Multi-level siphon water outlet micro-electric field reinforced type artificial wetland

Abstract

The application discloses a kind of micro electric field reinforced artificial wetlands of multiple liquid level siphon water outlet, it is related to artificial wetland technical field, including artificial wetland, its bottom is laid with water collector pipe;Water collector, one side with water collector pipe communication;Siphon pipe, one end extends to the inside of water collector, the height of other end is lower than the height of water collector;Liquid level sensor, for obtaining water level information in water collector;And solenoid valve, it is set on siphon pipe.The application is realized by being equipped with water collector, siphon pipe, liquid level sensor and solenoid valve, and the automatic control of artificial wetland water outlet liquid level and periodic siphon drainage.Coupling sealing mechanism and sealing piece, can automatically seal water collector and start siphon at high liquid level, not only discharge water after purification, but also can suck external air into artificial wetland substrate layer inside after siphon late period, realize the oxygen supply of substrate " breathing ", effectively improve dissolved oxygen distribution, improve nitrification and denitrification efficiency.

Description

Technical Field

[0001] This invention relates to the field of constructed wetland technology, and in particular to a micro-electric field enhanced constructed wetland with multi-level siphon water discharge. Background Technology

[0002] Constructed wetlands, as a typical ecological treatment technology, rely on a substrate-plant-microorganism composite system to achieve the synergistic removal of pollutants through multiple processes such as physical adsorption, plant absorption, and microbial metabolism. Due to their advantages such as low operating costs, simple maintenance, and eco-friendliness, they have been widely used in fields such as rural domestic sewage, advanced treatment of effluent, and non-point source pollution control.

[0003] However, existing constructed wetland systems still face some problems in actual operation: Most constructed wetlands operate under a single continuous flow or intermittent flow mode, with relatively simple hydraulic conditions, making it difficult to form a stable dissolved oxygen gradient. This results in uneven distribution of aerobic and anoxic zones within the system, which in turn limits the coupling efficiency of the nitrification-denitrification process and affects the removal of pollutants such as total nitrogen.

[0004] Traditional wetlands rely mainly on natural diffusion and microbial metabolism for mass and electron transfer processes. The low efficiency of electron flow within the system makes it difficult to effectively drive the transformation of recalcitrant organic matter, thus limiting the improvement of the overall treatment performance of the system. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a micro-electric field enhanced artificial wetland with multi-level siphon water discharge.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A micro-electric field-enhanced constructed wetland with multi-level siphon water discharge includes: Artificial wetlands have water collection pipes laid at their bottom; A water collection tank, one side of which is connected to a water collection pipe; A siphon tube, one end of which extends into the interior of the water collection tank, and the other end of which is lower than the height of the water collection pipe; A liquid level sensor is used to acquire liquid level information in a water collection tank. And a solenoid valve, which is installed on the siphon pipe, is used to control the siphon pipe to siphon out the water inside the collection tank.

[0007] Furthermore, it also includes a sealing mechanism and a sealing element; The sealing mechanism is located at the top of the water collection tank; The siphon pipe is equipped with a seal and a float at one end inside the water collection tank so that the seal rises and falls with the liquid level. When the liquid level inside the collection tank rises to its highest point, the sealing element connects to the sealing mechanism to seal the collection tank. The solenoid valve opens the siphon pipe to discharge the water inside the collection tank, thereby drawing water from inside the constructed wetland and drawing outside air into the substrate layer of the constructed wetland.

[0008] Furthermore, the siphon includes a bend and a telescopic pipe. The telescopic pipe is vertically installed inside the water collection tank. The upper end of the telescopic pipe is connected to one end of the siphon, and the lower end is provided with a suction pipe. A float is installed outside the suction pipe so that the lower suction port of the suction pipe is submerged below the water surface.

[0009] Furthermore, the sealing mechanism includes a venting cylinder, the bottom of which is provided with a groove, and the inner wall of the groove is provided with air holes; The seal includes a plug that can be inserted into a groove to block the vent.

