Wetland water ecological restoration and sewage treatment device

Abstract

The invention provides a wetland water ecological restoration and sewage treatment device which comprises a floating bed, a cover body is arranged at the upper end of the floating bed, a solar power generation panel is arranged on the outer side of the cover body, a storage battery, a blast aeration pump and an integrated circuit board are arranged in the cover body, and the outlet end and the inlet end of the blast aeration pump are communicated with a main air outlet pipe and an air inlet pipe respectively. A plurality of aeration pipes are downwards arranged on the floating bed, at least two jet propulsion pipes are downwards arranged at the lower end of the floating bed, the aeration pipes and the jet propulsion pipes are communicated with a main air outlet pipe through an air delivery pipe, and an electromagnetic valve is arranged on the air delivery pipe; a U-shaped mounting seat is arranged on one side of the floating bed, a winding shaft is rotatably connected in the U-shaped mounting seat, a winding motor is mounted on the U-shaped mounting seat, a photocatalytic film is wound on the winding shaft, two cleaning rotating shafts rotating in the same direction are rotatably connected to one side, far away from the floating bed, of the winding shaft, and a cleaning motor is mounted on one side of the U-shaped mounting seat. The device is small in size, can freely move on the water surface for water restoration, and is suitable for wetland ecological water restoration.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment and relates to a wetland water ecological restoration and sewage treatment device. Background Art

[0002] Wetland ecosystems are known as the "Kidneys of the Earth" for their unique natural filtering and water purification functions, and they play an extremely important role in nature. Wetlands are not only habitats for many animals and plants, but also an important part of maintaining regional hydrological balance. Wetlands can effectively remove suspended particles, nutrients, heavy metals and organic pollutants in water bodies through physical sedimentation, chemical adsorption and biological metabolism, thereby purifying water quality.

[0003] In its natural state, wetland ecosystems have a certain self-purification ability. When the water body is slightly polluted, the plants, soil and microorganisms in the wetland work together to gradually convert pollutants into harmless substances and maintain the cleanliness of the water body. For example, wetland plants such as reeds and cattails can absorb pollutants through their roots and convert them into nutrients in the plant body; organic matter and minerals in the soil can absorb pollutants; and microbial communities in wetlands can degrade organic pollutants into harmless substances such as carbon dioxide and water.

[0004] However, with the development of social economy, a large amount of untreated or inadequately treated industrial wastewater, agricultural runoff and domestic sewage are discharged into natural water bodies, causing unprecedented pressure on wetland ecosystems. When the concentration of pollutants exceeds the self-purification capacity of wetlands, the structure and function of the ecosystem in the water body will be seriously affected, leading to deterioration of water quality and even causing eutrophication, algal blooms and other problems, threatening the health and stability of wetland ecosystems.

[0005] In this case, the natural purification capacity of wetlands alone is no longer sufficient to deal with serious water pollution problems. Therefore, artificial intervention measures must be taken to accelerate the ecological restoration process of wetlands. At present, most sewage treatment technologies are based on large centralized treatment facilities, which usually rely on complex mechanical equipment and chemical agents to remove pollutants. Although this method can effectively remove pollutants to a certain extent, its construction and operation costs are high, and it occupies a large area, making it difficult to flexibly apply to natural environments such as wetlands. Summary of the invention

[0006] The purpose of the present invention is to provide a wetland water ecological restoration and sewage treatment device, which is small in size, low in cost, can move freely on the water surface to perform water restoration, and is suitable for wetland ecological water restoration.

[0007] In order to solve the above technical problems, the present invention provides a wetland water ecological restoration and sewage treatment device, including a floating bed, a cover body is arranged at the upper end of the floating bed, a solar power generation panel is arranged on the outer side of the cover body, a battery, an air blast aeration pump and an integrated circuit board are arranged in the cover body, a wireless communication module is arranged on the integrated circuit board, the outlet end of the air blast aeration pump is connected with a total air outlet pipe, the inlet end of the air blast aeration pump is connected with an air inlet pipe, the free end of the air inlet pipe is connected with an air inlet channel extending out of the cover body, a plurality of aeration pipes are arranged downward on the floating bed, the free end of each aeration pipe is covered with a mesh sleeve, each mesh sleeve is provided with a porous sponge sleeve corresponding to the aeration pipe, each aeration pipe is provided with a plurality of aeration holes in the corresponding porous sponge sleeve, at least two jet propulsion pipes are arranged downward on the lower end of the floating bed, each aeration pipe and each jet propulsion pipe are connected with the total air outlet pipe through an air supply pipe, and each air supply pipe is provided with a solenoid valve;

