Biochemical pool for sewage treatment

Abstract

The utility model relates to a biochemical pool for sewage treatment, and relates to the technical field of sewage treatment equipment, the biochemical pool comprises a pool body, a mounting frame and a feeding box, the pool body is of a top opening structure, and a water inlet pipe and a water outlet pipe are arranged on the pool body in a communicating manner; a water pump is mounted on the drainage pipe; the mounting frame is arranged at the top of the tank body; the feeding box is arranged on the mounting frame, and the feeding box is of a structure with an opening in the top; a feeding pipe is arranged at the bottom of the feeding box in a communicating manner; an adjusting assembly is arranged on the feeding box, and the adjusting assembly is used for adjusting the communication state of the feeding pipe; a first driving assembly and a second driving assembly are arranged on the pool body, the first driving assembly is used for driving the feeding box to move in the length direction of the pool body, and the second driving assembly is used for driving the feeding box to move in the width direction of the pool body. The sewage treatment efficiency of the biochemical pool can be improved.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment equipment technology, and in particular to a biochemical tank for wastewater treatment. Background Technology

[0002] The treatment of domestic sewage generally includes primary treatment, secondary treatment and tertiary treatment. Primary treatment removes solid impurities and suspended pollutants from sewage through filtration and sedimentation. Secondary treatment uses microorganisms to decompose organic pollutants in sewage. Tertiary treatment uses chemical reactions to remove nitrogen and phosphorus from sewage, as well as remove recalcitrant inorganic salts.

[0003] In the secondary treatment of domestic sewage, the sewage is usually transported to a biological treatment tank. The biological treatment tank is pre-filled with a solution containing biological sludge. After the sewage enters the biological treatment tank, the microorganisms contained in the biological sludge decompose the organic pollutants in the sewage. After the sewage stays in the biological treatment tank for a certain period of time, the organic pollutants contained in it are completely decomposed, and the sewage is discharged from the biological treatment tank into the subsequent sewage treatment station, where the biological treatment tank can continue to treat the sewage that enters next.

[0004] During the secondary treatment of the aforementioned wastewater, when the wastewater is discharged from the biochemical tank, the microorganisms in the biochemical tank will inevitably be carried out of the biochemical tank, resulting in the loss of microorganisms in the biochemical tank. As the wastewater treatment progresses, the wastewater treatment efficiency of the biochemical tank gradually decreases. Utility Model Content

[0005] In order to improve the sewage treatment efficiency of the biological treatment tank, this application provides a biological treatment tank for sewage treatment.

[0006] This application provides a biological treatment tank for wastewater, which adopts the following technical solution:

[0007] A biological treatment tank for wastewater includes a tank body, a mounting frame, and a feeding box. The tank body has a top-opening structure, and an inlet pipe and a drain pipe are connected to the tank body. A water pump is installed on the drain pipe. The mounting frame is located at the top of the tank body. The feeding box is located on the mounting frame and has a top-opening structure. A feeding pipe is connected to the bottom of the feeding box. An adjustment component is provided on the feeding box to adjust the connection state of the feeding pipe. A first driving component and a second driving component are provided on the tank body. The first driving component is used to drive the feeding box to move along the length direction of the tank body, and the second driving component is used to drive the feeding box to move along the width direction of the tank body.

[0008] By adopting the above technical solution, during the secondary treatment of sewage, the sewage is transported to the tank through the inlet pipe. The tank is pre-filled with a solution containing biological sludge. After the sewage enters the tank, the microorganisms contained in the biological sludge decompose the organic pollutants in the sewage. After the sewage stays in the biological tank for a certain period of time, the organic pollutants contained therein are completely decomposed. The sewage is then discharged from the tank through the drain pipe by the water pump and enters the subsequent sewage treatment station, thus completing the secondary treatment of the sewage.

