Anaerobic ammonium oxidation wastewater treatment device and wastewater treatment system

Abstract

The present invention aims to provide an anaerobic ammonium oxidation wastewater treatment device and wastewater treatment system, comprising a treatment box, a first baffle, and a second baffle. The first and second baffles are disposed within the treatment box, dividing the treatment box into three spaces: an anaerobic treatment zone on the left side of the first baffle, a sedimentation collection zone on the right side of the second baffle, and an aerobic treatment zone located between the first and second baffles. The aerobic treatment zone is provided with a mud interception and recovery device on the upper portion of the first baffle, and an anaerobic biological mud return port and an overflow hole are provided on the upper portion of the first baffle. The anaerobic biological mud return port is located above the overflow hole, and the anaerobic biological mud return port and the overflow hole connect the anaerobic treatment zone and the mud interception and recovery device. The second baffle is provided with an overflow port on the upper portion, which connects the aerobic treatment zone and the sedimentation collection zone. The present invention can greatly improve the denitrification treatment effect of wastewater.

Description

Technical Field

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

[0002] The combined wastewater from thermal power plant gasification workshops is typically high in nitrogen, containing a large number of large particle impurities and a large amount of insoluble organic matter, making it very difficult to treat. The most common existing treatment methods for this type of wastewater are AO wastewater treatment equipment or sequencing batch bioreactors, both of which utilize a combination of anaerobic and aerobic bacteria to biodegrade organic matter in the wastewater.

[0003] The invention patent with application number 2019109598155 discloses an AO denitrification device and a denitrification process, which includes an anoxic tank and an aerobic tank. A filler is provided in the aerobic tank, and a supply flow path is provided between the anoxic tank and the inside of the filler; the AO denitrification process includes: receiving sewage and passing the sewage through an anoxic environment and an aerobic environment in turn; setting filler in the aerobic environment; and supplying the mixed VFA generated in the anoxic environment to the inside of the filler in the aerobic environment.

[0004] The AO total nitrogen removal device and total nitrogen removal process disclosed in the above invention have some shortcomings in actual use:

[0005] First, when nitrifying and denitrifying anaerobic bacteria decompose wastewater anaerobically, it is difficult for the denitrification and phosphorus removal bacteria to be enriched in large quantities and fixed in different zones, resulting in insufficient denitrification and phosphorus removal bacteria and limiting the denitrification and phosphorus removal efficiency of the comprehensive wastewater from the gasification workshop of the thermal power plant.

[0006] Secondly, the anaerobic bacteria in the anoxic tank are easily transferred to the aerobic tank along with the sewage, which causes the anaerobic bacteria to be lost quickly and cannot achieve bacterial enrichment. Moreover, the anaerobic bacteria cannot exert their maximum biological activity due to the high oxygen content after flowing into the aerobic tank.

[0007] Third, the mixed liquid return path sends the treated mixed liquid back to the anoxic tank, and the oxygen content in the anoxic tank cannot be accurately controlled. As a result, the anaerobic bacteria that were originally enriched and had the highest biological activity will have their biological activity reduced due to the increase in oxygen concentration.

[0008] Fourthly, the aeration heads in existing sewage treatment plants are easily clogged by sludge and debris in the pool, resulting in poor subsequent nitrogen aeration effects. Summary of the Invention

[0009] The present invention aims to provide an anaerobic ammonium oxidation wastewater treatment device and a sewage treatment system, which can ensure the efficient implementation of the denitrification process, and can make the suspended ball filler fully contact with the wastewater during the aeration process, thereby greatly improving the denitrification treatment effect of the wastewater.

[0010] The anaerobic ammonium oxidation wastewater treatment device comprises a treatment box, a first partition plate, and a second partition plate;

[0011] The first partition and the second partition are arranged in the treatment box, dividing the treatment box into three spaces, namely: an anaerobic treatment area on the left side of the first partition, a sedimentation collection area on the right side of the second partition, and an aerobic treatment area located between the first partition and the second partition;

[0012] A mud interception and recovery device is provided on the upper portion of the first partition of the aerobic treatment zone. An anaerobic biological mud return port and an overflow hole are respectively provided on the upper portion of the first partition. The anaerobic biological mud return port is located above the overflow hole. The anaerobic biological mud return port and the overflow hole communicate with the anaerobic treatment zone and the mud interception and recovery device.

