CN116675343A - AAO sewage treatment plant based on anaerobic ammonia oxidation - Google Patents

Abstract

The invention provides an AAO sewage treatment device based on anaerobic ammonium oxidation, comprising a treatment box, the inside of which is divided into anaerobic reaction chamber, anoxic reaction chamber, aerobic reaction chamber and precipitation chamber, anaerobic reaction chamber, There are two pneumatic agitators at the center of the bottom wall of the anoxic reaction chamber and the aerobic reaction chamber, and an adjustable biofilm hanger is installed in the anaerobic reaction chamber and anoxic reaction chamber. The hanger includes a drive device that realizes the contraction of both ends of the fork-type telescopic frame to the center. The pneumatic agitator of the present invention is all arranged at the bottom of the reaction chamber, which will not affect the installation of the biofilm; the biofilm hanger with adjustable spacing will move closer to the middle when the pneumatic agitator is running, and its turbid sewage It can fully contact with the anaerobic bacteria on the bio-film to effectively improve the sewage treatment effect; when the pneumatic agitator is not in operation, the bio-film can be separated from each other under the action of the drive unit to ensure the sewage treatment effect.

Description

A kind of AAO sewage treatment device based on anaerobic ammonium oxidation

technical field

The invention relates to the technical field of water treatment, in particular to an AAO sewage treatment device based on anaerobic ammonium oxidation.

Background technique

Anaerobic ammonium oxidation is a new type of biological nitrogen removal technology. Under anaerobic conditions, anammox bacteria use nitrite as an electron acceptor to oxidize ammonia nitrogen into nitrogen. The current anammox technology It has been effectively used in the field of sewage treatment. The combination of anaerobic ammonium oxidation technology and AAO sewage treatment technology not only realizes the effective treatment of sewage, but also effectively reduces the operating cost compared with traditional AAO sewage treatment technology.

The invention patent with the application number 2020108884561 discloses an AAO process modification method for urban sewage treatment plants based on anaerobic ammonium oxidation. The reaction device disclosed in the invention patent has good nitrogen removal performance, but there are still some unreasonable designs. The reaction device is equipped with an agitator in the anaerobic reactor, anoxic reactor, and aerobic reactor, which not only leads to an increase in equipment operating costs, but more importantly, the presence of the agitator cannot make the anaerobic reactor, anoxic reactor Bio-hanging film is set in the reactor, which reduces the sewage treatment effect.

Contents of the invention

The purpose of the present invention is to provide an AAO sewage treatment device based on anaerobic ammonium oxidation, which solves the problem that the agitator and biofilm cannot be designed simultaneously in the existing AAO process coupling anaerobic ammonium oxidation reaction device.

According to an object of the present invention, the present invention provides a kind of AAO sewage treatment device based on anaerobic ammonium oxidation, comprises treatment box and control cabinet, and the interior of described treatment box is divided into anaerobic treatment box successively from left to right by several clapboards. Reaction chamber, anoxic reaction chamber, aerobic reaction chamber and precipitation chamber, the first overflow port, second overflow port and overflow pipe are respectively arranged on the said dividing plate from left to right, said anaerobic reaction chamber The outer wall of the chamber is provided with a water inlet pipe, the outer wall of the settling chamber is provided with a clear water discharge pipe, and the center of the bottom wall of the anaerobic reaction chamber, the anoxic reaction chamber, and the aerobic reaction chamber are all provided with There are two pneumatic agitators, and the pneumatic agitators are arranged in series through air pipes. An air compressor is arranged on the outer side of the treatment box, and the air compressor is connected to the first one in the anaerobic reaction chamber. The pneumatic agitator is connected, and an aeration head is arranged on the air pipe of the aerobic reaction chamber;

Both the anaerobic reaction chamber and the anoxic reaction chamber are provided with adjustable spacing biofilm hangers, and the adjustable spacing biofilm hangers include The horizontal chute on the two side walls of the chamber, two aligned fork-type telescopic frames are arranged between the two horizontal chutes, and each center crossing position of the two fork-type telescopic frames is provided with a horizontal rod, both ends of the cross bar are provided with sliders that extend into the horizontal chute, and each of the cross bars is provided with a plurality of bio-hanging films at intervals, and the distance adjustable bio-film hanger It also includes a driving device for realizing the contraction of the two ends of the fork-type telescopic frame to the center.

