A bubble-free aeration enhanced in-situ biological treatment system

Abstract

The present invention discloses a bubble-free aeration enhanced in-situ biological treatment system, which relates to the field of groundwater remediation technology, including a recharge well pipe, an in-situ well pipe, a pumping well pipe, and an MABR membrane assembly. In the present invention, MABR is a bubble-free aerated bioreactor, which is a gas separation membrane as a biofilm carrier and supplies oxygen thereto. The present invention selects a dead-end membrane assembly, which has a high oxygen transfer rate and a huge specific surface area of ​​the biofilm carrier; the MABR membrane is an ultra-thin microporous hollow fiber membrane, and the gas is transferred from the inside of the membrane to the outside of the membrane under a certain air pressure. During aeration, the gas enters the water body as extremely small bubbles, and volatile pollutants are not easy to escape from the water, so the pollutants can be treated in the water; the membrane has good biological affinity, is easy to carry out biological film hanging, and can use biological methods to treat pollutants; the present invention requires a small amount of aeration and a small amount of medicine compared to traditional aeration treatment methods, and has good economic performance.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater remediation, in particular to a bubble-free aeration enhanced in-situ biological treatment system. Background Art

[0002] Groundwater pollution treatment and remediation technology and soil pollution treatment and remediation technology are currently the most important pollution remediation technologies. Most pollution remediation technologies inject chemical agents into groundwater to repair underground pollution. Excessive injection of chemical agents will cause soil compaction and secondary pollution. Enhanced in-situ biological technology has the advantages of little interference with groundwater and no secondary pollution. In recent years, it has received widespread attention from the society.

[0003] The patent (CN115518973A) discloses a groundwater pollution remediation system and method, including a first injection device and a second injection device, the first injection device includes a first injection part extending to the groundwater layer, the first injection device can inject the bacterial agent into the groundwater pollution plume through the first injection part; the second injection device includes a second injection part extending to the groundwater layer, the second injection device can inject air into the groundwater pollution plume through the second injection part; the first injection part is located downstream of the groundwater layer relative to the second injection part. The present invention increases the dissolved oxygen concentration in the groundwater by in-situ aeration of the groundwater pollution plume, improves the metabolic rate of microorganisms, and allows air to fully contact with microorganisms, and continuous aeration produces bubbles to provide an interface for the growth and reproduction of microorganisms, thereby improving the uniformity of microorganisms in the groundwater and improving the overall efficiency of microorganisms in remediating groundwater pollution.

[0004] The groundwater pollution remediation system in the above patent document requires a large amount of aeration, and volatile pollutants are easy to escape from the water, causing pollution to the external environment of groundwater remediation. Summary of the invention

[0005] The object of the present invention is to provide a bubble-free aeration enhanced in-situ biological treatment system to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a bubble-free aeration enhanced in-situ biological treatment system, comprising a recharge well pipe, an in-situ well pipe, and a pumping well pipe, wherein the in-situ well pipe is arranged between the recharge well pipe and the pumping well pipe, the recharge well pipe is arranged upstream of the groundwater flow, the pumping well pipe is arranged downstream of the groundwater flow, an MABR membrane assembly is arranged inside the in-situ well pipe, the MABR membrane assembly is connected to an air storage tank through an air pipe, the air storage tank is externally connected to an air compressor, and sealing members are respectively arranged on the tops of the recharge well pipe, the in-situ well pipe, and the pumping well pipe.

[0007] Furthermore, a dosing pipe is provided inside the in-situ well pipe, and the dosing pipe is connected to a medicine box on the outside of the in-situ well pipe. The re-injection well pipe and the pumping well pipe are connected by a water pipe, and a water pump is provided on the water pipe. An air extraction pipe is provided on the top of the pumping well pipe, and an air extraction pipe is connected to an air pump at one end away from the pumping well pipe. The air extraction pipe is connected to an activated carbon box, and a plurality of re-injection well flower holes are provided on the outer wall of the re-injection well pipe, a plurality of in-situ well flower holes are provided on the outer wall of the in-situ well pipe, and a plurality of pumping well flower holes are provided on the outer wall of the pumping well pipe.