[0010] Furthermore, a first magnet is provided at the top of the groove of the vent, and a second magnet is provided at the top of the plug; The sealing element also includes a fixing element, which is fixed to the lower end of the siphon pipe located inside the water collection tank. The fixing element is provided with a T-shaped rod, and the plug is provided with a T-shaped through hole. The T-shaped rod is located inside the T-shaped through hole so that the plug can be vertically moved on the T-shaped rod.

[0011] Furthermore, the top of the groove in the vent is conical, and the shape of the plug is adapted to fit the groove so that the plug can be embedded inside the groove.

[0012] Furthermore, a guide rod is vertically installed inside the water collection tank, and a telescopic pipe is sleeved on the outside of the guide rod so that the telescopic pipe can extend and retract vertically along the guide rod.

[0013] Furthermore, a sedimentation collection box is provided at the bottom of the water collection tank, and the lower end of the guide rod is connected to the sedimentation collection box.

[0014] Furthermore, the water collection tank includes a water storage tank and a top cover. The water storage tank is buried underground, and the top cover is set on top of the water storage tank for sealing the water storage tank. The sealing mechanism is set on the top cover.

[0015] Furthermore, it also includes a conductive rod and a power source. The conductive rod is set on the upper part of the substrate layer of the artificial wetland, and the positive and negative terminals of the power source are connected to the conductive rod and the water collection pipe, respectively. The water collection pipe is made of conductive material.

[0016] The beneficial effects of this invention are as follows: In this invention, a micro-electric field-enhanced constructed wetland with multi-level siphon effluent achieves automatic control of the wetland's effluent level and periodic siphon drainage by incorporating a collection tank, siphon pipe, level sensor, and solenoid valve. Combined with a sealing mechanism and seals, the collection tank can be automatically sealed and the siphon activated at high levels. This not only discharges the purified water but also draws external air into the wetland's substrate layer during the later stages of siphoning, enabling the substrate to "breathe" and supply oxygen, effectively improving dissolved oxygen distribution and increasing nitrification and denitrification efficiency. Furthermore, the system can be dynamically adjusted based on fluctuations in influent water quality, regulating the hydraulic retention time and enhancing long-term system stability.

[0017] Meanwhile, by installing conductive rods and conductive water collection pipes at the top and bottom of the constructed wetland substrate layer and applying a micro-electric field, pollutants in the water can be efficiently removed, and the desorption of organic matter and particulate matter adsorbed by the substrate layer can be promoted, achieving in-situ regeneration of the substrate layer, extending the wetland's operating cycle, and reducing maintenance costs. This device has a compact structure and a high degree of automation, significantly improving the treatment effect and operational stability of constructed wetlands. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of the micro-electric field enhanced constructed wetland with multi-level siphon water discharge proposed in this invention. Figure 2 This is a schematic cross-sectional view of the water collection tank and siphon pipe of the multi-level siphon water discharge micro-electric field enhanced constructed wetland proposed in this invention. Figure 3 This is a schematic cross-sectional view of the water collection tank of the multi-level siphon water discharge micro-electric field enhanced constructed wetland proposed in this invention at the highest liquid level. Figure 4 This is a three-dimensional structural diagram of the sealing mechanism and sealing element of the multi-level siphon water discharge micro-electric field enhanced constructed wetland proposed in this invention; Figure 5 This is a three-dimensional structural diagram of the vent and sealing components of the multi-level siphon-out micro-electric field enhanced constructed wetland proposed in this invention. Figure 6 This is a schematic diagram of the three-dimensional structure of multiple water collection tanks in the micro-electric field enhanced constructed wetland with multi-level siphon water discharge proposed in this invention. Figure 7 This is a comparison diagram showing the effect of the multi-level siphon water discharge micro-electric field enhanced constructed wetland proposed in this invention on the removal of levofloxacin with a traditional direct-flow constructed wetland.