Further, the driving device includes screw nuts connected to the frontmost and rearmost cross bars, two screw nuts are threaded with two-way screw rods, and one end of the two-way screw rods is connected with a wire pole motor.

Further, the pneumatic agitator includes a bracket and a disk casing, the disk casing is connected to the upper end of the bracket, and a rotating shaft extending into the bracket is connected concentrically in the disk casing, and is located in the circle. The rotating shaft inside the disk housing is provided with air vanes, the lower end of the rotating shaft is connected to the stirring blade in the bracket, and the circumferential surface of the disc housing is connected with two tangent lines connected to the air pipe. Tube.

Further, a sealed bearing cooperating with the rotating shaft is provided at the joint between the disk shell and the bracket.

Further, the air outlet of the air compressor is connected with a three-way valve, and the air compressor is respectively connected with the air pipes in the anaerobic reaction chamber and the aerobic reaction chamber through the three-way valve.

Further, a bio-sludge retaining mechanism is provided on the partition at the second overflow port, and the bio-sludge retention mechanism includes a filter cover connected to the partition, and the second overflow port It is arranged in communication with the filter cover, and a filter hole is opened at the lower end of the filter cover.

Further, the upper and lower ends of the filter cover are provided with belt rollers, and one end of the belt roller at the upper end is connected with a drive motor, and a mud scraping belt is arranged between the two belt rollers, and the mud scraping belt A plurality of mud scrapers are connected at equal intervals on the outer surface.

Further, a sludge return port is opened on the partition above the second overflow port, and a mud return plate is inserted obliquely in the sludge return port, and the end of the mud return plate is provided with a stopper. A pressing protrusion, a spring is arranged between the pressing protrusion and the partition plate, and a cam that acts on the pressing protrusion is arranged on the roller shaft of the belt roller at the upper end.

Further, a settling hopper is provided inside the settling chamber, the overflow pipe extends into the upper opening of the settling hopper, and the lower end of the settling hopper is connected with a sludge auger protruding from the treatment box conveyor.

Further, the anaerobic reaction chamber, the anoxic reaction chamber, and the aerobic reaction chamber are all provided with online pH monitors and temperature detection and control devices.

The pneumatic agitator of the technical solution of the present invention is all arranged at the bottom of the reaction chamber, which will not affect the installation of biofilm in the anaerobic reaction chamber and anoxic reaction chamber; the biofilm hanger with adjustable spacing is used for biofilm hanging when the pneumatic agitator is running It will move closer to the middle, and the turbid sewage can fully contact with the anaerobic bacteria on the bio-film during stirring, which effectively improves the effect of sewage treatment; when the pneumatic agitator is not in operation, multiple bio-films They can also be separated from each other under the action of the driving unit, covering the entire anaerobic reaction chamber or anoxic reaction chamber, so as to ensure the sewage treatment effect at each position in the treatment chamber.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the front three-dimensional structure schematic diagram of the present invention;

Fig. 2 is a schematic diagram of the back stereoscopic structure of the present invention;

Fig. 3 is a schematic diagram of the first state structure inside the processing box in the present invention;

Fig. 4 is the second state structure schematic diagram inside the processing box in the present invention;

Fig. 5 is a schematic diagram of the top view internal plane structure in Fig. 4 of the present invention;

Fig. 6 is the schematic diagram of the three-dimensional structure of the intermediate distance adjustable biofilm hanger of the present invention;

Fig. 7 is the schematic diagram of the three-dimensional structure of the pneumatic agitator in the present invention;

Fig. 8 is the schematic diagram of the three-dimensional cross-sectional structure of the pneumatic agitator in the present invention;

Fig. 9 is a schematic diagram of the three-dimensional structure of the bio-sludge retaining mechanism in the present invention.