[0008] Furthermore, the water pipe near one end of the well pipe of the pumping well is connected to the water inlet of the water pump, and the water pipe near one end of the well pipe of the recharging well is connected to the water inlet of the water pump.

[0009] Furthermore, a concrete layer is provided on the outer sides of the tops of the well pipes of the reinjection well, the well pipes of the in-situ well and the well pipes of the pumping well, and the top of the MABR membrane assembly is fixedly connected to the top of the inner wall of the well pipe of the in-situ well by a rope.

[0010] Furthermore, the medicine box, gas storage tank, air compressor, water pump, air extractor, and activated carbon box are all arranged on the top of the concrete layer.

[0011] Furthermore, the in-situ well flower hole is opened from the bottom of the in-situ well pipe to the groundwater level, the recharge well flower hole is opened from the bottom of the recharge well pipe to 20 to 30 cm above the groundwater level, and the in-situ well flower hole is opened from the bottom of the pumping well pipe to 30 to 50 cm below the concrete layer.

[0012] Furthermore, a plurality of movably connected activated carbon plates are obliquely installed inside the activated carbon box, a rack is symmetrically provided on the inner wall of the activated carbon box on one side of the activated carbon plate, a movably connected support shaft is provided between the rack and the activated carbon plate inside the activated carbon box, a gear matching the rack is sleeved on the outer wall of the support shaft, a plurality of fan blades are provided on the outer wall of the support shaft between two adjacent fan blades, and a support sleeve is sleeved on the outer wall of the support sleeve with a brush.

[0013] Furthermore, an air inlet is provided at the bottom of the outer wall of the activated carbon box near the rack, an exhaust port is provided on the other side of the outer wall of the activated carbon box, a socket matching the activated carbon board is provided at the bottom of the inner wall of the activated carbon box, a guide sleeve matching the activated carbon board is provided at the top of the inner wall of the activated carbon box, a support sheet is provided on the top of the activated carbon board above the activated carbon box, the socket is provided on the side of the inner wall of the activated carbon box near the air inlet, and the guide sleeve is provided on the side of the inner wall of the activated carbon box near the exhaust port.

[0014] Furthermore, a slide rail is provided on the inner wall of the activated carbon box between the rack and the activated carbon plate, and sliders matching the slide rail are symmetrically rotatably provided at both ends of the support shaft, and a plurality of rotatably connected balls are symmetrically provided on both sides of the outer wall of the slider.

[0015] Furthermore, the rack, the activated carbon plate, and the slide rail are parallel to each other, the support shaft and the slide rail are perpendicular to each other, and the support shaft and the activated carbon plate are parallel to different planes.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0017] 1. The present invention sets a well pipe for a recharge well, a well pipe for an in-situ well, a well pipe for a pumping well, and a MABR membrane assembly. The MABR membrane assembly is made of a hollow fiber membrane and an integrated unit. The size of the MABR membrane assembly is determined according to the actual site. MABR is a bubble-free aerated bioreactor, which is a gas separation membrane that serves as a biofilm carrier and supplies oxygen to it. The MABR membrane assembly is connected to a gas storage tank through a gas transmission pipe, and the MABR membrane assembly is fixed by a rope. The MABR membrane needs to be biofilmed in the early stage of operation. The present invention selects a dead-end membrane assembly, which has a higher oxygen transfer rate and a huge specific surface area of ​​the biofilm carrier; by adjusting the aeration Pressure is used to control the mass transfer of oxygen from the membrane component to the dissolved oxygen concentration gradient in the biofilm. The biofilm structure is an aerobic layer in the inner layer, an anaerobic layer in the middle layer, and an anaerobic layer in the outer layer. The MABR membrane is an ultra-thin microporous hollow fiber membrane. Because the membrane has a high bubble point, the gas is transferred from the inside of the membrane to the outside of the membrane under a certain air pressure. During aeration, the gas enters the water body in the form of extremely small bubbles, and volatile pollutants are not easy to escape from the water, so the pollutants can be treated in the water. The membrane has good biological affinity, is easy to form biological biofilms, and can use biological methods to treat pollutants. Compared with traditional aeration treatment methods, the present invention requires a small amount of aeration, a small amount of medicine, and is more economical.

