A super-micro-nano bubble oxygenation coupled air floatation sewage treatment device and method

Abstract

The present application relates to sewage treatment technical field, disclose a kind of supermicro nanobubble oxygenation coupling air float sewage treatment device, including anoxic tank and aerobic tank, and the water pipeline is communicated between the anoxic tank and aerobic tank, and the air float component for being installed to the inside aeration of one side of aerobic tank;The air float component includes the supermicro nanobubble generator installed in the side of aerobic tank away from anoxic tank, the inside bottom of aerobic tank is fixedly connected with releaser, and the gas inlet of supermicro nanobubble generator is communicated with the gas inlet pipe between releaser, and the inner wall side of aerobic tank is fixedly connected with dross collection component;The dross collection component includes the dross tank being fixedly connected with the inner wall of aerobic tank, and the side of dross tank close to anoxic tank is slidably connected with longitudinal plate.The present application solves the combination degree of multiple wastewater treatment processes in the prior art is low, difficult to reduce energy consumption and land area while wastewater is treated by multiple processes.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a wastewater treatment device and method using ultra-micro nanobubbles oxygenated coupled with air flotation. Background Technology

[0002] The AO water treatment process connects the anoxic section at the front and the aerobic section at the back. The air flotation method involves introducing air or other gases into the wastewater to generate bubbles, causing some fine suspended solids or particles in the water to attach to the bubbles and float to the surface to be scraped off.

[0003] A search revealed that patent application number CN202310146306.7 discloses a wastewater treatment device in which wastewater sequentially enters a coagulation sedimentation tank and an air flotation tank. The concentrated liquid in the air flotation tank then enters an AO biological treatment tank. The combination of multiple wastewater treatment methods can improve the quality of the treated wastewater.

[0004] The aforementioned device requires multiple wastewater treatment tanks, resulting in a large footprint for wastewater treatment. It simply treats wastewater through multiple processes with low integration between different processes, which not only increases the treatment time but also increases energy consumption due to the multiple treatment steps. Therefore, there is a need for equipment that can improve the integration of multiple wastewater treatment processes and reduce energy consumption and footprint while treating wastewater through multiple processes. Summary of the Invention

[0005] The purpose of this invention is to address the problem that the integration of multiple wastewater treatment processes in the prior art is low, making it difficult to reduce energy consumption and land area while wastewater undergoes multiple processes. Therefore, this invention proposes an ultra-micro nanobubble oxygenation coupled air flotation wastewater treatment device and method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An ultra-micro nanobubble oxygenation coupled air flotation wastewater treatment device includes an anoxic tank and an aerobic tank, with a water pipe connecting the anoxic tank and the aerobic tank. An air flotation component for aeration is installed on one side of the aerobic tank.

[0008] The air flotation component includes an ultra-micro nano bubble generator installed on the side of the aerobic tank away from the anoxic tank, a release device fixedly connected to the bottom inner side of the aerobic tank, an air inlet pipe connected between the air outlet of the ultra-micro nano bubble generator and the release device, and a scum collection component fixedly connected to one side of the inner wall of the aerobic tank.

[0009] The scum collection assembly includes a scum pool fixedly connected to the inner wall of the aerobic pool, a longitudinal plate slidably connected to the side of the scum pool near the anoxic pool, an inclined plate fixedly connected to one side of the longitudinal plate, a bolt with one end extending to the outside of the inner wall of the scum pool, a spring fixedly connected between the inclined plate and the scum pool, and a notch for the spring to pass through on one side of the longitudinal plate.

[0010] Preferably, a baffle is fixedly connected to the bottom inner side of the aerobic tank, and a combination of elastic packing material with a biofilm attached to its surface is fixedly connected inside both the anoxic tank and the aerobic tank.

[0011] Preferably, one side of the anoxic tank is connected to an inlet pipe, the side of the aerobic tank away from the inlet pipe is connected to an outlet pipe, and a scum hole penetrating the aerobic tank is opened on one side of the scum tank.

[0012] Preferably, a cylinder for blocking water from passing through the inner wall of the water pipe is rotatably connected between the two sides of the inner wall. Multiple arc-shaped grooves are opened on the outer side of the cylinder. A first motor for driving the cylinder to rotate is fixedly connected to one side of the water pipe.