[0019] In the diagram: 1 Constructed wetland, 2 Collection tank, 201 Water storage tank, 202 Top cover, 3 Siphon pipe, 301 Bend, 302 Telescopic pipe, 303 Float, 4 Water collection pipe, 401 Connecting pipe, 402 Inlet pipe, 5 Sealing mechanism, 501 Vent, 502 First magnet, 503 Air hole, 504 Protective net, 6 Sealing component, 601 Plug, 602 Second magnet, 603 Fixing component, 7 Guide rod, 8 Sedimentation collection box, 9 Solenoid valve, 10 Conductive rod. Detailed Implementation

[0020] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0021] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0022] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent 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. Therefore, they should not be construed as limitations on this patent.

[0023] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0024] Reference Figure 1-6 A micro-electric field enhanced constructed wetland with multi-level siphon water discharge is applied to constructed wetland systems to improve the purification efficiency of constructed wetlands and realize substrate layer regeneration.

[0025] The multi-level siphon water discharge micro-electric field enhanced constructed wetland includes: constructed wetland 1, water collection tank 2, siphon pipe 3, liquid level sensor and solenoid valve 9.

[0026] The constructed wetland 1 consists of a top planting layer and a bottom substrate layer. The substrate layer can be made of materials such as expanded clay, sand, or activated carbon. An inlet pipe is installed on one side of the constructed wetland 1 to introduce water to be purified into the constructed wetland 1.

[0027] The water collection tank 2 is located on one side of the artificial wetland 1 and is connected to the artificial wetland 1 through the water collection pipe 4.

[0028] The water collection pipe 4 includes a connecting pipe 401 and multiple inlet pipes 402. The connecting pipe 401 is laid horizontally at the bottom of the substrate layer of the constructed wetland 1, with one end connected to the water collection tank 2. Each inlet pipe 402 is positioned on the same horizontal plane as the connecting pipe 401 and is spaced apart. Each inlet pipe 402 is perpendicular to the connecting pipe 401, with one end connected to the connecting pipe 401, and its outer wall has multiple inlet holes. The purified water is collected into the water collection tank 2 through the inlet holes, the inlet pipes 402, and the connecting pipes 401.

[0029] In some embodiments, the multi-level siphon-effect micro-electric field enhanced constructed wetland further includes a conductive rod 10 and a power source. The conductive rod 10 is disposed on the upper part of the substrate layer of the constructed wetland 1, and the positive and negative terminals of the power source are electrically connected to the conductive rod 10 and the water collection pipe 4, respectively. The water collection pipe 4 is made of conductive material. By generating a micro-electric field between the conductive rod 10 and the water collection pipe 4 through the power source, pollutants in the water can be efficiently removed, and organic matter and particulate matter adsorbed on the surface of the substrate layer can be desorbed, realizing in-situ regeneration of the substrate layer and reducing resource waste.

[0030] The siphon pipe 3 includes a bend 301 and a telescopic pipe 302. The telescopic pipe 302 is vertically installed inside the water collection tank 2, with its upper end connected to the bend 301 and its lower end connected to a suction pipe. A float 303 is provided outside the suction pipe. The outlet end of the bend 301 is located outside the water collection tank 2, and its height is lower than that of the water collection pipe 4. Through siphon action, water in the water collection tank 2 is discharged sequentially through the suction pipe, the telescopic pipe 302, and the bend 301. The float 303 allows the suction pipe to rise and fall with the water level in the water collection tank 2, ensuring that the suction inlet at the lower end of the suction pipe is always below the water surface, thereby ensuring the stability of the siphon effect.

[0031] It should be noted that when the siphon pipe 3 is installed and used for the first time, a water pump can be installed at the end of the siphon pipe 3 to draw water from the water collection tank 2 into the bend pipe 301 and expel the air inside the siphon pipe 3, thus achieving the conditions for siphon action. This makes it convenient for the siphon pipe 3 to automatically drain water in the future by relying on the siphon action.

[0032] Furthermore, the height of the bend 301 in the diagram is only for illustrative purposes and does not specify the actual height of the bend 301. In actual design, the maximum height of the bend 301 can be lower than the maximum water level of the constructed wetland. Through the principle of communicating vessels, water can automatically fill the bend 301, expelling the air inside and achieving the conditions for a siphon effect.

