Horizontal subsurface flow wetland, system and anti-blocking method

Abstract

The invention relates to the technical field of sewage treatment, and discloses a horizontal subsurface flow wetland, system and anti-clogging method.The horizontal subsurface flow wetland comprises a planting layer, a purifying layer, a stabilizing layer and partition plates, the planting layer, the purifying layer and the stabilizing layer are sequentially arranged from top to bottom, and the multiple partition plates are detachably arranged in the planting layer, the purifying layer and the stabilizing layer in the water flow direction; a plurality of water passing holes are formed in the partition plates, and the water passing holes in the adjacent partition plates are formed in a staggered mode in the height direction. The flow state of water flow in the horizontal subsurface flow wetland in the on-way direction can achieve changeable and reciprocating flow states such as low-medium-high, high-medium-low and medium-medium-medium, the wave type hydrodynamic flow state in the horizontal subsurface flow wetland unit is constructed, the controllable hydrodynamic flow state is beneficial to dynamically balancing the pollution load in the horizontal subsurface flow wetland, the overall blocking trend is reduced, and the flow state of the water flow in the horizontal subsurface flow wetland is stable. Therefore, the effect of purifying water quality is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a horizontal subsurface flow wetland, a system and an anti-clogging method. Background Art

[0002] As an ecological and low-cost sewage treatment and ecological restoration technology, horizontal subsurface flow constructed wetlands can withstand large hydraulic loads and pollutant loads and are widely used in the denitrification of sewage and wastewater. The removal and transformation of pollutants in horizontal subsurface flow constructed wetlands integrate physical, chemical and biological processes. The denitrification capacity of horizontal subsurface flow constructed wetlands is derived from the synergistic mechanism. There are many denitrification mechanisms in horizontal subsurface flow constructed wetlands, including plant absorption, substrate adsorption, nitrification-denitrification, etc. Nitrification-denitrification using microorganisms is the main way to denitrify horizontal subsurface flow constructed wetlands. The main factors affecting denitrification in horizontal subsurface flow constructed wetlands include dissolved oxygen, substrate, plants, carbon source and operating conditions. It is widely used in the secondary and tertiary treatment of urban and domestic sewage, and can effectively treat organic matter, nitrogen, phosphorus and heavy metals.

[0003] In the prior art, there are differences in the particle size of fillers used in horizontal subsurface flow wetlands, making it difficult to lay completely uniform construction. The organic pollution load and suspended matter pollution load along the internal water flow direction are different, and the cross-sectional flow rate is difficult to be exactly the same. During the operation of horizontal subsurface flow wetlands, inorganic and difficult-to-degrade suspended matter in the suspended matter in the wetland influent will accumulate in the subsurface flow wetlands. The microbial sludge inside the wetland contains extracellular polymers, which have strong cohesion and adsorb organic and inorganic pollutants in the influent. In addition, organic matter produced by the withering and corruption of aquatic plants in the wetland will cause blockage of horizontal subsurface flow wetlands. During the long-term operation of horizontal subsurface flow wetlands, the blockage trends in different spatial areas are inconsistent. Long-term operation will lead to blockages, and the water distribution of the horizontal subsurface flow wetlands of each unit also varies greatly, which directly affects the water purification effect of the project. Summary of the invention

[0004] In view of this, the present invention provides a horizontal subsurface flow wetland, a system and an anti-clogging method to solve the problem in the prior art that the horizontal subsurface flow wetland is easily clogged, thereby affecting water purification.

[0005] In the first aspect, the present invention provides a horizontal subsurface flow wetland, including a planting layer, a purification layer, a stabilization layer and a partition. The planting layer, the purification layer and the stabilization layer are arranged in sequence from top to bottom. A plurality of partitions are detachably arranged in the planting layer, the purification layer and the stabilization layer along the direction of water flow. A plurality of water holes are provided on the partitions, and the water holes on adjacent partitions are staggered in height.

