Microbial sewage treatment system

Abstract

The utility model discloses a microbial sewage treatment system, which relates to the technical field of sewage treatment and comprises a sedimentation tank, a first filter device, an aeration tank, a transfer tank and a second filter device, a garbage collection tank is arranged at the left end of the sedimentation tank, and a water inlet pipe is arranged above the sedimentation tank; the first filtering device is arranged between the sedimentation tank and the garbage collection tank, and is used for filtering garbage entering the sedimentation tank from the water inlet pipe and conveying the filtered garbage into the garbage collection tank; the aeration tank is connected with the sedimentation tank through a pipeline, and a biological filler is arranged in the aeration tank; the transfer tank is arranged at the right end of the aeration tank and is connected with the aeration tank through an overflow port; the second filtering device is arranged between the aeration tank and the transfer tank, and is used for filtering the biological filler entering the transfer tank from the overflow port and conveying the filtered biological filler back into the aeration tank. According to the utility model, the labor intensity of workers can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a microbial sewage treatment system. Background Art

[0002] In the sewage treatment industry, microbial biochemical technology is a common and important water treatment technology. The number of microbial species, the size of biomass, the activity of microorganisms and other characteristics determine the treatment load and treatment effect of microbial biochemical technology. In microbial biochemical technology, the biological fluidized bed process has many microbial species, large biomass, and active microorganisms. It has a high treatment load and good treatment effect; therefore, the biological fluidized bed process is gradually becoming the mainstream process of microbial biochemical technology. In the sewage treatment system, it is often necessary to use biological fillers to decompose pollutants in sewage. After the biofilm is formed, due to some reasons, such as insufficient nutrients in the raw water, the microorganisms will die due to metabolism and deposit on the surface of the filler carrier. The sediments sometimes clog the interception screen, affecting the water output efficiency, and need to be cleaned manually frequently. In addition, before the sewage enters the microbial treatment, it is also necessary to filter the large volume of solid garbage in the sewage. This part also often needs to be cleaned manually, resulting in a high labor intensity for the operators. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a microbial sewage treatment system, which can reduce the labor intensity of the staff.

[0004] A microbial sewage treatment system according to an embodiment of the first aspect of the utility model comprises: a sedimentation tank, a first filtering device, an aeration tank, a transfer tank, and a second filtering device, wherein a garbage collection tank is provided at the left end of the sedimentation tank, and a water inlet pipe is provided above the sedimentation tank; the first filtering device is provided between the sedimentation tank and the garbage collection tank, and the first filtering device is used to filter garbage entering the sedimentation tank from the water inlet pipe and transport the filtered garbage to the garbage collection tank; the aeration tank is connected to the sedimentation tank through a pipeline, and biological fillers are provided in the aeration tank; the transfer tank is provided at the right end of the aeration tank, and the transfer tank is connected to the aeration tank through an overflow port; the second filtering device is provided between the aeration tank and the transfer tank, and the second filtering device is used to filter the biological fillers entering the transfer tank from the overflow port and transport the filtered biological fillers back to the aeration tank.

[0005] According to the embodiment of the utility model, a microbial sewage treatment system has at least the following beneficial effects: the first filter device can not only intercept garbage, but also transport the intercepted garbage to the garbage collection pool. The second filter device can not only intercept biological fillers, but also transport the intercepted biological fillers to the aeration tank, which effectively reduces the labor intensity of the staff.

[0006] According to some embodiments of the utility model, the first filter device has a first position and a second position. When the first filter device is in the first position, the first filter device is located in the sedimentation tank and below the water inlet pipe, and the water inlet pipe can transport sewage to the first filter device for filtration. When the first filter device is in the second position, the first filter device is at least partially moved to above the garbage collection tank and garbage in the first filter device can fall into the garbage collection tank under the action of gravity. The sedimentation tank is connected to a first drive device, and the first drive device is used to drive the first filter device to switch between the first position and the second position.