[0033] The telescopic pipe 302 can be made of corrugated plastic to achieve its telescopic function. When the liquid level in the collection tank 2 rises, the float 303 drives the suction pipe to rise, and the telescopic pipe 302 retracts; when the liquid level drops, the suction pipe descends with the liquid level under the action of gravity, and the telescopic pipe 302 extends. In other embodiments, the telescopic pipe 302 can also be made of flexible hose, as long as it can achieve communication between the suction pipe and the bend 301 without affecting the raising and lowering of the suction pipe.

[0034] A liquid level sensor is installed inside the water collection tank 2 to obtain liquid level information. A solenoid valve 9 is installed on the bend 301. Based on the liquid level information detected by the liquid level sensor, when the liquid level in the water collection tank 2 rises to a preset high level, the solenoid valve 9 opens the bend 301, initiating a siphon effect to drain water from the water collection tank 2; when the liquid level drops to a preset low level, the solenoid valve 9 closes the bend 301, and the water collection tank 2 is refilled with water.

[0035] During the water storage process in the collection tank 2, the water purified by the constructed wetland 1 continuously enters the collection tank 2 through the collection pipe 4. The collection tank 2 repeatedly performs water storage and drainage operations, thereby ensuring that the constructed wetland 1 continuously and efficiently purifies the wastewater.

[0036] In some embodiments, a control module (not shown) is also included. The control module is electrically connected to the liquid level sensor and the solenoid valve 9. The liquid level sensor transmits liquid level information to the control module, which then controls the opening and closing of the solenoid valve 9 accordingly.

[0037] In some embodiments, the multi-level siphon-driven micro-electric field enhanced constructed wetland further includes a sealing mechanism 5 and a sealing element 6. The sealing mechanism 5 is disposed at the top of the water collection tank 2. The sealing element 6 is disposed at one end of the siphon pipe 3 located inside the water collection tank 2, and a float 303 is installed thereon, so that the sealing element 6 rises and falls with the water level.

[0038] When the liquid level in the collection tank 2 rises to its maximum level, the seal 6 engages with the sealing mechanism 5, sealing the collection tank 2. At this time, the solenoid valve 9 opens the siphon pipe 3, and the siphon effect drains the water from the collection tank 2. Because the top of the collection tank 2 is sealed, its internal liquid level will not drop immediately, but will continue to draw purified water from the constructed wetland 1 until the water in the constructed wetland 1 is basically drained. Afterward, the siphon effect continues to draw in external air, allowing air to enter the substrate layer of the constructed wetland 1, and eventually penetrate the substrate layer and enter the collection tank 2 through the collection pipe 4. When air enters the collection tank 2, the liquid level in the collection tank 2 drops, the seal 6 disengages from the sealing mechanism 5, the collection tank 2 returns to a ventilated state, and the internal water can continue to be drained.

[0039] Through the above process, after the constructed wetland 1 has been running for a certain period of time, the liquid level in the collection tank 2 can be periodically raised to the highest level, and air can be introduced into the matrix layer of the constructed wetland 1 to achieve periodic "breathing" and oxygen supply to the matrix layer, thereby effectively preventing the matrix layer from becoming blocked.

[0040] In some embodiments, the water collection tank 2 and its connected water collection pipe 4 and siphon pipe 3 can be configured as multiple groups, with each group arranged at intervals along the transverse direction of the constructed wetland 1, so as to ensure that the substrate layer in each area of ​​the constructed wetland 1 can achieve periodic air absorption.

[0041] In some embodiments, the water collection tank 2 includes a water storage tank 201 and a top cover 202. The water storage tank 201 is buried below ground level, and the top cover 202 is disposed on the top of the water storage tank 201 to achieve a seal for the water storage tank 201.