[0018] 2. In the present invention, an activated carbon plate, a rack, a support shaft, a gear, a fan blade, a support sleeve, and a brush are arranged. The vacuum pump extracts the reaction gas and transports it to the inside of the activated carbon box through the air inlet. The reaction gas impacts the fan blade of the support shaft, and the fan blade rotates. The fan blade drives the support shaft to rotate, and the support shaft drives the gear and the support sleeve to rotate. The rack and the gear are meshed, and the gear moves upward along the rack during the rotation process, so that the support shaft moves upward along the rack during the rotation process, and the support shaft drives the support sleeve to rotate upward along the rack, so that the support sleeve rotates upward along the activated carbon plate, and the brush As the support sleeve rotates upward, the brush cleans the surface of the activated carbon plate, thereby improving the filtering performance of the activated carbon plate; when the vacuum pump stops working, air is no longer taken in into the activated carbon box, the fan blades lose thrust, the support shaft falls downward, the gears and racks engage, causing the support shaft to rotate during the falling process, and the fan blades blow air to the activated carbon plate as the support shaft rotates, and the support sleeve rotates with the support shaft, and the support sleeve drives the brush to roll and clean the surface of the activated carbon plate, thereby further improving the cleanliness of the surface of the activated carbon plate and improving the filtering and adsorption performance of the activated carbon plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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:

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

[0021] Figure 2 is a location distribution map of the well locations of the present invention;

[0022] Figure 3 It is a front view of the activated carbon box of the present invention;

[0023] Figure 4 is a front cross-sectional view of an activated carbon box of the present invention;

[0024] Figure 5 is a front cross-sectional view of the support shaft in the present invention;

[0025] Figure 6 It is a schematic diagram of the connection between the gear and the rack in the present invention;

[0026] Figure 7 It is a cross-sectional view of the connection between the slide rail and the slider in the present invention;

[0027] In the figure: 1. Recharge well pipe; 2. Recharge well hole; 3. Water pipe; 4. Air compressor; 5. Gas storage tank; 6. Gas pipeline; 7. Dosing pipe; 8. Medicine box; 9. In-situ well pipe; 10. In-situ well hole; 11. Rope; 12. MABR membrane assembly; 13. Water pump; 14. Pumping well pipe; 15. Pumping well hole; 16. Exhaust pipe; 17. Exhaust fan; 18. Activated carbon box; 19. Activated carbon plate; 20. Rack; 21. Support shaft; 22. Gear; 23. Fan blade; 24. Support sleeve; 25. Brush; 26. Air inlet; 27. Exhaust port; 28. Socket; 29. ​​Guide sleeve; 30. Support sheet; 31. Slide rail; 32. Slider; 33. Ball. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figure 1-2The bubble-free aeration enhanced in-situ biological treatment system shown in the figure comprises a recharge well pipe 1, an in-situ well pipe 9, and a pumping well pipe 14. The in-situ well pipe 9 is arranged between the recharge well pipe 1 and the pumping well pipe 14. The recharge well pipe 1 is arranged upstream of the groundwater flow, and the pumping well pipe 14 is arranged downstream of the groundwater flow. An MABR membrane assembly 12 is arranged inside the in-situ well pipe 9. The MABR membrane assembly 12 is connected to an air storage tank 5 through an air pipe 6. The air storage tank 5 is externally connected to an air compressor 4. The recharge well pipe 1, the in-situ well pipe 9, and the pumping well pipe 14 are respectively provided with sealing members on the top.