[0007] According to some embodiments of the utility model, the second filter device has a third position and a fourth position. When the second filter device is in the third position, the second filter device is located in the transfer tank and matches the overflow port position, and the overflow port can transport sewage to the second filter device for filtration. When the second filter device is in the fourth position, the second filter device is at least partially moved above the aeration tank and the biological filler in the second filter device can fall into the garbage collection tank under the action of gravity. The transfer tank is connected to a second drive device, and the second drive device is used to drive the second filter device to switch between the third position and the fourth position.

[0008] According to some embodiments of the utility model, the first filter device includes a first filter box and a first rotating shaft, one end of the first filter box is open, and a plurality of first water filter holes are evenly distributed on the side wall of the first filter box, the first rotating shaft is fixedly connected to the left side of the upper end of the first filter box, and the first rotating shaft is rotatably installed on the upper end of the garbage collection pool, the first driving device is transmission-connected to the first rotating shaft, and the first rotating shaft can drive the first filter box to rotate when driven by the first driving device, when the first filter device is in the first position, the opening of the first filter box is vertically facing upward, and the first filter box is located below the water inlet pipe, and when the first filter device is in the second position, the opening of the first filter box is tilted toward the garbage collection pool to pour the garbage in the first filter box into the garbage collection pool.

[0009] According to some embodiments of the utility model, the second filter device includes a second filter box and a second rotating shaft, the second filter box is open at one end, and a plurality of second water filtering holes are evenly distributed on the side wall of the second filter box, the second rotating shaft is fixedly connected to the left side of the upper end of the second filter box, and the second rotating shaft is rotatably installed on the right side of the upper end of the aeration tank, the second driving device is transmission-connected to the second rotating shaft, and the second rotating shaft can drive the second filter box to rotate when driven by the second driving device, when the second filter device is in the third position, the opening of the second filter box is vertically facing upward, and the second filter box is aligned with the overflow port, and when the second filter device is in the fourth position, the opening of the second filter box is tilted toward the aeration tank to pour the biological filler in the second filter box into the aeration tank.

[0010] According to some embodiments of the utility model, the first driving device includes a first motor and a first transmission bracket, the first motor is connected to the side wall of the sedimentation tank, a first driving gear is arranged on the output shaft of the first motor, the first transmission bracket is connected to one end of the first rotating shaft, and a first arc-shaped rack meshing with the first driving gear is arranged on the first transmission bracket.

[0011] According to some embodiments of the utility model, the second driving device includes a second motor and a second transmission bracket, the second motor is connected to the side wall of the transfer pool, a second driving gear is arranged on the output shaft of the second motor, the second transmission bracket is connected to one end of the second rotating shaft, and a second arc-shaped rack meshing with the second driving gear is arranged on the second transmission bracket.

[0012] According to some embodiments of the utility model, an aeration pipe for ventilating the aeration tank is provided at the bottom of the aeration tank.

[0013] According to some embodiments of the utility model, a partition is provided in the sedimentation tank, the height of the partition is lower than the height of the sedimentation tank, a water pump is provided in the sedimentation tank, the water pump is connected to the pipeline, and the first filtering device and the water pump are respectively located on both sides of the partition.

[0014] According to some embodiments of the utility model, the garbage collection pool is funnel-shaped, and a discharge valve is provided at the lower end of the garbage collection pool.

[0015] A microbial sewage treatment system according to an embodiment of the utility model has at least the following beneficial effects:

[0016] (1) The first filter device and the second filter device filter garbage and biological fillers respectively, automatically transport the intercepted garbage to the garbage collection pool, and automatically transport the intercepted biological fillers to the aeration pool, effectively reducing the labor intensity of the staff;

[0017] (2) The first filter box and the second filter box have simple structures and are not prone to clogging;

[0018] (3) Using sedimentation tanks to separate small solid particles in sewage is beneficial to improving the efficiency of subsequent microbial water purification.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 A schematic diagram of an embodiment of the utility model in which the first filter device is located at a first position and the second filter device is located at a third position;

[0022] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0023] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0024] Figure 4 A schematic diagram of an embodiment of the utility model in which the first filter device is located at the second position and the second filter device is located at the fourth position;

[0025] Figure 5 A top view of an embodiment of the utility model;

[0026] Figure 6 It is a front view of an embodiment of the utility model.

