MBBR (Moving Bed Biofilm Reactor) coupling biological filler sewage treatment device

Abstract

The invention relates to the technical field of sewage treatment, in particular to an MBBR (moving bed biofilm reactor) coupling biological filler sewage treatment device which comprises a grating tank, an oxidation reaction zone, a gas stripping reflux zone and a sedimentation tank which are sequentially communicated, and further comprises a grating machine and an impurity removal mechanism. By arranging the material distributing part with the electromagnetic partition plate, automatic dehydration of impurities and magnetic separation of metal substances are achieved in combination with a water permeable hole structure, the resource recovery rate is increased, and the intelligent level of pretreatment is enhanced; and on the other hand, a single-motor multi-linkage mechanism is innovatively adopted, a motor drives a cam to drive an ejector rod assembly to vibrate up and down, meanwhile, a triangular plate connecting rod mechanism drives a brush rod assembly to conduct transverse sweeping, vibration unblocking of the material distributing part and automatic cleaning of the return stroke section of the belt conveyor are achieved, impurity accumulation and belt pollution are effectively prevented, and the working efficiency is improved. The adaptive capacity and reliability of water pollution control and treatment are powerfully improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to an MBBR coupled biological packing wastewater treatment device. Background Technology

[0002] With the acceleration of industrialization and urbanization, water pollution has become increasingly severe, making water pollution control and treatment a key task in the global environmental protection field. Among various wastewater discharge sources, domestic sewage and industrial wastewater contain large amounts of organic matter, suspended solids, and nutrients such as nitrogen and phosphorus. If discharged directly into natural water bodies without effective treatment, they can easily cause a series of environmental problems such as eutrophication and ecosystem imbalance. Therefore, developing efficient, stable, and energy-saving wastewater treatment technologies is of great significance for achieving the sustainable use of water resources.

[0003] In recent years, moving bed biofilm reactor (MBBR) technology has gradually become a research and application hotspot in the field of wastewater treatment due to its unique synergistic mechanism between biofilm and suspended sludge. The MBBR process, by adding a large amount of high specific surface area suspended biological packing material to the aeration tank, enables microorganisms to attach and grow, forming a stable biofilm, significantly improving the biomass concentration and resistance to shock loads within the system. Simultaneously, this process eliminates the need for sludge recirculation or fixed packing supports, offering advantages such as compact structure, stable operation, easy maintenance, and ease of upgrading and retrofitting. It shows broad application prospects in decentralized wastewater treatment and the upgrading of aging wastewater treatment plants.

[0004] However, in actual operation, if the debris in the front end of the existing MBBR system cannot be removed in a timely and effective manner, it can easily cause equipment blockage and affect the normal operation of subsequent processing units. Most of the existing debris removal devices only have conveying functions and lack the ability to identify and sort metal impurities, thus failing to achieve resource recycling. Furthermore, the belt conveyor is prone to sludge adhesion, which can easily lead to slippage, deviation, or secondary pollution during long-term operation. Summary of the Invention

[0005] The purpose of this invention is to provide an MBBR coupled biological packing wastewater treatment device to solve the problems mentioned in the background art.

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

[0007] An MBBR coupled biological packing wastewater treatment device includes a bar screen, an oxidation reaction zone, an air-lift reflux zone, and a sedimentation tank, which are sequentially connected. The device also includes a bar screen machine and a debris removal mechanism. The debris removal mechanism includes a belt conveyor installed on one side of the bar screen and a recovery box. A distribution section is located on the side of the belt conveyor near the recovery box, and an outlet pipe connects the distribution section to the recovery box. A push rod assembly and a brush rod assembly are slidably installed inside the recovery box, with their movement directions perpendicular to each other. A motor is fixedly installed on the recovery box, and a cam is fixedly installed on the motor's output end. The push rod assembly contacts the cam.