[0030] A dosing pipe 7 is provided inside the in-situ well pipe 9, and a medicine box 8 is connected to the dosing pipe 7 on the outside of the in-situ well pipe 9. The recharging well pipe 1 and the pumping well pipe 14 are connected by a water pipe 3, and a water pump 13 is provided on the water pipe 3. An air extraction pipe 16 is provided on the top of the pumping well pipe 14, and an air pump 17 is connected to the end of the air extraction pipe 16 away from the pumping well pipe 14, and the air pump 17 is connected to an activated carbon box 18. A plurality of recharging well flower holes 2 are provided on the outer wall of the recharging well pipe 1, a plurality of in-situ well flower holes 10 are provided on the outer wall of the in-situ well pipe 9, and a plurality of pumping well flower holes 15 are provided on the outer wall of the pumping well pipe 14; the water pipe 3 near one end of the pumping well pipe 14 is connected to the water inlet of the water pump 13, A water pipe 3 near one end of the recharge well pipe 1 is connected to the water inlet of the water pump 13; a concrete layer is provided on the outer sides of the tops of the recharge well pipe 1, the in-situ well pipe 9 and the pumping well pipe 14, and the top of the MABR membrane assembly 12 is fixedly connected to the top of the inner wall of the in-situ well pipe 9 by a rope 11; the medicine box 8, the gas storage tank 5, the air compressor 4, the water pump 13, the air pump 17 and the activated carbon box 18 are all arranged on the top of the concrete layer; the in-situ well flower hole 10 is opened from the bottom of the in-situ well pipe 9 to the groundwater level, the recharge well flower hole 2 is opened from the bottom of the recharge well pipe 1 to 20 to 30 cm above the groundwater level, and the in-situ well flower hole 10 is opened from the bottom of the pumping well pipe 14 to 30 to 50 cm below the concrete layer.

[0031] The specific implementation method is as follows: when in use, by setting the well pipe 1 of the reinjection well, the well pipe 9 of the in-situ well, the well pipe 14 of the pumping well, and the MABR membrane assembly 12;

[0032] Estimate the location of the recharge well, the in-situ well, and the pumping well according to the hydrogeological conditions of the groundwater contamination area on site; use a drilling rig to drill a well hole, with the final hole at the bottom of the polluted groundwater or 20-30cm below the deepest part of the pollution; after the well is drilled, build a well platform; harden the ground and lay 10-15cm of concrete on the ground; determine the location of the recharge well hole 2 and the in-situ well hole 10 according to the groundwater level; determine the location of the pumping well hole 15 30cm below the ground; determine the depth of the MABR membrane module 12 in the well according to the groundwater level, and determine the length of the MABR membrane module 12 according to the well depth. The size of the MABR membrane assembly 12 is determined according to the well diameter; the aeration pressure is tested according to the depth of the in-situ well, and the best is when there is no bubble; when the air pressure is 10kpa, it is more economical and has a good treatment effect; when aeration starts, nutrients such as carbon source, nitrogen source, phosphorus element, etc. are added to the wellhead of the in-situ well to carry out biological biofilm hanging; the pumping well is closed, the water pump starts to pump water to the recharging well, and the vacuum pump starts to operate to extract the waste gas in the groundwater and the air zone, and the tail gas is treated in the activated carbon box 18; the air compressor 4, the gas storage tank 5, and the vacuum pump 17 are regularly inspected and maintained, and the remaining liquid in the medicine box 8 is checked, and the activated carbon box 18 is checked;

[0033] The in-situ well pipe 9 is closed on top, and the in-situ well hole 10 is opened to the groundwater level. The MABR membrane assembly 12 is made of a hollow fiber membrane and an integrated unit. The size of the MABR membrane assembly 12 is determined according to the actual site. MABR is a bubble-free aerated bioreactor, which is a gas separation membrane that serves as a biofilm carrier and supplies oxygen for it. The MABR membrane assembly 12 is connected to the gas tank 5 through the gas pipeline 6, and the MABR membrane assembly 12 is fixed by a rope 11. The MABR membrane needs to be biofilmed in the early stage of operation. The gas tank 5 is arranged above the ground, and a pressure regulating valve is arranged at the gas outlet of the gas tank 5. The gas tank 5 is connected to the air compressor 4 through the gas pipeline 6, and the air compressor 4 is arranged on the ground Above, the upper part of the dosing pipe 7 is connected to the medicine box 8, and the lower part of the dosing pipe 7 is located above the MABR membrane assembly 12. The medicine box 8 is set on the ground, and the size of the medicine box 8 is set according to the actual site requirements. A water pipe 3 is set in the pumping well pipe 14, and the water pipe 3 is connected to a water pump 13. The water pump 13 is set above the ground. The water pump 13 transports the water in the pumping well to the reinjection well. The pumping well is sealed, and an exhaust fan 17 is arranged above the pumping well. The exhaust fan 17 is connected to the inside of the pumping well through an exhaust pipe 16. The exhaust fan 17 transports the gas to the activated carbon box 18 for exhaust gas treatment. The activated carbon box 18 is located on the ground, and the activated carbon box 18 is selected according to the size of the site.