Among the figure: 1, treatment box; 101, anaerobic reaction chamber; 102, anoxic reaction chamber; 103, aerobic reaction chamber; 104, sedimentation chamber; 105, water inlet pipe; 106, clear water discharge pipe;

2. Control cabinet; 3. Air compressor; 4. The first partition; 401. The first overflow port;

5. The second partition; 501, the second overflow port; 502, the sludge return port;

6. The third partition; 601. Overflow pipe;

7. Pneumatic agitator; 701, bracket; 702, disk shell; 703, tangential pipe; 704, rotating shaft; 705, sealed bearing; 706, air wheel blade; 707, stirring blade;

8. The first air pipe; 9. The second air pipe; 10. The third air pipe; 11. Three-way valve; 12. The first air intake pipe; 13. The second air intake pipe; 14. Aeration head; 15. Adjustable distance biological Membrane hanger; 151, horizontal chute; 152, fork-type telescopic frame; 153, crossbar; 154, slider; 155, screw nut; 156, two-way screw; 157, screw motor; 158, biological film ;

16. Sedimentation bucket; 17. Bio-sludge retaining mechanism; 171. Filter cover; 172. Belt roller; 173. Scraper belt; 174. Scraper; ; 178, drive motor; 179, cam;

18. Sludge auger conveyor.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In describing the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", etc. or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined. In addition, the terms "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it can be fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be It can be directly connected, or indirectly connected through an intermediary, and can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Example 1

As shown in FIGS. 1-4 , an AAO sewage treatment device based on anaerobic ammonium oxidation includes a treatment box 1 , a control cabinet 2 and an air compressor 3 . Inside the processing box 1, a first partition 4, a second partition 5 and a third partition 6 are successively arranged from left to right, and the first partition 4, the second partition 5 and the third partition 6 will The interior of the treatment box 1 is divided into anaerobic reaction chamber 101 , anoxic reaction chamber 102 , aerobic reaction chamber 103 and precipitation chamber 104 from left to right. The anaerobic reaction chamber 101, the anoxic reaction chamber 102, and the aerobic reaction chamber 103 are provided with online pH monitors and temperature detection and control devices, all of which belong to the prior art and are not shown in this embodiment.

A water inlet pipe 105 is provided on the outer side wall of the anaerobic reaction chamber 101, a first overflow port 401 is provided on the first partition plate 4, a second overflow port 501 is provided on the second partition plate 5, and A row of overflow pipes 601 is arranged on the third partition 6 , and the horizontal heights of the water inlet pipe 105 , the first overflow port 401 , the second overflow port 501 and the overflow pipe 601 are gradually lowered. In the sewage treatment process, the sewage enters the anaerobic reaction chamber 101 by the water inlet pipe 105, and then enters the anoxic reaction chamber 102 through the first overflow port 401, so that the sewage is formed in the anaerobic reaction chamber 101 and the anoxic reaction chamber 102. Anammox bacteria and denitrifying bacteria denitrify, and the denitrified sewage enters the aerobic reaction chamber 103, and aerobic bacteria are used to dephosphorize the sewage under the action of aeration, and finally the treated sewage Enter into the precipitation chamber 104 through the overflow pipe 601 for precipitation, and the clear water after precipitation can be discharged directly.