[0009] During secondary wastewater treatment, operators first add a measured amount of microbial-rich sludge cake to the feeding tank. Then, using the first and second drive components, the feeding tank moves both along the length and width of the tank. During this process, an adjusting component keeps the feeding pipe connected. The sludge cake in the feeding tank falls through the feeding pipe under its own gravity to various parts of the tank, continuously replenishing the microorganisms within and preventing a decrease in the microbial content caused by wastewater carrying microorganisms during discharge. This ensures efficient wastewater treatment. Furthermore, the sludge cake falls evenly to all locations within the tank, ensuring thorough dissolution and further improving the treatment efficiency.

[0010] Optionally, the adjustment assembly includes a fixed plate, an adjustment plate, and an adjustment motor; the fixed plate is coaxially fixed inside the feeding tube; the fixed plate has at least one discharge port along its circumference; at least one adjustment plate is provided, each adjustment plate corresponding to one discharge port, and the adjustment plate abuts against the fixed plate; the adjustment motor is fixedly mounted on the feeding box, the output shaft of the adjustment motor is coaxially arranged with the fixed plate, and the adjustment plate is fixedly connected to the output shaft of the adjustment motor.

[0011] By adopting the above technical solution, initially, the regulating motor stops working, and the regulating plate is located at the opening of the feed inlet, so that both ends of the feed pipe are in a disconnected state. When the sludge cake is fed, the regulating motor is in working state, and the regulating motor drives the regulating plate to rotate. When the regulating plate rotates, it moves away from the feed inlet, so that both ends of the feed pipe are connected, thereby realizing the adjustment of the connection state of the feed pipe.

[0012] When the regulating plate rotates, it cuts the sludge cake in the feeding box, breaking it into smaller pieces. This not only makes it easier for the sludge cake to fall from the discharge port, but also accelerates the dissolution rate of the sludge cake in the sewage. This advances the time when the microorganisms contained in the sludge cake begin to treat the sewage, thus improving the sewage treatment efficiency of the biological treatment tank.

[0013] Optionally, two sets of the first drive components are provided, respectively located on both sides of the length direction of the pool body; the first drive component includes a first driving sprocket, a first driven sprocket, and a first chain; the first driving sprocket is rotatably mounted on the pool body; at least one first driven sprocket is provided and rotatably connected to the pool body; the first chain is wound around the first driving sprocket and the first driven sprocket, and the first chain is engaged with both the first driving sprocket and the first driven sprocket; the mounting bracket is slidably mounted on the pool body, and both ends of the mounting bracket are fixedly connected to two of the first chains; a first motor is fixedly mounted on the pool body, and the first motor is used to drive the first driving sprocket to rotate.

[0014] By adopting the above technical solution, the first motor drives the first active sprocket to rotate repeatedly, thereby driving the mounting frame to slide back and forth along the length of the pool body through the first chain and the first driven sprocket. Since the feeding box is set on the mounting frame, the feeding box is driven to move along the length of the pool body.

[0015] Optionally, the length direction of the mounting frame is the same as the width direction of the pool body; two sets of the second drive components are provided, and are respectively located on both sides of the length direction of the mounting frame; the second drive component includes a second driving sprocket, a second driven sprocket, and a second chain; the second driving sprocket is rotatably mounted on the mounting frame; at least one second driven sprocket is provided and is rotatably connected to the mounting frame; the second chain is wound around the second driving sprocket and the second driven sprocket, and the second chain is engaged with both the second driving sprocket and the second driven sprocket; the feeding box is slidably mounted on the mounting frame, and the feeding box is fixedly connected to both second chains; a second motor is fixedly mounted on the mounting frame, and the second motor is used to drive the second driving sprocket to rotate.

[0016] By adopting the above technical solution, the second motor drives the second drive sprocket to rotate repeatedly, thereby enabling the feeding box to move along the width direction of the pool body through the second chain and the second driven sprocket.

[0017] Optionally, a controller is fixedly installed on the pool body, and the controller is electrically connected to the regulating motor, the first motor and the second motor.

