Anaerobic ammonium oxidation reactor and wastewater treatment method and treatment system

Abstract

The present invention relates to the field of sewage treatment, and specifically to an anaerobic ammonium oxidation reactor and a wastewater treatment method and treatment system. The anaerobic ammonium oxidation reactor includes a reaction tube and a plurality of aeration units. The aeration unit uses a support frame to lift the diaphragm during aeration, and the elevation of the support frame is controlled by one-way inflation into the high-pressure air pipe. Under the action of the one-way valve, the high-pressure air pipe is inflated once and used throughout the whole process. There is no need to continuously provide the energy required to lift the diaphragm during aeration, thereby reducing energy consumption, saving energy and protecting the environment. At the same time, the support frame is an umbrella-shaped structure, which can evenly support the diaphragm, ensure that the aeration micropores are effectively opened, and improve the aeration effect and aeration efficiency; further, when the support frame is reset, the gas in the high-pressure air pipe is ejected toward the diaphragm through the support frame, and the support frame rotates to knock the rubber column. The ejected gas and the vibration of the rubber column jointly cause the diaphragm to vibrate, thereby avoiding being stuck by particulate matter before it is closed, and improving the service life of the diaphragm.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and in particular to an anaerobic ammonium oxidation reactor and a wastewater treatment method and a treatment system. Background Art

[0002] In recent years, the concept of sustainable development has been vigorously advocated and people's environmental awareness has gradually increased. In order to ensure that sewage meets the water quality requirements for discharge into a certain water body or reuse, sewage needs to be effectively treated.

[0003] Anaerobic ammonium oxidation is an important process for sewage treatment. Anaerobic ammonium oxidation is a biological denitrification process that uses the process of microorganisms converting ammonia and nitrite into nitrogen. Compared with traditional denitrification processes, it has significant energy-saving and environmental protection advantages. The existing anaerobic ammonium oxidation reaction requires two types of microorganisms. The first type is ammonia oxidizing bacteria, which first converts part of the ammonia (through oxygen input) into nitrite. The second type is anaerobic ammonium oxidizing bacteria, which will convert ammonia and nitrite into nitrogen, which will then be released into the air. The above reaction requires an aeration device to be installed at the bottom of the reactor to provide ammonia oxidizing bacteria with the oxygen needed for ammonia conversion. The commonly used aeration device is a disc aerator. The disc aerator mainly uses the pressure of the gas to push open the diaphragm, thereby opening the aeration hole. However, the energy consumption of continuously opening the aeration hole using aeration gas is large, which does not meet the requirements of energy conservation and environmental protection. The article "Structural Optimization Design of Traditional Disc Microporous Membrane Aeration Discs" in the journal "Guangdong Chemical Industry" in Issue 7 of 2020 improves the traditional disc aerator by setting up an additional one-way inflation push structure to lift the diaphragm to open the micropores. It can be inflated once and used throughout the entire process. The aeration gas does not need to continuously withstand the contraction force of the membrane, thereby reducing operating resistance and energy consumption. However, the push structure in the above scheme cannot make the diaphragm open evenly when pushing the diaphragm, and thus cannot ensure the effective opening of the micropores, affecting the aeration effect and efficiency; at the same time, when the diaphragm is reset, the opened micropores gradually close and are easily blocked by solid particles, affecting the service life of the diaphragm.

[0004] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention proposes an anaerobic ammonium oxidation reactor and a wastewater treatment method and system to solve the problems of poor aeration effect and low aeration efficiency of the existing anaerobic ammonium oxidation reactor.

[0006] An anaerobic ammonium oxidation reactor of the present invention adopts the following technical scheme: comprising a reaction cylinder and a plurality of aeration units, wherein the interior of the reaction cylinder is hollow to form a water treatment chamber, a separator is arranged inside the reaction cylinder, and a purified water outlet and a sewage inlet are arranged on the side wall, wherein the sewage inlet is located at the lower end and communicates with the water treatment chamber, and the purified water outlet is located at the upper end and communicates with the separator; each aeration unit comprises:

[0007] A fixing ring connected to the bottom plate of the reaction tube;

[0008] The outer edge of the diaphragm is arranged on the fixed ring. The diaphragm is an elastic membrane and a plurality of aeration micropores are evenly opened on the diaphragm.