[0008] A U-shaped mounting seat is provided on one side of the floating bed, a winding shaft is rotatably connected in the U-shaped mounting seat, a winding motor for driving the winding shaft to rotate is installed on one side of the U-shaped mounting seat, a photocatalytic film is wound on the winding shaft, a photocatalytic layer is coated on the surface of the photocatalytic film, a plurality of hollow floating strips distributed along the length direction are provided on the photocatalytic film along its width direction, the U-shaped mounting seat is rotatably connected to two cleaning shafts distributed up and down on the side of the winding shaft away from the floating bed, a transmission gear is provided at one end of each cleaning shaft, and the two transmission gears are meshed with each other, a cleaning motor is installed on one side of the U-shaped mounting seat, a power output shaft of the cleaning motor is connected to one of the cleaning shafts, each cleaning shaft is covered with a soft-bristle roller brush, and the photocatalytic film passes between the two soft-bristle roller brushes.

[0009] By adopting the above technical solution, after the device is placed in the water, the two solenoid valves connected to the jet propulsion pipe are first controlled to open, and the aeration pump is operated to make the jet propulsion pipe have airflow to push the device to move in the water. During the movement, the opening degree of the two solenoid valves is controlled to control the strength of the airflow, so as to control the thrust on both sides respectively. When there is a difference in thrust on both sides, turning can be achieved, and finally the device can be controlled to move in the water;

[0010] After entering the water, close the solenoid valve used for traveling and open the other solenoid valves to allow the airflow to be discharged from the aeration holes of the aeration pipe, and decompose into tiny bubbles after passing through the porous sponge sleeve and mesh sleeve, which not only helps to increase the oxygen content in the water, but also can further reduce the interference with aquatic organisms;

[0011] After the device enters the water, the winding motor rotates in the opposite direction, gradually releasing the photocatalytic film on the winding shaft, and the cleaning motor drives the soft-bristled roller brush to rotate outward, gradually pushing the photocatalytic film into the water, and forming a wave shape in the water under the action of the hollow floating strip. Under the action of light, electron-hole pairs will be generated on the catalyst surface. These electrons and holes can migrate to the catalyst surface and react with oxygen or water molecules adsorbed thereon to form free radicals with strong oxidizing properties. These free radicals can degrade organic pollutants adsorbed on the membrane surface and convert them into harmless substances such as carbon dioxide and water.

[0012] During long-term use, some dirt is easily attached to the surface of the photocatalytic membrane, blocking the light and affecting the catalytic effect. At this time, the winding motor can be started to drive the winding shaft to rotate and retract the photocatalytic membrane. During the process, the cleaning motor drives the soft-bristle roller brush to rotate outward, gradually brushing off the dirt on the surface of the photocatalytic membrane. The photocatalytic membrane after self-cleaning is put into the water again for photocatalytic wastewater purification.

[0013] The present invention is further configured such that each jet propulsion tube is rotatably connected with a propulsion shaft, a plurality of spiral blades are arranged on the outer side of each propulsion shaft, each propulsion shaft extends out of the corresponding jet propulsion tube and is provided with a propulsion impeller, and the spiral direction of each propulsion impeller is the same as the spiral direction of the corresponding spiral blade.

[0014] The present invention is further configured such that hollow rotating sleeves are provided at both ends of each jet propulsion tube, and rotating grooves rotatably connected to the corresponding hollow rotating sleeves are provided at both ends of each propulsion shaft.

[0015] The present invention is further configured such that a roller brush cleaning belt is provided at the free edge of the photocatalytic film, rough protrusions are provided on both sides of the roller brush cleaning belt, and a blocking strip is provided at the free edge of the roller brush cleaning belt.