[0006] Beneficial effects: The present invention staggers the water holes on adjacent partitions in height. Through the diversion effect of the water holes, the water flow in the horizontal submerged flow wetland can achieve variable and reciprocating flow states such as "low-medium-high", "high-medium-low", and "medium-medium-medium" along the flow direction, thereby constructing a "wave-like" hydrodynamic flow state inside the horizontal submerged flow wetland unit. The controllable hydrodynamic flow state is beneficial to the dynamic balance of the pollution load inside the horizontal submerged flow wetland and reduces the overall clogging trend. At the same time, the changing water flow state can have a certain flushing and washing effect on the accumulated sludge inside the submerged flow wetland, so that the sludge flows into the horizontal submerged flow wetland purification stabilization layer with the water flow, thereby reducing the occurrence of local blockages, thereby ensuring the effect of purifying water quality.

[0007] In an optional embodiment, the water holes include a first water hole, a second water hole and a third water hole, the first water hole is arranged at the upper position of the partition, the second water hole is arranged at the middle position of the partition, the third water hole is arranged at the lower position of the partition, and the first water hole, the second water hole and the third water hole are respectively arranged on adjacent partitions.

[0008] Beneficial effect: The present invention arranges water holes at different heights on different baffles. By arranging baffles with water holes at different heights for the horizontal submerged flow wetland, the water holes can make the water body in the horizontal submerged flow wetland produce variable and reciprocating flow states such as "low-medium-high", "high-medium-low", and "medium-medium-medium", so that different blockage conditions in the horizontal submerged flow wetland can be adjusted, thereby reducing blockage and ensuring the effect of purifying water quality.

[0009] In an optional embodiment, the horizontal subsurface flow wetland further includes a gravel area, and the gravel area is arranged on both sides of the partition.

[0010] Beneficial effect: The present invention provides a gravel area on both sides of the partition to provide a stable support for the partition, so that the partition is more stable when water passes through the water hole.

[0011] In an optional embodiment, the horizontal subsurface flow wetland further includes a mud discharge pipe, which is disposed at the bottom of the stabilization layer and between adjacent partitions. The mud discharge pipe is provided with mud discharge holes, and one end of the mud discharge pipe is suitable for being connected to the ecological pond.

[0012] Beneficial effect: When the horizontal subsurface flow wetland in the present invention is seriously clogged with sludge, part of the sludge can be discharged through the sludge discharge pipe, and the sludge in the bottom purification stabilization area can be discharged by utilizing the water pressure gravity in the wetland, thereby reducing the clog in the wetland.

[0013] In an optional embodiment, the horizontal subsurface flow wetland further includes a detection component, and a plurality of detection components are vertically arranged in the planting layer, the purification layer and the stabilization layer.

[0014] Beneficial effects: The present invention detects the resistivity distribution of the inter-sections of adjacent detection components in the horizontal subsurface flow wetland through the detection components. According to the change of resistivity, the blockage situation of the horizontal subsurface flow wetland can be obtained. Then, the tidal hydrodynamics is used to adjust the direction of the horizontal subsurface flow wetland to change tidally, thereby restoring the effective porosity of the horizontal subsurface flow wetland, ensuring the long-term and stable operation of the horizontal subsurface flow wetland, and reducing the workload of management and maintenance.

[0015] In an optional embodiment, the detection component includes a tube body and a detection component. A plurality of openings are provided on the outer wall of the tube body. The tube body vertically penetrates the planting layer, the purification layer and the stabilization layer. The detection component is arranged inside the tube body.

[0016] In an optional embodiment, the detection component includes an electrode and a detector, the electrode is arranged inside the tube body, and the detector is electrically connected to the electrode.

[0017] In an optional embodiment, the horizontal subsurface flow wetland further comprises electrochemically active microorganisms, and the electrochemically active microorganisms are arranged in at least one of the planting layer, the purification layer and the stabilization layer.