[0013] Preferably, an inclined frame is fixedly connected to one side of the inner wall of the aerobic tank, and multiple vent holes are opened at the top of the inclined frame. A thin tube is connected to one side of the release device, and a trapezoidal frame is connected between the thin tube and the inclined frame.

[0014] Preferably, the top of the aerobic tank is fixedly connected to two sets of vertical plates, one side of which is rotatably connected to a gear, and the two gears on the same side are connected by a chain for transmission, and a scraper is fixedly connected between the two chains.

[0015] Preferably, a crossbar is fixedly connected between the gears on different sides, and a second motor for driving the gears to rotate is fixedly connected to one side of one of the vertical plates.

[0016] Preferably, the aerobic tank has multiple grooves on its outer side, the top and bottom of the grooves are arc surfaces, and a positioning component with one end extending movably to the outside is provided inside the groove. One of the positioning components has an L-shaped plate with both ends extending movably to the outside inside, and the ultra-micro nano bubble generator is installed on the top of the L-shaped plate.

[0017] Preferably, the positioning assembly includes two lifting frames that are slidably connected to the inner wall of the groove, a limiting rod that movably passes through the lifting frames is provided between the two sides of the inner wall of the groove, an L-shaped plate extends movably into the interior of the lifting frames, and a support plate corresponding to the groove is fixedly connected to the outer side of the aerobic tank.

[0018] A method of using the ultra-micro nanobubble oxygenation coupled air flotation wastewater treatment device as described in any one of claims 1-9 includes the following steps:

[0019] Step 1, anoxic treatment: Wastewater enters the anoxic tank through the inlet pipe. The anoxic tank contains a uniformly distributed combination of elastic packing materials. The wastewater is adsorbed and degraded by the biofilm attached to the surface of the elastic packing materials, and then enters the water passage pipe at the bottom of the anoxic tank.

[0020] Step 2: Accelerate centrifugation. Water from inside the water pipe enters the arc-shaped groove on the cylinder. The first motor on the water pipe drives the cylinder to rotate, accelerating the water from inside the water pipe into the aerobic tank.

[0021] Step 3: Ultra-micro nanobubble flotation. The ultra-micro nanobubbles generated by the ultra-micro nanobubble generator enter the aerobic tank through the air inlet pipe and are released through the release device. The suspended solids and pollutants in the sewage from the anoxic tank attach together with the ultra-micro nanobubbles and float to the water surface to form a scum layer. The second motor drives the scraper to move back and forth continuously along the liquid surface, scraping the scum into the scum pool. The scum that sinks downward in the aerobic tank slides along the inclined plate to the top of the release device and is floated again. The scum in the scum pool is discharged through the scum hole.

[0022] Step four, to boost water purification, some of the ultra-micro nano bubbles in the releaser enter the inclined frame through the thin tube and trapezoidal frame, and then spray out obliquely upwards, pushing the water entering the aerobic tank through the water pipe obliquely upwards.

[0023] Step 5: Collect purified water. The wastewater, after removing suspended solids, flows down into the aerobic tank through the baffle and then comes into full contact with the combined elastic packing. Under the efficient dissolved oxygen mass transfer effect of ultra-micro nano bubbles, an aerobic environment is formed. The water is further adsorbed and degraded by the biofilm attached to the surface of the combined elastic packing. The purified water is discharged from the bottom outlet pipe.

[0024] Compared with the prior art, the present invention provides an ultra-micro nanobubble oxygenation coupled with air flotation wastewater treatment device and method, which has the following beneficial effects:

[0025] 1. In this invention, wastewater passes through an anoxic tank and an aerobic tank. The air flotation component continuously introduces ultra-micro nanobubbles from the bottom of the aerobic tank upwards, effectively combining the AO water treatment process and the air flotation method. It eliminates the need for an additional air flotation tank, improving the integration of various wastewater treatment processes. The ultra-micro nanobubble generator is used simultaneously for efficient dissolved oxygenation and efficient air flotation in the aerobic tank, reducing energy consumption while achieving the coupling of two functions in the same device and reducing the space occupied by wastewater treatment.