[0016] The present invention is further configured such that a cross section of the blocking strip is V-shaped with a tip facing the floating bed.

[0017] The present invention is further configured such that a mounting post is provided at the upper end of the cover body, and a plurality of outwardly disposed smart cameras are mounted at the upper end of the mounting post.

[0018] The present invention is further configured such that a sound-absorbing cotton layer is provided on the inner wall of the cover body.

[0019] The present invention is further configured such that the photocatalyst layer is titanium dioxide.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] First, the present invention is small in size and can move freely on the water surface for water restoration. It is suitable for wetland ecological water restoration. The equipment is compactly designed, which is convenient for flexible deployment in natural waters such as wetlands. It can float or move freely on the water surface, expand the restoration range, and improve the restoration efficiency. It is particularly suitable for water restoration needs under different terrain and water depth conditions.

[0022] Secondly, the present invention uses aeration to increase the oxygen content in water to purify water quality. During the process, large bubbles are refined into small bubbles through a porous sponge sleeve, which significantly improves the oxygen transfer efficiency, better increases the oxygen content in water, promotes microbial activity, accelerates the degradation of organic matter, and prevents clogging by dirt, thereby ensuring the long-term stable operation of the aeration system.

[0023] Third, the present invention can freely lay a wavy photocatalytic membrane in water for photocatalytic water purification. The photocatalytic membrane can be freely laid in water to increase the photocatalytic area. The wavy design increases the contact area between the membrane and water, improves the photocatalytic efficiency, ensures efficient degradation of organic pollutants under sunlight, and achieves the effect of purifying water quality.

[0024] Fourthly, the present invention can also perform self-cleaning on the photocatalytic film, prevent dirt from adhering, keep the film surface clean, and ensure that the film surface will not block light due to dirt accumulation, thereby maintaining the high efficiency of photocatalysis, reducing maintenance frequency, extending service life, and ensuring that the photocatalytic film can function stably and long-term. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a partial cross-sectional view used to show the internal structure of the cover;

[0027] Figure 3 It is a partial cross-sectional view used to show the connection between the aeration pipe and the porous sponge sleeve and the mesh sleeve;

[0028] Figure 4 It is an exploded view used to show the connection between the jet propulsion tube and the propulsion shaft;

[0029] Figure 5 Used to demonstrate the connection between the two cleaning shafts and the connection with the soft-bristle roller brush.

[0030] Among them, 1. floating bed; 11. U-shaped mounting base; 2. cover; 21. solar panel; 22. sound-absorbing cotton layer; 23. mounting column; 24. smart camera; 3. battery; 4. air blower aeration pump; 41. main air outlet pipe; 42. air inlet pipe; 43. air inlet channel; 44. air transmission pipe; 45. solenoid valve; 5. integrated circuit board; 6. aeration pipe; 61. mesh sleeve; 62. porous sponge sleeve; 63. aeration hole; 7. jet propulsion pipe; 71. propulsion shaft; 72. hollow rotating sleeve; 73. rotating groove; 74. spiral blade; 75. propulsion impeller; 8. winding shaft; 81. winding motor; 82. photocatalytic film; 83. hollow floating strip; 84. roller brush cleaning belt; 85. blocking strip; 9. cleaning shaft; 91. transmission gear; 92. cleaning motor; 93. soft-bristled roller brush. DETAILED DESCRIPTION

[0031] The following is a further detailed description of a wetland water ecological restoration and sewage treatment device proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will become clearer. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. The same or similar figure numbers in the drawings represent the same or similar parts.

[0032] Example, see Figure 1-5 A wetland water ecological restoration and sewage treatment device includes a floating bed 1, a cover 2 is arranged at the upper end of the floating bed 1, each side of the outer side of the cover 2 is provided with a solar power generation panel 21, and the inner wall of the cover 2 is provided with a layer of sound-absorbing cotton layer 22, which can effectively reduce the mechanical noise of the equipment running in the cover 2 and reduce the intrusion on the wetland environment organisms. A mounting column 23 is arranged at the upper end of the cover 2, and three outwardly arranged smart cameras 24 are installed on the upper end of the mounting column 23 to observe whether the device is close to the shore. A battery 3 is arranged in the cover 2. , an aeration pump 4 and an integrated circuit board 5. The electric energy generated by the solar panel 21 after light generation is directly stored in the battery 3. A wireless communication module is arranged on the integrated circuit board 5, which is convenient for remotely controlling the operation and movement of the floating bed 1 on the shore. The outlet end of the aeration pump 4 is connected to a main air outlet pipe 41, and the inlet end of the aeration pump 4 is connected to an air intake pipe 42. The free end of the air intake pipe 42 is connected to an air intake channel 43 extending out of the cover body 2. The air intake channel 43 extends out of the cover body 2 and then bends outward horizontally to prevent rainwater from entering.