[0018] Beneficial effects: When the horizontal subsurface flow wetland is severely blocked, the present invention can be combined with the addition of electrochemically active microorganisms to promote the degradation of EPS extracellular polymer blocking substances in the horizontal subsurface flow wetland, thereby alleviating the blockage.

[0019] In a second aspect, the present invention further provides a horizontal subsurface flow wetland system, comprising a frame and the above-mentioned horizontal subsurface flow wetland, wherein a plurality of frames are arranged in parallel, and the horizontal subsurface flow wetland is arranged in the frame.

[0020] In a third aspect, the present invention further provides a method for preventing blockage of a horizontal subsurface flow wetland, using the above-mentioned horizontal subsurface flow wetland system, the method comprising:

[0021] In each group of horizontal subsurface flow wetland units, several monitoring sections are evenly set along the water flow direction;

[0022] Several detection components are evenly arranged in each section;

[0023] Obtaining resistivity distribution of each adjacent detection component;

[0024] Determine the blockage status of the horizontal subsurface flow wetland units at the locations of each detection component;

[0025] According to the blockage situation at different locations, the partitions at the corresponding locations are replaced;

[0026] Electrochemically active microorganisms were added to horizontal subsurface flow wetland cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A top view of a horizontal subsurface flow wetland according to an embodiment of the present invention;

[0029] Figure 2 A side cross-sectional view of a horizontal subsurface flow wetland according to an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of a baffle in a horizontal subsurface flow wetland according to an embodiment of the present invention;

[0031] Figure 4 A top view of a detection element in a horizontal subsurface flow wetland according to an embodiment of the present invention;

[0032] Figure 5 The figure is a top view of a horizontal subsurface flow wetland system according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Planting layer;

[0035] 2. Purification layer;

[0036] 3. Stability layer;

[0037] 4. partition; 41. water hole; 411. first water hole; 412. second water hole; 413. third water hole;

[0038] 5. Detection components;

[0039] 6. Framework;

[0040] 7. Water inlet pipe;

[0041] 8. Drain pipe;

[0042] 9. Hydrodynamic flow pattern;

[0043] 100. Horizontal subsurface flow wetland. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0045] Combine the following Figures 1 to 5 , describing an embodiment of the present invention.

[0046] According to an embodiment of the present invention, on the one hand, Figures 1 to 5 As shown, a horizontal subsurface flow wetland 100 is provided, comprising a planting layer 1, a purification layer 2, a stabilization layer 3 and a partition 4, wherein the planting layer 1, the purification layer 2 and the stabilization layer 3 are arranged in sequence from top to bottom, and a plurality of partitions 4 are detachably arranged in the planting layer 1, the purification layer 2 and the stabilization layer 3 along the direction of water flow, and a plurality of water holes 41 are provided on the partition 4, and the water holes 41 on adjacent partitions 4 are staggered in height.

[0047] Specifically, Figure 2 As shown, in this embodiment, the planting layer 1, the purification layer 2 and the stabilization layer 3 are arranged in sequence from top to bottom, wherein the bottom stabilization layer 3 is about 0.3m high and uses large-size gravel with a gravel particle size of about 10cm. The hydraulic conductivity coefficient of the gravel is ≥100000m / d, and there is a certain biological sludge storage space. In this embodiment, water flows in from one side of the horizontal submerged flow wetland 100, passes through the planting layer 1, the purification layer 2 and the stabilization layer 3, and flows out from the other side. When the water passes through the partition 4, due to the different height positions of the water holes 41 on the adjacent partitions 4, the water can form a "wave-like" hydrodynamic flow state 9 in the horizontal submerged flow wetland 100.