[0008] Preferably, the material distribution section includes a support frame, on which a receiving hopper is fixedly installed, and on which a hollow cylinder is rotatably installed. The hollow cylinder is connected to a belt conveyor for transmission, and the receiving hopper is concentrically located inside the hollow cylinder. Electromagnetic partitions are equidistantly installed on the hollow cylinder, and a storage cavity is formed between adjacent electromagnetic partitions. A power supply slip ring body is provided inside the hollow cylinder, and the power supply slip ring body is electrically connected to the excitation coil of each electromagnetic partition through a wire.

[0009] Preferably, it also includes a controller, which is electrically connected to the power supply slip ring body and is used to control the power supply of the electromagnetic partition according to a preset rotation angle.

[0010] Preferably, the hollow cylinder has water permeable holes, a scraper is fixedly installed on the inner wall of the hollow cylinder, and the water outlet pipe is connected to the receiving hopper.

[0011] Preferably, the top rod assembly includes a first slider slidably mounted on the recycling bin, a rod body fixedly mounted on the first slider, a roller rotatably mounted on one end of the rod body near the cam, the roller contacting the cam, and a movable end. The rod body has an installation groove, the movable end is slidably connected in the installation groove, and a spring is fixedly connected between the movable end and the bottom surface of the installation groove.

[0012] Preferably, the brush rod assembly includes a track fixedly installed on the recycling bin, a second slider symmetrically arranged slidably installed on the track, an L-shaped support rod fixedly installed on the second slider, a scraper installed on the L-shaped support rod, the scraper abutting against the belt conveyor, and a triangular plate rotatably installed on the recycling bin, the two ends of the triangular plate being rotatably connected to the first slider and the second slider respectively.

[0013] Preferably, a return pipe is connected between the recycling bin and the bar screen, and a conveying auger is rotatably installed inside the recycling bin, with the conveying auger fixed to the motor output end.

[0014] Preferably, the oxidation reaction zone includes an MBBR aeration tank and a pH sensor, wherein the MBBR aeration tank is filled with suspended biological packing material.

[0015] Preferably, the airlift reflux zone includes a sludge reflux pipeline located at the bottom of the sedimentation tank. An airlift pipe is vertically installed on the sludge reflux pipeline. One side of the airlift pipe is connected to a compressed air injection branch pipe, which is connected to an air source system. Through intermittent air supply, a gas-liquid two-phase flow is formed in the airlift pipe.

[0016] Preferably, the sedimentation tank includes a central inlet pipe, an inclined plate, a water collection tank, and a sludge hopper. The inner wall of the sedimentation tank is equipped with a liquid level sensor for monitoring water level changes and for linkage with the inlet valve.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. On the one hand, by setting up a material distribution section with electromagnetic baffles in the post-grid processing unit, combined with the permeable hole structure on the hollow cylinder wall, automatic dehydration and classification of impurities are achieved. During the impurity conveying process, free water is released through the permeable holes and flows back to the front-end processing system through the outlet pipe, reducing ineffective load; at the same time, the electromagnetic baffles are energized and de-energized according to the rotation angle under the precise control of the controller, selectively adsorbing ferromagnetic metal impurities, such as iron nails, steel sheets, and metal packaging fragments, to achieve automatic separation and resource recycling of metal and non-metal waste; on the other hand, an innovative "single motor multi-linkage" mechanical mechanism is adopted: a single motor drives the cam to rotate, which drives the top rod assembly to move up and down reciprocally, applying periodic vibration to the material distribution section, effectively loosening impurities stuck in the gaps of the electromagnetic baffles and preventing blockage; at the same time, the vertical motion is converted into horizontal reciprocating sliding through the triangular plate linkage mechanism, driving the brush rod assembly to continuously clean the bottom surface of the conveyor belt return section, removing attached sludge and sticky residues, avoiding secondary pollution, and significantly improving the adaptability and reliability of pollution control and treatment.

