MBBR sewage treatment reaction equipment under anaerobic environment

Abstract

The application discloses a kind of MBBR sewage treatment reaction equipment under anaerobic environment related to sewage treatment technical field, the equipment includes reaction bin: it is equipped with installation bin body on it, the surface of installation bin body is fixedly installed with water inlet pipeline for conveying sewage;Filtering mechanism includes four filtering cloths for filtering impurities installed on installation bin body, both ends of each filtering cloth are fixedly installed on clamping column, and the surface of each filtering cloth is fixedly installed with counterweight, the surface of clamping column is fixedly installed with detachable connecting handle;Two moving plates are driven to move towards each other by the cooperation of moving mechanism and moving drive mechanism, and the filtering cloth is centered folded by the action of counterweight, when the folding of filtering cloth is completed, the filtering cloth is extruded by the cooperation of extruding mechanism and energizing mechanism at this time, the sewage adsorbed on the filtering cloth is extruded, to avoid pollution to the outside world when circulating switching by circulating mechanism.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to an MBBR wastewater treatment reactor under anaerobic conditions. Background Technology

[0002] A search revealed that CN116715352B discloses an anaerobic MBBR wastewater treatment reactor, comprising a reactor for holding wastewater and packing material. The reactor has guide paddles installed on both sides of its interior and a suspended filtration mechanism that always floats above the liquid surface. A transverse guide plate, submerged below the liquid surface, is pulled by a biological rope. A packing material injection assembly and aeration pipes are slidably installed at the bottom of the suspended filtration mechanism, penetrating the transverse guide plate and the suspended filtration mechanism. The suspended filtration mechanism performs preliminary filtration and impurity removal on the wastewater poured into the reactor. The suspended filtration mechanism rises and falls with changes in the water level within the reactor, moving the packing material injection assembly to prevent the packing material from accumulating in the reactor during injection and improving the efficiency of biofilm formation on the packing material.

[0003] The wastewater treatment reactor disclosed above filters larger impurities in the wastewater by setting an inclined filter screen at the front end. Although it can remove larger impurities, some impurities in the wastewater are adhesive. The inclined setting of the filter screen cannot make these larger impurities slide down into the collection tank. The impurities adhering to the filter screen will inevitably affect the subsequent water intake efficiency.

[0004] Based on this, the present invention designs an MBBR wastewater treatment reaction device under anaerobic conditions to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an MBBR wastewater treatment reactor under anaerobic conditions, aiming to solve the technical problems existing in the prior art mentioned in the background.

[0006] The present invention is implemented as follows: an MBBR wastewater treatment reactor under anaerobic conditions, the reactor comprising: Reaction chamber: It is equipped with an installation chamber body, and an inlet pipe for conveying sewage is fixedly installed on the surface of the installation chamber body; Filtration mechanism: includes four filter cloths for filtering impurities installed on the mounting chamber. Both ends of each filter cloth are fixedly installed on the snap-fit ​​posts, and a counterweight is fixedly installed on the surface of each filter cloth. The snap-fit ​​posts are fixedly installed with a connecting handle for easy disassembly. Moving mechanism: It works in conjunction with the moving drive mechanism to fold the filter cloth in the center; Extrusion mechanism: Extrudes the filter cloth by cooperating with the energized mechanism; Circulation mechanism: used to drive the filter cloth to circulate and switch.

[0007] Furthermore, the moving mechanism includes a moving plate slidably connected to the filter cloth, the moving plate being slidably connected to the circulation mechanism, two right-angled rods fixedly mounted on the surface of the moving plate, a moving rack fixedly mounted on the surface of the right-angled rods, the moving rack meshing with a rotating gear, the connecting shaft of the rotating gear passing through the circulation mechanism and rotatably connected to the circulation mechanism, the connecting shaft of the rotating gear being connected to the output end of the gear belt assembly, the input end of the gear belt assembly being connected to a rotating rod, the rotating rod passing through the circulation mechanism and rotatably connected to the circulation mechanism, the surface of the rotating rod being fixedly connected to the output end of the bevel gear assembly, and the input end of the bevel gear assembly being connected to the driving bevel gear.