[0027] Figure Number:

[0028] Sedimentation tank 100, water inlet pipe 110, baffle 120, water pump 130;

[0029] Garbage collection tank 200, discharge valve 210;

[0030] A first filter device 300, a first filter box 310, a first water filter hole 311, and a first rotating shaft 320;

[0031] Aeration tank 400, pipeline 410, aeration pipe 420;

[0032] Transfer tank 500, overflow port 510;

[0033] A second filter device 600, a second filter box 610, a second water filter hole 611, and a second rotating shaft 620;

[0034] A first driving device 700, a first motor 710, a first driving gear 711, a first transmission bracket 720, and a first arc-shaped rack 721;

[0035] The second driving device 800 , the second motor 810 , the second driving gear 811 , the second transmission bracket 820 , and the second arc-shaped rack 821 . DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Reference Figures 1 to 6As shown, a microbial sewage treatment system according to an embodiment of the utility model comprises: a sedimentation tank 100, a first filtering device 300, an aeration tank 400, a transfer tank 500, and a second filtering device 600. The sedimentation tank 100 is constructed by concrete masonry or welded by steel and steel plates. A garbage collection tank 200 is arranged at the left end of the sedimentation tank 100, and the garbage collection tank 200 serves to temporarily store garbage and debris. An inlet pipe 110 is arranged above the sedimentation tank 100. The inlet pipe 110 is connected to a sewage collecting device to guide the sewage into the sedimentation tank 100. The first filtering device 300 is arranged between the sedimentation tank 100 and the garbage collection tank 200. Since there may be a large volume of solid garbage in the untreated sewage, the solid garbage needs to be separated from the sewage to avoid affecting the subsequent treatment. However, the usual equipment with filtering function needs to be treated frequently to avoid blockage caused by excessive accumulation of garbage, and the labor intensity of manual cleaning by the staff is relatively high. The first filter device 300 is used to filter the garbage entering the sedimentation tank 100 from the water inlet pipe 110 and transport the filtered garbage to the garbage collection tank 200; the first filter device 300 can not only intercept the garbage, but also transport the intercepted garbage to the garbage collection tank 200. The labor intensity of the staff is effectively reduced. The aeration tank 400 is connected to the sedimentation tank 100 through a pipe 410. The sewage is transported to the aeration tank 400 after separating small-volume solid particles in the sedimentation tank 100. Aerobic microorganisms are placed in the aeration tank 400. Biological fillers are also placed in the aeration tank 400. The biological fillers are three-dimensional hollow fillers made of polypropylene or polyethylene. The biological fillers provide a carrier for aerobic microorganisms to attach. The microbial film grown on the surface of the biological filler is in a highly active logarithmic growth period due to the fluidization collision of the filler and the aeration scouring, and the treatment efficiency is high. It can improve the efficiency of aerobic microbial growth and reproduction. Anaerobic bacteria grow inside the biological filler, which can remove nitrogen by denitrification; aerobic bacteria grow outside the biological filler to remove organic matter. Nitrification and denitrification processes exist simultaneously in the entire treatment process. The transfer tank 500 is set at the right end of the aeration tank 400, and the transfer tank 500 is connected to the aeration tank 400 through the overflow port 510; when the water level of the aeration tank 400 rises to a height higher than the overflow port 510, the sewage in the aeration tank 400 will flow from the overflow port 510 to the transfer tank 500. During operation, the biological filler is suspended in the water, and some of the biological filler will flow into the transfer tank 500 with the water flow. The second filter device 600 is set between the aeration tank 400 and the transfer tank 500. The biological filler needs to be in the aeration tank 400 to play a better role in purifying water quality. The second filter device 600 is used to filter the biological filler entering the transfer tank 500 from the overflow port 510 and transport the filtered biological filler back to the aeration tank 400. The second filtering device 600 can not only intercept the biological fillers, but also transport the intercepted biological fillers to the aeration tank 400, which effectively reduces the labor intensity of the staff.