[0019] 2. By installing a return pipe between the recycling bin and the bar screen, the filtrate, leachate, and fine suspended solids generated during cleaning are returned to the main system for treatment, avoiding secondary pollution; the built-in conveying auger is driven by the same motor, realizing continuous and closed discharge of impurities, ensuring a clean on-site environment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the impurity removal mechanism of the present invention;

[0022] Figure 3 This is a schematic diagram of the material distribution section of the present invention;

[0023] Figure 4 This is a schematic diagram of the recycling bin structure of the present invention;

[0024] Figure 5 for Figure 4 Enlarged view of the A-structure;

[0025] Figure 6 This is a schematic diagram of the push rod assembly structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the oxidation reaction zone, air stripping reflux zone, and sedimentation tank structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the internal plan of the sedimentation tank of the present invention.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 100. Bar screen; 110. Bar screen machine;

[0030] 200. Oxidation reaction zone; 210. MBBR aeration tank; 220. pH sensor;

[0031] 300. Airlift return zone; 310. Sludge return pipeline; 320. Airlift pipe; 330. Compressed air injection branch pipe;

[0032] 400. Sedimentation tank; 410. Central inlet pipe; 420. Inclined plate; 430. Water collection tank; 440. Sludge hopper; 450. Liquid level sensor;

[0033] 500. Impurity removal mechanism; 510. Belt conveyor; 520. Recycling bin; 521. Sewage return pipe; 530. Material distribution section; 531. Water outlet pipe; 532. Support frame; 533. Receiving hopper; 534. Hollow cylinder; 535. Electromagnetic partition; 536. Power supply slip ring body; 537. Controller; 540. Top rod assembly; 541. First slider; 542. Rod body; 543. Roller; 544. Movable end; 545. Spring; 550. Brush rod assembly; 551. Track; 552. Second slider; 553. L-shaped support rod; 554. Scraper; 555. Triangular plate; 560. Motor; 570. Cam; 580. Conveying auger; 501. Storage chamber; 502. Water permeable hole; 503. Scraper; 504. Mounting groove. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1: As Figure 1 - Figure 8 The MBBR coupled biological packing wastewater treatment device shown includes a bar screen 100, an oxidation reaction zone 200, an air lift reflux zone 300, and a sedimentation tank 400. The bar screen 100, oxidation reaction zone 200, air lift reflux zone 300, and sedimentation tank 400 are connected in sequence to form a complete wastewater treatment process. It also includes a bar screen 110 and a debris removal mechanism 500.

[0036] Specifically, the impurity removal mechanism 500 includes a belt conveyor 510 and a recycling bin 520 installed on one side of the bar screen 100. The belt conveyor 510 has a material distribution section 530 on the side near the recycling bin 520. A water outlet pipe 531 connects the material distribution section 530 and the recycling bin 520. A push rod assembly 540 and a brush rod assembly 550 are slidably installed inside the recycling bin 520. The movement directions of the push rod assembly 540 and the brush rod assembly 550 are perpendicular to each other. A motor 560 is fixedly installed on the recycling bin 520. A cam 570 is fixedly installed on the output end of the motor 560. The push rod assembly 540 is in contact with the cam 570.

[0037] In the pretreatment stage, wastewater first enters the bar screen 100, where preliminary solid-liquid separation is performed by a bar screen 110 installed inside the screen. The bar screen 110 is a rotary rake bar screen or a stepped bar screen, with a preferred bar spacing of 5-10 mm. It effectively intercepts large suspended particles in the wastewater, such as plastic fragments, fibers, vegetable leaves, and paper scraps. The intercepted impurities are lifted upwards by the bar screen chain and transported to the slag outlet, where they automatically fall off under gravity onto the inclined belt conveyor 510 below. The belt conveyor 510 has anti-slip textures or edge structures on its surface, which stably carries the wet impurities and continuously transports them to the final discharge area.