[0042] In some embodiments, the sealing mechanism 5 includes a vent 501, and the sealing element 6 includes a plug 601. A mounting hole is provided on the top cover 202, and the vent 501 is disposed at this mounting hole. The top of the vent 501 is located outside the water collection tank 2 to connect with the outside atmosphere, and a protective net 504 is also provided on its top to prevent foreign objects from falling into the vent 501 and causing blockage.

[0043] The bottom of the vent 501 has a groove, and the inner wall of the groove has an air hole 503, which communicates with the outside of the water collection tank 2 through the vent 501. A plug 601 is mounted on the suction pipe and can rise and fall with the liquid level in the water collection tank 2. When the plug 601 rises to its highest position with the liquid level, it can be inserted into the groove to seal the air hole 503, thereby achieving a seal in the water collection tank 2.

[0044] In some embodiments, a first magnet 502 is provided at the top of the groove of the vent 501, and a second magnet 602 is provided at the top of the plug 601. When the upper part of the plug 601 is inserted into the groove, the magnetic attraction between the first magnet 502 and the second magnet 602 firmly holds the plug 601 in the groove, achieving a reliable seal. Furthermore, when the plug 601 rises close to the groove, the magnetic attraction can directly draw the plug 601 upwards and insert it into the groove, avoiding poor sealing due to liquid level fluctuations.

[0045] The sealing element 6 also includes a fixing element 603. The fixing element 603 is fixed to the suction pipe. The fixing element 603 is provided with a T-shaped rod, and the plug 601 is provided with a T-shaped through hole. The T-shaped rod passes through the T-shaped through hole, so that the plug 601 can move relative to the T-shaped rod in the vertical direction, thereby facilitating the magnetic attraction to suck the plug 601 into the groove to achieve sealing.

[0046] In some embodiments, the top of the groove of the vent 501 is conical, and the shape of the plug 601 matches the groove so that the plug 601 can be accurately and smoothly embedded into the groove during its ascent. An air hole 503 is provided on the sidewall of the lower part of the groove. When the plug 601 is embedded in the groove, the air hole 503 faces laterally toward the outer wall of the plug 601, which can prevent external air pressure from pushing the plug 601 downwards, further improving the sealing effect.

[0047] In some embodiments, a guide rod 7 is vertically arranged inside the water collection tank 2, and a telescopic tube 302 is sleeved on the outside of the guide rod 7. A guide ring is provided inside the suction tube, and the guide ring is sleeved on the guide rod 7, so that the telescopic tube 302 extends and retracts vertically along the guide rod 7, ensuring that the suction tube drives the plug 601 to move vertically and accurately insert into the groove of the ventilator 501.

[0048] In some embodiments, a sedimentation collection box 8 is provided at the bottom of the water collection tank 2, and the lower end of the guide rod 7 is connected to the sedimentation collection box 8. During the water storage process, the water collection tank 2 can undergo sedimentation treatment, causing large particles to settle in the sedimentation collection box 8. After long-term sedimentation, the top cover 202 of the water storage tank 201 can be opened, and the sedimentation collection box 8 can be lifted upwards and cleaned using the guide rod 7.

[0049] The working principle of this multi-level siphon-type constructed wetland with enhanced electric field: During operation, water purified by the constructed wetland 1 is collected through the collection pipe 4 laid at its bottom and flows into the collection tank 2. A level sensor installed in the collection tank 2 monitors the water level in real time. When the water level rises to the set level, the control module controls the solenoid valve 9 to open the siphon pipe 3, using siphon action to pump water out of the collection tank 2. When the water level drops to a low level, the solenoid valve 9 closes, the collection tank 2 is refilled, and the next cycle begins.

