to the main controller (4.1); one end of the aeration component (2) is connected to the air or oxygen, and the other end is connected to the bottom of the reactor (1); the aeration component (2) includes a blower (2.1) connected to the main controller (4.1).

2. The nitrogen-containing wastewater treatment device according to claim 1, characterized in that: The axial height of the guide tube (5) is 1 / 2 to 3 / 4 times the axial height inside the reactor (1); the inner diameter of the guide tube (5) is 1 / 4 to 1 / 2 times the inner diameter of the reactor (1); the axial height inside the reactor (1) is 3 to 7 m, and the height-to-diameter ratio is 2 to 6.

3. The nitrogen-containing wastewater treatment device according to claim 1, characterized in that: The diameter of the microbial ball (6) is 3 to 6 mm.

4. The nitrogen-containing wastewater treatment device according to claim 1, characterized in that: A ladder structure (13) is arranged from bottom to top on the side wall inside the reactor (1).

5. The nitrogen-containing wastewater treatment device according to any one of claims 1 to 4, characterized in that: The aeration assembly (2) further comprises an aeration pipeline (2.2), an aeration valve (2.3) and an aeration plate (2.4); one end of the aeration pipeline (2.2) is connected to the air outlet of the blower (2.1), and the other end is connected to the aeration plate (2.4); the aeration valve (2.3) is arranged on the aeration pipeline (2.2); the aeration plate (2.4) is arranged at the bottom of the reactor (1), and comprises a total air inlet (2.4.1) and a plurality of pressurized air outlet holes (2.4.2) arranged circumferentially around the total air inlet hole (2.4.1); the total air inlet hole (2.4.1) is in communication with the aeration pipeline (2.2); and each of the pressurized air outlet holes (2.4.2) is in communication with the total air inlet hole (2.4.1).

6. The nitrogen-containing wastewater treatment device according to claim 5, characterized in that: The water inlet assembly (3) further comprises a water inlet pipeline (3.2), a water inlet valve (3.3) and a water distribution pipe (3.4); one end of the water inlet pipeline (3.2) is connected to the water inlet pump (3.1), and the other end is connected to the water distribution pipe (3.4); the water distribution pipe (3.4) is arranged at the bottom of the reactor (1), and a plurality of water outlets are arranged thereon; the water inlet valve (3.3) is arranged on the water inlet pipeline (3.2); The water distribution pipe (3.4), the aeration plate (2.4) and the flow guide tube (5) are arranged in sequence from bottom to top in the reactor (1); The nitrogen-containing wastewater treatment device further comprises an emptying pipeline (7) and an emptying valve (8); the emptying pipeline (7) is connected to the bottom of the reactor (1); and the emptying valve (8) is arranged on the emptying pipeline (7).

7. The nitrogen-containing wastewater treatment device according to claim 6, characterized in that: A water collecting trough (9) is arranged on the top of the reactor (1); one side of the water collecting trough (9) is connected to the nitrogen-containing wastewater in the reactor (1) through a water outlet baffle (10), and the other side is connected to a water outlet pipeline (11); a water outlet valve (12) is arranged on the water outlet pipeline (11); and the water outlet baffle (10) is connected and fixed by a bracket arranged on the water collecting trough (9).

8. The nitrogen-containing wastewater treatment device according to claim 7, characterized in that: The reactor (1) comprises a top open structure or a reactor structure with a narrow bottom and a wide top; An observation hole (14) and a manhole (15) are arranged on the side wall of the reactor structure; and a feeding hole (16) is arranged on the top of the reactor structure.

9. The nitrogen-containing wastewater treatment device according to claim 8, characterized in that: The main controller (4.1) comprises a PLC controller; each of the detection probes (4.2) comprises a pH probe, a dissolved oxygen probe, a temperature probe, an ammonia nitrogen probe, a total nitrogen probe, a COD probe, a BOD probe and a total phosphorus probe.

10. A method for treating nitrogen-containing wastewater using the nitrogen-containing wastewater treatment device according to claim 9, characterized in that: include: Fixing the reactor (1) on the operating site via a mounting frame; The main controller (4.1) starts the water inlet assembly (3) to introduce nitrogen-containing wastewater into the reactor (1), and controls the water inlet flow rate to be 0.2 to 17 m / s. 3 / h; the main controller (4.1) starts the aeration assembly (2) to introduce air or oxygen into the reactor (1), and controls the air-water flow ratio to be 2.5-3.5; The main controller (4.1) controls the water inlet flow rate of the water inlet component (3) and the aeration flow rate of the aeration component (2) in real time according to the information detected and fed back by each of the detection probes (4.2); if the C / N ratio is lower than 4, a carbon source needs to be added to the reactor (1); The nitrogen-containing wastewater flows through the long flow path formed by the reactor (1) and the guide tube (5), and after being purified by the microbial balls (6), flows into the water collection tank (9), and flows out through the outlet pipe (11).

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