[0018] By adopting the above technical solution, the speed of the motor, the first motor and the second motor are controlled and adjusted by the controller, so that the speed at which the feeding box moves along the length and width of the pool body matches the speed at which the sludge cake falls from the feeding box. This ensures the efficiency of replenishing the sludge cake in the pool body and prevents the waste of sludge cake.

[0019] Optionally, a first electric valve is installed on the water inlet pipe; a second electric valve is installed on the water outlet pipe; the first electric valve, the second electric valve, and the water pump are all electrically connected to the controller.

[0020] By adopting the above technical solution, the connection status of the inlet and outlet pipes is controlled by the first and second electric valves respectively, ensuring that the amount of sewage in the tank matches the amount of microorganisms in the tank. This improves sewage treatment efficiency while ensuring that the sewage volume does not exceed the treatment capacity of the microorganisms. The controller adjusts the working status of the first and second electric valves, achieving automation of sewage treatment and facilitating its processing.

[0021] Optionally, the pool body is provided with an aeration assembly, which includes an air supply pipe, an aeration head, and an air pump; the air supply pipe passes through the pool body, and the portion of the air supply pipe inside the pool body is located at the bottom of the pool body; several aeration heads are provided on the air supply pipe, and the aeration heads are connected to the air supply pipe; the air pump is installed on the air supply pipe, and the air pump is used to deliver outside air to the aeration heads and discharge it into the pool body through the aeration heads.

[0022] By adopting the above technical solution, during the secondary treatment of sewage, an air pump is used to deliver outside air to the aeration head, and then discharges it into the tank through the aeration head, providing sufficient oxygen for the microorganisms in the tank, thereby ensuring the efficiency of microorganisms in decomposing organic pollutants in sewage.

[0023] Optionally, the portion of the air supply pipe inside the pool body is laid out in an S-shape to cover the entire pool body; the aeration heads are evenly distributed on the air supply pipe.

[0024] By adopting the above technical solution, oxygen can be uniformly delivered to microorganisms throughout the pool, further ensuring the efficiency of microorganisms in decomposing organic pollutants in wastewater.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By setting up a feeding box, microorganisms are continuously replenished into the tank, avoiding the decrease in the microbial content in the tank due to the microorganisms carried by the sewage during discharge, thereby ensuring the efficiency of sewage treatment.

[0027] 2. By setting up the first drive component and the second drive component, the sludge cake can be evenly dropped to various positions in the tank, ensuring that the sludge cake can be fully dissolved in various positions in the tank, thereby further improving the treatment efficiency of sewage in the tank.

[0028] 3. By setting a controller, the speed at which the feeding box moves along the length and width of the pool is matched with the speed at which the sludge cake falls from the feeding box, thereby ensuring the efficiency of replenishing the sludge cake in the pool and preventing waste of the sludge cake. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0030] Figure 2 This is a cross-sectional view of an embodiment of this application;

[0031] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0032] Figure 4 This is a schematic diagram of the structure of the adjustment component in an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Pool body; 11. Inlet pipe; 111. First electric valve; 12. Drain pipe; 121. Water pump; 122. Second electric valve; 13. First motor; 14. Second motor; 15. Controller;

[0035] 2. Mounting bracket;

[0036] 3. Feeding box; 31. Feeding pipe;

[0037] 4. Adjustment component; 41. Fixing plate; 411. Feed port; 42. Adjustment plate; 43. Adjustment motor;

[0038] 5. First drive assembly; 51. First drive sprocket; 52. First driven sprocket; 53. First chain;

[0039] 6. Second drive assembly; 61. Second drive sprocket; 62. Second driven chain; 63. Second chain;

[0040] 7. Aeration components; 71. Air supply pipe; 72. Aeration head; 73. Air pump. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0042] This application discloses a biological treatment tank for wastewater treatment. (Refer to...) Figure 1 and Figure 2The wastewater treatment biological treatment tank includes a tank body 1, which is horizontally positioned and has a rectangular cross-section. The tank body 1 has an open top structure. Biological sludge is pre-installed inside the tank body 1. An inlet pipe 11 and an outlet pipe 12 are respectively installed at both ends along the length of the tank body 1. Both the inlet pipe 11 and the outlet pipe 12 are connected to the interior of the tank body 1. The connection point between the inlet pipe 11 and the tank body 1 is located at the top of the side wall of the tank body 1, and the connection point between the outlet pipe 12 and the tank body 1 is located at the bottom of the side wall of the tank body 1.