[0009] A support plate, the outer edge of which is arranged on the fixing ring and is located below the diaphragm, and a through hole is opened in the center of the support plate;

[0010] The gas delivery pipe and the high-pressure gas pipe are arranged at the through hole in the center of the support plate and fixed relatively to the support plate; the high-pressure gas pipe is coaxially arranged inside the gas delivery pipe and fixed relatively to the gas delivery pipe, and a gas delivery cavity is formed between the high-pressure gas pipe and the gas delivery pipe, the gas delivery cavity is connected with an aeration and inflation device, and the high-pressure gas pipe is connected with a control inflation device, and a one-way valve is arranged at the inlet of the high-pressure gas pipe, and the one-way valve only allows gas to pass through it into the high-pressure gas pipe;

[0011] The support frame includes a column and a plurality of support rods arranged on the top of the column, the plurality of support rods are evenly distributed along the circumferential direction of the column and extend in a direction away from the axis of the column, the column is inserted into the high-pressure air pipe and can slide in the up and down directions, the support rods are located between the diaphragm and the support plate, and an elastic member is arranged inside the high-pressure air pipe, and the initial elasticity makes the support frame at the lower end limit position;

[0012] The exhaust structure is used to exhaust the gas in the high-pressure air pipe, thereby allowing the support frame to reset under the action of the elastic member.

[0013] Optionally, the column and the support rod are hollow and connected inside, and the exhaust structure includes an exhaust port arranged at the bottom of the column and an air jet hole arranged on the upper side wall of the support rod, and there are multiple air jet holes that are evenly spaced along the extension direction of the support rod;

[0014] A blocking plate is arranged at the bottom of the column, and the blocking plate is configured to block the exhaust port in the initial state and the aeration state, and to open the exhaust port when the support frame is reset.

[0015] Optionally, the exhaust port is fan-shaped and two are symmetrically arranged about the center of the support frame, the blocking plate is rotatably connected to the column of the support frame, and a connecting port is arranged on the blocking plate, the connecting port is fan-shaped and two are symmetrically arranged about the center of the blocking plate, and the exhaust port and the connecting port are of the same size;

[0016] Two limit posts are provided on the outer peripheral wall of the column, and the limit posts correspond to the exhaust ports one by one. Two limit blocks are provided on the outer peripheral wall of the sealing plate, and the limit blocks correspond to the solid parts of the sealing plate located between the connecting ports one by one. Two straight grooves and two spiral grooves are provided on the inner peripheral wall of the high-pressure air pipe, and the straight grooves and the spiral grooves are connected end to end. The limit posts can slide along the straight grooves and the spiral grooves, and the limit blocks can slide along the straight grooves. The initial limit posts and the limit blocks are both located in the straight grooves on the corresponding sides.

[0017] Optionally, a rubber column is provided at the bottom of the diaphragm, and the rubber column is located at the outer edge of the diaphragm and between the diaphragm and the support plate.

[0018] Optionally, a guide groove is formed on the top surface of the support rod, and the inner end of the support rod is higher than the outer end.

[0019] Optionally, a water storage tank is formed between the inner wall of the fixing ring, the diaphragm and the support plate.

[0020] Optionally, the fixing ring is provided with a drainage hole connected to the water storage tank, and the drainage hole can be opened to drain water.

[0021] Optionally, a main air pipe is connected to the bottom of the air delivery pipe, the main air pipe is connected to the aeration and inflation device, and an auxiliary air pipe is connected to the bottom of the high-pressure air pipe, the auxiliary air pipe is connected to the control and inflation device.

[0022] An anaerobic ammonium oxidation reaction wastewater treatment system comprises the anaerobic ammonium oxidation reactor, and also comprises a pretreatment module and a post-treatment module; the pretreatment module pre-treats the sewage before the sewage enters the anaerobic ammonium oxidation reactor, and the post-treatment module post-treats the denitrified sewage after it is discharged from the anaerobic ammonium oxidation reactor.