[0048] In this embodiment, Figure 1 and Figure 2 As shown, the baffle 4 is vertically arranged in the horizontal submerged flow wetland 100, and the baffle 4 passes through the planting layer 1 and the purification layer 2 and is inserted into the stabilization layer 3. A plurality of water holes 41 are arranged at the same height on each baffle 4, and the water holes 41 face the direction of the water flow. The water holes 41 on different baffles 4 are arranged at different heights. By arranging the baffles 4 with water holes 41 at different heights in the horizontal submerged flow wetland 100, when the water passes through the water holes 41 at different positions, a variable, reciprocating "wave-like" flow state such as "low-medium-high", "high-medium-low", and "medium-medium-medium" will be formed in the horizontal submerged flow wetland 100.

[0049] The present invention arranges the water holes 41 on adjacent partitions 4 in an alternating height. Through the diversion effect of the water holes 41, the flow state of the water in the horizontal submerged flow wetland 100 can achieve variable and reciprocating flow states such as "low-medium-high", "high-medium-low", and "medium-medium-medium" along the flow direction, thereby constructing a "wave-like" hydrodynamic flow state 9 inside the horizontal submerged flow wetland 100 unit. The controllable hydrodynamic flow state 9 is beneficial to dynamically balancing the pollution load inside the horizontal submerged flow wetland 100 and reducing the overall clogging trend. At the same time, the changing water flow state can have a certain flushing and washing effect on the accumulated sludge inside the horizontal submerged flow wetland 100, so that the sludge flows into the purification stabilization layer 3 of the horizontal submerged flow wetland 100 with the water flow, thereby reducing the occurrence of local blockages, thereby ensuring the effect of purifying water quality.

[0050] In one embodiment, Figure 3 As shown, the water through hole 41 includes a first water through hole 411, a second water through hole 412 and a third water through hole 413. The first water through hole 411 is arranged at the upper position of the partition 4, the second water through hole 412 is arranged at the middle position of the partition 4, and the third water through hole 413 is arranged at the lower position of the partition 4. The first water through hole 411, the second water through hole 412 and the third water through hole 413 are respectively arranged on adjacent partitions 4.

[0051] Specifically, in this embodiment, there is no specific limitation on the setting position of the water hole 41. In order to conform to the actual situation, in this embodiment, there are three types of water holes 41. The first water hole 411 is located at the upper position of the partition 4, the second water hole 412 is located at the middle position of the partition 4, and the third water hole 413 is located at the bottom position of the partition 4. Each partition 4 is provided with a water hole 41. When different combinations of partitions 4 are placed in the horizontal submerged flow wetland 100, the water body will present different "wave-like" hydrodynamic flow states 9 when passing through the partition 4.

[0052] The present invention arranges water holes 41 at different heights on different partitions 4. By arranging the partitions 4 with water holes 41 at different heights in the horizontal submerged flow wetland 100, the water holes 41 can make the water body in the horizontal submerged flow wetland 100 produce variable and reciprocating flow states such as "low-medium-high", "high-medium-low", and "medium-medium-medium", so that different blockage conditions in the horizontal submerged flow wetland 100 can be adjusted, thereby reducing blockage and ensuring the effect of purifying water quality.

[0053] In one embodiment, the horizontal subsurface flow wetland 100 further includes a gravel area, and the gravel area is arranged on both sides of the partition 4.

[0054] Specifically, in this embodiment, a gravel area is arranged before and after the partition 4. The width of the gravel area is 1 m. The gravel is round and has a large particle size of 10 cm to 15 cm.

[0055] The present invention provides a gravel area on both sides of the partition 4 to provide a stable support for the partition 4, so that the partition 4 is more stable when the water passes through the water hole 41.

[0056] In one embodiment, the horizontal subsurface flow wetland 100 further includes a mud discharge pipe, which is disposed at the bottom of the stabilization layer 3 and between adjacent partitions 4. The mud discharge pipe is provided with mud discharge holes, and one end of the mud discharge pipe is suitable for being connected to the ecological pond.

