A multi-flow-state constructed wetland sewage treatment system and method thereof

Abstract

This application provides a multi-flow constructed wetland wastewater treatment system and method, relating to the field of wastewater treatment technology. It includes a wetland filter tank with frames fixedly installed on both sides. A partition plate is fixedly installed on the inner wall of the wetland filter tank. A drain pipe check valve is fixedly installed on both sides of the bottom of one side surface of the partition plate. An inlet and an outlet pipe are connected through the upper surface of the drain pipe check valve. Sludge separated in the set sedimentation zone can gradually flow downwards under its own gravity. The main flow plate below the main flow plate separates the sludge to both sides, while the secondary flow plate below it vertically guides the treated water out. Therefore, by increasing the area of ​​the flow guide component layer blocking the sludge, the likelihood of the sludge colliding with the main and secondary flow plates and falling is increased, reducing the possibility of sludge flowing out with the water flow. This reduces the difficulty of subsequent wastewater treatment, lowers treatment costs, and improves the effectiveness of the system.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to a multi-flow constructed wetland wastewater treatment system and method. Background Technology

[0002] In today's era, with the continuous development of science and technology, rising economic levels, increasing global population, and improved quality of life, human civilization has also brought a series of problems to our planet. Energy shortages and environmental pollution have become major global challenges, posing a serious threat to human survival and development. Currently, water treatment technologies mainly employ activated sludge processes and chemical treatment methods. However, these methods are relatively expensive, have complex operating conditions, and can generate secondary pollution, making them unsuitable for widespread adoption in low-development countries and impoverished rural areas. The emergence of constructed wetlands offers a solution to this problem.

[0003] Traditional vertical flow subsurface flow constructed wetland ponds will have a single downward flow or a single upward flow in a single pond. After the system has been running for a certain period of time, the water flow channels in the downward flow pond and the upward flow pond will become blocked due to the precipitation of inorganic matter or the deposition of organic matter generated by the metabolism of microorganisms in the wetland, and the wetland substrate will become compacted and silt will occur. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-flow constructed wetland wastewater treatment system and method. The system involves a wastewater discharge assembly installed horizontally on one side of a wastewater pipeline, with a wetland filter tank body. An anti-clogging box with a cleaning function is added to the filter plate body. A propeller blade drives scrapers and cleaning brushes to act on the surface of the filter plate, thereby pushing the metabolites on the surface of the filter plate into the anti-clogging box. This avoids the problem of organic matter generated by the metabolism of microorganisms in the wetland accumulating and clogging the filter plate.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] A multi-flow constructed wetland wastewater treatment system is proposed to improve the above-mentioned problems.

[0007] The application is as follows:

[0008] The system includes a wetland filtration pond, with frames fixedly installed on both sides. A partition plate is fixedly installed on the inner wall of the wetland filtration pond. A drain pipe check valve is fixedly installed on both sides of the bottom surface of one side of the partition plate. An inlet is connected through the upper surface of the drain pipe check valve, and an outlet pipe is connected through the upper surface of the drain pipe check valve. A extraction pipe is fixedly installed at one end of the drain pipe check valve. A sedimentation chamber is provided on the side of the partition plate away from the drain pipe check valve. A shell is fixedly installed inside the sedimentation chamber. A sand filter plate is fixedly installed on the inner wall of the shell. A honeycomb inclined tube is fixedly installed in the middle of the inner wall of the shell. A sedimentation zone is provided between the honeycomb inclined tube and the sand filter plate. A flow guiding component layer is provided on the lower surface of the honeycomb inclined tube.

[0009] The flow guiding component layer includes a main flow plate disposed on the lower surface of the honeycomb inclined tube. Both sides of the main flow plate are provided with side wings. The lower surface of the main flow plate is provided with a secondary flow guiding plate. The lower surface of the shell is provided with an inclined surface. The inclined surface on one side of the shell is in the same plane as the secondary flow guiding plate.