[0008] Furthermore, the moving drive mechanism includes a moving bevel gear that cooperates with the driving bevel gear. The moving bevel gear is slidably connected to the drive shaft. The drive shaft is fixedly connected to the output end of the drive motor. The drive motor is fixedly mounted on a fixed circular platform. The fixed circular platform is fixedly mounted on the water inlet pipe. A moving rod is rotatably mounted on the surface of the moving bevel gear. The moving rod is fixedly connected to the output end of the drive cylinder. The drive cylinder is fixedly mounted on the fixed circular platform.

[0009] Furthermore, the extrusion mechanism includes a movable slider that is slidably connected to the movable plate. The two movable sliders are connected to both ends of the extrusion rod. An upper magnet and a lower magnet are fixedly installed on the surface of the movable slider. Two compression springs are fixedly installed on the surface of the movable slider. A buffer plate is fixedly installed on the end of each compression spring away from the movable slider. An upper electromagnet and a lower electromagnet that cooperate with the upper magnet and the lower magnet are fixedly installed on the surface of the movable plate.

[0010] Furthermore, the energizing mechanism includes an energizing connecting rod fixedly installed on the surface of the movable plate. A conversion connector is fixedly installed on the surface of the energizing connecting rod, and a lower fixing rod is fixedly installed on the surface of the fixed truncated cone. An upper connecting plate and a lower connecting block that cooperate with the conversion connector are respectively fixedly installed on the fixed truncated cone and the lower fixing rod. The energizing connecting rod passes through the circulation mechanism and is slidably connected to the circulation mechanism.

[0011] Furthermore, the circulation mechanism includes a circulation turntable rotatably connected to a fixed frustum. Four fixed frames are fixed inside the circulation turntable. The connecting shaft of the rotating gear passes through the fixed frames and is rotatably connected to the fixed frames. The rotating rod passes through the fixed frames and is rotatably connected to the fixed frames. The energized connecting rods pass through the circulation turntable and the fixed frames in sequence and are all slidably connected to the circulation turntable and the fixed frames. The circulation turntable is driven to rotate by an external rotating device.

[0012] Furthermore, the counterweight is made of soft rubber.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses the combined action of a moving mechanism and a moving drive mechanism to drive two moving plates to move towards each other. At the same time, the counterweight causes the filter cloth to be folded in the center. After the filter cloth is folded, the combined action of a squeezing mechanism and an electrifying mechanism squeezes the filter cloth to squeeze out the sewage adsorbed on the filter cloth, thereby avoiding pollution to the outside world when the circulation mechanism is used for circulation switching.

[0014] 2. The present invention uses a compression spring and a buffer plate to buffer the impact between parts, and the vibration generated helps to drip sewage off the filter cloth, thus avoiding abnormal sewage dripping and contamination on the filter cloth during circulation switching. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an MBBR wastewater treatment reactor under anaerobic conditions, provided in an embodiment of the present invention. Figure 2 This is a schematic cross-sectional view of the present invention; Figure 3 For the present invention Figure 2 A magnified structural diagram at point A; Figure 4 This is a cross-sectional view of an MBBR wastewater treatment reactor under anaerobic conditions according to the present invention. Figure 5 For the present invention Figure 4 A magnified structural diagram at point B; Figure 6 This is a schematic diagram of the exploded structure of some parts of an MBBR wastewater treatment reactor under anaerobic conditions according to the present invention. Figure 7 For the present invention Figure 6 A magnified structural diagram at point C; Figure 8 For the present invention Figure 6 A magnified structural diagram at point D; Figure 9 For the present invention Figure 6 A magnified structural diagram at point E; Figure 10 For the present invention Figure 6 A magnified structural diagram at point F; Figure 11 For the present invention Figure 6 A magnified structural diagram at point G.