[0050] When air needs to be introduced into the substrate layer of the constructed wetland 1, the liquid level in the collection tank 2 rises to the set high level. The sealing element 6, driven by the float 303, rises with the liquid level and engages with the sealing mechanism 5 at the top of the collection tank 2, sealing the collection tank 2. At this time, the solenoid valve 9 opens, and the siphon pipe 3 begins to siphon out water. Because the top of the collection tank 2 is sealed, the liquid level in the collection tank 2 does not drop during the siphoning process; instead, purified water is continuously drawn from the constructed wetland 1 until the water inside the constructed wetland 1 is essentially drained. Afterward, the siphoning continues to draw in external air, allowing air to enter the collection tank 2 through the substrate layer of the constructed wetland 1, until the air penetrates the substrate layer and enters the collection tank 2 through the collection pipe 4, thus achieving periodic "air intake" of the substrate layer and preventing blockage.

[0051] When air enters the water collection tank 2, the liquid level in the water collection tank 2 drops, the seal 6 disengages from the sealing mechanism 5, the water collection tank 2 resumes ventilation, and the water inside can continue to be discharged. When the liquid level drops to the low level, the solenoid valve 9 closes, the water collection tank 2 is refilled with water, and the next cycle begins.

[0052] In addition, the present invention can also form a micro electric field in the matrix layer through the water collection pipe 4, the conductive rod 10 and the power source, thereby promoting the removal of pollutants and the regeneration of the matrix layer.

[0053] In some embodiments, refer to Figure 7 This study constructs both traditional direct-flow constructed wetlands and micro-electric field-enhanced constructed wetlands with multi-level siphon drainage (hereinafter referred to as siphon constructed wetlands). The drainage function in siphon constructed wetlands is achieved through siphon action.

[0054] The average influent levofloxacin (LVFX) concentration throughout the entire operating cycle was 502.75 μg / L. Both the direct-flow and siphon-type constructed wetlands showed a pattern of initial increase followed by a decrease, eventually reaching a stable state in the effluent. On day 6 of operation, the effluent concentrations for each unit were 54.38 ± 3.12 μg / L and 43.44 ± 1.23 μg / L, respectively. A relatively stable state was reached after 18 days of operation. This was mainly because the microorganisms were in an adaptation phase after the addition of antibiotics, and adsorption became the primary removal pathway for LVFX. The removal rate began to increase from the third sampling (day 9 after LVFX addition) and gradually stabilized, indicating that the microorganisms played a role and became the main factor in LVFX removal.

[0055] In summary, the average LVFX concentrations in the effluent from each device were 22.74±10.18 μg / L and 9.89±10.47 μg / L, respectively. The removal rates were: siphon-type constructed wetland (97.04±2.08%) > direct-flow constructed wetland (94.50±1.98%). The siphon-type constructed wetland showed significantly better LVFX removal than the direct-flow constructed wetland, with an effluent LVFX concentration 12.87 μg / L lower and a removal rate 2.54% higher.

[0056] Furthermore, when the influent LVFX concentration suddenly increased during operation, the effluent from the direct-flow constructed wetland fluctuated, while the effluent from the siphon-type constructed wetland remained stable. This indicates that the siphon-type constructed wetland has a stronger ability to resist shocks.

[0057] Siphon-type constructed wetlands introduce oxygen into the cathode region via siphoning, altering the dissolved oxygen concentration and thus changing the redox potential, which also affects conductivity. In traditional constructed wetlands, the low dissolved oxygen concentration within the bed makes it difficult to meet the needs of aerobic microorganisms when carbon sources are insufficient, resulting in low pollutant removal efficiency. Siphon-type constructed wetlands, through periodic "air intake," provide alternating anoxic / aerobic reaction conditions, effectively improving the oxygen transfer rate.

[0058] In this embodiment, the constructed wetland substrate layer is periodically "absorbed" to change the siphon liquid level, so that the bottom is in the anaerobic zone and the area above the siphon is in a periodic drainage / water storage state. The anaerobic / aerobic process alternates, thereby improving the removal efficiency of pollutants.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A micro-electric field-enhanced constructed wetland with multi-level siphon water discharge, characterized in that, include: An artificial wetland (1) has a water collection pipe (4) laid at its bottom. A water collection tank (2) is connected to the water collection pipe (4) on one side; The siphon (3) extends one end into the interior of the water collection tank (2) and the other end is lower than the height of the water collection pipe (4); A liquid level sensor is used to acquire liquid level information in the water collection tank (2); And a solenoid valve (9), which is installed on the siphon pipe (3) to control the siphon pipe (3) to siphon out the water inside the water collection tank (2).