[0033] The floating bed 1 is provided with three aeration pipes 6 downwardly, and the free end of each aeration pipe 6 is covered with a mesh sleeve 61, and the mesh sleeve 61 is used to prevent large particles of impurities in the water from entering. A porous sponge sleeve 62 corresponding to the aeration pipe 6 is provided in each mesh sleeve 61, and the porous sponge sleeve 62 is used to prevent small impurities in the water from entering and causing blockage. Each aeration pipe 6 is provided with a plurality of aeration holes 63 in the corresponding porous sponge sleeve 62. Two jet propulsion pipes 7 are provided downwardly at the lower end of the floating bed 1. The jet propulsion pipes 7 are horizontally arranged outwardly and at least two are arranged so that the direction of travel can be controlled by adjusting the jet amount respectively. A propulsion shaft 71 is rotatably connected in each jet propulsion pipe 7, and a hollow rotating sleeve 72 is provided at both ends of each jet propulsion pipe 7, and a rotating groove 73 rotatably connected to the corresponding hollow rotating sleeve 72 is provided at both ends of each propulsion shaft 71, and a plurality of spiral blades 74 are provided on the outer side of each propulsion shaft 71, and each propulsion shaft 71 extends outwardly from the corresponding jet propulsion pipe 71. The air propulsion pipe 7 is provided with a propulsion impeller 75. The spiral direction of each propulsion impeller 75 is the same as the spiral direction of the corresponding spiral blade 74. The jet can only generate vertical backward thrust. The rotation of the propulsion impeller 75 will generate spiral backward thrust, which is more helpful to push the device to move on the water surface. Each aeration pipe 6 and each jet propulsion pipe 7 are connected to the main air outlet pipe 41 through an air supply pipe 44. Each air supply pipe 44 is provided with an electromagnetic valve 45. The aeration and the movement of the device are controlled by adjusting the opening and closing of different electromagnetic valves 45, as well as the degree of opening.

[0034] A U-shaped mounting seat 11 is provided on one side of the floating bed 1, and a winding shaft 8 is rotatably connected inside the U-shaped mounting seat 11. A winding motor 81 for driving the winding shaft 8 to rotate is installed on one side of the U-shaped mounting seat 11. A photocatalytic film 82 is wound on the winding shaft 8. The surface of the photocatalytic film 82 is coated with a photocatalyst layer, and the photocatalyst layer is titanium dioxide. The photocatalytic film 82 is provided with a plurality of hollow floating strips 83 distributed along its length direction along its width direction. The photocatalytic film 82 has a large density and will sink into the water, and the hollow floating strips 83 can lift the photocatalytic film 82 from the middle section by section and float it on the water surface, forming a wave shape in the water, which can fully receive light and fully contact with pollutants in the water. The U-shaped mounting seat 11 is rotatably connected to two cleaning shafts 9 distributed up and down on the side of the winding shaft 8 away from the floating bed 1. A transmission gear 91 is provided at one end of each cleaning shaft 9. The two transmission gears 91 are meshed with each other, so that the two cleaning shafts 9 can rotate inward or outward at the same time. A cleaning motor 92 is installed on one side of the U-shaped mounting seat 11, and the power output shaft of the cleaning motor 92 is connected to one of the cleaning shafts 9. Each cleaning shaft 9 is covered with a soft-bristle roller brush 93. The photocatalytic film 82 passes between the two soft-bristle roller brushes 93. The soft-bristle roller brush 93 rotates to clean the attachments on the photocatalytic film 82. A roller brush cleaning belt 84 is provided at the free edge of the photocatalytic film 82, and rough protrusions are provided on both sides of the roller brush cleaning belt 84. When the photocatalytic film 82 is completely rolled up and retracted, the roller brush cleaning belt 84 is located between two soft-bristle roller brushes 93. The soft-bristle roller brushes 93 rotate on the roller brush cleaning belt 84, and the protrusions above can play a role in cleaning the soft-bristle roller brushes 93. A blocking strip 85 is provided at the free edge of the roller brush cleaning belt 84, and the cross section of the blocking strip 85 is V-shaped with the tip facing the floating bed 1. The blocking strip 85 can prevent the roller brush cleaning belt 84 from sliding inwards out between the soft-bristle roller brushes 93 when the soft-bristle roller brushes 93 rotate inwards for self-cleaning.