[0013] An overflow port is provided on the upper portion of the second partition plate, and the overflow port is connected with the aerobic treatment area and the sedimentation collection area.

[0014] The anaerobic treatment zone is provided with an anaerobic ammonium oxidation suspended ball filler and a nitrogen aeration mechanism. A stirring motor is provided on the top of the anaerobic treatment zone. The output shaft of the stirring motor is vertically downwardly arranged. The output shaft of the stirring motor is mounted with a stirring rod through a coupling. The lower end of the stirring rod extends into the lower part of the anaerobic treatment zone and is provided with a stirring blade.

[0015] The aerobic treatment area is provided with an aerobic bacteria biofilm frame and an air aeration mechanism.

[0016] The nitrogen aeration mechanism includes a nitrogen storage tank, a nitrogen delivery pipe, a nitrogen aeration pipe, an anti-blocking aeration head, and a mesh sieve plate. A nitrogen aeration pipe is provided at the bottom of the anaerobic treatment area. The nitrogen aeration pipe is connected to the nitrogen storage tank outside the treatment box through a nitrogen delivery pipe. A plurality of anti-blocking aeration heads are evenly spaced on the upper surface of the nitrogen aeration pipe; the mesh sieve plate is provided above the nitrogen aeration pipe.

[0017] The air aeration mechanism includes an aeration fan, an air delivery pipe and an air aeration pipe. The air aeration pipe is arranged at the bottom of the aerobic treatment area, below the aerobic bacteria biofilm rack. The air aeration pipe is connected to the aeration fan outside the treatment box through the air delivery pipe. The upper surface of the air aeration pipe is also provided with multiple anti-blocking aeration heads.

[0018] The anti-blocking aeration head includes an upper aeration head shell, a blocking head, a connecting rod, an airflow pushing head, and a supporting spring;

[0019] A plurality of aeration holes are evenly arranged on the upper surface of the upper aeration head shell, and each aeration hole is provided with a sealing head with a clearance fit, and the lower end of the sealing head is provided with a connecting rod extending into the upper aeration head shell, and the diameter of the connecting rod is smaller than the inner diameter of the aeration hole; the lower end of the connecting rod is connected to the airflow pushing head in the upper aeration head shell, and a supporting spring is provided at the bottom of the airflow pushing head, and the bottom of the supporting spring is connected to the bottom of the upper aeration head shell. In the natural state, the supporting spring pulls the airflow pushing head, thereby causing the sealing head to block the aeration hole; the lower end of the upper aeration head shell is provided with a threaded connecting pipe for connecting to a nitrogen aeration pipe or an air aeration pipe.

[0020] The processing box body is a square body, and the first partition plate and the second partition plate are vertically arranged and parallel to the left and right side walls of the processing box body.

[0021] The intercepted mud recovery device comprises a collecting tank, a filter membrane frame, a biological filter membrane, a liquid discharge pipe, and a membrane scraping mechanism;

[0022] The collecting tank is a square box body with openings on the top and left side. The opening of the collecting tank is connected to the first partition plate, covering the anaerobic biological sludge return port and overflow hole as a whole.

[0023] A filter membrane frame is provided in the collection tank, and a biological filter membrane is provided in the filter membrane frame; the filter membrane frame and the biological filter membrane are arranged along the front-to-back direction, dividing the collection tank into a left chamber and a right chamber; more than one set of drainage pipes are provided at the lower part of the right side wall of the collection tank; a scraping mechanism is provided in the left chamber.

[0024] The scraping mechanism includes a driving cylinder, a scraping plate, and a vertical slide;

[0025] The front and rear side walls of the left chamber are provided with corresponding vertical slide grooves, and the middle portions of the front and rear side surfaces of the scraper plate are respectively installed in the vertical slide grooves through sliding blocks. The driving cylinder is provided at the top of the collection tank through a mounting plate, and its piston rod extends vertically downward into the collection tank and is hinged to the hinge seat in the middle portion of the upper surface of the scraper plate;

[0026] The side wall of the left chamber on the right side of the vertical slide is provided with corresponding arc guide grooves, and the right parts of the front and rear sides of the scraper plate are respectively provided with guide slide columns, and the guide slide columns are installed in the arc guide grooves; the right side of the scraper plate is in contact with the left side of the biological filter membrane.