[0016] In the attached diagram: 1. Reaction chamber; 101. Installation chamber body; 102. Water inlet pipe; 2. Filtration mechanism; 201. Filter cloth; 202. Snap-fit ​​post; 203. Counterweight; 204. Connecting handle; 3. Moving mechanism; 301. Moving plate; 302. Right-angle column rod; 303. Moving rack; 304. Rotating gear; 305. Gear belt assembly; 306. Rotating rod; 307. Bevel gear assembly; 308. Driving bevel gear; 4. Moving drive mechanism; 401. Moving bevel gear; 402. Drive shaft; 403. Drive shaft... 404. Moving rod; 405. Drive cylinder; 406. Fixed truncated cone; 5. Extrusion mechanism; 501. Extrusion rod; 502. Moving slider; 503. Upper magnet; 504. Lower magnet; 505. Compression spring; 506. Buffer plate; 507. Upper electromagnet; 508. Lower electromagnet; 6. Power supply mechanism; 601. Power supply connecting rod; 602. Converter; 603. Upper connecting plate; 604. Lower fixed rod; 605. Lower connecting block; 7. Circulation mechanism; 701. Circulation turntable; 702. Fixed frame. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but unless otherwise stated, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, in one embodiment, an MBBR wastewater treatment reactor under anaerobic conditions is proposed, the reactor comprising: Reaction chamber 1: It is equipped with a mounting chamber body 101, and an inlet pipe 102 for conveying sewage is fixedly installed on the surface of the mounting chamber body 101; Filtering mechanism 2: includes four filter cloths 201 for filtering impurities installed on the mounting chamber 101. Both ends of each filter cloth 201 are fixedly installed on the snap-fit ​​post 202, and a counterweight 203 is fixedly installed on the surface of each filter cloth 201. A connecting handle 204 for easy disassembly is fixedly installed on the surface of the snap-fit ​​post 202. Moving mechanism 3: In cooperation with moving drive mechanism 4, it drives the filter cloth 201 to be folded in the center; Extrusion mechanism 5: Extrudes the filter cloth 201 by cooperating with the energizing mechanism 6; Circulation mechanism 7: used to drive the filter cloth 201 to circulate and switch.

[0020] In practical applications, when treating wastewater, the wastewater is injected into the installation chamber 101 from the inlet pipe 102 via an external water injection device. Figure 2 As shown, when sewage passes through the inlet pipe 102, the filter cloth 201 filters out viscous impurities in the sewage, thereby achieving the purpose of automatically removing viscous impurities from the sewage. When the injected sewage reaches the corresponding flow rate, such as... Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, at this time, the two moving plates 301 move towards each other through the cooperation of the moving mechanism 3 and the moving drive mechanism 4. At the same time, the filter cloth 201 is folded in the center by the action of the counterweight 203. After the filter cloth 201 is folded, as shown... Figure 3 , Figure 9 and Figure 10 As shown, at this time, the filter cloth 201 is squeezed by the combined action of the squeezing mechanism 5 and the energizing mechanism 6, and the sewage adsorbed on the filter cloth 201 is squeezed out, so as to avoid pollution to the outside world when the circulation mechanism 7 is used for circulation switching.

[0021] like Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 11 As shown, in a preferred embodiment of the present invention, the moving mechanism 3 includes a moving plate 301 slidably connected to the filter cloth 201. The moving plate 301 is slidably connected to the circulation mechanism 7. Two right-angled rods 302 are fixedly mounted on the surface of the moving plate 301. A moving rack 303 is fixedly mounted on the surface of the right-angled rods 302. The moving rack 303 meshes with a rotating gear 304. The connecting shaft of the rotating gear 304 passes through the circulation mechanism 7 and is rotatably connected to the circulation mechanism 7. The connecting shaft of the rotating gear 304 is connected to the output end of the gear belt assembly 305. The input end of the gear belt assembly 305 is connected to a rotating rod 306. The rotating rod 306 passes through the circulation mechanism 7 and is rotatably connected to the circulation mechanism 7. The surface of the rotating rod 306 is fixedly connected to the output end of the bevel gear assembly 307. The input end of the bevel gear assembly 307 is connected to a driving bevel gear 308.