[0035] The three intelligent cameras 24 , the aeration pump 4 , each solenoid valve 45 , the winding motor 81 and the cleaning motor 92 are all electrically connected to the integrated circuit board 5 , and the operation and movement of each component are uniformly controlled by the integrated circuit board 5 .

[0036] Working principle: After the device is put into the water, firstly, the two electromagnetic valves 45 connected to the jet propulsion pipe 7 are controlled to open, and the aeration pump 4 is operated to make the jet propulsion pipe 7 have airflow ejected, pushing the device to move in the water. During the ejection process, the airflow pushes the spiral blade 74 to rotate, and finally drives the propulsion impeller 75 to rotate through the propulsion shaft 71, generating a spiral backward thrust, so that the device has more power to move forward. In the process of moving, the opening degree of the two electromagnetic valves 45 is controlled to control the strength of the airflow, and the thrust on both sides is controlled separately. When there is a difference in thrust on both sides, turning can be achieved, and finally the device can be controlled to move in the water;

[0037] After entering the water, the electromagnetic valve 45 for traveling is closed, and the other electromagnetic valves 45 are opened, so that the airflow is discharged from the aeration hole 63 of the aeration pipe 6, and decomposed into tiny bubbles after passing through the porous sponge sleeve 62 and the mesh sleeve 61, which not only helps to increase the oxygen content in the water, but also can further reduce the interference with the aquatic organisms;

[0038] After the device enters the water, the winding motor 81 rotates in the reverse direction, gradually releasing the photocatalytic film 82 on the winding shaft 8, and the cleaning motor 92 drives the soft-bristled roller brush 93 to rotate outward, gradually pushing the photocatalytic film 82 into the water, and forming a wave shape in the water under the action of the hollow floating strip 83. Under the action of light, electron-hole pairs will be generated on the catalyst surface. These electrons and holes can migrate to the catalyst surface and react with oxygen or water molecules adsorbed thereon to form free radicals with strong oxidizing properties. These free radicals can degrade organic pollutants adsorbed on the film surface and convert them into harmless substances such as carbon dioxide and water.

[0039] During long-term use, some dirt is easily attached to the surface of the photocatalytic film 82 to block light and affect the catalytic effect. At this time, the winding motor 81 can be started to drive the winding shaft 8 to rotate and retract the photocatalytic film 82. During the process, the cleaning motor 92 drives the soft-bristle roller brush 93 to rotate outward, gradually brushing off the dirt on the surface of the photocatalytic film 82. After reaching the roller brush cleaning belt 84, the hair roller brush continues to roll on the roller brush cleaning belt 84 for self-cleaning, and the dirt on the soft-bristle roller brush 93 is also cleaned. After self-cleaning, the photocatalytic film 82 is put into the water again for photocatalytic sewage purification;

[0040] When the device is floating on the water, the smart camera 24 starts to take pictures of the surrounding environment at regular intervals, and performs intelligent AI recognition based on the pictures to determine whether the device is blown to the shore by the wind. If the device is on the shore or close to the shore, the device is moved to the center of the water in the travel mode to drift freely and purify sewage.