[0043] A water pump 121 is fixedly installed on the drain pipe 12. The water pump 121 is used to discharge the sewage in the tank 1 through the drain pipe 12 to the subsequent sewage treatment station. It should be noted that the power for the sewage to enter the tank 1 through the inlet pipe 11 comes from the upstream sewage treatment station.

[0044] A first electric valve 111 is fixedly installed on the water inlet pipe 11. A second electric valve 122 is fixedly installed on the drain pipe 12. A controller 15 is fixedly installed on the pool body 1, and the controller 15 is electrically connected to the first electric valve 111, the second electric valve 122 and the water pump 121.

[0045] During secondary treatment of wastewater, controller 15 controls the opening of the first electric valve 111 and the closing of the second electric valve 122. Wastewater treated in the previous stage enters the tank 1 through the inlet pipe 11. After a certain period of time, controller 15 controls the closing of the first electric valve 111. At this time, a suitable amount of wastewater remains in the tank 1. The microorganisms in the tank 1 will decompose the organic matter in the wastewater. After a certain period of time, the decomposable organic pollutants in the wastewater are completely decomposed. Controller 15 then controls the opening of the second electric valve 122 and the start of the water pump 121. The secondary treated wastewater in the tank 1 is discharged to the subsequent wastewater treatment station through the drain pipe 12. After a certain period of time, controller 15 controls the closing of the second electric valve 122 and the water pump 121, and the opening of the first electric valve 111, so that wastewater can continue to be transported into the tank 1 for further secondary treatment.

[0046] A mounting bracket 2 is slidably mounted on the top of the pool body 1. The sliding direction of the mounting bracket 2 is the same as the length direction of the pool body 1, and the length direction of the mounting bracket 2 is the same as the width direction of the pool body 1.

[0047] A first drive assembly 5 is provided on the pool body 1. Two sets of the first drive assembly 5 are located on opposite sides of the length of the pool body 1. Each first drive assembly 5 includes a first driving sprocket 51, a first driven sprocket 52, and a first chain 53. The first driving sprocket 51 is rotatably mounted on the side wall of the pool body 1, and its rotation axis is perpendicular to the length of the pool body 1. One first driven sprocket 52 is provided and rotatably connected to the side wall of the pool body 1, and its rotation axis is parallel to the rotation axis of the first driving sprocket 51. The first chain 53 is wound around the first driving sprocket 51 and the first driven sprocket 52, and is meshed with both. The two first chains 53 are fixedly connected to both ends of the mounting frame 2 along its length. A first motor 13 is fixedly mounted on the pool body 1, and the output shaft of the first motor 13 is coaxially fixedly connected to one of the first driving sprockets 51.

[0048] A feeding box 3 is slidably mounted on the top of the mounting frame 2, and the sliding direction of the feeding box 3 is the same as the length direction of the mounting frame 2.

[0049] The mounting frame 2 is equipped with two sets of second drive components 6, located on opposite sides of the mounting frame 2 along its length. Each second drive component 6 includes a second drive sprocket 61, a second driven sprocket, and a second chain 63. The second drive sprocket 61 is rotatably mounted on both sides of the mounting frame 2 along its length, with its axis of rotation perpendicular to the width of the pool body 1. A single second driven sprocket is rotatably connected to the mounting frame 2, and its axis of rotation is parallel to that of the second drive sprocket 61. The second chain 63 is wound around both the second drive sprocket 61 and the second driven sprocket, and is engaged with both. Both second chains 63 are fixedly connected to opposite sides of the feeding box 3. A second motor 14 is fixedly mounted on the mounting frame 2, and the output shaft of the second motor 14 is coaxially fixedly connected to one of the second drive sprockets 61.