[0057] Specifically, in this embodiment, a plurality of mud discharge holes are provided on the mud discharge pipe. The sludge in the horizontal submerged flow wetland 100 falls from the mud discharge holes into the mud discharge pipe, and is discharged into the ecological pond through the mud discharge pipe. When the horizontal submerged flow wetland 100 is moderately or severely blocked, the mud can be discharged through the mud discharge pipe to alleviate the blockage.

[0058] When the horizontal submerged flow wetland 100 of the present invention is seriously clogged with sludge, part of the sludge can be discharged through the sludge discharge pipe, and the sludge in the bottom stabilization layer 3 can be discharged by using the water pressure gravity in the wetland, thereby reducing the blockage in the wetland.

[0059] In one embodiment, Figure 4 As shown, the horizontal subsurface flow wetland 100 further includes a detection component 5 , and a plurality of detection components 5 are vertically arranged in the planting layer 1 , the purification layer 2 and the stabilization layer 3 .

[0060] Specifically, in this embodiment, the detection component 5 is inserted downward from the top of the planting layer 1 to the stabilization layer 3, and multiple detection components 5 are densely distributed in the horizontal submerged flow wetland 100. The resistivity distribution of the intersecting surfaces of adjacent detection components 5 is measured regularly, and the blockage of the horizontal submerged flow wetland 100 is judged according to the change in resistivity. Then, by adjusting and replacing different partitions 4, the direction of the horizontal submerged flow wetland 100 changes tidally, and the microbial sludge is naturally degraded in some blocked areas.

[0061] The present invention detects the resistivity distribution of the inter-sections of adjacent detection components 5 in the horizontal subsurface flow wetland 100 through the detection component 5. According to the change of the resistivity, the blockage situation of the horizontal subsurface flow wetland 100 can be obtained. Then, the tidal hydrodynamics is used to adjust the direction of the horizontal subsurface flow wetland 100 to make tidal changes, thereby restoring the effective porosity of the horizontal subsurface flow wetland 100, ensuring the long-term stable operation of the horizontal subsurface flow wetland 100, and reducing the workload of management and maintenance.

[0062] In one embodiment, the detection component 5 includes a tube body and a detection component. A plurality of openings are provided on the outer wall of the tube body. The tube body vertically penetrates the planting layer 1, the purification layer 2 and the stabilization layer 3, and the detection component is arranged inside the tube body.

[0063] Specifically, in the present embodiment, the water in the horizontal submerged flow wetland 100 can penetrate into the pipe body through the openings on the pipe body. The water content in the pipe body can be known by detecting the resistivity in the pipe body through the detection part. If the horizontal submerged flow wetland 100 is seriously blocked, the water content in the horizontal submerged flow wetland 100 is relatively high, the amount of water entering the pipe body increases, and the measured resistivity is relatively low. Based on this feature, the severity of the blockage in the horizontal submerged flow wetland 100 can be known.

[0064] In one embodiment, the detection member includes an electrode and a detector, the electrode is arranged inside the tube body, and the detector is electrically connected to the electrode.

[0065] Specifically, in this embodiment, the two sides of the electrode are positive and negative electrodes, and the positive and negative electrodes are connected to the detector. In this embodiment, the detector adopts a high-density resistivity meter. According to the operation and management requirements of the horizontal subsurface flow wetland 100, the electrode is inserted into the pipe body, and the resistivity distribution of the electrodes in each adjacent pipe body is measured by the high-density resistivity meter. The in-situ resistivity and the horizontal subsurface flow wetland 100 blockage test section are used to obtain the resistivity-blockage normalized curve. Combined with different blockage conditions, according to the blockage condition, values ​​1 to 2 are assigned for no blockage, values ​​3 to 4 are assigned for slight blockage, values ​​5 to 6 are assigned for moderate blockage, and values ​​≥ 7 are assigned for severe blockage, and a spatial field distribution model of the target horizontal subsurface flow wetland 100 is constructed.

[0066] In one embodiment, the horizontal subsurface flow wetland 100 further includes electrochemically active microorganisms, which are disposed in at least one of the planting layer 1 , the purification layer 2 , and the stabilization layer 3 .