[0034] The aeration mechanism of MABR technology in dense membrane and composite membrane is the dissolution diffusion theory, and the oxygen supply rate can be calculated by the formula:

[0035]

[0036] in is the oxygen transfer rate, mg / (L·s); K L is the diffusion coefficient, m / s; A is the specific surface area of ​​the membrane module, m 2 / m 3 ; C S is the dissolved oxygen concentration at the gas-liquid interface, mg / L; C is the actual concentration of dissolved oxygen in the liquid phase, mg / L.

[0037] The membrane materials of MABR can be divided into three categories: microporous membranes, such as polytetrafluoroethylene; dense membranes, such as silicone resin; and composite membranes in which a thin layer of dense membrane covers the microporous membrane; membrane components are divided into dead-end and live-end types. Dead-end MABR components refer to hollow fiber membranes with one end open and the other end sealed; live-end MABR components refer to hollow fibers with both ends open, allowing air to flow through the membrane pores.

[0038] The present invention uses a dead-end membrane module, which has a high oxygen transfer rate and a huge specific surface area of ​​the biofilm carrier; by adjusting the aeration pressure, the oxygen mass transfer from the membrane module to the dissolved oxygen concentration gradient in the biofilm is controlled, and the biofilm structure is an aerobic layer in the inner layer, an anaerobic layer in the middle layer, and an anaerobic layer in the outer layer;

[0039] The MABR membrane used is an ultra-thin microporous hollow fiber membrane. Because the membrane has a high bubble point, the gas transfers from the inside of the membrane to the outside of the membrane under a certain air pressure. During aeration, the gas enters the water body in the form of extremely small bubbles, and volatile pollutants are not easy to escape from the water, so the pollutants can be treated in the water; the membrane has good biological affinity, is easy to form biological biofilms, and pollutants can be treated by biological methods; compared with traditional aeration treatment methods, the present invention requires a small amount of aeration, a small amount of medicine, and better economy.

[0040] like Figure 1 and Figure 3-Figure 7A bubble-free aeration enhanced in-situ biological treatment system is shown, wherein a plurality of movably connected activated carbon plates 19 are obliquely arranged inside the activated carbon box 18, a rack 20 is symmetrically arranged on the inner wall of the activated carbon box 18 on one side of the activated carbon plate 19, a movably connected support shaft 21 is arranged inside the activated carbon box 18 between the rack 20 and the activated carbon plate 19, a gear 22 matching the rack 20 is sleeved on the outer wall of the support shaft 21, a plurality of blades 23 are arranged between two gears 22 on the outer wall of the support shaft 21, a support sleeve 24 is sleeved on the outer wall of the support shaft 21 between two adjacent blades 23, and a brush 25 is arranged on the outer wall of the support sleeve 24; a slide rail 31 is arranged on the inner wall of the activated carbon box 18 between the rack 20 and the activated carbon plate 19, sliders 32 matching the slide rail 31 are symmetrically arranged at both ends of the support shaft 21 for rotation, and a plurality of rotatably connected balls 33 are symmetrically arranged on both sides of the outer wall of the slider 32.