[0023] A method for treating anaerobic ammonium oxidation reaction wastewater, using the anaerobic ammonium oxidation reaction wastewater treatment system, specifically comprises the following steps:

[0024] Step 1: pre-treat the sewage using a pre-treatment module to remove large particles of impurities and silt in the sewage, and maintain the pH value and temperature of the sewage at set values;

[0025] Step 2, passing the sewage obtained after the pretreatment in step 1 into the anaerobic ammonium oxidation reactor, adding biomass particles containing ammonia oxidizing bacteria and anaerobic ammonium oxidizing bacteria into the reaction cylinder of the anaerobic ammonium oxidation reactor, and denitrifying the sewage through aeration reaction;

[0026] Step 3, using a post-treatment module to post-treat the denitrification wastewater discharged from the anaerobic ammonium oxidation reactor so that the wastewater meets the discharge standard.

[0027] The beneficial effects of the present invention are as follows: an anaerobic ammonia oxidation reactor and a wastewater treatment method and a treatment system provided by the present invention utilize anaerobic ammonia oxidation to perform biological denitrification on sewage, and compared with traditional denitrification processes, have significant energy-saving and environmental protection advantages, wherein the aeration unit of the anaerobic ammonia oxidation reactor utilizes a support frame to lift the diaphragm during aeration, and the elevation of the support frame is controlled by one-way inflation into the high-pressure air pipe. Under the action of the one-way valve, the high-pressure air pipe is inflated once and used throughout the entire process, and there is no need to continuously provide the energy required to lift the diaphragm during aeration, thereby reducing energy consumption, saving energy and being environmentally friendly. At the same time, the support frame has an umbrella-shaped structure, which can evenly support the diaphragm, ensure that the aeration micropores are effectively opened, and improve the aeration effect and aeration efficiency.

[0028] Furthermore, when the support frame is reset, the gas in the high-pressure air pipe is ejected toward the diaphragm through the support frame, causing the diaphragm to vibrate, thus preventing it from being blocked by particles before closing, and thus increasing the service life of the diaphragm. At the same time, a rubber column is provided at the bottom of the diaphragm, and the support frame rotates and hits the rubber column when it is reset, further enhancing the vibration effect of the diaphragm; and a guide groove is provided on the support rod of the support frame, and when the support frame rotates, the water infiltrating from the aeration micropores is scraped into the guide groove and flows into the water storage tank, thus avoiding the airway pollution caused by the deposition of sewage in the airway to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic diagram of the overall structure of an anaerobic ammonium oxidation reactor of the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of an anaerobic ammonium oxidation reactor of the present invention;

[0032] Figure 3 This is a schematic structural diagram of an aeration unit in an anaerobic ammonium oxidation reactor of the present invention;

[0033] Figure 4 for Figure 3 Exploded diagram of

[0034] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0035] Figure 6 is a cross-sectional view of an aeration unit;

[0036] Figure 7It is a schematic diagram of the structure of the support frame in the aeration unit;

[0037] Figure 8 It is a structural schematic diagram of the sealing ring plate in the aeration unit;

[0038] Fig. 9 Schematic diagram of the structure of the high-pressure air pipe in the aeration unit.

[0039] In the figure:

[0040] 100, reaction cylinder; 101, purified water outlet; 102, sewage inlet; 104, water treatment chamber; 105, separator; 1051, water inlet;

[0041] 200, aeration unit;

[0042] 203, diaphragm; 2031, rubber column; 2032, aeration micropores;

[0043] 204, support frame; 2041, exhaust port; 2042, rotation connection hole; 2043, limit column; 2044, guide groove; 2045, air jet hole;

[0044] 205, support plate; 2051, water tank;

[0045] 206, blocking plate; 2061, rotating connecting column; 2062, limiting block; 2063, connecting port;

[0046] 207, elastic member;

[0047] 208, high pressure gas pipe; 2081, spiral groove; 2082, straight groove; 2084, mounting hole; 2085, threaded hole;

[0048] 209, gas pipe; 2091, fixing screw;

[0049] 210, fixing ring; 2101, first mounting groove; 2102, second mounting groove;

[0050] 211. Auxiliary trachea; 212. Main trachea. DETAILED DESCRIPTION

[0051] The following will be combined with the 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 without making creative work are within the scope of protection of the present invention.