As shown in Figure 3 and Figure 5, two pneumatic agitators 7 are all arranged at the bottom wall center of anaerobic reaction chamber 101, anoxic reaction chamber 102, aerobic reaction chamber 103, and in anaerobic reaction chamber 101, The first trachea 8 is connected between the two pneumatic agitators 7 in the anoxic reaction chamber 102 and the aerobic reaction chamber 103, and the two pneumatic agitators 7 in the anaerobic reaction chamber 101 and the anoxic reaction chamber 102 The second air pipe 9 is connected, and the third air pipe 10 is connected between the two pneumatic stirrers 7 of the anoxic reaction chamber 102 and the aerobic reaction chamber 103 . The outlet end of the air compressor 3 is connected with a three-way valve 11, the three-way valve 11 is connected with the first air inlet pipe 12 and the second air inlet pipe 13, and connects the end of the first air inlet pipe 12 with the anaerobic reaction chamber 101. The first pneumatic stirrer 7 is connected, and the second air inlet pipe 13 is connected with the third air pipe 10 in the aerobic reaction chamber 103, and a plurality of Aeration head 14. Through the above-mentioned structural design, when it is necessary to stir in the anaerobic reaction chamber 101 and the anoxic reaction chamber 102 to improve the sewage treatment efficiency, the first air inlet pipe 12 is connected by controlling the three-way valve 11, and then the air compressor 3 is started so that The compressed gas enters the pneumatic agitator 7 in the anaerobic reaction chamber 101, the anoxic reaction chamber 102, and the aerobic reaction chamber 103 in sequence, and utilizes the effect of the pneumatic agitator 7 to stir the sewage in the treatment process, and finally the compressed air flows from the The aeration head 14 in the aerobic reaction chamber 103 is discharged to realize the aeration effect.

As shown in Figures 7 and 8, the pneumatic agitator 7 includes a bracket 701 and a disk casing 702, the disk casing 702 is fixedly installed on the upper end of the bracket 701, and two tangential pipes 703 are connected on the circumference of the disk casing 702 , so that the compressed air sent in the air pipe can enter or be sent out of the disk shell 702 along the tangential direction. A rotating shaft 704 is concentrically connected to the disc housing 702, and the joint between the bracket 701 and the disc housing 702 is provided with a sealed bearing 705 suitable for the rotating shaft 704, and the rotating shaft 704 inside the disc housing 702 is provided with gas vanes. 706, and a plurality of stirring blades 707 are arranged at the lower end of the rotating shaft 704 protruding from the disk casing 702. The structural design of the above-mentioned pneumatic agitator 7 can use the high-pressure gas introduced as the power source to make it act on the gas vane 706 to make the rotating shaft 704 rotate, and then the processing process can be controlled by the stirring blade 707 at the lower end during the rotating process of the rotating shaft 704. The sewage in the tank is stirred to improve the efficiency of sewage treatment.

As shown in Figure 3 and Figure 6,

Both the anaerobic reaction chamber 101 and the anoxic reaction chamber 102 are provided with adjustable spacing biofilm hangers 15, and the adjustable spacing biofilm hangers 15 include the two sides of the anaerobic reaction chamber 101 or anoxic reaction chamber 102. The horizontal chute 151 at the upper end is provided with two fork-type telescopic frames 152 aligned left and right between the two horizontal chute 151, and a cross bar is provided at each central intersection position of the two fork-type telescopic frames 152 153, and the two ends of each cross bar 153 are provided with sliders 154 matching the horizontal chute 151. Screw nuts 155 are fixedly connected to the two cross bars 153 at the front end and rear end, and the two screw nuts 155 are on the same straight line. Then a two-way screw mandrel 156 is screwed between the two screw mandrel nuts 155, and the helical direction at two ends of the two-way screw mandrel 156 is oppositely set, and the outer surface of the processing box 1 is provided with a screw mandrel connected with the two-way screw mandrel 156 Motor 157. Finally, a plurality of biohanging films 158 are arranged at intervals along the left and right directions on each cross bar 153 . The structural design of the distance-adjustable biofilm hanger 15 in this embodiment makes it possible to start the screw motor 157 and utilize the transmission between the two-way screw 156 and the screw nut 155 before the pneumatic agitator 7 is in operation, so that all The cross bar 153 draws closer to the center under the effect of the fork type telescopic frame 152. When all crossbars 153 were close to each other to the shortest distance, the biohanging film 158 on the crossbars 153 was all close together and positioned directly above the pneumatic agitator 7, and now the stirring action of the pneumatic agitator 7 to the center sewage could be The contact effect between the sewage and the anammox bacteria and nitrifying bacteria on the biofilm is greatly improved, so that the anaerobic bacteria in the anaerobic reaction chamber 101 and the anoxic reaction chamber 102 can achieve the best sewage treatment efficiency. And when the anaerobic reaction chamber 101 and the anoxic reaction chamber 102 are carrying out normal sewage treatment, reversely start the screw motor 157, make all cross bars 153 all move away from each other, thereby make the biofilm on the cross bar 153 158 covers the entire anaerobic reaction chamber 101 or anoxic reaction chamber 102.