[0010] As a preferred technical solution of this application, the number of main flow plates is several, and they are distributed in a horizontal array inside the shell. One end of the water outlet pipe is placed on the top of the sand filter plate. A flow pipe is connected to the bottom of one side surface of the shell. The same partition plate is provided on one side of the shell, and a membrane bioreactor chamber is provided on one side of the partition plate.

[0011] As a preferred technical solution of this application, a membrane aeration bioreactor is fixedly installed inside the membrane bioreactor chamber. There are two membrane aeration bioreactors, which are distributed in a mirror symmetrical manner. One end of the extraction tube extends into the membrane bioreactor chamber.

[0012] As a preferred technical solution of this application, the wetland filtration tank has a through hole on the side near the sedimentation chamber, and a sewage discharge component is fixedly installed on the inner arc surface of the through hole;

[0013] The sewage discharge assembly includes a mounting ring fixedly installed on the inner arc surface of the through hole, and the inner arc surface of the mounting ring is provided with internal threads.

[0014] As a preferred technical solution of this application, the inner arc surface of the mounting ring is movably connected to the mounting ring via an internal thread, and the outer arc surface of the mounting ring is provided with an external thread, which is threadedly connected to the internal thread.

[0015] As a preferred technical solution of this application, a filter plate is fixedly installed on the inner arc surface of the mounting ring, a plurality of filter holes are opened on the surface of the filter plate, an installation port is opened on one side of the filter plate, and an adapter post is movably connected to the inner arc surface of the installation port.

[0016] As a preferred technical solution of this application, an anti-clogging box is provided on one side of the adapter post, the anti-clogging box has a storage cavity inside, and scraper openings are provided on both sides of the outer arc surface of the anti-clogging box. A cleaning post is fixedly installed on the inner side wall of the scraper opening.

[0017] As a preferred technical solution of this application, the cleaning column is an elastic rubber structure, and a propeller blade is fixedly installed at one end of the adapter column, with the propeller blade placed inside the sedimentation chamber.

[0018] This invention also discloses a method for using a multi-flow constructed wetland wastewater treatment system, comprising the following steps:

[0019] S1. The effluent from the wastewater treatment plant is first connected to the inlet, and the check valve on one side of the drain pipe is opened to allow the wastewater to flow out from the outlet pipe and be integrated into the first water treatment unit. The wastewater can undergo biological reaction in the sedimentation chamber of the upper shell of the first water treatment unit. When the wastewater flows through the shell from top to bottom, an appropriate amount of PAC (polyaluminum chloride) agent is added to the outlet pipe in advance. The flocculent material and phosphates flowing through the wastewater enter the sand filter plate and are intercepted by the sand filter plate. The remaining mud-water mixture in the wastewater can flow into the sedimentation zone in the shell through the honeycomb inclined tube for mud-water separation. After the remaining mud-water mixture in the wastewater has settled sufficiently in the sedimentation zone, the sludge separated in the sedimentation zone can gradually flow downward by its own gravity. The main flow plate flowing downward will separate the sludge to both sides, and the secondary flow plate below it will vertically flow the treated water into the biological reaction chamber.

[0020] S2. After the treated effluent enters the bioreactor chamber, the pretreated wastewater is transported into the bioreactor chamber, which contains biological flora. These flora treat the wastewater by degrading organic matter. While the wastewater is being treated in the membrane aeration bioreactor, water and organisms are separated using microporous membrane filtration technology. These microporous membrane filters can be hollow fiber membranes or flat sheet membranes. Their function is to prevent pollutants from passing through while allowing clean water to pass through. Then, the check valve on the other side is opened, and the treated water is pumped into the surface wetlands and landscape ecological ponds through the extraction pipe.