[0027] A collecting bucket is provided in the sedimentation collection area, and a liquid outlet channel extending out of the treatment box body is provided at the right end of the collecting bucket, and a sludge sedimentation tank is provided at the lower part of the collecting bucket, and an auger spiral blade is provided in the sludge sedimentation tank. An auger motor is provided at the front side wall of the collecting bucket corresponding to the front end of the sludge sedimentation tank, and the output shaft of the auger motor penetrates into the sludge sedimentation tank through a coupling and is connected to the auger spiral blade, and a sewage pipe is provided at the rear end bottom of the liquid outlet channel.

[0028] The present invention also provides a wastewater treatment system, which applies the above-mentioned anaerobic ammonium oxidation wastewater treatment device, and further includes a primary sedimentation tank, a hydrolysis and acidification tank, a secondary sedimentation tank, a sludge thickening tank, and a screw press desludging machine; the primary sedimentation tank, hydrolysis and acidification tank, anaerobic ammonium oxidation wastewater treatment device, secondary sedimentation tank, sludge thickening tank, and screw press desludging machine are connected in sequence; the primary sedimentation tank is connected to the sludge thickening tank through a pipeline.

[0029] The treatment process of the wastewater treatment system of the present invention is as follows:

[0030] 1) The comprehensive wastewater from the gasification workshop is sent to the primary sedimentation tank for sedimentation to remove large particles of impurities and then enters the hydrolysis and acidification tank. The hydrolytic bacteria and acidifying bacteria in the hydrolysis and acidification tank hydrolyze the insoluble organic matter in the water into soluble organic matter, and convert the difficult-to-biodegrade macromolecules into easily biodegradable small molecules;

[0031] 2) The wastewater after the hydrolysis and acidification treatment in the step is sent to the anaerobic ammonium oxidation wastewater treatment device, first denitrified by anaerobic ammonium oxidation bacteria in the anaerobic treatment zone, and then enters the aerobic treatment zone to remove organic pollutants COD and BOD5 in the wastewater by aerobic bacteria;

[0032] The specific treatment process in the anaerobic ammonium oxidation wastewater treatment device is as follows:

[0033] a. The wastewater after the hydrolysis and acidification treatment in step 1) is fed into the top opening of the anaerobic treatment zone using an external sewage pump and a liquid infusion tube. When the wastewater enters the anaerobic treatment zone, the wastewater is subjected to anaerobic ammonia oxidation denitrification treatment using anaerobic ammonia oxidizing bacteria loaded with suspended ball fillers previously introduced therein. During the denitrification process, the dissolved oxygen content and pH value of the wastewater are controlled to be at optimal values ​​for anaerobic ammonia oxidizing bacteria denitrification treatment.

[0034] b. After the wastewater has been fully denitrified, as the liquid level rises, the denitrified wastewater enters the sludge interception and recovery device through the overflow hole, and the activated sludge is intercepted by the biological filter membrane in the sludge interception and recovery device. The filtered wastewater enters the aerobic treatment area through the drain pipe. At the same time, the activated sludge trapped on the biological filter membrane is scraped off by the scraping mechanism and falls back into the anaerobic treatment area through the anaerobic biological sludge return port;

[0035] c. After the denitrified wastewater enters the anaerobic treatment area, the aerobic bacteria on the aerobic biofilm rack will be used to remove the organic pollutants COD and BOD5 in the wastewater through biological decomposition;

[0036] d. After the aerobic bacteria decomposition treatment, the wastewater flows into the collection bucket through the overflow port as the liquid level rises for sedimentation. Once there are too many impurities precipitated at the bottom of the collection bucket, the auger motor can be started and the precipitated sludge can be sent to the mud tank through the auger spiral blade. Part of the sludge will re-enter the biochemical system under the action of the sludge return pump to prevent the loss of aerobic bacteria, and the remaining aged sludge will be sent to the secondary sedimentation tank for sedimentation.