[0026] 2. This invention adjusts the height of the inclined plate to scrape the scum into the scum pool. The scum that sinks downward in the aerobic pool slides along the inclined plate to the top of the release device and is floated again by air. This can prevent the scum from sinking downward into the water after removing impurities after moving away from the release device, thus preventing secondary pollution of the water after removing impurities and reducing the impurity content in the treated wastewater.

[0027] 3. The rotating cylinder of this invention accelerates the water inside the water pipe and throws it into the aerobic tank. By utilizing the difference in mass between the impurities in the wastewater and the wastewater, centrifugation is performed, throwing the impurities in the wastewater upwards at a greater distance, while the wastewater is thrown upwards at a shorter distance. This preliminary centrifugal separation of impurities in the wastewater concentrates the impurities in a fixed area of ​​the aerobic tank, making it easier to adjust the direction of the release device to release ultra-micro nanobubbles, thereby maximizing the adhesion of impurities by the ultra-micro nanobubbles.

[0028] 4. The cylindrical structure of this invention throws impurities in the sewage upwards to a higher position, and some of the ultra-micro nanobubbles in the release device are sprayed out to the sewage at a lower position through the inclined frame, forming a situation where a large number of impurities gather at the top and sewage with fewer impurities is at the bottom. This can help the sewage to be stratified, reduce the impurity content in the bottom sewage, reduce the power required for the ultra-micro nanobubbles to push the impurities to the surface, and prevent the impurities in the sewage from being unable to be removed due to insufficient force from being pushed by the ultra-micro nanobubbles.

[0029] 5. The present invention moves the lifting frame upward, places the L-shaped plate against the aerobic tank on the support plate, and then lowers the lifting frame to wrap around the top of the L-shaped plate. At this time, the L-shaped plate is limited and fixed by the lifting frame. It can increase the number of equipment installation positions on the aerobic tank as needed, making it convenient to install equipment on the aerobic tank, and will not occupy the surrounding space when the equipment is not needed. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a partial cross-sectional view of the overall scum removal and scraping assembly of the present invention;

[0032] Figure 3 This is an internal sectional view of the aerobic tank and water pipes of the present invention;

[0033] Figure 4 This is a partial cross-sectional view of the scum collection component of the present invention;

[0034] Figure 5 This is a schematic diagram of the connection between the ultra-micro nanobubble generator and the water pipe of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure at the connection between the release device and the tilting frame of the present invention;

[0036] Figure 7 This is a schematic diagram of the scum removal component of the present invention;

[0037] Figure 8 This is a schematic diagram of the positioning component and L-shaped plate of the present invention.

[0038] In the diagram: 1. Anoxic tank; 2. Aerobic tank; 3. Water pipe; 4. Air flotation component; 41. Ultra-micro nano bubble generator; 42. Release device; 43. Air inlet pipe; 44. Scum collection component; 441. Scum tank; 442. Longitudinal plate; 443. Inclined plate; 444. Bolt; 445. Spring; 5. Baffle; 6. Combined elastic packing; 7. Water inlet pipe; 8. Water outlet pipe; 9. Cylinder; 10. First motor; 11. Inclined frame; 12. Thin tube; 13. Trapezoidal frame; 14. Vertical plate; 15. Gear; 16. Chain; 17. Scraper; 18. Crossbar; 19. Second motor; 20. Positioning component; 201. Lifting frame; 202. Limiting rod; 203. Support plate; 21. L-shaped plate. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Example 1

[0042] Reference Figures 1-4 An ultra-micro nanobubble oxygenation coupled with air flotation wastewater treatment device is disclosed, comprising an anoxic tank 1 and an aerobic tank 2, connected by a water pipe 3. An air flotation component 4 for aeration is installed on one side of the aerobic tank 2. Wastewater undergoes AO water treatment through the anoxic tank 1 and aerobic tank 2. Ultra-micro nanobubbles are continuously introduced from the bottom of the aerobic tank 2 upwards through the air flotation component 4 to remove impurities from the wastewater inside the aerobic tank 2. The wastewater after impurity removal is discharged from the bottom of the aerobic tank 2. This device effectively combines AO water treatment and air flotation, eliminating the need for an additional air flotation tank and improving the integration of multiple wastewater treatment processes. The ultra-micro nanobubble generator 41 is used simultaneously for efficient dissolved oxygenation and efficient air flotation in the aerobic tank, reducing energy consumption while achieving coupling of two functions in the same device and reducing the space occupied by wastewater treatment.