[0041] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0042] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A wetland water ecological restoration and sewage treatment device, comprising a floating bed (1), wherein a cover (2) is provided at the upper end of the floating bed (1), characterized in that: A solar power generation panel (21) is arranged outside the cover body (2), a storage battery (3), an air blast aeration pump (4) and an integrated circuit board (5) are arranged inside the cover body (2), a wireless communication module is arranged on the integrated circuit board (5), an outlet end of the air blast aeration pump (4) is connected to a main air outlet pipe (41), an inlet end of the air blast aeration pump (4) is connected to an air intake pipe (42), a free end of the air intake pipe (42) is connected to an air intake channel (43) extending out of the cover body (2), and a plurality of aeration pipes (6) are arranged downwardly on the floating bed (1). The free end of each aeration tube (6) is covered with a mesh sleeve (61), each mesh sleeve (61) is provided with a porous sponge sleeve (62) covering the corresponding aeration tube (6), each aeration tube (6) is provided with a plurality of aeration holes (63) in the corresponding porous sponge sleeve (62), at least two jet propulsion pipes (7) are provided downwardly at the lower end of the floating bed (1), each aeration tube (6) and each jet propulsion pipe (7) are connected to the main air outlet pipe (41) through an air delivery pipe (44), and each air delivery pipe (44) is provided with a solenoid valve (45); A U-shaped mounting seat (11) is provided on one side of the floating bed (1), a winding shaft (8) is rotatably connected inside the U-shaped mounting seat (11), a winding motor (81) for driving the winding shaft (8) to rotate is installed on one side of the U-shaped mounting seat (11), a photocatalytic film (82) is wound on the winding shaft (8), a surface of the photocatalytic film (82) is coated with a photocatalyst layer, a plurality of hollow floating strips (83) distributed along the length direction of the photocatalytic film (82) are provided on the photocatalytic film (82) along its width direction, and the U-shaped mounting seat (11) is arranged at the side of the U-shaped mounting seat (11). The winding shaft (8) is rotatably connected to one side away from the floating bed (1) with two cleaning shafts (9) distributed up and down, and a transmission gear (91) is provided at one end of each cleaning shaft (9), and the two transmission gears (91) are meshed with each other. A cleaning motor (92) is installed on one side of the U-shaped mounting seat (11), and the power output shaft of the cleaning motor (92) is connected to one of the cleaning shafts (9). Each cleaning shaft (9) is covered with a soft-bristle roller brush (93), and the photocatalytic film (82) passes between the two soft-bristle roller brushes (93).

2. A wetland water ecological restoration and sewage treatment device according to claim 1, characterized in that: Each jet propulsion tube (7) is rotatably connected to a propulsion shaft (71), and a plurality of spiral blades (74) are arranged on the outer side of each propulsion shaft (71). Each propulsion shaft (71) extends out of the corresponding jet propulsion tube (7) and is provided with a propulsion impeller (75), and the spiral direction of each propulsion impeller (75) is the same as the spiral direction of the corresponding spiral blade (74).

3. A wetland water ecological restoration and sewage treatment device according to claim 2, characterized in that: Both ends of each jet propulsion tube (7) are provided with hollow rotating sleeves (72), and both ends of each propulsion rotating shaft (71) are provided with rotating grooves (73) rotatably connected to the corresponding hollow rotating sleeves (72).

4. A wetland water ecological restoration and sewage treatment device according to claim 1, characterized in that: A rolling brush cleaning belt (84) is provided at the free edge of the photocatalytic film (82), rough protrusions are provided on both sides of the rolling brush cleaning belt (84), and a blocking strip (85) is provided at the free edge of the rolling brush cleaning belt (84).

5. A wetland water ecological restoration and sewage treatment device according to claim 4, characterized in that: The cross section of the blocking strip (85) is V-shaped with the tip pointing toward the floating bed (1).

6. A wetland water ecological restoration and sewage treatment device according to claim 1, characterized in that: The upper end of the cover body (2) is provided with a mounting column (23), and the upper end of the mounting column (23) is provided with a plurality of outwardly arranged smart cameras (24).

7. A wetland water ecological restoration and sewage treatment device according to claim 1, characterized in that: The inner wall of the cover body (2) is provided with a sound-absorbing cotton layer (22).

8. A wetland water ecological restoration and sewage treatment device according to claim 1, characterized in that: The photocatalyst layer is titanium dioxide.

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