[0052] like Figures 1 to 9As shown, an anaerobic ammonium oxidation reactor provided by an embodiment of the present invention includes a reaction tube 100 and a plurality of aeration units 200. The reaction tube 100 is hollow inside to form a water treatment chamber 104. A separator 105 is arranged inside the reaction tube 100, and a purified water outlet 101 and a sewage inlet 102 are arranged on the side wall. The sewage inlet 102 is located at the lower end and connected to the water treatment chamber 104, and is used to pass sewage into the water treatment chamber 104. The purified water outlet 101 is located at the upper end and connected to the separator 105, and is used to discharge purified water. Each aeration unit 200 includes:

[0053] A fixing ring 210 connected to the bottom plate of the reaction tube 100;

[0054] The outer edge of the diaphragm 203 is arranged on the fixing ring 210. The diaphragm 203 is an elastic membrane. A plurality of aeration micropores 2032 are evenly formed on the diaphragm 203. It can be understood that, because the diaphragm 203 is an elastic membrane, in the initial state, the aeration micropores 2032 are basically in a closed state under the elastic force of the diaphragm 203 itself;

[0055] The support plate 205, whose outer edge is arranged on the fixing ring 210 and is located below the diaphragm 203, has a through hole in the center of the support plate 205; to facilitate the installation of the diaphragm 203 and the support plate 205, the inner peripheral wall of the fixing ring 210 is provided with a first installation groove 2101 and a second installation groove 2102, the diaphragm 203 is arranged in the first installation groove 2101, and the support plate 205 is arranged in the second installation groove 2102;

[0056] The air delivery pipe 209 and the high-pressure air pipe 208, the air delivery pipe 209 is arranged at the through hole in the center of the support plate 205 and is relatively fixed to the support plate 205; the high-pressure air pipe 208 is coaxially arranged inside the air delivery pipe 209 and is relatively fixed to the air delivery pipe 209, and an air delivery cavity is formed between the high-pressure air pipe 208 and the air delivery pipe 209, and the air delivery cavity is connected to an aeration and inflation device (not shown in the figure), and the high-pressure air pipe 208 is connected to a control inflation device (not shown in the figure), and a one-way valve is arranged at the inlet of the high-pressure air pipe 208 (not shown in the figure), the one-way valve only allows the gas of the control inflation device to enter the high-pressure air pipe 208 through it; for easy assembly, a mounting hole 2084 is opened at the bottom center of the high-pressure air pipe 208, and the one-way valve is arranged in the mounting hole 2084; the outer peripheral wall of the high-pressure air pipe 208 is provided with a connecting tube, and a threaded hole 2085 is opened at the center of the connecting tube, and a fixing screw 2091 is provided on the side wall of the air delivery pipe 209, and the fixing screw 2091 is inserted into the threaded hole 2085 and is threadedly connected with the threaded hole 2085;

[0057] The support frame 204 includes a column and a plurality of support rods arranged on the top of the column. The plurality of support rods are evenly distributed along the circumferential direction of the column and extend in a direction away from the axis of the column. The column is inserted into the high-pressure air pipe 208 and can slide in the up and down directions. The support rods are located between the diaphragm 203 and the support plate 205. An elastic member 207 is arranged inside the high-pressure air pipe 208. The initial elasticity makes the support frame 204 in the lower end limit position.

[0058] The exhaust structure is used to exhaust the gas in the high-pressure gas pipe 208, thereby restoring the support frame 204.