[0041] An air inlet 26 is provided at the bottom of the outer wall of the activated carbon box 18 near the rack 20, an exhaust port 27 is provided on the other side of the outer wall of the activated carbon box 18, a socket 28 matching the activated carbon board 19 is provided at the bottom of the inner wall of the activated carbon box 18, a guide sleeve 29 matching the activated carbon board 19 is provided at the top of the inner wall of the activated carbon box 18, a support sheet 30 is provided on the top of the activated carbon board 19 above the activated carbon box 18, the socket 28 is provided on the inner wall of the activated carbon box 18 near the air inlet 26, the guide sleeve 29 is provided on the inner wall of the activated carbon box 18 near the exhaust port 27 On one side; the reaction gas enters the activated carbon box 18 from the air inlet 26, and after entering the activated carbon box 18, it directly impacts the fan blades 23 at the bottom, and the reaction gas is discharged from the exhaust port 27 after being filtered; the socket 28 supports the activated carbon plate 19 at the bottom of the inner wall of the activated carbon box 18, and the guide sleeve 29 guides the activated carbon plate 19 at the top of the inner wall of the activated carbon box 18 to ensure the safety and stability of the installation and disassembly of the activated carbon plate 19; the support sheet 30 supports the top of the activated carbon plate 19, making the installation and disassembly of the activated carbon plate 19 more convenient.

[0042] The rack 20, the activated carbon plate 19, and the slide rail 31 are parallel to each other, the support shaft 21 and the slide rail 31 are perpendicular to each other, and the support shaft 21 and the activated carbon plate 19 are parallel to different planes; the support shaft 21 is ensured to move up and down along the activated carbon plate 19, thereby ensuring the cleaning effect of the brush 25 on the activated carbon plate 19.

[0043] The specific implementation method is as follows: when in use, by setting the activated carbon plate 19, the rack 20, the support shaft 21, the gear 22, the blade 23, the support sleeve 24, and the brush 25, the exhaust fan 17 extracts the reaction gas and transports it to the inside of the activated carbon box 18 through the air inlet 26, the reaction gas impacts the blade 23 of the support shaft 21, the blade 23 rotates, the blade 23 drives the support shaft 21 to rotate, the support shaft 21 drives the gear 22 and the support sleeve 24 to rotate, the rack 20 and the gear 22 are meshed, the gear 22 moves upward along the rack 20 during the rotation process, so that the support shaft 21 moves upward along the rack 20 during the rotation process, the support shaft 21 drives the support sleeve 24 to rotate upward along the rack 20, so that the support sleeve 24 moves along the activated carbon The plate 19 rotates upward, and the brush 25 rotates upward with the support sleeve 24. The brush 25 cleans the surface of the activated carbon plate 19 to improve the filtering performance of the activated carbon plate 19; when the vacuum pump 17 stops working, the activated carbon box 18 no longer takes in air, the fan blades 23 lose thrust, the support shaft 21 falls downward, the gear 22 and the rack 20 engage, so that the support shaft 21 rotates during the falling process, the fan blades 23 rotate with the support shaft 21 to blow air to the activated carbon plate 19, the support sleeve 24 rotates with the support shaft 21, and the support sleeve 24 drives the brush 25 to roll and clean the surface of the activated carbon plate 19, further improving the cleanliness of the surface of the activated carbon plate 19 and improving the filtering and adsorption performance of the activated carbon plate 19.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bubble-free aeration enhanced in-situ biological treatment system, comprising a reinjection well pipe (1), an in-situ well pipe (9), and a pumping well pipe (14), characterized in that: The in-situ well pipe (9) is arranged between the recharging well pipe (1) and the pumping well pipe (14); the recharging well pipe (1) is arranged upstream of the groundwater flow; the pumping well pipe (14) is arranged downstream of the groundwater flow; a MABR membrane assembly (12) is arranged inside the in-situ well pipe (9); the MABR membrane assembly (12) is connected to a gas storage tank (5) via a gas transmission pipe (6); the gas storage tank (5) is externally connected to an air compressor (4); the recharging well pipe (1), the in-situ well pipe (9), and the pumping well pipe (14) are connected to the in-situ well pipe (9); The top of the water well pipe (14) is respectively provided with a sealing member; a dosing pipe (7) is provided inside the in-situ well pipe (9); the dosing pipe (7) is connected to a medicine box (8) on the outside of the in-situ well pipe (9); the recharging well pipe (1) and the pumping well pipe (14) are connected via a water pipe (3); a water pump (13) is provided on the water pipe (3); an air extraction pipe (16) is provided at the top of the pumping well pipe (14); an end of the air extraction pipe (16) away from the pumping well pipe (14) is connected to an air pump ( 17), the vacuum pump (17) is connected to an activated carbon box (18), the outer wall of the recharging well pipe (1) is provided with a plurality of recharging well flower holes (2), the outer wall of the in-situ well pipe (9) is provided with a plurality of in-situ well flower holes (10), and the outer wall of the pumping well pipe (14) is provided with a plurality of pumping well flower holes (15); the activated carbon box (18) is provided with a plurality of movably connected activated carbon plates (19) at an angle, and the inner wall of the activated carbon box (18) is symmetrically provided with a rack ( 20), a support shaft (21) movably connected is provided between the rack (20) and the activated carbon plate (19) inside the activated carbon box (18), a gear (22) matching the rack (20) is sleeved on the outer wall of the support shaft (21), a plurality of blades (23) are provided on the outer wall of the support shaft (21) between two gears (22), a support sleeve (24) is sleeved on the outer wall of the support shaft (21) between two adjacent blades (23), and a brush (25) is provided on the outer wall of the support sleeve (24).