[0021] S3. When cleaning the sedimentation chamber, water will flow out from the filter plate on one side of the mounting ring. Due to the water pressure, the impact of the water flow will drive the propeller blade connected to one end to rotate. The propeller blade will drive the scraper on one side of the anti-clogging box to stick to the surface of the filter plate. As it rotates, it can push the leaves and other waste on the surface of the filter plate into the anti-clogging box for collection.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] In the scheme of this application:

[0024] 1. The sludge separated in the set sedimentation zone can gradually flow downwards by its own gravity. The main flow plate will separate the sludge to both sides, while the secondary flow plate below it will vertically submerge the treated water. Therefore, by increasing the area of ​​the flow guide component layer blocking the sludge, the sludge is more likely to collide with the main flow plate and the secondary flow plate and fall down, reducing the possibility of the sludge flowing out with the water flow, thereby reducing the difficulty of subsequent sewage treatment, reducing treatment costs, and improving the use effect.

[0025] 2. The sewage discharge assembly is installed horizontally on one side of the sewage pipe through the wetland filter tank body. By adding an anti-clogging box with a clogging function to the filter plate body, the propeller blades drive the scraper and cleaning brush to act on the surface of the filter plate, thereby pushing the metabolites on the surface of the filter plate into the anti-clogging box, thus avoiding the problem of organic matter generated by the metabolism of microorganisms in the wetland on the filter plate being deposited and blocked.

[0026] 3. Wastewater in the installed water pipes will still flow into the shell and fall back into the sedimentation zone to participate in the biochemical reaction again, thereby saving the power consumption of sedimentation tank and sludge return, simplifying the process flow, reducing the footprint of the treatment facility, and thus greatly reducing the investment and operating costs of the treatment facility. Attached Figure Description

[0027] Figure 1 A schematic diagram of a multi-flow constructed wetland wastewater treatment system and method provided in this application;

[0028] Figure 2 A cross-sectional structural schematic diagram of a multi-flow constructed wetland wastewater treatment system and method provided in this application;

[0029] Figure 3 A schematic diagram of the overall framework structure of a multi-flow constructed wetland wastewater treatment system and method provided in this application;

[0030] Figure 4 A schematic diagram of the wastewater sedimentation profile structure of a multi-flow constructed wetland wastewater treatment system and method provided in this application;

[0031] Figure 5 A side view schematic diagram of a multi-flow constructed wetland wastewater treatment system and method provided in this application;

[0032] Figure 6 A schematic diagram of the disassembled structure of the sewage discharge component of a multi-flow constructed wetland sewage treatment system and method provided in this application;

[0033] Figure 7 This is a schematic diagram of the exploded structure of the sewage discharge component of a multi-flow constructed wetland sewage treatment system and method provided in this application.

[0034] The image shows:

[0035] 1. Wetland filtration pond; 2. Frame; 3. Divider plate;

[0036] 4. Check valve for drain pipe; 401. Inlet; 402. Outlet pipe; 403. Extraction pipe;

[0037] 5. Sedimentation chamber; 501. Shell; 502. Sand filter plate; 503. Honeycomb inclined tube; 504. Sedimentation zone;

[0038] 6. Flow guide component layer; 601. Main flow guide plate; 602. Side wing; 603. Secondary flow guide plate;

[0039] 7. Bioreactor; 701. Membrane Aerated Bioreactor;

[0040] 8. Sewage discharge assembly; 801. Mounting ring; 802. Internal thread; 803. Mounting ring; 804. External thread; 805. Filter plate; 806. Mounting port; 807. Adapter post; 808. Anti-clogging box; 809. Storage cavity; 810. Scraper opening; 811. Cleaning post; 812. Propeller blade. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0042] Therefore, the following detailed description of embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely illustrates some embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0043] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] Please see Figures 1 to 7 This invention provides a technical solution: a multi-flow constructed wetland wastewater treatment system and method.