[0022] In practical application, after a certain amount of sewage has been input, the sewage injection is stopped. The drive mechanism 4 then rotates the active bevel gear 308. Figure 3 and Figure 7 As shown, the rotation of the driving bevel gear 308 drives the bevel gear set 307 to rotate, as... Figure 5 As shown, the rotating rod 306 and the gear belt assembly 305 then drive the rotating gear 304 to rotate. The rotating gear 304, through meshing with two rotationally symmetrical movable racks 303, drives the two movable racks 303 to move towards each other. This, in turn, drives the movable plates 301 at both ends of the filter cloth 201 to move towards each other via the right-angle column rod 302. Figure 11 As shown, the filter cloth 201 is folded in the center by the gravity of the counterweight 203, thereby ensuring that the filter cloth 201 is squeezed and drained more fully in the future.

[0023] like Figure 3 As shown, in another preferred embodiment of the present invention, the moving drive mechanism 4 includes a moving bevel gear 401 that cooperates with the driving bevel gear 308. The moving bevel gear 401 is slidably connected to the drive shaft 402. The drive shaft 402 is fixedly connected to the output end of the drive motor 403. The drive motor 403 is fixedly mounted on the fixed frustum 406. The fixed frustum 406 is fixedly mounted on the water inlet pipe 102. A moving rod 404 is rotatably mounted on the surface of the moving bevel gear 401. The moving rod 404 is fixedly connected to the output end of the drive cylinder 405. The drive cylinder 405 is fixedly mounted on the fixed frustum 406.

[0024] In practical applications, after a certain amount of wastewater is input, such as... Figure 3 As shown, at this time, the driving cylinder 405 drives the moving rod 404 to move horizontally, which in turn drives the moving bevel gear 401 to mesh with the driving bevel gear 308. Then, the driving motor 403 drives the driving shaft 402 to rotate. The rotation of the driving shaft 402 drives the moving bevel gear 401 to rotate, which in turn drives the moving mechanism 3 to rotate. The movement of the moving mechanism 3 drives the filter cloth 201 to complete the centering and folding operation.

[0025] like Figure 3 , Figure 6 , Figure 9 and Figure 10As shown, in another preferred embodiment of the present invention, the extrusion mechanism 5 includes a movable slider 502 slidably connected to the movable plate 301. The two movable sliders 502 are connected to both ends of the extrusion rod 501. An upper magnet 503 and a lower magnet 504 are fixedly installed on the surface of the movable sliders 502. Two compression springs 505 are fixedly installed on the surface of the movable sliders 502. A buffer plate 506 is fixedly installed at the end of each compression spring 505 away from the movable slider 502. An upper electromagnet 507 and a lower electromagnet 508 that cooperate with the upper magnet 503 and the lower magnet 504, respectively, are fixedly installed on the surface of the movable plate 301.

[0026] In practical applications, after the filter cloth 201 is folded in the center, as in the embodiments of the present invention... Figure 3 As shown, at this time, the upper electromagnet 507 and the lower electromagnet 508 are energized by the energizing mechanism 6, as... Figure 9 and Figure 10 As shown, after the upper electromagnet 507 and the lower electromagnet 508 are energized, the upper electromagnet 507 has a different magnetism than the upper magnet 503, while the lower electromagnet 508 has the same magnetism as the lower magnet 504. At this time, under the action of magnetic force, the movable slider 502 moves vertically upward to a position close to the filter cloth 201. When the filter cloth 201 is folded in the center by the action of the moving mechanism 3, the magnetism of the upper electromagnet 507 and the lower electromagnet 508 changes under the action of the energizing mechanism 6, thereby causing the movable slider 502 to move vertically upward. Moving straight downwards, the two squeezing rods 501 squeeze the filter cloth 201 to squeeze out excess sewage, thus preventing dripping pollution to the outside world during later switching. At the same time, due to the magnetic force, the squeezing rods 501 move very fast. The compression spring 505 and the buffer plate 506 can buffer the impact between the parts on the one hand, and the vibration generated on the other hand is conducive to the dripping of sewage on the filter cloth 201, avoiding abnormal dripping pollution of sewage on the filter cloth 201 during cycle switching.