[0038] During the material distribution and dewatering stage: impurities fall from the belt conveyor 510 into the material distribution section 530. Under the action of gravity, the impurities are initially dewatered. The filtrate flows back to the front end of the system for reprocessing through the outlet pipe 531. At the same time, after the motor 560 starts, it drives the cam 570 on its output shaft to rotate. The cam 570 pushes the push rod assembly 540 to make periodic up and down reciprocating motion. The top of the push rod assembly 540 intermittently abuts against the material distribution section 530, forming a mechanical impact and generating a slight vibration, which effectively loosens the impurities stuck in the gaps of the material distribution section 530 and promotes their smooth fall into the recycling box 520, avoiding accumulation and blockage. In addition, the up and down movement of the push rod assembly 540 drives the brush rod assembly 550 to make horizontal reciprocating sliding inside the recycling box 520 through the hinged connecting rod. Its movement trajectory covers the bottom surface of the return section of the belt conveyor 510, which is used to remove the sticky residues attached to the back of the belt, realize the automatic reverse cleaning of the belt conveyor 510, and ensure its long-term stable operation.

[0039] Subsequent treatment stage: After impurity removal, the wastewater enters the oxidation reaction zone 200, where a biofilm is formed on the surface of the suspended biological packing material, which efficiently degrades organic matter and completes the nitrification process. Then, it enters the sedimentation tank 400 for sludge-water separation. The sludge is returned to the front end through the air lift return zone 300, and the supernatant is discharged in compliance with standards.

[0040] Reference Figure 3 The material distribution unit 530 includes a support frame 532, on which a receiving hopper 533 is fixedly mounted. A hollow cylinder 534 is rotatably mounted on the support frame 532 and is connected to the belt conveyor 510. The receiving hopper 533 is concentrically located inside the hollow cylinder 534. Specifically, the hollow cylinder 534 has water permeable holes 502, and a scraper 503 is fixedly mounted on the inner wall of the hollow cylinder 534. A water outlet pipe 531 is connected to the receiving hopper 533. Electromagnetic partitions 535 are equidistantly mounted on the hollow cylinder 534, and each electromagnetic partition 535 has a [missing information - likely a component or material]. The excitation coil, with its core made of soft iron or silicon steel, forms an electromagnet structure. When energized, it generates a strong magnetic field that selectively attracts impurities containing ferromagnetic metals, such as iron filings, steel nails, and metal packaging fragments. After power is cut off, the magnetism disappears rapidly, allowing the impurities to fall off automatically under gravity or vibration. A storage cavity 501 is formed between adjacent electromagnetic partitions 535. To ensure stable power supply to the electromagnetic partitions 535 during rotation, a power supply slip ring body 536 is provided inside the hollow cylinder 534. This body includes a conductive ring fixed to the rotating shaft and a brush assembly that slides in contact with it. Wires are led out from the slip ring, and the power supply slip ring body 536 is electrically connected to the excitation coils of each electromagnetic partition 535 via wires, ensuring continuous power transmission during continuous rotation.

[0041] Furthermore, it also includes a controller 537, which is electrically connected to the power supply slip ring body 536. The controller 537 has a built-in angle sensor to monitor the rotation angle of the hollow cylinder 534 in real time, and is used to control the on and off of the electromagnetic partition 535 according to the preset rotation angle, and to control the on and off timing of each electromagnetic partition 535 according to the preset program.

[0042] Impurities are conveyed to the end by the belt conveyor 510, fall into the receiving hopper 533, and then enter the storage chamber 501 inside the hollow cylinder 534. During the slow rotation of the hollow cylinder 534, the free water in the impurities is released through the water permeable hole 502 under the action of gravity and flows back to the front-end treatment system through the water outlet pipe 531. At the same time, the scraper 503 on the inner wall rotates with the cylinder and periodically scrapes away excess sewage. The controller 537 precisely controls the on and off of the corresponding electromagnetic partition 535 according to the current rotation angle of the hollow cylinder 534. When the power is turned on in the feeding area, it adsorbs metal impurities. When the power is turned off in the discharge area, it releases the impurities into the recycling box 520. With the up and down reciprocating motion of the top rod assembly 540, it applies an impact to the support structure of the hollow cylinder 534, generating a slight vibration, which further promotes the falling off of impurities. The brush rod assembly 550 simultaneously performs lateral cleaning to clean the surface of the return section of the belt conveyor 510, realizing fully automated cleaning throughout the process.