[0059] When in use, sewage is passed into the water treatment chamber 104 through the sewage inlet 102, and biomass particles containing ammonia oxidizing bacteria and anaerobic ammonia oxidizing bacteria are added into the water treatment chamber 104; then the control aeration device is turned on to control the airflow of the aeration device along the Figure 6 The direction of the arrow C in the middle enters the high-pressure air pipe 208 through the one-way valve at the bottom of the high-pressure air pipe 208, and pushes the support frame 204 to move upward. After the support frame 204 moves upward, it gradually lifts up the diaphragm 203, the diaphragm 203 expands, and the aeration micropores 2032 are stretched open. At the same time, the airflow of the aeration and inflation device moves along Figure 6 The direction of the arrow B in the middle enters the water treatment chamber 104 through the aeration micropores 2032, thereby starting the aeration process. During the aeration process, the aeration gas stirs the biomass particles on the bottom plate to fully mix them with the sewage. At this time, the ammonia oxidizing bacteria on the outer layer of the biomass particles react ammonia with oxygen to generate a part of nitrite. Subsequently, the anaerobic ammonia oxidizing bacteria on the inner layer of the biomass particles react the nitrite generated in the previous step with the remaining unreacted ammonia in the previous step to finally generate nitrogen. The upper end of the separator 105 is open, and the product nitrogen will float up and leave the separator 105. The separator 105 is provided with a water inlet 1051. The sewage after denitrification enters the separator 105 through the water inlet 1051. In the separator 105, the biomass particles are filtered and finally returned to the water treatment chamber 104, while the liquid is discharged through the purified water outlet 101 and finally reaches the next treatment process. When the work is finished, the aeration and inflation device stops working, and the gas in the high-pressure air pipe 208 is discharged through the exhaust structure. Under the elastic force of the elastic member 207, the support frame 204 is reset downward, and the diaphragm 203 is retracted and reset. The present invention lifts up the diaphragm 203 by setting the support frame 204, and the rise of the support frame 204 is controlled by one-way inflation into the high-pressure air pipe 208. Under the action of the one-way valve, the high-pressure air pipe 208 is used for the whole process of inflation once, and there is no need to continuously provide the energy required to lift up the diaphragm 203 during aeration, thereby reducing energy consumption, saving energy and protecting the environment. At the same time, the support frame 204 is an umbrella-shaped structure, which can evenly prop up the diaphragm 203, ensure that the aeration micropores 2032 are effectively opened, and improve the aeration effect and aeration efficiency. Further, the support rod is curved in an arc shape, so that the diaphragm 203 can be opened more evenly to avoid stress concentration.

[0060] In one of the embodiments, the exhaust structure is configured to include an exhaust hole, and the exhaust hole is arranged on the side wall of the high-pressure air pipe 208. The column blocks the exhaust hole in the initial state and the aeration state; when exhausting, gas continues to be introduced into the high-pressure air pipe 208, so that the air pressure in the high-pressure air pipe 208 continues to increase to a certain value, the support frame 204 continues to move upward for a distance, the column opens the exhaust hole, the gas in the high-pressure air pipe 208 is discharged through the exhaust hole, and the support frame 204 is reset under the action of the elastic member 207.

[0061] In another preferred embodiment, the column and the strut are hollow and connected inside, and the exhaust structure includes an exhaust port 2041 arranged at the bottom of the column and an air jet hole 2045 arranged on the upper side wall of the strut, and there are multiple air jet holes 2045 and they are evenly spaced along the extension direction of the strut; a blocking plate 206 is arranged at the bottom of the column, and the blocking plate 206 is configured to block the exhaust port 2041 in the initial state and the aeration state, and the exhaust port 2041 is opened when the support frame 204 is reset. By setting the support frame 204 as a hollow structure, after the aeration is completed, the exhaust port 2041 at the bottom of the support frame 204 is opened, and the gas in the high-pressure gas pipe 208 enters the inside of the support frame 204 through the exhaust port 2041 and is ejected from the air jet hole 2045. The gas ejected from the air jet hole 2045 impacts the diaphragm 203 to vibrate it, thereby preventing the aeration micropores 2032 from being blocked by particles before they are closed, and improving the service life of the diaphragm 203.

[0062] In a further embodiment, the exhaust port 2041 is fan-shaped, and two are symmetrically arranged about the center of the support frame 204, and the sealing plate 206 is rotatably connected to the column of the support frame 204. Specifically, a rotating connection hole 2042 is opened at the center of the bottom of the column of the support frame 204, and a rotating connection column 2061 is arranged at the center of the sealing plate 206. The rotating connection column 2061 is rotatably arranged in the rotating connection hole 2042, and a connecting port 2063 is arranged on the sealing plate 206. The connecting port 2063 is fan-shaped and two are symmetrically arranged about the center of the sealing plate 206, and the exhaust port 2041 and the connecting port 2063 are the same size.