2. The micro-electric field enhanced constructed wetland with multi-level siphon water discharge as described in claim 1, characterized in that: It also includes a sealing mechanism (5) and a sealing element (6); The sealing mechanism (5) is located on the top of the water collection tank (2); The siphon tube (3) is provided with a sealing element (6) and a float (303) at one end inside the water collection tank (2) so that the sealing element (6) rises and falls with the liquid level; When the liquid level inside the water collection tank (2) rises to its highest level, the sealing element (6) connects to the sealing mechanism (5) to seal the water collection tank (2), and the solenoid valve (9) opens the siphon pipe (3) to discharge the water inside the water collection tank (2) to extract the water inside the artificial wetland (1) and extract external air into the matrix layer of the artificial wetland (1).

3. The micro-electric field enhanced constructed wetland with multi-level siphon water discharge as described in claim 2, characterized in that: The siphon (3) includes a bend (301) and a telescopic pipe (302). The telescopic pipe (302) is vertically installed inside the water collection tank (2). The upper end of the telescopic pipe (302) is connected to one end of the siphon (3), and the lower end is provided with a suction pipe. The float (303) is installed outside the suction pipe so that the lower end of the suction pipe is submerged below the water surface.

4. The micro-electric field enhanced constructed wetland with multi-level siphon water discharge according to claim 2, characterized in that: The sealing mechanism (5) includes a vent (501), the bottom of which is provided with a groove, and the inner wall of the groove is provided with air holes (503). The seal (6) includes a plug (601) that can be inserted into a groove to block the vent (503).

5. The micro-electric field enhanced constructed wetland with multi-level siphon water discharge according to claim 4, characterized in that: The top of the groove of the vent (501) is provided with a first magnet (502), and the top of the plug (601) is provided with a second magnet (602). The sealing element (6) also includes a fixing element (603), which is fixed to the lower end of the siphon pipe (3) located inside the water collection tank (2). The fixing element (603) is provided with a T-shaped rod, and the plug (601) is provided with a T-shaped through hole. The T-shaped rod is located inside the T-shaped through hole so that the plug (601) can be vertically displaced on the T-shaped rod.

6. The micro-electric field enhanced constructed wetland with multi-level siphon water discharge according to claim 4, characterized in that: The top of the groove of the vent (501) is conical, and the shape of the plug (601) is adapted to the groove so that the plug (601) can be embedded inside the groove.

7. The micro-electric field enhanced constructed wetland with multi-level siphon water discharge according to claim 4, characterized in that: The water collection tank (2) is vertically equipped with a guide rod (7), and the telescopic tube (302) is sleeved on the outside of the guide rod (7) so that the telescopic tube (302) can extend and retract vertically along the guide rod (7).

8. The micro-electric field enhanced constructed wetland with multi-level siphon water discharge according to claim 7, characterized in that: The bottom of the water collection tank (2) is provided with a sedimentation collection box (8), and the lower end of the guide rod (7) is connected to the sedimentation collection box (8).

9. The micro-electric field enhanced constructed wetland with multi-level siphon water discharge according to claim 1, characterized in that: The water collection tank (2) includes a water storage tank (201) and a top cover (202). The water storage tank (201) is buried below the ground. The top cover (202) is set on the top of the water storage tank (201) for sealing the water storage tank (201). The sealing mechanism (5) is set on the top cover (202).

10. A micro-electric field-enhanced constructed wetland with multi-level siphon water discharge according to claim 1, characterized in that: It also includes a conductive rod (10) and a power source. The conductive rod (10) is disposed on the upper part of the substrate layer of the artificial wetland (1), and the positive and negative poles of the power source are connected to the conductive rod (10) and the water collection pipe (4) respectively. The water collection pipe (4) is made of conductive material.

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