As shown in Figures 3 and 4, the inside of the settling chamber 104 is provided with a settling bucket 16, and a row of overflow pipes 601 on the third dividing plate 6 all extend into the upper end opening of the settling bucket 16, and then the settling bucket 16 The lower end of the sludge auger conveyor 18 is connected, and the discharge end of the sludge auger conveyor 18 stretches out from the rear side of the settling chamber 104, and the lower end of the settling chamber 104 is provided with a clear water discharge pipe 106. The above-mentioned treatment liquid after the treatment is sent to the settling bucket 16 through the overflow pipe 601 for precipitation, and the clear water after the precipitation flows down from the upper end of the settling bucket 16 and is discharged from the whole treatment tank 1 by the clear water discharge pipe 106. When the sludge in 16 reaches a certain amount, start the sludge auger conveyor 18 to send out the settled sludge in time.

In the existing sewage treatment plant, there is no sludge interception mechanism between the anoxic reactor and the aerobic reactor, resulting in the need to frequently start the return pump to return the mixed liquid in the aerobic reactor to the anoxic reactor during operation In order to ensure the stable maintenance of the amount of bacteria inside the anoxic reactor, and the oxygen concentration in the mixed solution is high, frequent reflux of the mixed solution will lead to an increase in the oxygen content of the internal reaction solution in the anoxic reactor, resulting in anoxic after each reflux The anaerobic bacteria in the reactor cannot sustain high treatment efficiency continuously.

As shown in Fig. 3, Fig. 4 and Fig. 9, the second overflow port 501 on the second partition 5 is provided with a bio-sludge retention mechanism 17, and the bio-sludge retention mechanism 17 includes The filter cover 171 on the side is provided with a large number of filter holes at the lower end of the filter cover 171, so that the sewage flowing into the aerobic reaction chamber 103 from the second overflow port 501 is first filtered through the filter holes, and the biological mud is retained in the filter after filtering. The lower end of the cover 171.

Belt rollers 172 are arranged at the upper and lower ends of the filter cover 171, a mud scraping belt 173 is arranged between the two belt rollers 172, and then a plurality of mud scrapers 174 are connected at equal intervals on the outer side of the mud scraping belt 173, and Filter holes are also provided on the mud scraper 174 so that moisture is filtered during the mud scraping process.

A sludge return port 502 is disposed above the second overflow port 501 , and the sludge return port 502 is aligned with the upper end of the filter housing 171 . A mud return plate 175 is obliquely inserted in the sludge return port 502, and a pressing protrusion 176 is arranged at the end of the mud returning plate 175, and a spring is connected between the pressing protrusion 176 and the second partition plate 5. 177. Biological slime retaining mechanism 17 also comprises the drive motor 178 that is arranged on the outer surface of processing box 1, and the motor shaft of drive motor 178 is connected with the belt roller 172 of upper end, is also provided with on the roller shaft of belt roller 172 and presses convex Block 176 interacts with cam 179 .