[0041] Reference Figures 1 to 4 As shown, it can be understood that the first filter device 300 has a first position and a second position. When the first filter device 300 is in the first position, the first filter device 300 is located in the sedimentation tank 100 and below the water inlet pipe 110. The water inlet pipe 110 can transport sewage to the first filter device 300 for filtration. The height of the water inlet pipe 110 is greater than the first filter device 300. During the falling process of sewage, the sewage passes through the first filter device 300 under the action of gravity, and the large pieces of solid garbage in the sewage are intercepted by the first filter device 300. When the first filter device 300 is in the second position, the first filter device 300 is at least partially flipped and moved above the garbage collection tank 200, and the garbage in the first filter device 300 can fall into the garbage collection tank 200 under the action of gravity. The outer wall of the sedimentation tank 100 is connected with a first drive device 700, and the first drive device 700 is used to drive the first filter device 300 to switch between the first position and the second position. Using the first drive device 700 to drive the first filter device 300 can effectively reduce the labor intensity of the staff. During normal operation, the first filter device 300 is kept at the first position to filter sewage. At regular intervals, the first drive device 700 drives the first filter device 300 to move to the second position to pour the filtered garbage into the garbage collection pool 200.

[0042] Reference Figures 1 to 4 As shown, it can be understood that the second filter device 600 has a third position and a fourth position. When the second filter device 600 is located at the third position, the second filter device 600 is located in the transfer tank 500 and matches the overflow port 510 position. The second filter device 600 located at the third position can receive sewage flowing out of the overflow port 510. The overflow port 510 can transport sewage to the second filter device 600 for filtration. When the second filter device 600 is located at the fourth position, the second filter device 600 at least partially moves above the aeration tank 400 and the biological filler in the second filter device 600 can fall into the garbage collection tank 200 under the action of gravity. The transfer tank 500 is connected to a second drive device 800, and the second drive device 800 is used to drive the second filter device 600 to switch between the third position and the fourth position. The second drive device 800 is used to drive the second filter device 600 to switch between the third position and the fourth position. Using the second drive device 800 to drive the second filter device 600 can effectively reduce the labor intensity of the staff. During normal operation, the second filter device 600 is kept at the third position to filter sewage. At regular intervals, the second drive device 800 drives the second filter device 600 to move to the fourth position to pour the filtered biological filler into the aeration tank 400.

[0043] Reference Figures 1 to 6As shown, it can be understood that the first filter device 300 includes a first filter box 310 and a first rotating shaft 320, one end of the first filter box 310 is open, and the material of the first filter box 310 is stainless steel. The side wall and the bottom wall of the first filter box 310 are evenly distributed with a plurality of first water filter holes 311, and the diameter of the first water filter holes 311 is between 1 cm and 2 cm. The first rotating shaft 320 is welded to the left side of the upper end of the first filter box 310 located at the first position, and the first rotating shaft 320 is rotatably installed on the right side of the upper end of the garbage collection pool 200. The first mounting seat for the first rotating shaft 320 to pass through is provided on the right side of the upper end of the garbage collection pool 200, and the first mounting seat plays a supporting role for the first rotating shaft 320. The first driving device 700 is connected to the first rotating shaft 320 in a transmission manner, and the first driving device 700 can drive the first rotating shaft 320 to rotate. The garbage collection pool 200 and the sedimentation tank 100 are respectively located on the left and right sides of the rotating axis of the first rotating shaft 320. When the first rotating shaft 320 is driven by the first driving device 700, the first filter box 310 can be driven to rotate. When the first filter device 300 is located in the first position, the opening of the first filter box 310 is vertically upward to receive the sewage discharged from the water inlet pipe 110, and the first filter box 310 is located below the water inlet pipe 110, playing the role of filtering large pieces of solid garbage in the sewage. When the first filter device 300 is located in the second position, the opening of the first filter box 310 is tilted toward the garbage collection pool 200 to use gravity to pour the garbage in the first filter box 310 into the garbage collection pool 200.