[0067] Specifically, the electrochemically active microorganisms in this embodiment can be electrochemically active bacteria (EAB), which are a large class of microorganisms in nature that can perform extracellular respiration and metabolize and transform pollutants in the environment. In this process, the unique extracellular electron transfer of EAB plays an important role, so this function can be used to achieve pollutant degradation.

[0068] When the horizontal subsurface flow wetland 100 is severely blocked, electrochemically active microorganisms can be added to promote the degradation of the blocking substances of the extracellular polymers (EPS) in the horizontal subsurface flow wetland 100, thereby alleviating the blockage.

[0069] According to an embodiment of the present invention, Figure 5 As shown, on the other hand, a horizontal subsurface flow wetland 100 system is also provided, including a frame 6 and the above-mentioned horizontal subsurface flow wetland 100, a plurality of frames 6 are arranged in parallel, and the horizontal subsurface flow wetland 100 is arranged in the frame 6.

[0070] Specifically, in this embodiment, the shape of the frame 6 is not specifically limited. In order to conform to the actual situation, the frame 6 in this embodiment is a rectangular structure, and multiple frames 6 are arranged in parallel. The horizontal subsurface flow wetland 100 is arranged in the frame 6. The frame 6 is provided with a water inlet and a drain. The water inlet pipe 7 and the drain pipe 8 are respectively connected to the water inlet and the drain on each frame 6. Gates are provided at the water inlet and the drain to control the on and off of water in and out.

[0071] According to an embodiment of the present invention, on the other hand, a method for preventing blockage of a horizontal subsurface flow wetland 100 is provided. The method adopts the above-mentioned horizontal subsurface flow wetland system, and comprises:

[0072] In each group of 100 units of horizontal subsurface flow wetlands, several monitoring sections are evenly set along the direction of water flow;

[0073] Several detection components 5 are evenly arranged in each section;

[0074] Obtaining the resistivity distribution of each adjacent detection component 5;

[0075] Determine the blockage status of the horizontal subsurface wetland 100 units at the locations of each detection component 5;

[0076] According to the blockage situation at different positions, the partition 4 at the corresponding position is replaced;

[0077] Electrochemically active microorganisms were added to 100 units of horizontal subsurface flow wetlands.

[0078] Specifically, when the horizontal subsurface flow wetland 100 system in this embodiment is used, a number of monitoring sections are evenly set in each group of horizontal subsurface flow wetland 100 units along the water flow direction, and a certain number of detection components 5 are evenly set in each section. The detection component 5 needs to extend to the stable layer 3 at the bottom of the horizontal subsurface flow wetland 100. Then, according to the operation and management requirements, the electrode is inserted into the pipe body, and the resistivity distribution in each adjacent pipe body is measured using a high-density resistivity meter. The in-situ resistivity and subsurface flow wetland blockage test section are tested to obtain a resistivity-blockage normalized curve. Combined with different blockage conditions, according to the blockage condition, a value of 1 to 2 is assigned for no blockage, a value of 3 to 4 is assigned for slight blockage, a value of 5 to 6 is assigned for moderate blockage, and a value of ≥7 is assigned for severe blockage, so as to construct a spatial field distribution model of the target horizontal subsurface flow wetland 100.

[0079] According to the needs of long-term stable operation and maintenance, as well as the changes in the pollution load of the influent and the changes in seasonal temperature, a spatial field distribution model of blockage is constructed to track the development trend of blockage and identify the blockage situation. Combined with the blockage results, when the blockage is assigned a value of 1 to 2, keep records and continue to track; when there is a slight blockage area with an assignment of 3 to 4, replace the partition 4 in the area and adjust the hydrodynamic flow state 9 in the area; when there is a moderate blockage of 5 to 6 or a severe blockage of ≥7, the partition 4 with water holes 41 in the front and rear sections of the area can be replaced with a partition 4 without holes, and the partition 4 is inserted into the bottom of the blocked area and does not extend into the stable layer 3 at the bottom. This section of the area is rotated, and combined with the bottom mud discharge, the blockage recovery is tracked synchronously until normal operation is restored. In case of severe blockage, electrochemically active bacteria can also be added to promote the degradation of EPS extracellular polymer blockage substances in horizontal submerged wetlands and accelerate the relief of blockage.