2. The bubble-free aeration enhanced in-situ biological treatment system according to claim 1, characterized in that: The water pipe (3) near one end of the pumping well pipe (14) is connected to the water inlet of the water pump (13), and the water pipe (3) near one end of the recharging well pipe (1) is connected to the water inlet of the water pump (13).

3. The bubble-free aeration enhanced in-situ biological treatment system according to claim 1, characterized in that: A concrete layer is provided on the outer sides of the tops of the reinjection well pipe (1), the in-situ well pipe (9) and the pumping well pipe (14), and the top of the MABR membrane assembly (12) is fixedly connected to the top of the inner wall of the in-situ well pipe (9) via a rope (11).

4. The bubble-free aeration enhanced in-situ biological treatment system according to claim 3, characterized in that: The medicine box (8), gas storage tank (5), air compressor (4), water pump (13), air extractor (17), and activated carbon box (18) are all arranged on the top of the concrete layer.

5. The bubble-free aeration enhanced in-situ biological treatment system according to claim 3, characterized in that: The in-situ well hole (10) is opened from the bottom of the in-situ well pipe (9) to the groundwater level, the recharging well hole (2) is opened from the bottom of the recharging well pipe (1) to 20 to 30 cm above the groundwater level, and the in-situ well hole (10) is opened from the bottom of the pumping well pipe (14) to 30 to 50 cm below the concrete layer.

6. The bubble-free aeration enhanced in-situ biological treatment system according to claim 1, characterized in that: An air inlet (26) is provided at the bottom of the outer wall of the activated carbon box (18) on the side close to the rack (20), an exhaust port (27) is provided at the other side of the outer wall of the activated carbon box (18), a socket (28) matching the activated carbon plate (19) is provided at the bottom of the inner wall of the activated carbon box (18), a guide sleeve (29) matching the activated carbon plate (19) is provided at the top of the inner wall of the activated carbon box (18), a support sheet (30) is provided at the top of the activated carbon plate (19) above the activated carbon box (18), the socket (28) is provided on the side of the inner wall of the activated carbon box (18) close to the air inlet (26), and the guide sleeve (29) is provided on the side of the inner wall of the activated carbon box (18) close to the exhaust port (27).

7. The bubble-free aeration enhanced in-situ biological treatment system according to claim 1, characterized in that: A slide rail (31) is provided on the inner wall of the activated carbon box (18) between the rack (20) and the activated carbon plate (19), and sliders (32) matching the slide rail (31) are symmetrically rotatably provided at both ends of the support shaft (21), and a plurality of rotatably connected balls (33) are symmetrically provided on both sides of the outer wall of the slider (32).

8. The bubble-free aeration enhanced in-situ biological treatment system according to claim 7, characterized in that: The rack (20), the activated carbon plate (19), and the slide rail (31) are parallel to each other, the support shaft (21) and the slide rail (31) are perpendicular to each other, and the support shaft (21) and the activated carbon plate (19) are parallel to each other in different planes.

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