[0037] 3) The liquid after anaerobic and aerobic treatment in the step is sent to the secondary sedimentation tank for precipitation. The supernatant after precipitation is left in the clear water tank and pumped to the alumina industrial wastewater treatment station for reuse. The sediment in the primary sedimentation tank and the secondary sedimentation tank is dehydrated and concentrated by the spiral desludging machine and then regularly transported to the designated garbage dumping point or landfill by the sanitation vehicle.

[0038] The anaerobic ammonia oxidation wastewater treatment device of the present invention uses suspended ball fillers to load anaerobic bacteria during the anaerobic treatment process, and denitrifies the wastewater through the anaerobic ammonia oxidation bacteria; at the same time, through nitrogen aeration, not only can the DO concentration of the wastewater during the anaerobic treatment process be effectively reduced to ensure the efficient progress of the denitrification process, but also the suspended ball fillers can be fully contacted with the wastewater during the aeration process, greatly improving the denitrification treatment effect of the wastewater.

[0039] The anaerobic ammonium oxidation wastewater treatment device of the present invention is equipped with a sludge interception and recovery device on the partition between the anaerobic treatment zone and the aerobic treatment zone. This interception and recovery device not only filters the wastewater overflowing from the anaerobic treatment zone through biological sludge, but also continuously scrapes the biological filter membrane through a membrane scraping mechanism. While ensuring the wastewater filtration effect, the scraped biological sludge can be discharged back into the anaerobic treatment zone. This not only prevents the loss of anaerobic ammonium oxidation activated sludge in the anaerobic treatment zone, but also allows the intercepted sludge to be discharged back into the anaerobic treatment zone, which can accelerate the enrichment of anaerobic bacteria and maintain the highest treatment efficiency.

[0040] The anaerobic ammonia oxidation wastewater treatment device of the present invention further improves the aeration head. After the gas is introduced into the anti-blocking aeration head, the airflow acts on the arc air groove to push the head upward. At this time, the blocking head is pushed out of the corresponding aeration hole, and the connecting rod is in the aeration hole. At the same time, because the aperture of the aeration hole is larger than the diameter of the connecting rod, the airflow can be discharged through the aeration hole. Under the state of positive airflow pressure, the sludge cannot enter the aeration head and cause blockage. When the aeration is finished, the effect of the airflow disappears, and the airflow pushes the head downward instantly under the action of the supporting spring, so that the blocking head can be immediately pulled into the aeration hole, so that all the aeration holes are sealed, which can prevent sludge from entering the interior and causing blockage. This structure makes the entire device have a better aeration effect whether it is nitrogen aeration or air aeration.

[0041] The wastewater treatment system of the present invention has a good treatment effect on gasification workshop wastewater, greatly improves the denitrification treatment effect of the wastewater, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 Schematic diagram of the structure of the anaerobic ammonium oxidation wastewater treatment device of Example 1;

[0043] Figure 2 This is a schematic structural diagram of the anaerobic ammonium oxidation wastewater treatment device of Example 1 without the front side panels;

[0044] Figure 3 This is a schematic structural diagram of the anti-blocking aeration head of Example 1;

[0045] Figure 4 Schematic diagram of the cross-sectional structure of the anti-clogging aeration head of Example 1;

[0046] Figure 5 This is a schematic structural diagram of the mud interception and recovery device of Example 1 after removing the front side panels;

[0047] Figure 6 Schematic diagram of the cross-sectional structure of the mud interception and recovery device of Example 1;

[0048] Figure 7 Schematic diagram of the cross-sectional structure of the mud interception and recovery device of Example 1;

[0049] Figure 8 This is a structural block diagram of the anaerobic ammonium oxidation wastewater treatment system of Example 2;

[0050] The serial numbers and names in the figure are as follows:

