Modularized wetland sewage treatment test device and method

Abstract

The invention provides a modularized wetland sewage treatment test device and method.The modularized wetland sewage treatment test device comprises a treatment experiment box, a layered treatment mechanism is arranged in the treatment experiment box, and the layered treatment mechanism is used for conducting auxiliary stage treatment on water flow; the layering treatment mechanism comprises first inclined plates symmetrically arranged on the upper side in the treatment experiment box, a first flat plate is arranged between the bottom ends of the first inclined plates, a first leakage net is arranged in the middle of the first flat plate, second inclined plates symmetrically distributed are arranged in the middle of the interior of the treatment experiment box, and a second flat plate is arranged at the bottom ends of the second inclined plates. A second leakage net is arranged in the middle of the second flat plate, and a U-shaped confluence plate is arranged on the lower side in the treatment experiment box. According to the modularized wetland sewage treatment test device and the modularized wetland sewage treatment test method, water flow can be in a zigzag and controllable flow state under the action of a multi-stage stacked trapezoidal structure, so that the effective hydraulic retention time is remarkably prolonged, and the reaction volume utilization rate can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field, and particularly relates to a modular wetland sewage treatment test device and method. BACKGROUND

[0002] Wetland sewage treatment generally refers to artificial wetland sewage treatment technology, which is a sewage treatment system artificially constructed and controlled to imitate the structure and function of a natural wetland ecological system, is an embodiment of engineering and productization of ecological principles, and provides a sustainable solution combining environmental, social and economic benefits.

[0003] The existing modular wetland sewage treatment test device is constructed by reinforced concrete and geomembrane (HDPE membrane) impermeable material to form a pool / bed, and a substrate (filler) layer is filled in the inside of the pool / bed, which usually includes large-diameter gravel, medium-diameter gravel, crushed stone, special functional filler and sand layer, and then plants are planted on the substrate, and water distribution and water collection systems are used to ensure uniform inflow and outflow of sewage, so as to achieve sewage treatment. However, in actual use, the water flow passes through the filler bed vertically and linearly, forming a stable "preferential flow path" between the water inlet end and the water outlet end, and most of the water flow quickly passes through this channel, resulting in that a large number of filler regions (especially the middle and corners) cannot fully participate in the reaction, forming a "dead zone", and the effective reaction volume utilization rate is low. SUMMARY

[0004] Therefore, the present application provides a modular wetland sewage treatment test device and method, which can significantly increase the effective hydraulic retention time by using a multi-stage laminated trapezoidal structure to make the water flow tortuous but controllable under the action of the structure, and can effectively improve the reaction volume utilization rate.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a modular wetland sewage treatment test device and method, comprising a treatment experiment box, a layered treatment mechanism is arranged in the inside of the treatment experiment box, and the layered treatment mechanism is used for assisting in grading treatment of water flow; The layered treatment mechanism comprises symmetrically arranged first inclined plates on the upper side of the inside of the treatment experiment box, a flat plate one is arranged between the bottom ends of the first inclined plates, a mesh one is arranged in the middle of the flat plate one, symmetrically distributed second inclined plates are arranged in the middle of the inside of the treatment experiment box, a flat plate two is arranged at the bottom end of the second inclined plates, a mesh two is arranged in the middle of the flat plate two, and a U-shaped flow collecting plate is arranged at the lower side of the inside of the treatment experiment box; A rotary water distribution mechanism is further arranged on the treatment experiment box, and the rotary water distribution mechanism is used for water distribution for floating plants.

[0006] As a further improvement of the present application, the first inclined plate is arranged on the upper side of the inner wall of the two sides of the treatment experiment box and is inclined towards the vertical center of the treatment experiment box, and the second inclined plate is arranged in the middle of the treatment experiment box and is inclined towards the side wall of the treatment experiment box from the vertical center of the treatment experiment box; the layered treatment mechanism further comprises a partition plate one arranged uniformly in the first inclined plate, a partition plate two arranged uniformly on the second inclined plate, and a plurality of partition plate threes arranged uniformly on the two sides of the U-shaped bus bar, and a plurality of water leakage holes are formed in the partition plate one, the partition plate two and the partition plate three.