[0063] The outer wall of the column is provided with two limit columns 2043, and the limit columns 2043 correspond to the exhaust ports 2041 one by one. The outer wall of the blocking plate 206 is provided with two limit blocks 2062, and the limit blocks 2062 correspond to the entity parts of the blocking plate 206 located between the connecting ports 2063 one by one; the inner wall of the high-pressure air pipe 208 is provided with two straight grooves 2082 and two spiral grooves 2081, and the straight grooves 2082 and the spiral grooves 2081 are connected end to end. The limit columns 2043 can slide along the straight grooves 2082 and the spiral grooves 2081, and the limit blocks 2062 can slide along the straight grooves 2082. Initially, the limit columns 2043 and the limit blocks 2062 are both located in the straight grooves 2082 on the corresponding sides, that is, the limit columns 2043 and the limit blocks 2062 are aligned, and the entity part of the blocking plate 206 blocks the exhaust port 2041.

[0064] It is further necessary to explain that the upper end of the elastic member 207 is connected to the blocking plate 206, and the lower end is connected to the inner bottom of the high-pressure air pipe 208. The elastic member 207 is preferably a spring, and more preferably a tension spring. After the high-pressure air pipe 208 is inflated, the pressure inside the high-pressure air pipe 208 increases, and the blocking plate 206 and the support frame 204 overcome the pulling force of the elastic member 207 under the action of the air pressure and move upward along the straight groove 2082. The upper end of the support frame 204 gradually lifts up the diaphragm 203, and the aeration micropores 2032 are opened. When the work is finished, the air pressure inside the high-pressure air pipe 208 is first increased a little, and the support frame 204 continues to move up a distance. A guide slope is set at the top of the straight groove 2082. The limit column 2043 on the support frame 204 continues to move upward until it contacts the guide slope, and then enters the spiral groove 2081 under the action of the guide slope. At the same time, due to the elastic force of the elastic member 207, the limit column 2043 moves downward along the spiral groove 2081, the limit block 2062 moves downward along the straight groove 2082, the support frame 204 and the sealing plate 206 move downward, and the support frame 204 and the sealing plate 206 move downward. The support frame 204 rotates relative to the blocking plate 206, and the exhaust port 2041 gradually aligns with the connecting port 2063. The gas in the high-pressure gas pipe 208 enters the support frame 204 through the connecting port 2063 and the exhaust port 2041 and is ejected from the jet hole 2045. The exhausted gas impacts the diaphragm 203 to make it vibrate. At the same time, with the rotation of the support frame 204, the diaphragm 203 vibrates more evenly. Under the uniform vibration of the diaphragm 203, the particles move to the edge of the diaphragm 203, further avoiding the aeration micropores 2032 from being blocked by particles before they are closed. When the limit block 2062 moves to the bottom of the straight groove 2082, the limit block 2062 moves to the bottom of the spiral groove 2081 and enters the opposite straight groove 2082, and the blocking plate 206 blocks the exhaust port 2041 again.

[0065] In a further embodiment, a rubber column 2031 is provided at the bottom of the diaphragm 203. The rubber column 2031 is located at the outer edge of the diaphragm 203 and between the diaphragm 203 and the support plate 205. The support frame 204 continuously hits the rubber column 2031 during the rotation and reset process, so that the diaphragm 203 vibrates. The rubber column 2031 and the air jet hole 2045 work together to make the diaphragm 203 vibrate, thereby enhancing the vibration effect of the diaphragm 203 and further reducing the risk of the aeration micropores 2032 being blocked by particulate matter before they are closed.

[0066] In a further embodiment, a guide groove 2044 is formed on the top surface of the support rod, the inner end of the support rod is higher than the outer end, and a water storage tank 2051 is formed between the inner wall of the fixing ring 210, the diaphragm 203 and the support plate 205. During the rotation and reset process of the support frame 204, the water infiltrated from the aeration micropores 2032 is scraped into the guide groove 2044 and flows along the Figure 7 The water flows to the water storage tank 2051 in the direction of middle D, which avoids the airway pollution caused by the deposition of sewage in the airway to a certain extent. Further, the fixing ring 210 is provided with a drainage hole (not shown in the figure) connected to the water storage tank 2051, and the drainage hole can be opened to drain water.