[0051] 1-treatment box, 2-first partition, 3-second partition, 4-anaerobic treatment area, 5-precipitation collection area, 6-aerobic treatment area, 7-sludge interception and recovery device, 8-anaerobic biological sludge return port, 9-overflow hole, 10-overflow port, 11-nitrogen aeration mechanism, 12-aerobic bacteria biofilm rack, 13-air aeration mechanism, 14-nitrogen storage tank, 15-nitrogen delivery pipe, 16-nitrogen aeration pipe, 17-anti-blocking aeration head, 18-grid screen plate, 19-air delivery pipe, 20-air aeration pipe, 21-aeration head shell, 22-sealing head, 23-connecting rod, 24-air flow push head, 25 -Support spring, 26-Aeration hole, 27-Threaded connecting pipe, 28-Collection tank, 29-Filter membrane frame, 30-Biological filter membrane, 31-Drain pipe, 32-Left chamber, 33-Right chamber, 34-Drive cylinder, 35-Scraper plate, 36-Vertical slide, 37-Sliding block, 38-Hinged seat, 39-Arc guide groove, 40-Guide slide column, 41-Collection bucket, 42-Liquid outlet channel, 43-Sludge sedimentation tank, 44-Auger spiral blade, 45-Auger motor, 46-Sewage discharge pipe, 47-Stirring motor, 48-Stirring rod, 49-Stirring blade, 50-Aeration fan, 51-Mounting plate. Implementation Method Example 1

[0052] The present invention is described in detail below with reference to the accompanying drawings and embodiments. Example 1

[0053] like Figure 1-7 As shown, the anaerobic ammonium oxidation wastewater treatment device includes a treatment box 1, a first partition 2, and a second partition 3;

[0054] The processing box body 1 is a square body, and the first partition plate 2 and the second partition plate 3 are vertically arranged and parallel to the left and right side walls of the processing box body 1.

[0055] The first partition 2 and the second partition 3 are arranged in the treatment box 1, dividing the treatment box 1 into three spaces, namely: an anaerobic treatment area 4 on the left side of the first partition 2, a sedimentation collection area 5 on the right side of the second partition 3, and an aerobic treatment area 6 located between the first partition 2 and the second partition 3;

[0056] The anaerobic treatment zone 4 is provided with an anaerobic ammonia oxidation suspended ball filler and a nitrogen aeration mechanism 11. A stirring motor 47 is provided at the top of the anaerobic treatment zone 4. The output shaft of the stirring motor 47 is vertically downwardly arranged. The output shaft of the stirring motor 47 is installed with a stirring rod 48 through a coupling. The lower end of the stirring rod 48 extends into the lower part of the anaerobic treatment zone 4 and is provided with a stirring blade 49. The aerobic treatment zone is provided with an aerobic bacteria biofilm rack 12 and an air aeration mechanism 13.

[0057] The nitrogen aeration mechanism 11 includes a nitrogen storage tank 14, a nitrogen delivery pipe 15, a nitrogen aeration pipe 16, an anti-blocking aeration head 17, and a mesh sieve plate 18. A nitrogen aeration pipe 16 is provided at the bottom of the anaerobic treatment area 4. The nitrogen aeration pipe 16 is connected to the nitrogen storage tank 14 outside the treatment box 1 through the nitrogen delivery pipe 15. A plurality of anti-blocking aeration heads 17 are evenly spaced on the upper surface of the nitrogen aeration pipe 16; the mesh sieve plate 18 is provided above the nitrogen aeration pipe 16.

[0058] The air aeration mechanism 13 includes an aeration fan 50, an air delivery pipe 19 and an air aeration pipe 20. The air aeration pipe 20 is arranged at the bottom of the aerobic treatment area 6, below the aerobic bacteria biofilm rack 12. The air aeration pipe 20 is connected to the aeration fan 50 outside the treatment box 1 through the air delivery pipe 19. The upper surface of the air aeration pipe 20 is also provided with multiple anti-blocking aeration heads 17.