[0043] Reference Figure 4 and Figure 5 and Figure 6 The push rod assembly 540 includes a first slider 541 slidably mounted on the recycling bin 520, a rod 542 fixedly mounted on the first slider 541, a roller 543 rotatably mounted on one end of the rod 542 near the cam 570, the roller 543 contacting the cam 570, and a movable end 544. The rod 542 has an installation groove 504, the movable end 544 is slidably connected in the installation groove 504, and a spring 545 is fixedly connected between the movable end 544 and the bottom surface of the groove 504.

[0044] After the motor 560 starts, it drives the cam 570 on its output shaft to rotate. The eccentric profile of the cam 570 pushes the roller 543 that is in rolling contact with it, causing the entire rod 542 and the first slider 541 to move upward along the guide structure. When the rod 542 rises to the top of its stroke, its movable end 544 abuts against the material distribution section 530 and applies an upward impact force. Because of the spring 545, the movable end 544 can retract appropriately at the moment of impact to avoid structural damage caused by rigid collision. At the same time, it prolongs the impact time and enhances the vibration transmission effect. When the cam 570 continues to rotate to the lowest position, the push rod assembly 540 falls back downward under the action of gravity and the reset action of the spring 545, preparing for the next impact.

[0045] Reference Figure 5The brush rod assembly 550 includes a track 551 fixedly installed on the recycling bin 520, a second slider 552 symmetrically arranged slidingly installed on the track 551, an L-shaped support rod 553 fixedly installed on the second slider 552, a scraper 554 installed on the L-shaped support rod 553, the scraper 554 abutting against the belt conveyor 510, and a triangular plate 555 rotatably installed on the recycling bin 520, with both ends of the triangular plate 555 rotatably connected to the first slider 541 and the second slider 552 respectively.

[0046] When the first slider 541 reciprocates, it pulls one end of the triangular plate 555 to rise or fall, causing the entire triangular plate 555 to swing around the axis. The swing of the triangular plate 555 is converted into the sliding of the second sliders 552 on both sides on the track 551, which drives the L-shaped support rod 553 and the scraper 554 to perform horizontal reciprocating motion. During the reciprocating motion, the scraper 554 continuously rubs the return bottom surface of the belt conveyor 510, scraping off the adhering sludge, debris and other impurities into the recycling box 520 for centralized processing. The same power source simultaneously completes the two tasks of vibration deslagging of the material distribution section 530 and self-cleaning of the belt conveyor 510, significantly improving the system integration and energy efficiency ratio.

[0047] Reference Figure 2 A return pipe 521 is connected between the recycling bin 520 and the bar screen 100. A conveying auger 580 is rotatably installed inside the recycling bin 520, and the conveying auger 580 is fixed to the output end of the motor 560.

[0048] Motor 560 drives conveyor auger 580 to rotate, and its spiral blades push the sewage falling into the bottom of the tank axially, and discharge it back to the front end of the system for reprocessing through sewage return pipe 521.

[0049] Example 2: This example is consistent with Example 1 in basic structure and process, including a bar screen 100, an oxidation reaction zone 200, an air-lift reflux zone 300, and a sedimentation tank 400 connected sequentially along the sewage flow direction. The specific structure of each functional unit has been optimized, further improving the system's automation control level and operational stability. (Refer to...) Figure 1 and Figure 7 and Figure 8The oxidation reaction zone 200 includes an MBBR aeration tank 210 and a pH sensor 220. The MBBR aeration tank 210 is a rectangular or circular reinforced concrete structure. The MBBR aeration tank 210 is filled with suspended biological packing material, preferably polyethylene or polypropylene material with high specific surface area. The shape can be cylindrical, hollow sphere, or polyhedral ring. The density is less than that of water, so it can be freely suspended under aeration disturbance and maintain a good fluidization state. The filling rate is controlled between 30% and 40%. A multi-layer biofilm is enriched on the surface of the material, containing functional microbial communities such as heterotrophic bacteria, nitrifying bacteria, denitrifying bacteria, and polyphosphate-accumulating bacteria. Under aerobic conditions, it efficiently degrades organic pollutants and completes the nitrification of ammonia nitrogen at the same time. In the local anoxic area, it achieves denitrification and denitrification, and has a strong ability to remove nitrogen and phosphorus simultaneously.