[0067] Furthermore, in order to facilitate the gas supply to the gas supply cavity and the high-pressure gas pipe 208, the bottom of the gas supply pipe 209 is connected to a main gas pipe 212, which is connected to the aeration and inflation device. To optimize the structure, the main gas pipes 212 of all aeration units 200 are connected to the aeration and inflation device. The bottom of the high-pressure gas pipe 208 is connected to an auxiliary gas pipe 211, which is connected to the control inflation device.

[0068] The present invention also provides an anaerobic ammonium oxidation wastewater treatment system, which includes the above-mentioned anaerobic ammonium oxidation reactor, and also includes a pretreatment module and a post-treatment module; the pretreatment module pre-treats the sewage before the sewage enters the anaerobic ammonium oxidation reactor, which mainly includes screen slag removal, grit tank sedimentation and regulating tank regulation, etc., aiming to remove large particle impurities and silt in the sewage and adjust the pH value and temperature of the sewage to meet the requirements of the anaerobic ammonium oxidation process; the post-treatment module post-treats the denitrified sewage after it is discharged from the anaerobic ammonium oxidation reactor, including sedimentation, filtration and disinfection, etc., aiming to further remove residual suspended matter and microorganisms to ensure that the effluent meets the emission standards.

[0069] The present invention also provides an anaerobic ammonium oxidation wastewater treatment method, which uses the above-mentioned anaerobic ammonium oxidation wastewater treatment system and mainly includes the following steps:

[0070] Step 1, pre-treating the sewage using the above-mentioned pre-treatment module to remove large particles of impurities and silt in the sewage, and maintaining the pH value of the sewage at 6.7-8.3, preferably 7, and controlling the temperature of the sewage at 30-45 degrees Celsius to ensure that the index parameters of the sewage meet the requirements of the anaerobic ammonium oxidation process;

[0071] Step 2, passing the sewage obtained after the pretreatment in step 1 into an anaerobic ammonium oxidation reactor, adding biomass particles containing ammonia oxidizing bacteria and anaerobic ammonium oxidizing bacteria into the reaction cylinder 100 of the anaerobic ammonium oxidation reactor, and performing aeration reaction to denitrify the sewage; during the reaction, the ammonia oxidizing bacteria first oxidizes about 53% of the ammonia into nitrite, and then the anaerobic ammonium oxidizing bacteria converts 53% of the nitrite and the remaining 47% of ammonia into nitrogen gas;

[0072] Step 3, using the above-mentioned post-treatment module to perform post-treatment such as sedimentation, filtration, and disinfection on the denitrification wastewater discharged from the anaerobic ammonium oxidation reactor to further remove residual suspended matter and microorganisms so that the wastewater meets the discharge standards.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An anaerobic ammonium oxidation reactor, characterized in that: It includes a reaction cylinder and a plurality of aeration units. The interior of the reaction cylinder is hollow to form a water treatment chamber. A separator is arranged inside the reaction cylinder. A purified water outlet and a sewage inlet are arranged on the side wall. The sewage inlet is located at the lower end and communicates with the water treatment chamber. The purified water outlet is located at the upper end and communicates with the separator. Each aeration unit includes: A fixing ring connected to the bottom plate of the reaction tube; The outer edge of the diaphragm is arranged on the fixed ring. The diaphragm is an elastic membrane and a plurality of aeration micropores are evenly opened on the diaphragm. A support plate, the outer edge of which is arranged on the fixing ring and is located below the diaphragm, and a through hole is opened in the center of the support plate; The gas delivery pipe and the high-pressure gas pipe are arranged at the through hole in the center of the support plate and fixed relatively to the support plate; the high-pressure gas pipe is coaxially arranged inside the gas delivery pipe and fixed relatively to the gas delivery pipe, and a gas delivery cavity is formed between the high-pressure gas pipe and the gas delivery pipe, the gas delivery cavity is connected with an aeration and inflation device, and the high-pressure gas pipe is connected with a control inflation device, and a one-way valve is arranged at the inlet of the high-pressure gas pipe, and the one-way valve only allows gas to pass through it into the high-pressure gas pipe; The support frame includes a column and a plurality of support rods arranged on the top of the column, the plurality of support rods are evenly distributed along the circumferential direction of the column and extend in a direction away from the axis of the column, the column is inserted into the high-pressure air pipe and can slide in the up and down directions, the support rods are located between the diaphragm and the support plate, and an elastic member is arranged inside the high-pressure air pipe, and the initial elasticity makes the support frame at the lower end limit position; An exhaust structure is used to exhaust the gas in the high-pressure air pipe, thereby allowing the support frame to reset under the action of the elastic member; The column and the support rod are hollow and connected inside, and the exhaust structure includes an exhaust port arranged at the bottom of the column and an air jet hole arranged on the upper side wall of the support rod, and there are multiple air jet holes that are evenly spaced along the extension direction of the support rod; A blocking plate is provided at the bottom of the column, and the blocking plate is configured to block the exhaust port in the initial state and the aeration state, and to open the exhaust port when the support frame is reset; The exhaust port is fan-shaped and two are symmetrically arranged about the center of the support frame. The blocking plate is rotatably connected to the column of the support frame. The blocking plate is provided with a connecting port. The connecting port is fan-shaped and two are symmetrically arranged about the center of the blocking plate. The exhaust port and the connecting port are of the same size. Two limit columns are provided on the outer peripheral wall of the column, and the limit columns correspond to the exhaust ports one by one. Two limit blocks are provided on the outer peripheral wall of the sealing plate, and the limit blocks correspond to the solid parts of the sealing plate located between the connecting ports one by one. Two straight grooves and two spiral grooves are provided on the inner peripheral wall of the high-pressure air pipe, and the straight grooves and the spiral grooves are connected end to end. A guide inclined surface is provided on the top of the straight groove. The limit columns can slide along the straight grooves and the spiral grooves, and the limit blocks can slide along the straight grooves. The initial limit columns and the limit blocks are both located in the straight grooves on the corresponding sides.