[0047] Example 1:

[0048] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this embodiment proposes a multi-flow constructed wetland wastewater treatment system and method, including a wetland filter tank 1. Frames 2 are fixedly installed on both sides of the wetland filter tank 1. A partition plate 3 is fixedly installed on the inner wall of the wetland filter tank 1. A drain pipe check valve 4 is fixedly installed on both sides of the bottom of one side surface of the partition plate 3. An inlet 401 is connected through the upper surface of the drain pipe check valve 4, and an outlet pipe 402 is connected through the upper surface of the drain pipe check valve 4. A extraction pipe 403 is fixedly installed at one end of the drain pipe check valve 4. A sedimentation chamber 5 is provided on the side of the partition plate 3 away from the drain pipe check valve 4. A shell 50 is fixedly installed inside the sedimentation chamber 5. 1. A sand filter plate 502 is fixedly installed on the inner wall of the shell 501. A honeycomb inclined tube 503 is fixedly installed in the middle of the inner wall of the shell 501. A sedimentation zone 504 is provided between the honeycomb inclined tube 503 and the sand filter plate 502. A flow guiding component layer 6 is provided on the lower surface of the honeycomb inclined tube 503. The flow guiding component layer 6 includes a main flow plate 601 provided on the lower surface of the honeycomb inclined tube 503. Side wings 602 are provided on both sides of the main flow plate 601. A secondary flow guiding plate 603 is provided on the lower surface of the main flow plate 601. An inclined surface is provided on the lower surface of the shell 501. The inclined surface on one side of the shell 501 is in the same plane as the secondary flow guiding plate 603.

[0049] In this embodiment, when sewage flows from top to bottom through the shell 501, an appropriate amount of PAC (polyaluminum chloride) agent is pre-added to the outlet pipe 402. The flocculent material and phosphates flowing through the sewage enter the sand filter plate 502 and are intercepted by the sand filter plate 502. The remaining mud-water mixture in the sewage can flow into the sedimentation zone 504 in the shell 501 through the honeycomb inclined tube 503 for mud-water separation. After the remaining mud-water mixture in the sewage has settled sufficiently in the sedimentation zone 504, the sludge separated in the sedimentation zone 504 can gradually flow downwards by its own gravity. The main flow plate 601 flowing downwards will block the sludge to both sides, and the secondary flow plate 603 below it will vertically submerge the treated water. Therefore, by increasing the area of ​​the flow guide component layer 6 that blocks the sludge, the sludge is more likely to collide with the main flow plate 601 and the secondary flow plate 603 and fall down, reducing the possibility of the sludge flowing out with the water flow, thereby reducing the difficulty of subsequent sewage treatment, reducing treatment costs, and improving the use effect.

[0050] Furthermore, the sewage in the outlet pipe 402 will still flow into the shell 501 and fall back into the sedimentation zone 504 to participate in the biochemical reaction again, thereby saving the power consumption of sedimentation tank and sludge return, simplifying the process flow, reducing the area occupied by the treatment facility, and thus greatly reducing the investment and operating costs of the treatment facility.

[0051] Example 2:

[0052] The solution in Example 1 will be further described below with reference to its specific working method.

[0053] like Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, based on the above method, the number of main flow plates 601 is several, and they are distributed in a horizontal array inside the shell 501. One end of the outlet pipe 402 is placed on the top of the sand filter plate 502. A drainage pipe is connected to the bottom of one side surface of the shell 501. The same partition plate 3 is provided on one side of the shell 501. A membrane bioreactor 7 is provided on one side of the partition plate 3. A membrane aeration bioreactor 701 is fixedly installed inside the membrane bioreactor 7. There are two membrane aeration bioreactors 701, which are distributed in a mirror symmetrical manner. One end of the extraction pipe 403 penetrates into the membrane bioreactor 7.

[0054] In this embodiment, the pretreated wastewater is transported to the bioreactor 7, which contains microbial communities that treat the wastewater by degrading organic matter. While the wastewater is being treated in the membrane aeration bioreactor 701, water and organisms are separated using microporous membrane filtration technology. These microporous membrane filters can be hollow fiber membranes or flat sheet membranes, and their function is to prevent pollutants from passing through while allowing clean water to pass through. Then, the drain check valve 4 on the other side is opened, and the treated water is pumped into the surface wetlands and landscape ecological ponds through the extraction pipe 403.

