Microbial sewage treatment device with self-oxygenation function

Abstract

The invention discloses a microbial sewage treatment device with a self-oxygenation function. The microbial sewage treatment device comprises a sewage reservoir, a first microbial treatment sewage reservoir and a plurality of small second microbial treatment sewage reservoirs, the internal volume of the sewage reservoir is larger than that of the first microbiological treatment sewage reservoir, the sewage reservoir is arranged beside the first microbiological treatment sewage reservoir, and a plurality of second microbiological treatment sewage reservoirs are distributed beside the first microbiological treatment sewage reservoir in a row; a row of first sewage discharge water pipes are arranged on the side wall of the sewage reservoir and close to the bottom, a falling liquid blast structure is erected at the bottom end of each first sewage discharge water pipe, and sewage discharged by the first sewage discharge water pipes enters the falling liquid blast structures; the liquid falling air blowing structure comprises a waterwheel and an air blowing cylinder. According to the invention, the sewage has great gravitational potential energy after being conveyed to a sewage plant, the gravitational potential energy is used for generating drive to form air flow to supplement oxygen to the second microbiological treatment sewage reservoir, and the potential energy is fully used for oxygen aeration.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment devices, and in particular to a microbial sewage treatment device with a self-oxygenation function. Background Art

[0002] With the deepening of environmental awareness and the urging and supervision of relevant departments, urban sewage must now be treated by a sewage treatment system to meet standards before it can be discharged. The current common sewage treatment method is to use a microbial sewage treatment pool to treat sewage. The microbial sewage treatment pool can oxidize and decompose organic harmful substances in sewage into inorganic harmless substances through the microorganisms in the pool water, and has a very good sewage treatment effect.

[0003] The difficulty in implementing a microbial sewage treatment pool is that it is necessary to provide a suitable living environment for microorganisms. One of them is that it is necessary to ensure that there is enough dissolved oxygen in the pool water, otherwise the microorganisms in the treatment will die in large numbers, causing the treatment pool to lose the sewage treatment effect. The water temperature in the sewage pool is quite different in hot summer and cold winter, and the dissolved oxygen content will be different. Since the high temperature in summer is suitable for the growth of microorganisms, but the oxygen content is lower than that in winter, the oxygen content in the sewage pool in summer is less suitable for aerobic microorganisms to metabolize and decompose harmful organic substances. Therefore, it is more necessary to increase the oxygenation of the pool in summer. Due to the large amount of sewage in the sewage treatment plant, the use of electricity to achieve oxygenation consumes a lot of electricity, which greatly increases the cost of sewage treatment. Since the sewage flows from higher areas, after the sewage flows over and is pumped to a certain height, it will increase the huge energy consumption brought by pumping into the high treatment area. Therefore, the sewage treatment plant will generally be located in a depression to reduce the cost of sewage treatment. Since the sewage flow has a large gravitational potential energy, this part is well utilized, which can not only save energy, but also better increase the dissolved oxygen content. However, many of the Alumni sewage treatment plants do not have the ability to utilize the gravitational potential energy of this sewage. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the present invention is to provide a microbial sewage treatment device with a self-oxygenation function, which solves the problem of insufficient dissolved oxygen when a sewage plant performs microbial aerobic decomposition of organic harmful substances in sewage.

[0005] A microbial sewage treatment device with a self-oxygenation function according to the present invention comprises a sewage storage tank, a first microbial sewage treatment storage tank and a plurality of small second microbial sewage treatment storage tanks; The volume of the sewage storage tank is larger than the volume of the first microbial treatment sewage storage tank. The sewage storage tank is arranged beside the first microbial treatment sewage storage tank, and the bottom of the sewage storage tank is 5-10m higher than the top of the first microbial treatment sewage storage tank. A plurality of second microbial treatment sewage storage tanks are arranged in a row beside the first microbial treatment sewage storage tank, and the bottom of the first microbial treatment sewage storage tank is 1.0-1.5m higher than the top of the second microbial treatment sewage storage tank. A row of first row sewage pipes is arranged near the bottom of the side wall of the sewage storage tank facing the first microbial treatment sewage storage tank, and each first row sewage pipe is arranged near the bottom of the side wall of the sewage storage tank facing the first microbial treatment sewage storage tank. The bottom ends of the first sewage pipes are all located above the pool mouth of the first microbial sewage treatment water storage tank, and a liquid-falling air blowing structure is set up at the bottom end of each of the first sewage pipes. The sewage discharged from the first sewage pipes enters the liquid-falling air blowing structure and the air flow generated is discharged into the oxygenation pipe set in the corresponding second microbial sewage treatment water storage tank through the air flow pipe. A row of second sewage pipes is set near the bottom end of a side wall of the first microbial sewage treatment water storage tank facing the plurality of second microbial sewage treatment water storage tanks, and the bottom end of the row of the second sewage pipes extends to the pool mouth position of the corresponding second microbial sewage treatment water storage tank; The liquid falling blowing structure includes a waterwheel and a blower, the rotating shaft of the waterwheel is installed on the bracket and one end of the rotating shaft extends to the outside of the bracket and is provided with a driving gear plate at the end, the driving shaft of the blower extends outside the cylinder and is provided with a driven gear plate at the end of the driving shaft, the driving gear plate is meshed with the driven gear plate, the blower is also installed on the bracket, and the air outlet of the blower is discharged into the oxygen enrichment pipeline through the air flow pipe.