2. An anaerobic ammonium oxidation reactor according to claim 1, characterized in that: A rubber column is arranged at the bottom of the diaphragm, and the rubber column is located at the outer edge of the diaphragm and between the diaphragm and the support plate.

3. The anaerobic ammonium oxidation reactor according to claim 1, characterized in that: A guide groove is formed on the top surface of the support rod, and the inner end of the support rod is higher than the outer end.

4. The anaerobic ammonium oxidation reactor according to claim 3, characterized in that: A water storage tank is formed between the inner wall of the fixing ring, the diaphragm and the supporting plate.

5. The anaerobic ammonium oxidation reactor according to claim 4, characterized in that: The fixing ring is provided with a drainage hole connected to the water storage tank, and the drainage hole can be opened to drain water.

6. The anaerobic ammonium oxidation reactor according to claim 1, characterized in that: The bottom of the air delivery pipe is connected with a main air pipe, which is connected with the aeration and inflation device. The bottom of the high-pressure air pipe is connected with an auxiliary air pipe, which is connected with the control and inflation device.

7. An anaerobic ammonium oxidation wastewater treatment system, characterized in that: The anaerobic ammonium oxidation reactor comprises the anaerobic ammonium oxidation reactor as described in any one of claims 1 to 6, and further comprises a pretreatment module and a post-treatment module; the pretreatment module pre-treats the sewage before the sewage enters the anaerobic ammonium oxidation reactor, and the post-treatment module post-treats the denitrified sewage after it is discharged from the anaerobic ammonium oxidation reactor.

8. A method for treating anaerobic ammonium oxidation wastewater, characterized in that: The anaerobic ammonium oxidation reaction wastewater treatment system according to claim 7 is used, specifically comprising the following steps: Step 1: pre-treat the sewage using a pre-treatment module to remove large particles of impurities and silt in the sewage, and maintain the pH value and temperature of the sewage at set values; Step 2, passing the sewage obtained after the pretreatment in step 1 into the anaerobic ammonium oxidation reactor, adding biomass particles containing ammonia oxidizing bacteria and anaerobic ammonium oxidizing bacteria into the reaction cylinder of the anaerobic ammonium oxidation reactor, and denitrifying the sewage through aeration reaction; Step 3, using a post-treatment module to post-treat the denitrification wastewater discharged from the anaerobic ammonium oxidation reactor so that the wastewater meets the discharge standard.

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