[0055] The 701 membrane aerated bioreactor is characterized by its extremely high oxygen transfer efficiency, resulting in lower operating costs compared to traditional wastewater treatment processes. Furthermore, the gas-liquid two-phase membrane serves as a boundary, allowing for more flexible and convenient control of the aeration system. Additionally, since it is a bubble-free aeration system, volatile substances in wastewater, such as phenol and toluene, will not enter the atmosphere and cause environmental pollution. Moreover, it will not generate foam due to the presence of surfactants.

[0056] like Figure 1 , Figure 6 and Figure 7 As shown, in a preferred embodiment, based on the above method, a through hole is further provided on the side of the wetland filter tank 1 near the sedimentation chamber 5. A sewage discharge component 8 is fixedly installed on the inner arc surface of the through hole. The sewage discharge component 8 includes a mounting ring 801 fixedly installed on the inner arc surface of the through hole. The inner arc surface of the mounting ring 801 is provided with an internal thread 802. A mounting ring 803 is movably connected to the inner arc surface of the mounting ring 801 through the internal thread 802. The outer arc surface of the mounting ring 803 is provided with an external thread 804. The external thread 804 is threadedly connected to the internal thread 802. A filter plate 8 is fixedly installed on the inner arc surface of the mounting ring 803. 05. The surface of the filter plate 805 is provided with several filter holes. The side of the filter plate 805 is provided with an installation port 806. The inner arc surface of the installation port 806 is movably connected to the adapter post 807. The side of the adapter post 807 is provided with an anti-clogging box 808. The inside of the anti-clogging box 808 is provided with a storage cavity 809. The outer arc surface of the anti-clogging box 808 is provided with scraper openings 810 on both sides. The inner side wall of the scraper opening 810 is fixedly installed with a cleaning post 811. The cleaning post 811 is an elastic rubber structure. One end of the adapter post 807 is fixedly installed with a propeller blade 812. The propeller blade 812 is placed in the sedimentation cavity 5.

[0057] In this embodiment, water flows out from the filter plate 805 on one side of the mounting ring 803. Due to the water pressure, the impact of the water flow will drive the propeller blade 812, which is movably connected at one end, to rotate. The propeller blade 812 drives the scraper opening 810 on one side of the anti-clogging box 808 to adhere to the surface of the filter plate 805. As it rotates, it can push the leaves and other waste on the upper surface of the filter plate 805 into the anti-clogging box for collection.

[0058] By horizontally installing the wetland filter tank 1 in the sewage pipe, and by adding an anti-clogging box 808 with a clogging-clearing function to the filter plate 805, the propeller blades 812 drive the scraper and cleaning brush to act on the surface of the filter plate 805. This pushes the metabolites on the upper surface of the filter plate 805 into the anti-clogging box, thereby avoiding the problem of organic matter generated by the metabolism of microorganisms in the wetland accumulating and clogging the filter plate.

[0059] Example 3:

[0060] The solutions in Embodiments 1 and 2 will be further described below with reference to their specific working methods.

[0061] The following, in conjunction with the above, provides a multi-flow constructed wetland wastewater treatment system and method, specifically including the following steps:

[0062] S1. The effluent from the wastewater treatment plant is first connected to the inlet 401, and the check valve 4 on one side of the drain pipe is opened, allowing the wastewater to flow out from the outlet pipe 402. When integrated into the first water treatment unit, the wastewater can undergo biological reaction inside the sedimentation chamber 5 located in the upper shell 501 of the first water treatment unit. As the wastewater flows from top to bottom through the shell 501, an appropriate amount of PAC (polyaluminum chloride) agent is pre-added to the outlet pipe 402. The flocculent material and phosphates flowing through the wastewater enter the sand filter plate 502 together. The wastewater is trapped by the sand filter plate 502, while the remaining mud-water mixture in the wastewater can flow into the sedimentation zone 504 in the shell 501 through the honeycomb inclined tube 503 for mud-water separation. After the remaining mud-water mixture in the wastewater has settled sufficiently in the sedimentation zone 504, the sludge separated in the sedimentation zone 504 can gradually flow downward by its own gravity. The main flow plate 601 flowing downward will separate the sludge to both sides, while the secondary flow plate 603 below it will vertically flow the treated water into the biological reaction chamber 7.