[0007] As a further improvement of the present application, the rotary water distribution mechanism comprises two sliding rails arranged on the upper side of the treatment experiment box, sliding blocks are arranged on the two sides of the sliding rails, water distribution pipes are arranged between the sliding blocks on the same side, a plurality of water outlets are arranged on the lower side of the water distribution pipe, and water inlet valves are arranged at the two end heads of the water distribution pipe; the rotary water distribution mechanism further comprises two fixed plates arranged on the upper side of the treatment experiment box, a plurality of tooth groups are arranged uniformly on the lower surface of the fixed plate, gears are arranged on the two sides of the outer arc surface of the water distribution pipe, and the gears are connected with the tooth groups.

[0008] As a further improvement of the present application, the rotary water distribution mechanism further comprises a fixed frame arranged on the upper surface of the treatment experiment box, connecting blocks are arranged on the two sides of the fixed frame, and the connecting blocks are connected and fixed with the water distribution pipe; a control seat is arranged on the upper side of the fixed frame, movable rods are arranged on the two sides of the control seat, the end heads of the movable rods are connected and fixed with the connecting blocks, adjusting lead screws are rotatably arranged on the two sides of the inside of the control seat, the adjusting lead screws are threadedly connected with the adjacent movable rods, a double-shaft motor is arranged in the middle of the control seat, and the output shafts of the double-shaft motor are fixed between the adjacent adjusting lead screws through a shaft coupling.

[0009] As a further improvement of the present application, the lower side of the treatment experiment box is provided with a water outlet pipe, water outlet valves are arranged at the two ends of the water outlet pipe, the water outlet arranged in the middle of the U-shaped bus bar is connected with the water outlet pipe in communication, the bottom end of the treatment experiment box is provided with a base, and mounting holes are formed in the four corners of the lower surface of the base.