[0050] The pH sensor 220 is fixedly installed on the side wall of the MBBR aeration tank 210 or suspended below the liquid surface to monitor pH changes in the reaction zone in real time. Its signal output is connected to the central PLC. When the pH deviates from the suitable range, the dosing system is automatically activated to add acid or alkali solutions for adjustment, ensuring that the microorganisms are in the optimal growth environment and avoiding a decrease in biological activity due to fluctuations in the influent water quality.

[0051] The MBBR aeration tank 210 is equipped with a microporous aerator array at the bottom, which is supplied with air by a blower. The air-to-water ratio is controlled at 8:1 to 12:1, which not only meets the dissolved oxygen requirements, but also provides sufficient upward airflow to maintain uniform fluidization of the packing.

[0052] The airlift return zone 300 is used to return a portion of the sludge from the bottom of the sedimentation tank 400 to the front-end treatment unit to maintain sufficient biomass concentration in the system. It includes a sludge return pipe 310 installed at the bottom of the sedimentation tank 400, with an airlift pipe 320 vertically installed on the sludge return pipe 310. One side of the airlift pipe 320 is connected to a compressed air injection branch pipe 330, which is connected to an air source system. Through intermittent air supply, a gas-liquid two-phase flow is formed in the airlift pipe 320. Utilizing the density difference between the gas-liquid mixture and the surrounding liquid, an upward flow force is generated under static pressure, thereby continuously lifting the high-concentration activated sludge from the bottom of the sedimentation tank 400 and returning it to the MBBR aeration tank 210 through a conveying pipeline. The return ratio is adjustable from 50% to 90%. This airlift return method does not require the use of a mechanical sludge pump, completely avoiding the problems of clogging, wear, and frequent maintenance that are prone to occur in traditional pumping systems.

[0053] The sedimentation tank 400 includes a central inlet pipe 410, an inclined plate 420, a water collection trough 430, and a sludge hopper 440. The inner wall of the sedimentation tank 400 is equipped with a liquid level sensor 450, which is used to monitor water level changes and is linked with the inlet valve. When the water level exceeds the safety threshold, the front inlet valve is automatically closed to prevent overflow accidents. When the water level returns to normal, the inlet valve is reopened to achieve intelligent interlock protection.

[0054] Wastewater enters the MBBR aeration tank 210 after large particulate impurities are removed by the screen tank 100. Under the action of the biofilm on the surface of the suspended biological packing, organic matter is degraded and nitrogen and phosphorus are removed. The pH sensor 220 monitors the reaction environment in real time, and the PLC automatically adjusts the pH value according to the feedback signal to ensure the activity of microorganisms. The treated mixed liquor flows into the sedimentation tank 400 and is accelerated to settle by the inclined plate 420. The clear water is collected and discharged by the collection tank 430, and the sludge settles into the sludge hopper 440. Some of the sludge is returned to the MBBR aeration tank 210 through the air lift return zone 300 to maintain the biomass balance of the system. The level sensor 450 continuously monitors the water level in the sedimentation tank 400 and automatically cuts off the water supply in case of abnormality to ensure the safe operation of the system.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment device with MBBR coupled biological packing material, characterized in that, It includes a bar screen (100), an oxidation reaction zone (200), an air stripping reflux zone (300), and a sedimentation tank (400), which are connected in sequence. It also includes a bar screen machine (110) and a cleaning mechanism (500). The impurity removal mechanism (500) includes a belt conveyor (510) and a recycling bin (520) installed on one side of the grid pool (100). The belt conveyor (510) has a material distribution section (530) on the side near the recycling bin (520). A water outlet pipe (531) is connected between the material distribution section (530) and the recycling bin (520). A top rod assembly (540) and a brush rod assembly (550) are slidably installed inside the recycling bin (520). The movement directions of the top rod assembly (540) and the brush rod assembly (550) are perpendicular to each other. A motor (560) is fixedly installed on the recycling bin (520). A cam (570) is fixedly installed on the output end of the motor (560). The top rod assembly (540) is in contact with the cam (570).