[0044] Reference Figures 1 to 6 As shown, it can be understood that the second filter device 600 includes a second filter box 610 and a second rotating shaft 620, one end of the second filter box 610 is open, and the material of the second filter box 610 is stainless steel. The side wall and the bottom wall of the second filter box 610 are evenly distributed with a plurality of second water filter holes 611, and the diameter of the second water filter holes 611 is between 1 cm and 2 cm. The second rotating shaft 620 is welded to the left side of the upper end of the second filter box 610 located at the third position, and the second rotating shaft 620 is rotatably installed on the right side of the upper end of the aeration tank 400. The right side of the upper end of the aeration tank 400 is provided with a second mounting seat for the second rotating shaft 620 to pass through. The second driving device 800 is connected to the second rotating shaft 620 in a transmission manner, and the aeration tank 400 and the transfer tank 500 are respectively located on the left and right sides of the rotating axis of the second rotating shaft 620. When the second rotating shaft 620 is driven by the second driving device 800, the second filter box 610 can be driven to rotate. When the second filter device 600 is located at the third position, the opening of the second filter box 610 is vertically upward, and the second filter box 610 is aligned with the overflow port 510 to receive the sewage discharged from the overflow port 510, and the second filter box 610 intercepts the biological filler in the sewage. When the second filter device 600 is located at the fourth position, the opening of the second filter box 610 is tilted toward the aeration tank 400 to use gravity to pour the biological filler in the second filter box 610 into the aeration tank 400.

[0045] Reference Figures 1 to 4 As shown, it can be understood that the first driving device 700 includes a first motor 710 and a first transmission bracket 720. The first motor 710 is connected to the side wall of the sedimentation tank 100. The first motor 710 uses a servo motor to accurately control the rotation angle. A first driving gear 711 is arranged on the output shaft of the first motor 710. It can be foreseen that the output shaft of the first motor 710 can be connected to the first driving gear 711 through a reducer to increase the rotation torque of the first driving gear 711. The first transmission bracket 720 is welded at one end of the first rotating shaft 320. The first transmission bracket 720 is provided with a first arc-shaped rack 721 meshing with the first driving gear 711. The center of the first arc-shaped rack 721 coincides with the first rotating shaft 320. When the first driving gear 711 rotates, it drives the first arc-shaped rack 721 to rotate around the first rotating shaft 320, thereby driving the first rotating shaft 320 to rotate through the first transmission bracket 720. It can be foreseen that when the first motor 710 is powered off, the first filter device 300 should be able to rotate to the first position under the action of gravity.

[0046] Reference Figures 1 to 4 As shown, it can be understood that the second driving device 800 includes a second motor 810 and a second transmission bracket 820. The second motor 810 is connected to the side wall of the transfer pool 500. The second motor 810 uses a servo motor to accurately control the rotation angle. A second driving gear 811 is provided on the output shaft of the second motor 810. It can be foreseen that the output shaft of the second motor 810 can be connected to the second driving gear 811 through a reducer to increase the rotation torque of the second driving gear 811. The second transmission bracket 820 is welded at one end of the second rotating shaft 620. The second transmission bracket 820 is provided with a second arc-shaped rack 821 meshing with the second driving gear 811. The center of the second arc-shaped rack 821 coincides with the second rotating shaft 620. When the second driving gear 811 rotates, it drives the second arc-shaped rack 821 to rotate around the second rotating shaft 620, thereby driving the second rotating shaft 620 to rotate through the second transmission bracket 820. It can be foreseen that when the second motor 810 is powered off, the second filter device 600 should be able to rotate to the third position under the action of gravity.

[0047] Reference Figures 1 to 6 As shown, it can be understood that an aeration pipe 420 for ventilating the aeration tank 400 is provided at the bottom of the aeration tank 400. The aeration pipe 420 is connected to an air compressor and other equipment to introduce air into the aeration tank 400. The side wall of the aeration pipe 420 is evenly provided with a plurality of air holes for air circulation. Aerobic microorganisms can perform aerobic respiration under aerobic conditions, converting organic pollutants into carbon dioxide and water while releasing energy for their own growth and reproduction. By adding air, the oxygen content of the sewage in the aeration tank 400 can be increased, and the growth and reproduction of aerobic microorganisms can be promoted.