[0027] like Figure 3 As shown, in another preferred embodiment of the present invention, the energizing mechanism 6 includes an energizing connecting rod 601 fixedly installed on the surface of the movable plate 301. A conversion connector 602 is fixedly installed on the surface of the energizing connecting rod 601. A lower fixing rod 604 is fixedly installed on the surface of the fixed frustum 406. An upper connecting plate 603 and a lower connecting block 605 that cooperate with the conversion connector 602 are respectively fixedly installed on the fixed frustum 406 and the lower fixing rod 604. The energizing connecting rod 601 passes through the circulation mechanism 7 and is slidably connected to the circulation mechanism 7.

[0028] In practical application, when the filter cloth 201 is folded in the center, the conversion connector 602 contacts the upper electrode plate 603, energizing the upper electromagnet 507 and the lower electromagnet 508. When the filter cloth 201 is folded by the movement of the moving mechanism 3, the moving plate 301 drives the energized connecting rod 601 to move horizontally, thereby causing the conversion connector 602 to slide on the upper electrode plate 603. After the filter cloth 201 is folded in the center, the conversion connector 602 contacts the lower electrode block 605, changing the direction of the current in the upper electromagnet 507 and the lower electromagnet 508, thereby changing the magnetism in the upper electromagnet 507 and the lower electromagnet 508. This causes the moving slider 502 to move vertically downwards through magnetic force, and the squeezing rod 501 squeezes and drains the filter cloth 201, preventing pollution to the outside world.

[0029] like Figure 1 As shown, in another preferred embodiment of the present invention, the circulation mechanism 7 includes a circulation turntable 701 rotatably connected to a fixed frustum 406. Four fixed frames 702 are fixed inside the circulation turntable 701. The connecting shaft of the rotating gear 304 passes through the fixed frame 702 and is rotatably connected to the fixed frame 702. The rotating rod 306 passes through the fixed frame 702 and is rotatably connected to the fixed frame 702. The energized connecting rod 601 passes through the circulation turntable 701 and the fixed frame 702 in sequence and is slidably connected to the circulation turntable 701 and the fixed frame 702. The circulation turntable 701 is driven to rotate by an external rotating device.

[0030] In practical application, after the filter cloth 201 is squeezed, it is reset by reversing the drive. After the reset is completed, the external rotating device drives the circulating turntable 701 to rotate 90 degrees, thereby driving the adjacent filter cloth 201 to switch. The used filter cloth 201 is grabbed and switched by the external device, thereby achieving automatic switching of filter cloth 201 and improving the efficiency of sewage treatment.

[0031] like Figure 11 As shown, in another preferred embodiment of the present invention, the counterweight 203 is made of soft rubber.

[0032] In practical applications, the embodiments of the present invention, such as Figure 11 As shown, by setting it to a rubber material, the counterweight 203 can elastically deform and recover after being squeezed by the compression rod 501, thus avoiding damage to the parts caused by hard compression.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An MBBR wastewater treatment reactor under anaerobic conditions, characterized in that, The device includes: Reaction chamber (1): It is equipped with a mounting chamber body (101), and an inlet pipe (102) for conveying sewage is fixedly installed on the surface of the mounting chamber body (101). Filtering mechanism (2): includes four filter cloths (201) for filtering impurities installed on the mounting chamber (101). Both ends of each filter cloth (201) are fixedly installed on the snap-fit ​​post (202), and a counterweight (203) is fixedly installed on the surface of each filter cloth (201). A connecting handle (204) for easy disassembly is fixedly installed on the surface of the snap-fit ​​post (202). The moving mechanism (3) works in conjunction with the moving drive mechanism (4) to fold the filter cloth (201) in the center; Extrusion mechanism (5): Extrudes the filter cloth (201) by cooperating with the power supply mechanism (6); Circulation mechanism (7): used to drive the filter cloth (201) to circulate and switch.