[0010] A modular wetland sewage treatment test method, the use method is as follows: S1, a plurality of treatment experiment boxes are placed in parallel in the reserved working area, bolts are passed through the mounting holes formed in the four corners of the lower surface of the base, and then the bolts are screwed by external tools to fix the position of the treatment experiment box, so that the modular treatment experiment boxes arranged in parallel can form a whole artificial wetland sewage treatment experiment unit system; S2, on the U-shaped collector plate located at the lowermost layer, lay the mineralization adsorption layer (composed of zeolite, steel slag and other adsorption fillers), through the evenly arranged partition three on both sides of the U-shaped collector plate to facilitate the uniform laying of the mineralization adsorption layer, on the trapezoidal plate body composed of inclined plate two and flat plate two located in the middle, lay the anaerobic denitrification layer (composed of special modified biochar fillers), through the evenly arranged partition two on both sides of the inclined plate two to facilitate the uniform laying of the anaerobic denitrification layer, on the inverted trapezoidal plate body composed of inclined plate one and flat plate one located at the upper side, lay the aerobic nitrification layer (composed of sand layer, gravel and broken stone), then plant water celery and other plants with extremely strong oxygen excretion ability on the aerobic nitrification layer to form a floating plant filter bed; S3, connect the water pump arranged on the external water supply tank with the water inlet valve arranged on each treatment experiment box through the water pipe group, then connect the water collecting pipe group arranged on the water collecting tank with the water outlet valve arranged on each treatment experiment box, so that the water source in the external water supply tank is transported into the water distribution pipe arranged on each treatment experiment box through the water pipe group under the action of the water pump, through the water outlet arranged on the water distribution pipe, to make the sewage evenly sprayed on the floating plant filter bed like drizzle; S4, the sewage sprayed from the water distribution pipe enters the aerobic nitrification layer from the floating plant filter bed, and is denitrified, pH adjusted and phosphorus removed by the floating plant filter bed in the process; The sewage entering the aerobic nitrification layer is strengthened nitrification, and the sewage reacted in the aerobic nitrification layer continuously seeps down until it stays on the inclined plate one, then flows to the flat plate one located on the upper side of the vertical center of the treatment experiment box through the inclined plate one inclined towards the vertical center of the treatment experiment box, then seeps downward into the anaerobic denitrification layer laid on the trapezoidal plate body composed of inclined plate two and flat plate two through the screen one arranged on the flat plate one, so that the sewage treated by the aerobic nitrification layer is collected in the upper middle of the treatment experiment box under the action of the inverted trapezoidal plate body composed of inclined plate one and flat plate one, and then seeps downward into the anaerobic denitrification layer through the screen one; The sewage seeping into the anaerobic denitrification layer promotes denitrification under the action of the special modified biochar fillers, and is further treated, the sewage reacted and treated in the anaerobic denitrification layer falls on the inclined plate two, which is inclined downward from the vertical center of the experiment box, so that the sewage located in the middle is divided into two sides through the two symmetrical inclined plate two, and then the sewage is divided into two sides downward by the trapezoidal plate body composed of inclined plate two and flat plate two, and then seeps downward into the mineralization adsorption layer through the screen two on the flat plate two on both sides; The sewage seeping into the mineralization adsorption layer is dredged under the action of the zeolite, steel slag and other adsorption fillers, and is further purified, the purified sewage flows in the U-shaped collector plate, and the sewage is re-converged to the bottom middle of the U-shaped collector plate through the U-shaped collector plate; S5, the purified sewage gathered in the middle of the bottom end of the U-shaped busbar flows into the outlet pipe, and then flows into the water collecting pipe group, and then enters the inside of the water collecting tank through the water collecting pipe group, thereby realizing sewage treatment and purification; S6, when the water distribution pipe on the upper side of each treatment experiment tank distributes water, the double-shaft motor is controlled to rotate in the forward and reverse directions, the output shaft of the double-shaft motor drives the adjusting screw rod connected thereto to rotate, and in the process of the forward and reverse rotation of the adjusting screw rod, the two movable rods on the two sides are brought closer to each other or moved away from each other through the threaded relationship between the adjusting screw rod and the movable rods, thereby driving the two connecting blocks on the two sides to move closer to each other or away from each other, and further driving the water distribution pipes on the two sides of the treatment experiment tank to move closer to each other or away from each other, so that the water distribution pipes move horizontally and reciprocally during watering, thereby quickly and uniformly watering the floating plant filter bed; S7, in the process of horizontal reciprocating movement of the water distribution pipe, when the gear moves to contact the gear teeth set, the water distribution pipe where the gear is located is driven to rotate through the meshing relationship between the gear teeth set and the gear, and since the gear teeth set is uniformly spaced, when the gear moves to the gap between the gear teeth set, the gear rotates in the opposite direction under the action of gravity, so that the water outlet on the lower side of the water distribution pipe is perpendicular to the ground again, and further through the cooperation of the gear and the gear teeth set, the water distribution pipe can rotate in the forward and reverse directions during the horizontal reciprocating movement, and the sewage can be quickly and uniformly sprayed on the floating plant filter bed.

[0011] In summary, the present application has at least one of the following beneficial technical effects compared with the prior art: Firstly, the base is provided with mounting holes and fixed by bolts, so that the treatment experiment tank can be connected and assembled stably in a standardized manner. This modular design enables the entire experimental unit system to be assembled like building blocks, and the experiment tanks can be flexibly added, reduced or rearranged according to experimental requirements (such as different water loads and pollution loads). This design avoids the time-consuming and laborious on-site construction of traditional wetland experimental tanks, and the experimental tanks cannot be moved. Researchers can quickly deploy a complete and scale-customizable pilot system in the working area, or combine multiple independent experiment tanks into different process series / parallel processes for comparative study. This not only shortens the experimental preparation period and reduces the site modification requirements, but also provides great convenience for future upgrading and expansion of the system.