[0048] Reference Figures 1 to 6 As shown, it can be understood that a partition 120 is provided in the sedimentation tank 100, and the height of the partition 120 is lower than the height of the sedimentation tank 100. The partition 120 divides the sedimentation tank 100 into a first space and a second space. The small volume of solid particles in the sewage in the first space settles under the action of gravity, and the relatively clean sewage overflows from the top of the partition 120 to the second space. A water pump 130 is provided in the sedimentation tank 100, and the water pump 130 is connected to the pipeline 410. The first filter device 300 and the water pump 130 are respectively located on both sides of the partition 120. The first filter device 300 is located in the first space. The water pump 130 is located in the second space.

[0049] Reference Figures 1 to 6 As shown, it can be understood that the garbage collection pool 200 is funnel-shaped, and a discharge valve 210 is provided at the lower end of the garbage collection pool 200. The discharge valve 210 can be a manual gate valve, and the garbage in the garbage collection pool 200 can be discharged from the discharge valve 210 after the discharge valve 210 is opened.

[0050] Working principle: sewage flows down from the water inlet pipe 110 and enters the first filter device 300 located at the first position. The first filter box 310 intercepts the garbage in the sewage and retains it in the first filter box 310. The separated sewage enters the sedimentation tank 100. The sewage overflows into the second space after the solid particles are settled in the sedimentation tank 100. The water pump 130 draws the sewage in the second space into the aeration tank 400. The aeration pipe 420 introduces air into the aeration tank 400. The aerobic microorganisms attached to the biological filler can perform aerobic respiration under aerobic conditions, converting organic pollutants into carbon dioxide and water while releasing energy for their own growth and reproduction. The purified sewage passes through the second filter device 600 located at the third position from the overflow port 510. The second filter box 610 intercepts the biological filler in the sewage. The sewage enters the transfer tank 500 and is then discharged. The first motor 710 is started regularly to drive the first filter box 310 to rotate and dump the garbage in the first filter box 310 into the garbage collection tank 200. The second motor 810 is started regularly to drive the second filter box 610 to rotate and dump the garbage in the second filter box 610 into the aeration tank 400.

[0051] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A microbial sewage treatment system, characterized in that: include: A sedimentation tank (100), wherein a garbage collection tank (200) is disposed at the left end of the sedimentation tank (100), and a water inlet pipe (110) is disposed above the sedimentation tank (100); A first filtering device (300) is disposed between the sedimentation tank (100) and the garbage collection tank (200), the first filtering device (300) being used to filter garbage entering the sedimentation tank (100) from the water inlet pipe (110) and transport the filtered garbage to the garbage collection tank (200); an aeration tank (400), connected to the sedimentation tank (100) via a pipeline (410), wherein biological fillers are provided in the aeration tank (400); A transfer tank (500) is arranged at the right end of the aeration tank (400), and the transfer tank (500) is connected to the aeration tank (400) through an overflow port (510); The second filtering device (600) is arranged between the aeration tank (400) and the transfer tank (500), and the second filtering device (600) is used to filter the biological filler entering the transfer tank (500) from the overflow port (510) and transport the filtered biological filler back to the aeration tank (400).

2. The microbial sewage treatment system according to claim 1, characterized in that: The first filter device (300) has a first position and a second position. When the first filter device (300) is located at the first position, the first filter device (300) is located in the sedimentation tank (100) and below the water inlet pipe (110), and the water inlet pipe (110) can transport sewage to the first filter device (300) for filtration. When the first filter device (300) is located at the second position, the first filter device (300) at least partially moves above the garbage collection tank (200) and garbage in the first filter device (300) can fall into the garbage collection tank (200) under the action of gravity. The sedimentation tank (100) is connected to a first drive device (700), and the first drive device (700) is used to drive the first filter device (300) to switch between the first position and the second position.