In the present invention, through the design of the bio-sludge retaining mechanism 17, the sewage flowing out of the second overflow port 501 enters the lower end of the filter cover 171, and the bio-sludge in the sewage is intercepted through the filter holes at the lower end of the filter cover 171. When the biological sludge retained at the lower end of the filter cover 171 reaches a certain amount, the filter hole will be blocked. At this time, the driving motor 178 is started to make the mud scraping belt 173 start to drive, and then the mud scraper 174 is driven to move under the action of the mud scraping belt 173. Thereby scrape up the biological slime trapped in the lower end of the filter cover 171 . When the mud scraper 174 that scraped biological mud moved over the top of the mud scraper belt 173, the non-protruding part of the cam 179 interacted with the pressing projection 176, and the return of the mud scraper 175 was made under the action of the spring 177. The upper end protrudes into the upper end of the filter housing 171 to receive the biological sludge that falls after turning over, and then the biological sludge falls into the anoxic reaction chamber 102 through the sludge return port 502 . Then, when the drive motor 178 continues to rotate, the raised portion of the cam 179 will squeeze the pressing bump 176, so that the upper end of the mud return plate 175 moves downward to the left, so that the movement process of the mud scraping belt 173 will not be hindered. Guaranteed the normal operation of mud scraping belt 173.

The present invention adopts a specially designed pneumatic agitator in the anaerobic reaction chamber, anoxic reaction chamber and aerobic reaction chamber to realize the stirring of sewage. Since the pneumatic agitator is arranged at the bottom of the reaction chamber, it will not affect Bio-films are installed in the anaerobic reaction chamber and anoxic reaction chamber; in addition, the pneumatic agitators in each reaction chamber are connected in series by air pipes, and all the pneumatic agitators can be realized at the same time only by using the compressed gas generated by the air compressor. The operation can effectively reduce the problem of large energy consumption in the operation of multiple vertical mixers in the prior art, and the final compressed gas can be discharged from the aeration head to realize the aeration effect on the aerobic reaction chamber. This makes the whole AAO sewage treatment plant have lower operating costs.

The present invention also designs a special structure adjustable spacing biofilm hanger on the basis of setting the pneumatic agitator. When the pneumatic agitator is running, the biofilm will move closer to the middle until all the biofilms are located on the pneumatic agitator. When stirring, the turbid sewage can fully contact with the anaerobic bacteria on the bio-hanging film, which effectively improves the effect of sewage treatment; in addition, when the pneumatic agitator is not in operation, multiple bio-hanging The membranes can be moved away from each other under the action of the driving unit, so that multiple bio-hanging membranes can cover the entire anaerobic reaction chamber or anoxic reaction chamber to ensure the sewage treatment effect at each position in the treatment chamber.

The design of the bio-sludge intercepting mechanism of the present invention can filter the sewage flowing into the aerobic reaction chamber in the anoxic reaction chamber, and the filtered sewage will be discharged into the aerobic reaction chamber, and the bio-sludge retained will be in the aerobic reaction chamber. Under the action of the scraper belt and the scraper, it is conveyed upwards, and then the scraped sludge will be discharged into the mud return board after the mud scraper moves over the top of the mud scraper belt, and then re-entered through the mud return board In the anoxic reaction chamber; the design of the entire bio-sludge retaining mechanism not only effectively avoids the loss of bio-sludge in the anoxic reaction chamber, but also ensures that the amount of bio-sludge in the anoxic reaction chamber is always maintained within the optimal value, and the scraper plate The cyclic movement can clean up the trapped sludge, avoid the clogging of the filter holes at the lower end of the filter cover, and ensure the filtration and retention effect on sewage.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (10)