[0050] Reference Figure 2 and Figure 3 The feeding box 3 has a top-opening structure, and a feeding pipe 31 is vertically installed at the bottom of the feeding box 3. The feeding pipe 31 is connected to the inside of the feeding box 3, and the connection point is narrowed in the vertical downward direction.

[0051] Reference Figure 3 and Figure 4The feeding box 3 is equipped with an adjustment assembly 4, which includes a fixed plate 41, an adjustment plate 42, and an adjustment motor 43. The fixed plate 41 is coaxially fixed inside the feeding tube 31. Three discharge ports 411 are evenly distributed along the circumference of the fixed plate 41. Three adjustment plates 42 are provided, evenly distributed along the circumference of the feeding tube 31, with each adjustment plate 42 corresponding to one of the discharge ports 411. The adjustment plates 42 are located on top of the fixed plate 41, that is, on the side of the fixed plate 41 closest to the feeding box 3, and the bottom of the adjustment plate 42 abuts against the top of the fixed plate 41. The adjustment motor 43 is fixedly mounted on the feeding box 3, and the output shaft of the adjustment motor 43 is coaxially arranged with the fixed plate 41. The adjustment plate 42 is fixedly connected to the output shaft of the adjustment motor 43.

[0052] The controller 15 is electrically connected to the regulating motor 43, the first motor 13, and the second motor 14.

[0053] During the secondary treatment of wastewater, the operator adds sludge cake rich in microorganisms into the feeding box 3 through the opening at the top. At this time, the regulating plate 42 is located at the opening of the discharge port 411. The regulating plate 42 cooperates with the fixed plate 41 to keep the two ends of the feeding pipe 31 disconnected. Then, the operator controls the regulating motor 43 to start through the controller 15. The regulating motor 43 drives the regulating plate 42 to rotate. During the rotation, the regulating plate 42 moves away from the discharge port 411, keeping the two ends of the feeding pipe 31 connected. During the rotation, the regulating plate 42 crushes the sludge cake in the feeding box 3, causing the sludge cake to fall into the tank 1 through the feeding pipe 31, continuously replenishing the microorganisms in the tank 1, thereby ensuring the treatment efficiency of wastewater.

[0054] When the regulating motor 43 starts, the controller 15 controls the first motor 13 and the second motor 14 to be in working condition. The first motor 13 drives the first drive sprocket 51 to rotate, thereby driving the first chain 53 and the first driven chain to move. When the first chain 53 moves, it drives the mounting frame 2 to slide back and forth along the length of the tank body 1. The second motor 14 drives the second drive sprocket 61 to rotate, thereby driving the second chain 63 and the second driven chain 62 to move. When the second chain 63 moves, it drives the feeding box 3 to slide back and forth along the width of the tank body 1. This allows the sludge cake to fall evenly to various positions in the tank body 1, ensuring that the sludge cake can be fully dissolved in various positions in the tank body 1, thereby improving the treatment efficiency of the sewage in the tank body 1.

[0055] The faster the first motor 13 rotates, the faster the feeding box 3 moves along the length of the pool 1; the faster the second motor 14 rotates, the faster the feeding box 3 moves along the width of the pool 1. The rotation speed of the regulating motor 43 is related to the rate at which the sludge cake falls. By using the controller 15 to control the rotation speeds of the first motor 13, the second motor 14, and the regulating motor 43, the speed at which the feeding box 3 moves along the length and width of the pool 1 is matched to the rate at which the sludge cake falls from the feeding box 3. This ensures efficient replenishment of the sludge cake in the pool 1 without wasting it.