[0012] Secondly, the device adopts a layering structure of inverted trapezoidal aerobic layer, right trapezoidal anaerobic layer and U-shaped mineralization layer. This is not a simple spatial stacking, but a sophisticated hydraulic flow design. Under the action of gravity, the sewage first converges from both sides to the center plate through the inverted trapezoidal structure, then uniformly infiltrates to the right trapezoidal anaerobic layer through the screen, and then is shunted to both sides, and finally re-converges through the U-shaped plate. This process simulates and strengthens the diffusion, convergence and redistribution process of water flow in natural wetlands, effectively increases the hydraulic retention time, and reduces the risk of water flow short circuit. More importantly, this structure realizes the spatial staged treatment of pollutants: the upper aerobic nitrification layer is concentrated on the upper part for ammonia oxidation, and the treated nitrate liquid flows downward; the right trapezoidal structure of the anaerobic denitrification layer is beneficial to the full contact between the shunted sewage and the filler, and denitrification is carried out in an anoxic environment; the U-shaped mineralization layer at the bottom finally adsorbs phosphorus and stabilizes water quality. The functional layers are physically separated but hydraulically connected, creating a stable and efficient zoned reaction environment.

[0013] Thirdly, the water distribution mechanism combines horizontal reciprocating movement and intermittent forward and reverse rotation. The horizontal movement ensures the uniform coverage of the sewage on the surface of the floating plant filter bed, avoiding local overload and uneven wetting caused by fixed water distribution points. The rotating action of the water distribution pipe makes the water outlet in a "fine rain spraying" mode, greatly increasing the contact area and falling time of water droplets and air, significantly improving the dissolved oxygen content of the water body during the water distribution stage, and creating a favorable oxygen environment for the aerobic nitrification layer. This dynamic water distribution method can also continuously "disturb" the plant roots and surface substrate, preventing the accumulation of suspended solids at fixed points and forming a surface sealing layer, which is an effective physical means to prevent clogging at the front end of the wetland system.

[0014] Fourthly, from the external water supply tank, water pump and valve to the internally movable / rotatable water distribution pipe and the clearly layered reaction zones, each link has measurable and adjustable characteristics. Researchers can accurately control the water inflow, water quality, water distribution mode (moving speed, rotation frequency), and can clearly observe and monitor the hydraulic and biochemical states of each treatment stage (aerobic, anaerobic, mineralization) through the layered structure. This high controllability enables it to be used to systematically study the impact of single variables such as filler type, plant species, hydraulic retention time, and carbon-nitrogen ratio on wetland treatment performance, thereby conducting in-depth mechanism exploration and process parameter optimization. Compared with field wetlands or large-scale pilot tests, which are difficult to control accurately, this device can provide reliable and repeatable experimental conditions in the laboratory or controlled environment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a structural schematic diagram of the layered treatment mechanism of the present application; Figure 3It is the internal section structure schematic view of the rotating water distribution mechanism of the present application. Figure 4 It is the enlarged structure schematic view of A of the present application. Figure 5 It is the enlarged structure schematic view of B of the present application. Figure 6 It is the plane structure schematic view of the present application.

[0016] In the figure: 101, inclined plate one; 102, flat plate one; 103, mesh one; 104, inclined plate two; 105, flat plate two; 106, mesh two; 107, U-shaped bus plate; 108, partition one; 109, partition two; 110, partition three; 111, water leakage hole; 201, processing experiment box; 202, base; 203, mounting hole; 204, water outlet pipe; 205, water outlet valve; 301, sliding rail; 302, sliding block; 303, water distribution pipe; 304, water outlet; 305, water inlet valve; 306, fixed plate; 307, gear set; 308, gear; 309, fixed frame; 310, connecting block; 311, control seat; 312, movable rod; 313, adjusting screw; 314, double-shaft motor. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0018] As shown in Figure 1 , 2 , 5, a modular wetland sewage treatment test device and method, comprising a processing experiment box 201, the inside of the processing experiment box 201 is provided with a layered processing mechanism, the layered processing mechanism is used for assisting the staged treatment of water flow; The layered processing mechanism comprises symmetrical tilt plate one 101 arranged on the upper side of the inner side of the processing experiment box 201, flat plate one 102 arranged between the bottom ends of the tilt plate one 101, mesh one 103 arranged in the middle of the flat plate one 102, symmetrical tilt plate two 104 arranged in the middle of the inner side of the processing experiment box 201, flat plate two 105 arranged at the bottom end of the tilt plate two 104, mesh two 106 arranged in the middle of the flat plate two 105, and U-shaped flow collection plate 107 arranged on the lower side of the inner side of the processing experiment box 201; the tilt plate one 101 is arranged on the upper side of the inner wall of the two sides of the processing experiment box 201 and is inclined towards the vertical center of the processing experiment box 201, and the tilt plate two 104 is arranged in the middle of the processing experiment box 201 and is inclined towards the side wall of the processing experiment box 201 from the vertical center of the processing experiment box 201; the layered processing mechanism further comprises partition plate one 108 arranged on the tilt plate one 101 at equal intervals, partition plate two 109 arranged on the tilt plate two 104 at equal intervals, and partition plate three 110 arranged on the two sides of the U-shaped flow collection plate 107 at equal intervals, and a plurality of water leakage holes 111 are arranged on the partition plate one 108, the partition plate two 109 and the partition plate three 110; The processing experiment box 201 is further provided with a rotary water distribution mechanism for distributing water to the floating plants.