2. The MBBR wastewater treatment reactor under anaerobic conditions according to claim 1, characterized in that, The moving mechanism (3) includes a moving plate (301) that is slidably connected to the filter cloth (201). The moving plate (301) is slidably connected to the circulation mechanism (7). Two right-angle rods (302) are fixedly installed on the surface of the moving plate (301). A moving rack (303) is fixedly installed on the surface of the right-angle rods (302). The moving rack (303) meshes with a rotating gear (304). The connecting shaft of the rotating gear (304) passes through the circulation mechanism (7) and is rotatably connected to the circulation mechanism (7). The connecting shaft of the rotating gear (304) is connected to the output end of the gear belt assembly (305). The input end of the gear belt assembly (305) is connected to the rotating rod (306). The rotating rod (306) passes through the circulation mechanism (7) and is rotatably connected to the circulation mechanism (7). The surface of the rotating rod (306) is fixedly connected to the output end of the bevel gear assembly (307). The input end of the bevel gear assembly (307) is connected to the active bevel gear (308).

3. The MBBR wastewater treatment reactor under anaerobic conditions according to claim 2, characterized in that, The moving drive mechanism (4) includes a moving bevel gear (401) that cooperates with the active bevel gear (308). The moving bevel gear (401) is slidably connected to the drive shaft (402). The drive shaft (402) is fixedly connected to the output end of the drive motor (403). The drive motor (403) is fixedly mounted on the fixed truncated cone (406). The fixed truncated cone (406) is fixedly mounted on the water inlet pipe (102). A moving rod (404) is rotatably mounted on the surface of the moving bevel gear (401). The moving rod (404) is fixedly connected to the output end of the drive cylinder (405). The drive cylinder (405) is fixedly mounted on the fixed truncated cone (406).

4. The MBBR wastewater treatment reactor under anaerobic conditions according to claim 2, characterized in that, The extrusion mechanism (5) includes a movable slider (502) slidably connected to the movable plate (301). The two movable sliders (502) are connected to both ends of the extrusion rod (501). An upper magnet (503) and a lower magnet (504) are fixedly installed on the surface of the movable slider (502). Two compression springs (505) are fixedly installed on the surface of the movable slider (502). A buffer plate (506) is fixedly installed at the end of each compression spring (505) away from the movable slider (502). An upper electromagnet (507) and a lower electromagnet (508) that cooperate with the upper magnet (503) and the lower magnet (504) respectively are fixedly installed on the surface of the movable plate (301).

5. The MBBR wastewater treatment reactor under anaerobic conditions according to claim 3, characterized in that, The energizing mechanism (6) includes an energizing connecting rod (601) fixedly installed on the surface of the movable plate (301). A conversion connector (602) is fixedly installed on the surface of the energizing connecting rod (601). A lower fixing rod (604) is fixedly installed on the surface of the fixed truncated cone (406). An upper connecting plate (603) and a lower connecting block (605) that cooperate with the conversion connector (602) are fixedly installed on the fixed truncated cone (406) and the lower fixing rod (604). The energizing connecting rod (601) passes through the circulation mechanism (7) and is slidably connected to the circulation mechanism (7).

6. The MBBR wastewater treatment reactor under anaerobic conditions according to claim 5, characterized in that, The circulating mechanism (7) includes a circulating turntable (701) rotatably connected to a fixed truncated cone (406). Four fixed frames (702) are fixed inside the circulating turntable (701). The connecting shaft of the rotating gear (304) passes through the fixed frame (702) and is rotatably connected to the fixed frame (702). The rotating rod (306) passes through the fixed frame (702) and is rotatably connected to the fixed frame (702). The energized connecting rod (601) passes through the circulating turntable (701) and the fixed frame (702) in sequence and is slidably connected to the circulating turntable (701) and the fixed frame (702). The circulating turntable (701) is driven to rotate by an external rotating device.

7. The MBBR wastewater treatment reactor under anaerobic conditions according to claim 1, characterized in that, The counterweight (203) is made of soft rubber.

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