[0043] The air flotation component 4 includes an ultra-micro nanobubble generator 41 installed on the side of the aerobic tank 2 away from the anoxic tank 1. A release device 42 is fixedly connected to the bottom inner side of the aerobic tank 2. An air inlet pipe 43 connects the air outlet of the ultra-micro nanobubble generator 41 to the release device 42. A scum collection component 44 is fixedly connected to one side of the inner wall of the aerobic tank 2. First, the sewage is introduced into the anoxic tank 1. After being treated for anoxic conditions inside the anoxic tank 1, it is discharged into the aerobic tank 2 through the water pipe 3. The ultra-micro nanobubbles generated by the ultra-micro nanobubble generator 41 enter the aerobic tank 2 through the air inlet pipe 43 and are released through the release device 42. The suspended solids and pollutants in the sewage from the anoxic tank 1 adhere to the ultra-micro nanobubbles and float to the water surface to form a scum layer. The scum is scraped into the scum collection component 44. The sewage after removing the scum is discharged from the bottom of the aerobic tank 2, realizing a deeper integration of AO water treatment process and air flotation method.

[0044] The scum collection assembly 44 includes a scum pool 441 fixedly connected to the inner wall of the aerobic tank 2. A longitudinal plate 442 is slidably connected to the side of the scum pool 441 near the anoxic tank 1. An inclined plate 443 is fixedly connected to one side of the longitudinal plate 442. A bolt 444 with one end extending movably to the outside is provided on one side of the inner wall of the scum pool 441. A spring 445 is fixedly connected between the inclined plate 443 and the scum pool 441. A notch is provided on one side of the longitudinal plate 442 for the spring 445 to pass through. The spring 445 pushes the inclined plate 443 and the longitudinal plate 442 to rise to the highest position. The operator can lower the inclined plate 443 as needed. When pressed to the designated height, the inclined plate 443 drives the longitudinal plate 442 to descend while compressing and contracting the spring 445. Then, the bolt 444 is rotated. As the bolt 444 moves outward from the scum pool 441, it compresses the longitudinal plate 442. After being compressed, the longitudinal plate 442 is fixed on the scum pool 441, scraping the scum into the scum pool 441. The scum that settles downward inside the aerobic tank 2 slides along the inclined plate 443 to the top of the release device 42 and is floated again. This prevents the scum from sinking into the water after removing impurities after moving away from the release device 42, thus preventing secondary pollution of the water and reducing the impurity content in the treated wastewater.

[0045] A baffle 5 is fixedly connected to the bottom inner side of the aerobic tank 2. Both the anoxic tank 1 and the aerobic tank 2 are fixedly connected with a combined elastic packing material 6 with a biofilm attached to its surface. An inlet pipe 7 is connected to one side of the anoxic tank 1, and an outlet pipe 8 is connected to the side of the aerobic tank 2 away from the inlet pipe 7. A scum hole penetrating the aerobic tank 2 is opened on one side of the scum tank 441. Wastewater enters the anoxic tank 1 through the inlet pipe 7. In the anoxic tank 1, the wastewater is adsorbed and degraded by the biofilm attached to the surface of the combined elastic packing material 6. Then, it enters the aerobic tank 2 through the water pipe 3. Inside the aerobic tank 2, the wastewater undergoes air flotation to remove scum and remove suspended solids. The wastewater passes over the baffle 5 and flows downward in the aerobic tank 2. Then, it comes into full contact with the combined elastic packing material 6. Under the efficient dissolved oxygen mass transfer effect of ultra-micro nano bubbles, an aerobic environment is formed. The biofilm attached to the surface of the combined elastic packing material 6 further adsorbs and degrades the wastewater. The clean water is discharged from the outlet pipe 8 at the bottom.