[0059] The anti-blocking aeration head 17 includes an upper aeration head shell 21, a blocking head 22, a connecting rod 23, an airflow pushing head 24, and a support spring 25;

[0060] A plurality of aeration holes 26 are evenly provided on the upper surface of the upper aeration head shell 21, and each aeration hole 26 is provided with a gap-fitting sealing head 22. The lower end of the sealing head 22 is provided with a connecting rod 23 extending into the upper aeration head shell 21, and the diameter of the connecting rod 23 is smaller than the inner diameter of the aeration hole 26; the lower end of the connecting rod 23 is connected to the airflow pushing head 24 in the upper aeration head shell 21, and a support spring 25 is provided at the bottom of the airflow pushing head 24. The bottom of the support spring 25 is connected to the bottom of the upper aeration head shell 21. In the natural state, the support spring 25 pulls the airflow pushing head 24, thereby causing the sealing head 22 to block the aeration hole 26; the lower end of the upper aeration head shell 21 is provided with a threaded connecting pipe 27 for connecting to the nitrogen aeration pipe 16 or the air aeration pipe 20.

[0061] A mud interception and recovery device 7 is provided on the upper portion of the first partition 2 of the aerobic treatment zone 6. An anaerobic biological mud return port 8 and an overflow hole 9 are provided on the upper portion of the first partition 2. The anaerobic biological mud return port 8 is located above the overflow hole 9. The anaerobic biological mud return port 8 and the overflow hole 9 communicate with the anaerobic treatment zone 4 and the mud interception and recovery device 7.

[0062] An overflow port 10 is provided on the upper portion of the second partition plate 3 , and the overflow port 10 is connected to the aerobic treatment area 6 and the sedimentation collection area 5 .

[0063] The intercepted mud recovery device 7 includes a collection tank 28, a filter membrane frame 29, a biological filter membrane 30, a drainage pipe 31, and a membrane scraping mechanism;

[0064] The collecting tank 28 is a square box body with openings on the top and left side. The opening of the collecting tank 28 is connected to the first partition 2, covering the anaerobic biological sludge return port 8 and the overflow hole 9 as a whole.

[0065] A filter membrane frame 29 is provided in the collection tank 28, and a biological filter membrane 30 is provided in the filter membrane frame 29; the filter membrane frame 29 and the biological filter membrane 30 are arranged in the front-to-back direction, dividing the collection tank 28 into a left chamber 32 and a right chamber 33; one or more drainage pipes 31 are provided at the lower part of the right side wall of the collection tank 28; a scraping mechanism is provided in the left chamber 32.

[0066] The scraping mechanism includes a driving cylinder 34, a scraping plate 35, and a vertical slide 36;

[0067] Corresponding vertical slots 36 are provided on the front and rear side walls of the left chamber 32. The middle portions of the front and rear side surfaces of the scraper plate 35 are mounted in the vertical slots 36 via sliding blocks 37. The drive cylinder 34 is mounted on the top of the collection tank 28 via a mounting plate 51. The piston rod of the drive cylinder 34 extends vertically downward into the collection tank 28 and is hinged to a hinged seat 38 in the middle portion of the upper surface of the scraper plate 35.

[0068] The side wall of the left chamber 32 on the right side of the vertical slide 36 is provided with corresponding arc-shaped guide grooves 39, and the right parts of the front and rear sides of the scraper 35 are respectively provided with guide slides 40, and the guide slides 40 are installed in the arc-shaped guide grooves 39; the right side of the scraper 35 is in contact with the left side of the biological filter membrane 30.

[0069] A collecting bucket 41 is provided in the sedimentation collection area 5, and a liquid outlet channel 42 extending out of the treatment box 1 is provided at the right end of the collecting bucket 41, and a sludge sedimentation tank 43 is provided at the lower part of the collecting bucket 41, and an auger spiral blade 44 is provided in the sludge sedimentation tank 43. An auger motor 45 is provided at the front side wall of the collecting bucket 41 corresponding to the front end of the sludge sedimentation tank 43, and the output shaft of the auger motor 45 penetrates into the sludge sedimentation tank 43 through a coupling and is connected to the auger spiral blade 44, and a sewage pipe 46 is provided at the bottom of the rear end of the liquid outlet channel 42. Example 2

[0070] like Figure 8 As shown, the present invention also provides an anaerobic ammonium oxidation wastewater treatment system, which applies the anaerobic ammonium oxidation wastewater treatment device of Example 1, and also includes a primary sedimentation tank, a hydrolysis acidification tank, a secondary sedimentation tank, a sludge thickening tank, and a spiral press desludging machine; the primary sedimentation tank, hydrolysis acidification tank, anaerobic ammonium oxidation wastewater treatment device, secondary sedimentation tank, sludge thickening tank, and spiral press desludging machine are connected in sequence; the primary sedimentation tank 1 is connected to the sludge thickening tank 5 through a pipeline.