3. The microbial sewage treatment system according to claim 2, characterized in that: The second filter device (600) has a third position and a fourth position. When the second filter device (600) is located at the third position, the second filter device (600) is located in the transfer tank (500) and matches the position of the overflow port (510). The overflow port (510) can transport sewage to the second filter device (600) for filtration. When the second filter device (600) is located at the fourth position, the second filter device (600) at least partially moves above the aeration tank (400) and the biological filler in the second filter device (600) can fall into the garbage collection tank (200) under the action of gravity. The transfer tank (500) is connected to a second drive device (800). The second drive device (800) is used to drive the second filter device (600) to switch between the third position and the fourth position.

4. The microbial sewage treatment system according to claim 3, characterized in that: The first filter device (300) comprises a first filter box (310) and a first rotating shaft (320); one end of the first filter box (310) is open; a plurality of first water filtering holes (311) are evenly distributed on the side wall of the first filter box (310); the first rotating shaft (320) is fixedly connected to the left side of the upper end of the first filter box (310); the first rotating shaft (320) is rotatably mounted on the upper end of the garbage collection pool (200); the first driving device (700) is transmission-connected to the first rotating shaft (320); the first rotating shaft (320) ) can drive the first filter box (310) to rotate when driven by the first driving device (700); when the first filter device (300) is located in the first position, the opening of the first filter box (310) is vertically upward, and the first filter box (310) is located below the water inlet pipe (110); when the first filter device (300) is located in the second position, the opening of the first filter box (310) is inclined toward the garbage collection pool (200) so as to pour the garbage in the first filter box (310) into the garbage collection pool (200).

5. The microbial sewage treatment system according to claim 4, characterized in that: The second filtering device (600) comprises a second filtering box (610) and a second rotating shaft (620); one end of the second filtering box (610) is open; a plurality of second water filtering holes (611) are evenly distributed on the side wall of the second filtering box (610); the second rotating shaft (620) is fixedly connected to the left upper end of the second filtering box (610); the second rotating shaft (620) is rotatably mounted on the right upper end of the aeration tank (400); the second driving device (800) is transmission-connected to the second rotating shaft (620); the second rotating shaft (620) is ) can drive the second filter box (610) to rotate when driven by the second driving device (800); when the second filter device (600) is located in the third position, the opening of the second filter box (610) is vertically upward, and the second filter box (610) is aligned with the overflow port (510); when the second filter device (600) is located in the fourth position, the opening of the second filter box (610) is tilted toward the aeration tank (400) so as to pour the biological filler in the second filter box (610) into the aeration tank (400).

6. The microbial sewage treatment system according to claim 5, characterized in that: The first driving device (700) comprises a first motor (710) and a first transmission bracket (720); the first motor (710) is connected to the side wall of the sedimentation tank (100); a first driving gear (711) is arranged on the output shaft of the first motor (710); the first transmission bracket (720) is connected to one end of the first rotating shaft (320); and a first arc-shaped rack (721) meshing with the first driving gear (711) is arranged on the first transmission bracket (720).

7. The microbial sewage treatment system according to claim 6, characterized in that: The second driving device (800) comprises a second motor (810) and a second transmission bracket (820); the second motor (810) is connected to the side wall of the transfer pool (500); a second driving gear (811) is arranged on the output shaft of the second motor (810); the second transmission bracket (820) is connected to one end of the second rotating shaft (620); and a second arc-shaped rack (821) meshing with the second driving gear (811) is arranged on the second transmission bracket (820).

8. The microbial sewage treatment system according to claim 1, characterized in that: An aeration pipe (420) for ventilating the aeration tank (400) is provided at the bottom of the aeration tank (400).

9. The microbial wastewater treatment system according to claim 1, characterized in that: The sedimentation tank (100) is provided with a partition (120), the height of the partition (120) is lower than the height of the sedimentation tank (100), the sedimentation tank (100) is provided with a water pump (130), the water pump (130) is connected to the pipeline (410), and the first filtering device (300) and the water pump (130) are respectively located on both sides of the partition (120).

10. The microbial wastewater treatment system according to claim 1, characterized in that: The garbage collection pool (200) is funnel-shaped, and a discharge valve (210) is provided at the lower end of the garbage collection pool (200).

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