[0046] Example 2

[0047] like Figures 1-5 As shown, this embodiment is basically the same as embodiment 1. Preferably, a cylinder 9 is rotatably connected between the two sides of the inner wall of the water pipe 3 to block water from passing through its interior. Multiple arc-shaped grooves are opened on the outer side of the cylinder 9. A first motor 10 for driving the cylinder 9 to rotate is fixedly connected to one side of the water pipe 3. Water inside the water pipe 3 enters the arc-shaped groove on the cylinder 9. The first motor 10 on the water pipe 3 drives the cylinder 9 to rotate, accelerating the water inside the water pipe 3 into the aerobic tank 2. By utilizing the difference in mass between the impurities in the sewage and the sewage, centrifugation is performed, throwing the impurities in the sewage obliquely upward a greater distance, while the sewage is thrown obliquely upward a shorter distance. The sewage undergoes preliminary centrifugal separation of impurities, making the impurities more concentrated in the fixed area of ​​the aerobic tank 2. This facilitates the adjustment of the direction of the release device 42 releasing ultra-micro nanobubbles, achieving the purpose of maximizing the adhesion of impurities by the ultra-micro nanobubbles.

[0048] Example 3

[0049] like Figures 1-6As shown, this embodiment is basically the same as embodiment 1. Preferably, an inclined frame 11 is fixedly connected to one side of the inner wall of the aerobic tank 2. Multiple vent holes are opened at the top of the inclined frame 11. A thin tube 12 is connected to one side of the release device 42. A trapezoidal frame 13 is connected between the thin tube 12 and the inclined frame 11. Because the impurities in the sewage thrown into the aerobic tank 2 are thrown upwards at a greater distance under centrifugal force, the impurities move to a higher position, while the sewage with some impurities removed moves a shorter distance. Some of the ultra-micro nanobubbles in the release device 42 are sprayed out of the inclined frame 11 towards the sewage at a lower position, pushing... Wastewater with low impurity content moves the same distance as the impurities, resulting in a large accumulation of impurities at the top and wastewater with fewer impurities at the bottom. The ultra-micro nanobubbles released by the releaser 42 first pass through the wastewater with fewer impurities, attaching and floating the remaining impurities in the wastewater. Then, they pass through the area with a large accumulation of impurities, continuing to attach and float the impurities. This helps to stratify the wastewater, reduce the impurity content in the bottom wastewater, and reduce the power required for the ultra-micro nanobubbles to push the impurities to the surface. This prevents the impurities in the wastewater from being unable to be removed due to insufficient force from the ultra-micro nanobubbles.

[0050] Because the diameter of the thin tube 12 connected to the releaser 42 is small, the amount of ultra-micro nanobubbles flowing into the inclined frame 11 through the thin tube 12 is reduced, ensuring that more ultra-micro nanobubbles are released upwards through the releaser for air flotation. The flow direction of the ultra-micro nanobubbles is reasonably distributed. When the ultra-micro nanobubbles in the thin tube 12 pass through the trapezoidal frame 13, the flow speed of the ultra-micro nanobubbles gradually decreases as the inner diameter gradually increases. The ultra-micro nanobubbles with reduced speed have more time to fill the inclined frame 11, preventing bubbles from being ejected only from the position near the thin tube 12 in the inclined frame 11.

[0051] Two sets of vertical plates 14 are fixedly connected to the top of the aerobic tank 2. Gears 15 are rotatably connected to one side of the vertical plates 14. A chain 16 is connected between the two gears 15 on the same side. A scraper 17 is fixedly connected between the two chains 16. A crossbar 18 is fixedly connected between the gears 15 on different sides. A second motor 19 for driving the gears 15 to rotate is fixedly connected to one side of one of the vertical plates 14. The second motor 19 drives the gears 15 to rotate, which in turn drives the chain 16 to rotate, which in turn drives the scraper 17 to move. The second motor 19 drives the scraper 17 to move back and forth continuously along the liquid surface, pushing the scum on the surface of the aerobic tank 2 into the scum pool 441. The scum inside the scum pool 441 is discharged through the scum holes, realizing the process of cleaning the scum.