Claims

1. An anaerobic ammonium oxidation wastewater treatment device, comprising a treatment box (1), a first baffle (2), and a second baffle (3), characterized in that: The first partition (2) and the second partition (3) are arranged in the treatment box (1), dividing the treatment box (1) into three spaces, namely: an anaerobic treatment area (4) on the left side of the first partition (2), a sedimentation collection area (5) on the right side of the second partition (3), and an aerobic treatment area (6) located between the first partition (2) and the second partition (3); A mud interception and recovery device (7) is provided on the upper portion of the first partition (2) of the aerobic treatment zone (6); an anaerobic biological mud return port (8) and an overflow hole (9) are provided on the upper portion of the first partition (2); the anaerobic biological mud return port (8) is located above the overflow hole (9); the anaerobic biological mud return port (8) and the overflow hole (9) are connected to the anaerobic treatment zone (4) and the mud interception and recovery device (7); An overflow port (10) is provided on the upper portion of the second partition plate (3), and the overflow port (10) is connected to the aerobic treatment area (6) and the sedimentation collection area (5); The intercepted mud recovery device (7) comprises a collecting tank (28), a filter membrane frame (29), a biological filter membrane (30), a drainage pipe (31), and a membrane scraping mechanism; The collecting tank (28) is a square box body with openings on the top and left side. The opening of the collecting tank (28) is connected to the first partition (2), covering the anaerobic biological mud return port (8) and the overflow hole (9) as a whole. A filter membrane frame (29) is provided in the collection tank (28), and a biological filter membrane (30) is provided in the filter membrane frame (29); the filter membrane frame (29) and the biological filter membrane (30) are arranged in the front-to-back direction, dividing the collection tank (28) into a left chamber (32) and a right chamber (33); one or more drainage pipes (31) are provided at the lower part of the right side wall of the collection tank (28); and a scraping mechanism is provided in the left chamber (32).

2. The anaerobic ammonium oxidation wastewater treatment device according to claim 1, characterized in that: The anaerobic treatment zone (4) is provided with an anaerobic ammonium oxidation suspended ball filler and a nitrogen aeration mechanism (11). A stirring motor (47) is provided on the top of the anaerobic treatment zone (4). The output shaft of the stirring motor (47) is vertically downwardly arranged. The output shaft of the stirring motor (47) is mounted with a stirring rod (48) through a coupling. The lower end of the stirring rod (48) extends into the lower part of the anaerobic treatment zone (4) and is provided with a stirring blade (49). An aerobic bacteria biofilm rack (12) and an air aeration mechanism (13) are provided in the aerobic treatment zone.

3. The anaerobic ammonium oxidation wastewater treatment device according to claim 2, characterized in that: The nitrogen aeration mechanism (11) comprises a nitrogen storage tank (14), a nitrogen delivery pipe (15), a nitrogen aeration pipe (16), an anti-blocking aeration head (17), and a mesh screen plate (18). A nitrogen aeration pipe (16) is provided at the bottom of the anaerobic treatment zone (4). The nitrogen aeration pipe (16) is connected to the nitrogen storage tank (14) outside the treatment box (1) through the nitrogen delivery pipe (15). A plurality of anti-blocking aeration heads (17) are evenly spaced on the upper surface of the nitrogen aeration pipe (16); and the mesh screen plate (18) is provided above the nitrogen aeration pipe (16).

4. The anaerobic ammonium oxidation wastewater treatment device according to claim 3, characterized in that: The air aeration mechanism (13) includes an aeration fan (50), an air delivery pipe (19) and an air aeration pipe (20). The air aeration pipe (20) is arranged at the bottom of the aerobic treatment area (6) and below the aerobic bacteria biofilm rack (12). The air aeration pipe (20) is connected to the aeration fan (50) outside the treatment box (1) through the air delivery pipe (19). The upper surface of the air aeration pipe (20) is also provided with a plurality of anti-blocking aeration heads (17).