[0006] In some embodiments of the present invention, a first solenoid valve is provided in each of the first-row sewage pipes in a row, and the first solenoid valves in each of the first-row sewage pipes in a row are numbered in sequence, a second solenoid valve is provided in each of the second-row sewage pipes in a row, and the second solenoid valves in each of the second-row sewage pipes in a row are numbered in sequence; The first solenoid valves in the first row of sewage pipes in a row correspond to each other in a numbered order and the second solenoid valves in the second row of sewage pipes in a row correspond to each other in a numbered order.

[0007] In some other embodiments of the present invention, the first solenoid valve is a flow control solenoid valve, and the sewage discharge speed at which the first solenoid valve is started is positively correlated with the ambient temperature.

[0008] In some other embodiments of the present invention, the first sewage pipe is a bent pipe, which includes a horizontal pipe and a downwardly bent inclined pipe, and the angle between the inclined pipe and the horizontal plane is between 60-75°.

[0009] In other embodiments of the present invention, a splashing platform is provided in the second microbial sewage treatment reservoir at the bottom end of the second sewage pipe. The splashing platform is installed in the second microbial sewage treatment reservoir through a support rod and the splashing platform is higher than the sewage surface in the second microbial sewage treatment reservoir.

[0010] In other embodiments of the present invention, the blower includes a wind tube, an air collecting duct and a vortex blade propeller, one end of the wind tube is closed and the other end is connected to the air collecting duct, the wind tube passes through a drive shaft from the closed end and is provided with bearings at both ends of the wind tube, and two bearings are fixedly installed in the wind tube with a cross, and four air inlet holes are provided on a circle of the side wall of the wind tube close to the closed end.

[0011] In other embodiments of the present invention, the oxygenation pipeline includes a plurality of square tubes which gradually become smaller from the outside to the inside and the square tubes are nested one by one from the outside to the inside. The nested square tubes are connected to each other by pipes. The end of the airflow tube is arranged at the center of the oxygenation pipeline and the end of the airflow tube is connected to the innermost circle of square tubes through a plurality of branch pipes; lower exhaust branch pipes are arranged at equal intervals at the downward position of each square tube and a bubble ball is arranged at the end of each lower exhaust branch pipe, and the bubble ball is buried 5-10 cm below the sewage surface.

[0012] In other embodiments of the present invention, the water depth of the second microbial wastewater treatment reservoir is 1.2-1.5 m, and the wastewater volume in the second microbial wastewater treatment reservoir is 50-100 m 2 .

[0013] In other embodiments of the present invention, the volume of sewage stored in the first microbial sewage treatment reservoir is 2-2.5 times the volume of sewage stored in all small second microbial sewage treatment reservoirs.