[0063] S2. After the treated effluent enters the biological reaction chamber 7, the pretreated wastewater is transported into the biological reaction chamber 7, which contains biological microorganisms. These microorganisms treat the wastewater by degrading organic matter. While the wastewater is being treated in the membrane aeration bioreactor 701, water and organisms are separated using microporous membrane filtration technology. These microporous membrane filters can be hollow fiber membranes or flat sheet membranes. Their function is to prevent pollutants from passing through while allowing clean water to pass through. Then, the drain pipe check valve 4 on the other side is opened, and the treated water is pumped into the surface wetland and landscape ecological pond through the extraction pipe 403.

[0064] S3. When cleaning the sedimentation chamber 5, water will be discharged from the filter plate 805 on one side of the mounting ring 803. Due to the water pressure, the impact of the water flow will drive the propeller blade 812 connected at one end to rotate. The propeller blade 812 will drive the scraper opening 810 on one side of the anti-clogging box 808 to stick to the surface of the filter plate 805. With the rotation, the leaves and other waste on the upper surface of the filter plate 805 can be pushed into the anti-clogging box 808 for collection.

[0065] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described herein. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present invention, as well as all technical solutions and improvements that do not depart from the spirit and scope of the invention, are covered within the scope of the claims of the present invention.

Claims

1. A multi-flow constructed wetland wastewater treatment system, characterized in that, The system includes a wetland filter tank (1), with frames (2) fixedly installed on both sides of the wetland filter tank (1). A partition plate (3) is fixedly installed on the inner wall of the wetland filter tank (1). A drain pipe check valve (4) is fixedly installed on both sides of the bottom of one side surface of the partition plate (3). An inlet (401) is connected through the upper surface of the drain pipe check valve (4). An outlet pipe (402) is connected through the upper surface of the drain pipe check valve (4). A extraction pipe (403) is fixedly installed at one end of the drain pipe check valve (4). The separator (3) has a sedimentation chamber (5) on the side away from the drain pipe check valve (4). A housing (501) is fixedly installed inside the sedimentation chamber (5). A sand filter plate (502) is fixedly installed on the inner wall of the housing (501). A honeycomb inclined tube (503) is fixedly installed in the middle of the inner wall of the housing (501). A sedimentation zone (504) is provided between the honeycomb inclined tube (503) and the sand filter plate (502). A flow guiding component layer (6) is provided on the lower surface of the honeycomb inclined tube (503). The flow guiding component layer (6) includes a main flow plate (601) disposed on the lower surface of the honeycomb inclined tube (503), with side wings (602) on both sides of the main flow plate (601), a secondary flow guiding plate (603) disposed on the lower surface of the main flow plate (601), and a slope disposed on the lower surface of the housing (501), with the slope on one side of the housing (501) and the secondary flow guiding plate (603) in the same plane.

2. The multi-flow constructed wetland wastewater treatment system according to claim 1, characterized in that, The number of main flow plates (601) is several, and they are distributed in a horizontal array inside the shell (501). One end of the water outlet pipe (402) is placed on the top of the sand filter plate (502). A drainage pipe is connected to the bottom of one side surface of the shell (501). The same partition plate (3) is provided on one side of the shell (501). A membrane bioreactor chamber (7) is provided on one side of the partition plate (3).

3. The multi-flow constructed wetland wastewater treatment system according to claim 2, characterized in that, The membrane bioreactor (701) is fixedly installed inside the membrane bioreactor chamber (7). There are two membrane bioreactors (701) and they are distributed in a mirror symmetrical manner. One end of the extraction tube (403) extends into the membrane bioreactor chamber (7).