5. The anaerobic ammonium oxidation wastewater treatment device according to claim 4, characterized in that: The anti-blocking aeration head (17) comprises an upper aeration head shell (21), a blocking head (22), a connecting rod (23), an airflow pushing head (24), and a supporting spring (25); The upper surface of the upper aeration head shell (21) is uniformly provided with a plurality of aeration holes (26), and each aeration hole (26) is provided with a plugging head (22) with a clearance fit. The lower end of the plugging head (22) is provided with a connecting rod (23) extending into the upper aeration head shell (21), and the diameter of the connecting rod (23) is smaller than the inner diameter of the aeration hole (26); the lower end of the connecting rod (23) is connected to the airflow driving head (24) in the upper aeration head shell (21), and the bottom of the airflow driving head (24) is provided with a supporting spring (25), and the bottom of the supporting spring (25) is connected to the bottom of the upper aeration head shell (21). In a natural state, the supporting spring (25) pulls the airflow driving head (24), thereby causing the plugging head (22) to block the aeration hole (26); the lower end of the upper aeration head shell (21) is provided with a threaded connecting pipe (27) for connecting to the nitrogen aeration pipe (16) or the air aeration pipe (20).

6. The anaerobic ammonium oxidation wastewater treatment device according to claim 1, wherein: The processing box (1) is a square body, and the first partition (2) and the second partition (3) are vertically arranged and parallel to the left and right side walls of the processing box (1).

7. The anaerobic ammonium oxidation wastewater treatment device according to claim 1, characterized in that: The film scraping mechanism includes a driving cylinder (34), a film scraping plate (35), and a vertical slide groove (36); The left chamber (32) is provided with vertical slide grooves (36) corresponding to each other on the front and rear side walls, and the middle parts of the front and rear side surfaces of the scraper plate (35) are respectively installed in the vertical slide grooves (36) through sliding blocks (37). The driving cylinder (34) is arranged on the top of the collection tank (28) through the mounting plate (51), and its piston rod extends vertically downward into the collection tank (28) and is hinged to the hinge seat (38) in the middle part of the upper surface of the scraper plate (35); The side wall of the left chamber (32) on the right side of the vertical slide (36) is provided with corresponding arc-shaped guide grooves (39), and the right parts of the front and rear sides of the scraper (35) are respectively provided with guide slides (40), and the guide slides (40) are installed in the arc-shaped guide grooves (39); the right side of the scraper (35) is in contact with the left side of the biological filter membrane (30).

8. The anaerobic ammonium oxidation wastewater treatment device according to claim 1, wherein: A collecting bucket (41) is provided in the sedimentation collection area (5), and a liquid outlet channel (42) extending out of the treatment box (1) is provided at the right end of the collecting bucket (41), and a sludge sedimentation tank (43) is provided at the lower part of the collecting bucket (41), and an auger spiral blade (44) is provided in the sludge sedimentation tank (43). An auger motor (45) is provided at the front side wall of the collecting bucket (41) corresponding to the front end of the sludge sedimentation tank (43), and the output shaft of the auger motor (45) penetrates into the sludge sedimentation tank (43) through a coupling and is connected to the auger spiral blade (44), and a sewage pipe (46) is provided at the bottom of the rear end of the liquid outlet channel (42).

9. A wastewater treatment system, using the anaerobic ammonium oxidation wastewater treatment device according to any one of claims 1 to 8, characterized in that: It also includes a primary sedimentation tank, a hydrolysis and acidification tank, a secondary sedimentation tank, a sludge thickening tank, and a spiral press desludging machine; the primary sedimentation tank, the hydrolysis and acidification tank, the anaerobic ammonia oxidation wastewater treatment device, the secondary sedimentation tank, the sludge thickening tank, and the spiral press desludging machine are connected in sequence; the primary sedimentation tank (1) is connected to the sludge thickening tank (5) through a pipeline.

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