[0052] Example 4

[0053] like Figures 1-8As shown, this embodiment is basically the same as embodiment 1. Preferably, the aerobic tank 2 has multiple grooves on its outer side, the top and bottom of which are arc surfaces. A positioning component 20 with one end extending movably to the outside is provided inside the groove. One of the positioning components 20 has an L-shaped plate 21 with both ends extending movably to the outside. The ultra-micro nano bubble generator 41 is installed on the top of the L-shaped plate 21. The positioning component 20 includes two lifting frames 201 that are slidably connected to the inner wall of the groove. A limiting rod 202 that movably passes through the lifting frame 201 is provided between the two sides of the inner wall of the groove. The L-shaped plate 21 extends movably into the inside of the lifting frame 201. A support plate 20 corresponding to the groove is fixedly connected to the outer side of the aerobic tank 2. 3. The staff moves the lifting frame 201 upwards at the location where the equipment needs to be installed in the aerobic tank 2 until the distance between the lifting frame 201 and the support plate 203 exceeds the height of the L-shaped plate 21. At this point, the L-shaped plate 21 is placed against the aerobic tank 2 on the support plate 203. Then, the staff releases the lifting frame 201, and the lifting frame 201 descends along the limiting rod 202 due to its own weight until the lifting frame 201 covers the top of the L-shaped plate 21. At this point, the L-shaped plate 21 is fixed by the lifting frame 201. The equipment can then be installed on the L-shaped plate 21. This increases the number of equipment installation positions on the aerobic tank 2 as needed, making it convenient to install the equipment on the aerobic tank 2. When the equipment is not needed, it will not occupy the surrounding space.

[0054] The present invention also has the following advantages:

[0055] (1) The use of the ultra-micro nano bubble generator makes the dissolved gas efficiency high and the bubble specific surface area large, which can rapidly increase the dissolved oxygen in the water. At the same time, it is small in size and has a charged surface, which can adsorb organic matter in the water and has a stable treatment effect. It adopts mechatronics automatic control, which occupies less space, consumes less energy, is easy to operate and simple to maintain.

[0056] (2) No chemical coagulation is required. The ultra-micro nano bubbles can adhere to the pollutants in the sewage and the biofilm detached from the surface of the combined packing material and float to the surface at the same time to form scum for removal. The equipment investment and operation and maintenance costs are low.

[0057] (3) It is applicable to the treatment of rural and urban domestic sewage and black and odorous water bodies, especially for recalcitrant organic wastewater. It has a very good treatment effect, strong resistance to shock load and high efficiency.