2. The MBBR coupled biological packing wastewater treatment device according to claim 1, characterized in that: The material distribution section (530) includes a support frame (532), on which a receiving hopper (533) is fixedly installed. A hollow cylinder (534) is rotatably installed on the support frame (532). The hollow cylinder (534) is connected to the belt conveyor (510) for transmission. The receiving hopper (533) is concentrically located inside the hollow cylinder (534). Electromagnetic partitions (535) are installed at equal intervals on the hollow cylinder (534), and a storage cavity (501) is formed between adjacent electromagnetic partitions (535). A power supply slip ring body (536) is provided inside the hollow cylinder (534), and the power supply slip ring body (536) is electrically connected to the excitation coil of each electromagnetic partition (535) through a wire.

3. The MBBR coupled biological packing wastewater treatment device according to claim 2, characterized in that: It also includes a controller (537), which is electrically connected to the power supply slip ring body (536) and is used to control the power supply of the electromagnetic partition (535) according to a preset rotation angle.

4. The MBBR coupled biological packing wastewater treatment device according to claim 2, characterized in that: The hollow cylinder (534) has a water-permeable hole (502), a scraper (503) is fixedly installed on the inner wall of the hollow cylinder (534), and the water outlet pipe (531) is connected to the receiving hopper (533).

5. The MBBR coupled biological packing wastewater treatment device according to claim 1, characterized in that: The top rod assembly (540) includes a first slider (541) slidably mounted on a recycling bin (520), a rod (542) fixedly mounted on the first slider (541), a roller (543) rotatably mounted on one end of the rod (542) near the cam (570), the roller (543) contacting the cam (570), and a movable end (544). The rod (542) has an installation groove (504) and the movable end (544) is slidably connected in the installation groove (504). A spring (545) is fixedly connected between the movable end (544) and the bottom surface of the groove (504).

6. The MBBR coupled biological packing wastewater treatment device according to claim 4, characterized in that: The brush rod assembly (550) includes a track (551) fixedly installed on the recycling bin (520), a second slider (552) symmetrically arranged sliding on the track (551), an L-shaped support rod (553) fixedly installed on the second slider (552), a scraper (554) installed on the L-shaped support rod (553), the scraper (554) abutting against the belt conveyor (510), and a triangular plate (555) rotatably installed on the recycling bin (520), the two ends of the triangular plate (555) being rotatably connected to the first slider (541) and the second slider (552) respectively.

7. The MBBR coupled biological packing wastewater treatment device according to claim 1, characterized in that: A return pipe (521) is connected between the recycling bin (520) and the bar screen (100). A conveying auger (580) is rotatably installed inside the recycling bin (520), and the conveying auger (580) is fixed to the output end of the motor (560).

8. The MBBR coupled biological packing wastewater treatment device according to claim 1, characterized in that: The oxidation reaction zone (200) includes an MBBR aeration tank (210) and a pH sensor (220), wherein the MBBR aeration tank (210) is filled with suspended biological packing material.

9. The MBBR coupled biological packing wastewater treatment device according to claim 1, characterized in that: The air lift reflux zone (300) includes a sludge reflux pipeline (310) located at the bottom of the sedimentation tank (400). An air lift pipe (320) is vertically installed on the sludge reflux pipeline (310). A compressed air injection branch pipe (330) is connected to one side of the air lift pipe (320). The compressed air injection branch pipe (330) is connected to an air source system. Through intermittent air supply, a gas-liquid two-phase flow is formed in the air lift pipe (320).

10. The MBBR coupled biological packing wastewater treatment device according to claim 1, characterized in that: The sedimentation tank (400) includes a central inlet pipe (410), an inclined plate (420), a water collection tank (430), and a sludge hopper (440). The inner wall of the sedimentation tank (400) is equipped with a liquid level sensor (450) for monitoring water level changes and linking with the inlet valve.

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