1. a kind of AAO sewage treatment plant based on anaerobic ammonium oxidation, it is characterized in that, comprise treatment box and control cabinet, the inside of described treatment box is divided into anaerobic reaction chamber, deficient successively by several dividing plates from left to right Oxygen reaction chamber, aerobic reaction chamber and sedimentation chamber, the first overflow port, second overflow port and overflow pipe are respectively arranged on the said dividing plate from left to right, the outer side wall of said anaerobic reaction chamber There is a water inlet pipe on the top, a clear water discharge pipe is provided on the side wall of the sedimentation chamber, and two pneumatic Agitators, the pneumatic agitators are arranged in series through air pipes, and an air compressor is arranged on the outer surface of the treatment box, and the air compressor is connected to the first pneumatic agitator in the anaerobic reaction chamber. connected, an aeration head is arranged on the air pipe of the aerobic reaction chamber; Both the anaerobic reaction chamber and the anoxic reaction chamber are provided with adjustable spacing biofilm hangers, and the adjustable spacing biofilm hangers include The horizontal chute on the two side walls of the chamber, two aligned fork-type telescopic frames are arranged between the two horizontal chutes, and each center crossing position of the two fork-type telescopic frames is provided with a horizontal rod, both ends of the cross bar are provided with sliders that extend into the horizontal chute, and each of the cross bars is provided with a plurality of bio-hanging films at intervals, and the distance adjustable bio-film hanger It also includes a driving device for realizing the contraction of the two ends of the fork-type telescopic frame to the center. 2. The AAO sewage treatment device based on anaerobic ammonium oxidation according to claim 1, characterized in that, the drive device comprises a screw nut connected to the front end and the rear end of the cross bar, two of the A two-way screw is threaded on the screw nut, and one end of the two-way screw is connected with a screw motor. 3. the AAO sewage treatment device based on anaerobic ammonium oxidation according to claim 1, is characterized in that, described pneumatic agitator comprises support and disk casing, and described disk casing is connected with the upper end of described support, and The rotating shaft extending into the bracket is concentrically rotated in the disc housing, the rotating shaft inside the disc housing is provided with air vanes, and the lower end of the rotating shaft is connected with a stirring blade located in the bracket. , two tangential pipes connected with the trachea are connected on the circumferential surface of the disk shell. 4 . The AAO sewage treatment device based on anaerobic ammonium oxidation according to claim 3 , characterized in that, a sealed bearing cooperating with the rotating shaft is provided at the junction of the disk shell and the support. 5 . 5. the AAO sewage treatment device based on anaerobic ammonium oxidation according to claim 3, is characterized in that, the gas outlet end of described air compressor is connected with three-way valve, and described air compressor is connected with respectively by described three-way valve The anaerobic reaction chamber is connected to the trachea in the aerobic reaction chamber. 6. The AAO sewage treatment device based on anaerobic ammonium oxidation according to claim 1, wherein a bio-sludge retaining mechanism is arranged on the partition at the second overflow outlet, and the bio-sludge The retaining mechanism includes a filter cover connected to the separator, the second overflow port communicates with the filter cover, and a filter hole is opened at the lower end of the filter cover. 7. The AAO sewage treatment device based on anaerobic ammonium oxidation according to claim 6, wherein the upper and lower ends of the filter cover are provided with belt rollers, and one end of the belt rollers at the upper end is connected with a drive motor A mud-scraping belt is arranged between the two belt rollers, and a plurality of mud-scraping plates are connected to the outer surface of the mud-scraping belt at equal intervals. 8. The AAO sewage treatment device based on anaerobic ammonium oxidation according to claim 7, wherein a sludge return port is provided on the partition above the second overflow port, and the sludge A mud-returning plate is obliquely inserted in the return port, and the end of the mud-returning plate is provided with a pressing protrusion, and a spring is arranged between the pressing protrusion and the partition plate, and the belt roller at the upper end A cam is arranged on the roller shaft. 9. The AAO sewage treatment device based on anaerobic ammonium oxidation according to claim 1, characterized in that, the inside of the settling chamber is provided with a settling bucket, and the overflow pipe extends into the upper opening of the settling bucket , the lower end of the settling bucket is connected with a sludge auger conveyor extending out of the treatment tank. 10. The AAO sewage treatment device based on anaerobic ammonium oxidation according to claim 1, wherein a pH value is set in the anaerobic reaction chamber, the anoxic reaction chamber, and the aerobic reaction chamber On-line monitor and temperature detection control device.