[0014] In the present invention, the sewage has a large gravitational potential energy after being transported to the sewage treatment plant, and the gravitational potential energy is used to generate a wind flow to supplement and increase oxygen in the second microbial treatment sewage storage tank, thereby fully utilizing the potential energy to increase oxygen; The sewage pool is built in three levels. The first level is the sewage storage tank. The sewage flowing out of the sewage storage tank flows into the falling liquid blowing structure to generate kinetic energy to drive the air flow and then increase oxygen. It can also increase oxygen for the flowing sewage in the air and then fall into the first microbial treatment sewage storage tank. The sewage after oxygenation undergoes primary aerobic microbial proliferation and decomposition of harmful organic matter. After decomposing the harmful organic matter, when the microbial concentration reaches a certain concentration, the dissolved oxygen content decreases, which is not conducive to the growth of microorganisms. At this time, the sewage in the first microbial treatment sewage storage tank is discharged into the second microbial treatment sewage storage tank for discharge and increase. Oxygen, discharge oxygenation process, there will be a period of time to increase the proliferation of microorganisms and decompose harmful organic matter, but then the oxygen content will drop rapidly. At this time, the sewage storage tank is started to discharge sewage to the first microbial treatment sewage storage tank. During the sewage discharge process, the corresponding second microbial treatment sewage storage tank is further oxygenated by the falling liquid blowing structure to increase the final stage of microbial decomposition. After reaching the standard for decomposing harmful organic matter, the sewage in the second microbial treatment sewage storage tank is discharged. The energy utilization of the whole process is mainly the gravitational potential energy of the sewage, and the loss of electrical energy is very small, which improves energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic structural diagram of a microbial sewage treatment device with self-oxygenation function proposed by the present invention.

[0016] Figure 2 It is a structural schematic diagram of the liquid falling blowing structure proposed in the present invention.

[0017] Figure 3 This is a schematic cross-sectional structure diagram of the blower position proposed in the present invention.

[0018] Figure 4 This is a top view of the oxygenation pipeline proposed by the present invention.

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the oxygenation pipeline proposed in the present invention.

[0020] Figure 6 This is a schematic structural diagram of the second splashing station in the sewage storage tank for microbial treatment proposed by the present invention.

[0021] In the figure: 1. sewage storage tank; 2. first sewage pipe; 3. falling liquid blowing structure; 30. air flow pipe; 301. square pipe; 302. lower exhaust branch pipe; 303. bubble ball; 31. water wheel; 32. blower; 321. air inlet strip hole; 33. driving shaft; 331. vortex blade paddle; 332. driven gear plate; 34. bearing; 35. air collecting pipe; 4. first microbial treatment sewage storage tank; 5. second sewage pipe; 6. sewage storage tank; 61. splashing table. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] like Figure 1-6 , a microbial sewage treatment device with a self-oxygenation function, comprising a sewage storage tank 1, a first microbial sewage treatment storage tank 4 and a plurality of small second microbial sewage treatment storage tanks 6; The volume of the sewage storage tank 1 is larger than the volume of the first microbial treatment sewage storage tank 4. The sewage storage tank 1 is arranged beside the first microbial treatment sewage storage tank 4, and the bottom of the sewage storage tank 1 is 5-10m higher than the top of the first microbial treatment sewage storage tank 4. A plurality of second microbial treatment sewage storage tanks 6 are arranged in a row beside the first microbial treatment sewage storage tank 4. The bottom of the first microbial treatment sewage storage tank 4 is 1.0-1.5m higher than the top of the second microbial treatment sewage storage tank 6. A row of first row sewage pipes 2 is arranged near the bottom of the side wall of the sewage storage tank 6 facing the first microbial treatment sewage storage tank 4, each The bottom ends of the first sewage pipes 2 are all located above the pool mouth of the first microbial sewage treatment reservoir 4. A liquid drop blowing structure 3 is set up at the bottom end of each of the first sewage pipes 2. The sewage discharged from the first sewage pipes 2 enters the liquid drop blowing structure 3 and the air flow generated is discharged into the oxygenation pipeline provided in the corresponding second microbial sewage treatment reservoir 6 through the air flow pipe 30. A row of second sewage pipes 5 is provided near the bottom end of a side wall of the first microbial sewage treatment reservoir 4 facing the plurality of second microbial sewage treatment reservoirs 6. The bottom ends of the second sewage pipes 5 in a row extend to the pool mouth position of the corresponding second microbial sewage treatment reservoir 6. The liquid falling blowing structure 3 includes a waterwheel 31 and a blower 32. The rotating shaft of the waterwheel 31 is installed on the bracket and one end of the rotating shaft extends to the outside of the bracket and is provided with a driving gear plate at the end. The driving shaft 33 of the blower 32 extends outside the cylinder and is provided with a driven gear plate 332 at the end of the driving shaft 33. The driving gear plate is meshed with the driven gear plate 332. The blower 32 is also installed on the bracket. The air outlet of the blower 32 is discharged into the oxygen enrichment pipeline through the airflow pipe 30.