[0058] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A sewage treatment device of super-micro-nano bubble oxygenation coupled with air flotation, comprising an anoxic tank (1) and an aerobic tank (2), characterized in that, The water pipeline (3) is communicated between the anoxic tank (1) and the aerobic tank (2), and the aerobic tank (2) is provided with a gas floating assembly (4) on one side for aeration. The gas floating assembly (4) comprises an ultramicro-nano bubble generating device (41) installed on the side of the aerobic tank (2) away from the anoxic tank (1), a releaser (42) fixedly connected to the inner bottom of the aerobic tank (2), an air inlet pipe (43) communicated between the air outlet of the ultramicro-nano bubble generating device (41) and the releaser (42), and a scum collecting assembly (44) fixedly connected to one side of the inner wall of the aerobic tank (2). The scum collecting assembly (44) comprises a scum tank (441) fixedly connected to the inner wall of the aerobic tank (2), a longitudinal plate (442) slidably connected to the side of the scum tank (441) close to the anoxic tank (1), an inclined plate (443) fixedly connected to one side of the longitudinal plate (442), a bolt (444) provided on one side of the inner wall of the scum tank (441) and movably extended to the outside thereof, a spring (445) fixedly connected between the inclined plate (443) and the scum tank (441), and a notch formed in one side of the longitudinal plate (442) for the spring (445) to pass through. The cylindrical column (9) is rotatably connected between the inner walls of the water pipeline (3) for blocking water from passing through the inside thereof, a plurality of arc-shaped grooves are formed in the outer side of the cylindrical column (9), a first motor (10) is fixedly connected to one side of the water pipeline (3) for driving the cylindrical column (9) to rotate, an inclined frame (11) is fixedly connected to one side of the inner wall of the aerobic tank (2), a plurality of air outlet holes are formed in the top of the inclined frame (11), a thin tube (12) is communicated with one side of the releaser (42), and a trapezoidal frame (13) is communicated between the thin tube (12) and the inclined frame (11). 2.The sewage treatment device of claim 1, wherein, The inner bottom of the aerobic tank (2) is fixedly connected with a baffle (5), and the inside of the anoxic tank (1) and the aerobic tank (2) are fixedly connected with a combined elastic filler (6) with a biological membrane attached to the surface. 3.The sewage treatment device of claim 1, wherein, One side of the anoxic tank (1) is communicated with a water inlet pipe (7), one side of the aerobic tank (2) away from the water inlet pipe (7) is communicated with a water outlet pipe (8), and one side of the scum tank (441) is provided with a scum hole penetrating through the aerobic tank (2). 4.The device according to claim 1, wherein, The top of the aerobic tank (2) is fixedly connected with two groups of vertical plates (14), one side of the vertical plate (14) is rotatably connected with a gear (15), two gears (15) on the same side are transmissionally connected with a chain (16), and two chains (16) are fixedly connected with a scraper (17). 5.The device according to claim 4, wherein, The gears (15) on different sides are fixedly connected with a horizontal rod (18), and one side of one vertical plate (14) is fixedly connected with a second motor (19) for driving the gear (15) to rotate. 6.The device according to claim 1, wherein, The outer side of the aerobic tank (2) is provided with a plurality of recesses, the top and bottom of each recess are arc surfaces, the inside of each recess is provided with a clamping assembly (20) movably extended to the outside thereof, the inside of one clamping assembly (20) is provided with an L-shaped plate (21) movably extended to the outside thereof at both ends, and the ultramicro-nano bubble generating device (41) is installed on the top of the L-shaped plate (21). 7.The device according to claim 6, wherein, The clamping assembly (20) comprises two lifting frames (201) in sliding connection with the inner wall of the groove, a limiting rod (202) movably penetrating the lifting frame (201) is arranged between the two sides of the inner wall of the groove, an L-shaped plate (21) movably extends to the inside of the lifting frame (201), and the outer side of the aerobic tank (2) is fixedly connected with a support plate (203) corresponding to the groove.

8. The use of the sewage treatment device according to any one of claims 1-7, wherein, The method comprises the following steps: Step one, anaerobic treatment, sewage enters the anaerobic tank (1) through the water inlet pipe (7), the combined elastic filler (6) is evenly distributed in the anaerobic tank (1), the sewage is adsorbed and degraded by the biofilm attached to the surface of the combined elastic filler (6) in the anaerobic tank (1), and then enters the water pipeline (3) at the bottom of the anaerobic tank (1); Step two, accelerated centrifugation, the water in the water pipeline (3) enters the arc-shaped groove on the cylinder (9), the first motor (10) on the water pipeline (3) drives the cylinder (9) to rotate, and the water in the water pipeline (3) is accelerated and thrown to the inside of the aerobic tank (2); Step three, ultra-micro-nano bubble air flotation, the ultra-micro-nano bubbles generated by the ultra-micro-nano bubble generating device (41) enter the aerobic tank (2) through the air inlet pipe (43) and are released through the releaser (42), the suspended solids and pollutants in the sewage from the anaerobic tank (1) are attached to the ultra-micro-nano bubbles and float to the water surface to form a scum layer, the second motor (19) drives the scraper (17) to move back and forth along the liquid surface without interruption, and the scum is scraped into the scum tank (441), the scum in the aerobic tank (2) sinks downward and slides along the inclined plate (443) to the top of the releaser (42) and is air floated again, and the scum in the scum tank (441) is discharged through the scum hole; Step four, boost water purification, part of the ultra-micro-nano bubbles in the releaser (42) enter the inclined frame (11) through the fine tube (12) and the trapezoidal frame (13), and then are sprayed obliquely upwards to push the water in the water pipeline (3) into the aerobic tank (2) obliquely upwards; Step five, collect purified water, the sewage with suspended solids passes through the baffle (5) and goes down in the aerobic tank (2), then fully contacts the combined elastic filler (6), forms an aerobic environment under the high-efficiency oxygen dissolving mass transfer effect of the ultra-micro-nano bubbles, is further adsorbed and degraded by the biofilm attached to the surface of the combined elastic filler (6), and the clean water is discharged from the water outlet pipe (8) at the bottom.

Images