[0056] Reference Figure 1 and Figure 2 An aeration assembly 7 is installed inside the tank body 1. The aeration assembly 7 includes an air supply pipe 71, an aeration head 72, and an air pump 73. The air supply pipe 71 passes through the tank body 1, with the portion of the air supply pipe 71 located at the bottom of the tank body 1 and spreading out along an S-shape throughout the tank body 1. Several aeration heads 72 are evenly distributed on the air supply pipe 71 and are connected to the air supply pipe 71. The aeration heads 72 use existing equipment and will not be described in detail here. The air pump 73 is installed on the air supply pipe 71 and is used to deliver outside air to the aeration heads 72 and discharge it into the tank body 1 through the aeration heads 72.

[0057] During the secondary treatment of wastewater, the air pump 73 is always in operation, delivering outside air to the aeration head 72 and then discharging it into the tank 1 through the aeration head 72, providing sufficient oxygen for the microorganisms in the tank 1, thereby ensuring the efficiency of the microorganisms in decomposing organic pollutants in the wastewater.

[0058] The implementation principle of a biological treatment tank for sewage treatment in this application embodiment is as follows:

[0059] During the secondary treatment of sewage, the sewage treated in the previous station enters the tank 1 through the inlet pipe 11. The microorganisms in the tank 1 decompose the organic matter in the sewage. After a certain period of time, the decomposable organic pollutants in the sewage are completely decomposed. The second electric valve 122 is opened, the water pump 121 is started, and the sewage in the tank 1 is discharged to the subsequent sewage treatment station through the drain pipe 12. Sewage can then continue to be transported into the tank 1 for further secondary treatment.

[0060] During the secondary treatment of wastewater, the operator adds sludge cake to the feed box, and then the controller 15 controls the regulating motor 43 to start. The regulating motor 43 drives the regulating plate 42 to rotate. During the rotation, the regulating plate 42 moves away from the discharge port 411, so that the two ends of the feed pipe 31 are connected. During the rotation, the regulating plate 42 crushes the sludge cake in the feed box 3, so that the sludge cake falls into the tank 1 through the feed pipe 31, continuously replenishing the microorganisms in the tank 1, thereby ensuring the treatment efficiency of wastewater.

[0061] When the regulating motor 43 is started, the first motor 13 and the second motor 14 are in operation. The first motor 13 drives the first drive sprocket 51 to rotate, thereby driving the mounting frame 2 to reciprocate along the length of the tank body 1 via the first chain 53. The second motor 14 drives the second drive sprocket 61 to rotate, thereby driving the feeding box 3 to reciprocate along the width of the tank body 1 via the second chain 63. This ensures that the sludge cake falls evenly to various locations in the tank body 1, guaranteeing that the sludge cake is fully dissolved in all locations within the tank body 1, thereby improving the treatment efficiency of the wastewater in the tank body 1.

[0062] In the secondary treatment of wastewater, outside air is supplied to aeration head 72 and discharged into tank 1 through aeration head 72, providing sufficient oxygen for the microorganisms in tank 1, thereby ensuring the efficiency of microorganisms in decomposing organic pollutants in wastewater.

[0063] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A biological treatment tank for sewage treatment, characterized in that: The system includes a pool body (1), a mounting frame (2), and a feeding box (3). The pool body (1) has a top-open structure and is connected to an inlet pipe (11) and a drain pipe (12). A water pump (121) is installed on the drain pipe (12). The mounting frame (2) is located on the top of the pool body (1). The feeding box (3) is located on the mounting frame (2) and has a top-open structure. A feeding pipe (31) is connected to the bottom of the feeding box (3). An adjustment component (4) is provided on the feeding box (3) to adjust the connection state of the feeding pipe (31). A first drive component (5) and a second drive component (6) are provided on the pool body (1). The first drive component (5) is used to drive the feeding box (3) to move along the length direction of the pool body (1), and the second drive component (6) is used to drive the feeding box (3) to move along the width direction of the pool body (1).