[0024] When sewage flows into the sewage storage tank 1, its potential energy loss is small, so as to ensure that the sewage storage tank 1 has sufficient potential energy. The sewage is slowly discharged through multiple fine pipes (the first sewage pipe 2), which greatly increases the amount of dissolved oxygen discharged to achieve the purpose of oxygenation. Microorganisms are added to the first microbial treatment sewage storage tank 4 for decomposition and microbial proliferation and growth. In the early stage, proliferation is mainly carried out. When the microbial decomposition takes 6-10 hours (6-7 hours in summer and about 10 hours in winter), the microbial concentration reaches a high level. This is because the dissolved oxygen concentration becomes low and is no longer suitable for microbial growth. Then, the sewage from the first microbial treatment sewage storage tank 4 is discharged into the second microbial treatment sewage storage tank 6. The discharge process is the oxygenation process. Due to the slow discharge, the discharge time is set according to needs. Generally, it takes 0.5-2 hours to fill the second microbial treatment sewage storage tank 6. This process increases The amount of oxygen is large, and during this period, the sewage microorganisms discharged into the second microbial treatment sewage storage tank 6 can be further multiplied and decompose organic matter. After the discharge is completed (during the discharge process, the sewage storage tank 1 does not discharge sewage to the first microbial treatment sewage storage tank 4), the sewage storage tank 1 is started again to discharge sewage to the first microbial treatment sewage storage tank 4. During the drainage process, the sewage is flushed into the falling liquid blowing structure 3, and the falling liquid blowing structure 3 is driven to generate blowing. The wind enters the corresponding second microbial treatment sewage storage tank 6 along the air flow pipe, and bubbles are blown on the surface of the sewage in the second microbial treatment sewage storage tank 6 to increase oxygen. When the sewage storage tank 1 completes the discharge of sewage to the first microbial treatment sewage storage tank 4, the sewage treatment in the second microbial treatment sewage storage tank 6 is basically completed, and the sewage in the second microbial treatment sewage storage tank 6 is discharged to complete the cycle.

[0025] A first solenoid valve is provided in each of the first sewage pipes 2 in a row, and the first solenoid valves in each of the first sewage pipes 2 in a row are numbered in sequence, and a second solenoid valve is provided in each of the second sewage pipes 5 in a row, and the second solenoid valves in each of the second sewage pipes 5 in a row are numbered in sequence; The first solenoid valves in the first row of sewage pipes 2 correspond one to one in numbering order and the second solenoid valves in the second row of sewage pipes 5 correspond one to one in numbering order.

[0026] Each first sewage pipe 2 discharges a corresponding second microbial sewage treatment reservoir 6. When the first sewage pipe 2 is used to discharge sewage, the air blown therefrom will blow air into the second microbial sewage treatment reservoir 6 so as to reasonably blow air and oxygenate each second microbial sewage treatment reservoir 6.

[0027] The first solenoid valve is a flow control solenoid valve, and the speed of the first solenoid valve starting to discharge sewage is positively correlated with the ambient temperature. Due to the large difference in ambient temperature between summer and winter, the dissolved oxygen content is high when the temperature is low, but the bacterial reproduction speed is slow. It is just right that sewage is discharged slowly in winter to increase the reproduction time, and the dissolved oxygen is dissolved by air and the sewage surface, so the dissolved oxygen in the discharged sewage is relatively lower.

[0028] The first sewage pipe 5 is a bent pipe, which includes a horizontal pipe and a downwardly bent inclined pipe, and the angle between the inclined pipe and the horizontal plane is between 60-75 degrees. The slight inclination makes it easier for sewage to flow down the pipe and does not fall directly from the pipe, so that the liquid can gather and flow to the falling liquid blowing structure 3.

[0029] A splashing platform 61 is provided in the second microbial wastewater treatment tank 6 at the bottom end of the second sewage pipe 5 . The splashing platform 61 is installed in the second microbial wastewater treatment tank 6 through a supporting rod and the splashing platform 61 is higher than the sewage surface in the second microbial wastewater treatment tank 6 .

[0030] After the sewage flows down, it flows to the splashing platform 61, and the sewage will splash or flow around, greatly increasing the dissolved oxygen content. During the discharge process, there will be a period of time, and it will be in the oxygenation process until the second microbial treatment sewage storage tank 6 is filled. During this period, oxygenation is increased by discharge, and then the sewage storage tank 4 is started to discharge sewage into the second microbial treatment sewage storage tank 6 for oxygenation.