4. The multi-flow constructed wetland wastewater treatment system according to claim 3, characterized in that, The wetland filtration tank (1) has a through hole on the side near the sedimentation chamber (5), and a sewage discharge component (8) is fixedly installed on the inner arc surface of the through hole. The sewage discharge assembly (8) includes a mounting ring (801) fixedly installed on the inner arc surface of the through hole, and the inner arc surface of the mounting ring (801) is provided with an internal thread (802).

5. The multi-flow constructed wetland wastewater treatment system according to claim 4, characterized in that, The inner arc surface of the mounting ring (801) is movably connected to the mounting ring (803) via the internal thread (802). The outer arc surface of the mounting ring (803) is provided with an external thread (804), and the external thread (804) is threadedly connected to the internal thread (802).

6. The multi-flow constructed wetland wastewater treatment system according to claim 5, characterized in that, The inner arc surface of the mounting ring (803) is fixedly mounted with a filter plate (805). The surface of the filter plate (805) is provided with a plurality of filter holes. An installation port (806) is provided on one side of the filter plate (805). An adapter post (807) is movably connected to the inner arc surface of the installation port (806).

7. The multi-flow constructed wetland wastewater treatment system according to claim 6, characterized in that, The adapter post (807) has an anti-clogging box (808) on one side, and the anti-clogging box (808) has a storage cavity (809) inside. The anti-clogging box (808) has scraper openings (810) on both sides of its outer arc surface, and a cleaning post (811) is fixedly installed on the inner side wall of the scraper opening (810).

8. A multi-flow constructed wetland wastewater treatment system according to claim 7, characterized in that, The cleaning column (811) is an elastic rubber structure, and a propeller blade (812) is fixedly installed at one end of the adapter column (807). The propeller blade (812) is placed in the sedimentation chamber (5).

9. A method of using a multi-flow constructed wetland wastewater treatment system, characterized in that, The multi-flow constructed wetland wastewater treatment system according to any one of claims 1-8 includes the following steps: S1. The wastewater from the wastewater treatment plant is first connected to the inlet (401), and the drain valve (4) on one side is opened so that the wastewater flows out from the outlet pipe (402). When the wastewater is integrated into the first water treatment unit, the wastewater can undergo biological reaction in the sedimentation chamber (5) where the upper shell (501) of the first water treatment unit is located. When the wastewater flows from top to bottom through the shell (501), an appropriate amount of PAC polyaluminum chloride agent is put into the outlet pipe (402) in advance. The flocculents and phosphates that flow through the wastewater enter the sand filter plate (502). The wastewater is trapped by the sand filter plate (502), while the remaining mud-water mixture in the wastewater can flow into the sedimentation zone (504) in the shell (501) through the honeycomb inclined tube (503) for mud-water separation. After the remaining mud-water mixture in the wastewater has settled sufficiently in the sedimentation zone (504), the sludge separated in the sedimentation zone (504) can gradually flow downward by its own gravity. The main flow plate (601) flowing downward will separate the sludge to both sides, and the secondary flow plate (603) below it will vertically flow the treated water into the biological reaction chamber (7). S2. After the treated effluent enters the biological reaction chamber (7), the pretreated sewage is transported to the biological reaction chamber (7), which contains biological microorganisms. These microorganisms treat sewage by degrading organic matter. While sewage is being treated in the membrane aeration bioreactor (701), water and organisms are separated by microporous membrane filtration technology. These microporous membrane filters are either hollow fiber membranes or flat sheet membranes. Then, the drain pipe check valve (4) on the other side is opened, and the treated water is pumped to the surface wetland and landscape ecological pond through the extraction pipe (403). S3. When cleaning the sedimentation chamber (5), water will be discharged from the filter plate (805) on one side of the mounting ring (803). Due to the water pressure, the impact of the water flow will drive the propeller blade (812) connected at one end to rotate. The propeller blade (812) will drive the scraper (810) on one side of the anti-clogging box (808) to stick to the surface of the filter plate (805). With the rotation, the leaves and other waste on the upper surface of the filter plate (805) can be pushed into the anti-clogging box (808) for collection.

Images