2. The biological treatment tank for sewage treatment according to claim 1, characterized in that: The adjustment assembly (4) includes a fixed plate (41), an adjustment plate (42), and an adjustment motor (43); the fixed plate (41) is coaxially fixed inside the feeding pipe (31); at least one feeding port (411) is provided on the fixed plate (41) along its circumference; at least one adjustment plate (42) is provided, and the adjustment plate (42) corresponds one-to-one with the feeding port (411), and the adjustment plate (42) abuts against the fixed plate (41); the adjustment motor (43) is fixedly installed on the feeding box (3), and the output shaft of the adjustment motor (43) is coaxially arranged with the fixed plate (41), and the adjustment plate (42) is fixedly connected to the output shaft of the adjustment motor (43).

3. The biological treatment tank for sewage treatment according to claim 2, characterized in that: Two sets of the first drive assembly (5) are provided and are located on both sides of the length direction of the pool body (1); the first drive assembly (5) includes a first drive sprocket (51), a first driven sprocket (52) and a first chain (53); the first drive sprocket (51) is rotatably mounted on the pool body (1); at least one first driven sprocket (52) is provided and is rotatably connected to the pool body (1); the first chain (53) is wound around the first drive sprocket (51) and the first driven sprocket (52), and the first chain (53) is engaged with both the first drive sprocket (51) and the first driven sprocket (52); the mounting bracket (2) is slidably mounted on the pool body (1), and the two ends of the mounting bracket (2) are fixedly connected to the two first chains (53) respectively; a first motor (13) is fixedly mounted on the pool body (1), and the first motor (13) is used to drive the first drive sprocket (51) to rotate.

4. The biological treatment tank for sewage treatment according to claim 3, characterized in that: The length direction of the mounting frame (2) is the same as the width direction of the pool body (1); two sets of the second drive assembly (6) are provided, and are respectively located on both sides of the length direction of the mounting frame (2); the second drive assembly (6) includes a second drive sprocket (61), a second driven sprocket and a second chain (63); the second drive sprocket (61) is rotatably mounted on the mounting frame (2); at least one second driven sprocket is provided and is rotatably connected to the mounting frame (2); the second chain (63) is wound around the second drive sprocket (61) and the second driven sprocket, and the second chain (63) is engaged with both the second drive sprocket (61) and the second driven sprocket; the feeding box (3) is slidably mounted on the mounting frame (2), and the feeding box (3) is fixedly connected to both second chains (63); a second motor (14) is fixedly mounted on the mounting frame (2), and the second motor (14) is used to drive the second drive sprocket (61) to rotate.

5. The biological treatment tank for sewage treatment according to claim 4, characterized in that: A controller (15) is fixedly installed on the pool body (1), and the controller (15) is electrically connected to the regulating motor (43), the first motor (13) and the second motor (14).

6. The biological treatment tank for sewage treatment according to claim 5, characterized in that: A first electric valve (111) is installed on the water inlet pipe (11); a second electric valve (122) is installed on the drain pipe (12); the first electric valve (111), the second electric valve (122) and the water pump (121) are all electrically connected to the controller (15).

7. The biological treatment tank for sewage treatment according to claim 1, characterized in that: An aeration assembly (7) is provided on the pool body (1). The aeration assembly (7) includes an air supply pipe (71), an aeration head (72), and an air pump (73). The air supply pipe (71) passes through the pool body (1), and the part of the air supply pipe (71) inside the pool body (1) is located at the bottom of the pool body (1). Several aeration heads (72) are provided on the air supply pipe (71), and the aeration heads (72) are connected to the air supply pipe (71). The air pump (73) is installed on the air supply pipe (71) and is used to deliver outside air to the aeration head (72) and discharge it into the pool body (1) through the aeration head (72).

8. The biological treatment tank for sewage treatment according to claim 7, characterized in that: The portion of the air supply pipe (71) inside the pool body (1) is laid out in an S-shape to cover the pool body (1); the aeration heads (72) are evenly arranged on the air supply pipe (71).

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