[0080] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A horizontal subsurface flow wetland, characterized in that: include: Planting layer (1); Purification layer (2); A stabilizing layer (3), wherein the planting layer (1), the purification layer (2) and the stabilizing layer (3) are arranged in sequence from top to bottom; Partitions (4), wherein a plurality of the partitions (4) are detachably arranged in the planting layer (1), the purification layer (2) and the stabilization layer (3) along the direction of water flow, and a plurality of water holes (41) are provided on the partitions (4), and the water holes (41) on adjacent partitions (4) are staggered in height.

2. The horizontal subsurface flow wetland according to claim 1, characterized in that: The water hole (41) comprises: A first water passage hole (411), wherein the first water passage hole (411) is arranged at an upper position of the partition plate (4); A second water passage hole (412), wherein the second water passage hole (412) is arranged in the middle of the partition plate (4); A third water through hole (413), the third water through hole (413) is arranged at the lower part of the partition (4), and the first water through hole (411), the second water through hole (412) and the third water through hole (413) are respectively arranged on adjacent partitions (4).

3. The horizontal subsurface flow wetland according to claim 1 or 2, characterized in that: Also includes: A gravel area, wherein the gravel area is arranged on both sides of the partition (4).

4. The horizontal subsurface flow wetland according to claim 1, characterized in that: Also includes: A mud discharge pipe is arranged at the bottom of the stabilization layer (3) and between adjacent partitions (4). A mud discharge hole is provided on the mud discharge pipe. One end of the mud discharge pipe is suitable for being connected to the ecological pond.

5. The horizontal subsurface flow wetland according to claim 1, characterized in that: Also includes: A detection component (5), wherein a plurality of the detection components (5) are vertically arranged in the planting layer (1), the purification layer (2) and the stabilization layer (3).

6. The horizontal subsurface flow wetland according to claim 5, characterized in that: The detection component (5) comprises: A tube body, wherein a plurality of openings are provided on the outer wall of the tube body, and the tube body is vertically inserted through the planting layer (1), the purification layer (2) and the stabilization layer (3); A detection member is arranged inside the tube body.

7. The horizontal subsurface flow wetland according to claim 6, characterized in that: The detection part comprises: An electrode, wherein the electrode is arranged inside the tube body; A detector is electrically connected to the electrode.

8. The horizontal subsurface flow wetland according to claim 1, characterized in that: Also includes: Electrochemically active microorganisms are arranged in at least one of the planting layer (1), the purification layer (2) and the stabilization layer (3).

9. A horizontal subsurface flow wetland system, characterized in that: include: A frame (6), wherein a plurality of the frames (6) are arranged in parallel; The horizontal subsurface flow wetland (100) according to any one of claims 1 to 8, wherein the horizontal subsurface flow wetland (100) is arranged in the frame (6).

10. A method for preventing blockage of a horizontal subsurface flow wetland, characterized in that: Using the horizontal subsurface flow wetland system of claim 9, the method comprises: In each group of horizontal subsurface flow wetland (100) units, a number of monitoring sections are evenly arranged along the water flow direction; A plurality of detection components (5) are evenly arranged in each section; Obtaining the resistivity distribution of each adjacent detection component (5); Determining the blockage status of the horizontal subsurface flow wetland (100) units at the locations of the respective detection components (5); According to the blockage conditions at different positions, the partition plate (4) at the corresponding position is replaced; Electrochemically active microorganisms are added to a horizontal subsurface flow wetland (100) unit.

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