[0031] The blower cylinder 32 includes a wind cylinder, an air collecting pipe 35 and a vortex blade paddle 331. One end of the wind cylinder is closed and the other end is connected to the air collecting pipe 35. The wind cylinder passes through a driving shaft 33 from the closed end and is provided with bearings 34 at both ends of the wind cylinder. Two bearings are fixedly installed in the wind cylinder with a cross. Four air inlet strip holes 321 are provided on a circle of the side wall of the wind cylinder near the closed end.

[0032] When the waterwheel 31 is impacted by the flowing sewage, it will rotate, driving the rotating shaft to rotate. The diameter of the driving gear plate on the rotating shaft is 8-15 times or larger than that of the driven gear plate 3. Since the air blast resistance is small, it is easy to drive. The driving shaft 33 is driven to rotate, thereby driving the vortex bladed paddle 331 to achieve air blast.

[0033] The aeration pipeline includes a plurality of square tubes 301 which gradually become smaller from the outside to the inside, and the square tubes 301 are sleeved one by one from the outside to the inside. The sleeved square tubes 301 are interconnected by pipelines. The end of the airflow tube 30 is arranged at the center of the aeration pipeline, and the end of the airflow tube 30 is connected to the innermost circle of square tubes 30 through a plurality of branch pipes; each of the square tubes 30 is provided with lower exhaust branch pipes at equal intervals at the downward position, and each end of the lower exhaust branch pipe 302 is provided with a bubble ball 303, and the bubble ball 303 is buried 5-10 cm below the sewage surface.

[0034] The blast air will flow from the air flow duct into the oxygenation duct, and after being evenly diffused in the oxygenation duct, it will be discharged from each lower exhaust branch pipe, and then discharged from the bubble ball 303 to the sewage surface for oxygenation to achieve oxygenation.

[0035] The water depth of the second microbial treatment sewage reservoir 6 is 1.2-1.5m, and the sewage volume in the second microbial treatment sewage reservoir 6 is 50-100m 2 The water depth should not be too great, otherwise the dissolved oxygen at the bottom will be too low, and the oxygenation effect cannot be achieved. It is difficult for the microorganisms in the second microbial sewage treatment reservoir 6 to complete the final decomposition. Therefore, it is best to control the water depth to about 1 meter.

[0036] The volume of sewage stored in the first microbial sewage treatment reservoir 4 is 2-2.5 times the volume of sewage stored in all the small second microbial sewage treatment reservoirs 6. This ensures that after about half of the sewage in the first microbial sewage treatment reservoir 4 is discharged each time, the remaining half is used for continued proliferation (at this time, the sewage reservoir 4 discharges sewage into the second microbial sewage treatment reservoir 6 to dilute the concentration of microorganisms). If the dilution concentration of microorganisms is too low during the sewage discharge process, microbial powder can be appropriately supplemented.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A microbial sewage treatment device with self-oxygenation function, characterized in that: It includes a sewage storage tank (1), a first microbial treatment sewage storage tank (4) and a plurality of small second microbial treatment sewage storage tanks (6); The volume of the sewage storage tank (1) is larger than the volume of the first microbial treatment sewage storage tank (4). The sewage storage tank (1) is arranged beside the first microbial treatment sewage storage tank (4), and the bottom of the sewage storage tank (1) is 5-10 meters higher than the top of the first microbial treatment sewage storage tank (4). A plurality of second microbial treatment sewage storage tanks (6) are arranged in a row beside the first microbial treatment sewage storage tank (4), and the bottom of the first microbial treatment sewage storage tank (4) is 1.0-1.5 meters higher than the top of the second microbial treatment sewage storage tank (6). A row of first row sewage pipes (2) are arranged near the bottom of the side wall of the sewage storage tank (6) facing the first microbial treatment sewage storage tank (4), each The bottom ends of the first sewage pipes (2) are all located above the pool mouth of the first microbial sewage treatment tank (4). A liquid drop blowing structure (3) is set up at the bottom end of each of the first sewage pipes (2). The sewage discharged from the first sewage pipes (2) enters the liquid drop blowing structure (3) and the air flow generated is discharged into the oxygenation pipe provided in the corresponding second microbial sewage treatment tank (6) through the air flow pipe (30). A row of second sewage pipes (5) is provided near the bottom end of a side wall of the first microbial sewage treatment tank (4) facing the plurality of second microbial sewage treatment tanks (6). The bottom ends of the second sewage pipes (5) extend to the pool mouth positions of the corresponding second microbial sewage treatment tanks (6). The liquid falling air blowing structure (3) comprises a water wheel (31) and a blower (32), wherein the rotating shaft of the water wheel (31) is mounted on a bracket and one end of the rotating shaft extends to the outside of the bracket and is provided with a driving gear plate at the end, and the driving shaft (33) of the blower (32) extends to the outside of the cylinder and is provided with a driven gear plate (332) at the end of the driving shaft (33), and the driving gear plate is meshed with the driven gear plate (332), and the blower (32) is also mounted on the bracket, and the air outlet of the blower (32) is discharged into the oxygenation pipeline through the air flow pipe (30).

2. The microbial sewage treatment device with self-oxygenation function according to claim 1 is characterized in that: Each of the first-row sewage pipes (2) in a row is provided with a first solenoid valve, and the first solenoid valves in the first-row sewage pipes (2) in a row are numbered in sequence; each of the second-row sewage pipes (5) in a row is provided with a second solenoid valve, and the second solenoid valves in the second-row sewage pipes (5) in a row are numbered in sequence; The first solenoid valves in a row of the first row of sewage pipes (2) correspond one to one in numbering order to the second solenoid valves in a row of the second row of sewage pipes (5) in numbering order.

3. The microbial sewage treatment device with self-oxygenation function according to claim 2 is characterized in that: The first solenoid valve is a flow control solenoid valve, and the sewage discharge speed at which the first solenoid valve is started is positively correlated with the ambient temperature.

4. The microbial sewage treatment device with self-oxygenation function according to claim 1 is characterized in that: The first sewage pipe (5) is a bent pipe, which comprises a horizontal pipe and a downwardly bent inclined pipe, wherein the angle between the inclined pipe and the horizontal plane is between 60 and 75 degrees.

5. The microbial sewage treatment device with self-oxygenation function according to claim 1 is characterized in that: A splashing platform (61) is provided in the second microbiologically treated sewage storage tank (6) at the bottom end of the second sewage pipe (5); the splashing platform (61) is installed in the second microbiologically treated sewage storage tank (6) via a support rod and the splashing platform (61) is higher than the sewage surface in the second microbiologically treated sewage storage tank (6).

6. The microbial sewage treatment device with self-oxygenation function according to claim 1 is characterized in that: The blower cylinder (32) comprises a wind cylinder, an air collecting pipe (35) and a vortex blade propeller (331); one end of the wind cylinder is closed and the other end is connected to the air collecting pipe (35); the wind cylinder passes through a drive shaft (33) from the closed end and is provided with bearings (34) at both ends of the wind cylinder; two bearings are fixedly installed in the wind cylinder by a cross; and four air inlet strip holes (321) are provided on a circumference of a side wall of the wind cylinder close to the closed end.

7. The microbial sewage treatment device with self-oxygenation function according to claim 1 is characterized in that: The aeration pipeline comprises a plurality of square tubes (301) which gradually become smaller from the outside to the inside, and the square tubes (301) are sleeved one by one from the outside to the inside, and the sleeved square tubes (301) are connected to each other by pipelines; an end of an airflow tube (30) is arranged at the center of the aeration pipeline, and the end of the airflow tube (30) is connected to the innermost square tube (30) through a plurality of branch pipes; lower exhaust branch pipes are arranged at equal intervals at the downward position of each square tube (30), and a bubble ball (303) is arranged at the end of each lower exhaust branch pipe (302), and the bubble ball (303) is buried 5-10 cm below the sewage surface.

8. The microbial sewage treatment device with self-oxygenation function according to claim 1 is characterized by: The water depth of the second microbial treatment sewage reservoir (6) is 1.2-1.5 m, and the sewage volume in the second microbial treatment sewage reservoir (6) is 50-100 m 2 .

9. The microbial sewage treatment device with self-oxygenation function according to claim 1 is characterized in that: The volume of sewage stored in the first microbial sewage treatment reservoir (4) is 2-2.5 times the volume of sewage stored in all the small second microbial sewage treatment reservoirs (6).

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