[0019] As shown in Figure 3 , 4 , 5, the rotary water distribution mechanism comprises two sliding rails 301 arranged on the upper side of the processing experiment box 201, sliding blocks 302 slidingly arranged on the two sides of the sliding rails 301, water distribution pipes 303 arranged between the sliding blocks 302 on the same side, a plurality of water outlets 304 arranged on the lower side of the water distribution pipes 303, and water inlet valves 305 arranged at the two end heads of the water distribution pipes 303; the rotary water distribution mechanism further comprises two fixed plates 306 arranged on the upper side of the processing experiment box 201, a plurality of tooth groups 307 arranged on the lower surface of the fixed plates 306 at equal intervals, gear wheels 308 arranged on the outer arc surfaces of the water distribution pipes 303, and the gear wheels 308 being in meshing connection with the tooth groups 307.

[0020] As shown in Figure 3 , 4As shown in Figure 5, the rotary water distribution mechanism also includes a fixed frame 309 mounted on the upper surface of the treatment test chamber 201. Connecting blocks 310 are slidably mounted on both sides of the fixed frame 309, and the connecting blocks 310 are connected and fixed to the water distribution pipe 303. A control seat 311 is mounted on the upper side of the fixed frame 309. Movable rods 312 are slidably mounted on both sides of the control seat 311. The ends of the movable rods 312 are connected and fixed to the connecting blocks 310. Adjusting screws 313 are rotatably mounted on both sides inside the control seat 311. The adjusting screws 313 are threadedly connected to the adjacent movable rods 312. A dual-axis motor 314 is mounted in the middle of the control seat 311. The output shaft of the dual-axis motor 314 is fixed to the adjacent adjusting screw 313 by a coupling.

[0021] like Figure 1 , 2 As shown, a water outlet pipe 204 is provided on the lower side of the treatment test chamber 201. Water outlet valves 205 are provided at both ends of the water outlet pipe 204. The water outlet 304 in the middle of the U-shaped manifold 107 is connected to the water outlet pipe 204. A base 202 is provided at the bottom of the treatment test chamber 201. Mounting holes 203 are provided at the four corners of the lower surface of the base 202.

[0022] A modular wetland wastewater treatment experimental method is described below: S1, multiple treatment test boxes 201 are neatly placed side by side in the reserved working area, and bolts are passed through the mounting holes 203 pre-drilled at the four corners of the lower surface of the base 202. Then, the bolts are tightened with external tools to fix the position of the treatment test boxes 201, so that the neatly arranged treatment test boxes 201 can be modularly assembled into a whole artificial wetland sewage treatment experimental unit system. S2, a mineralization adsorption layer (composed of zeolite, steel slag and other adsorption fillers) is laid on the U-shaped manifold 107 at the bottom. The uniform laying of the mineralization adsorption layer is facilitated by the partitions 110 evenly arranged on both sides of the U-shaped manifold 107. An anaerobic denitrification layer (composed of special modified biochar fillers) is laid on the trapezoidal plate composed of inclined plate 104 and flat plate 105 in the middle. The uniform laying of the anaerobic denitrification layer is facilitated by the partitions 109 evenly arranged on both sides of the inclined plate 104. An aerobic nitrification layer (composed of sand, gravel and crushed stone) is laid on the inverted trapezoidal plate composed of inclined plate 101 and flat plate 102 on the upper side. Then, plants with strong oxygen-secreting capacity, such as water celery, are planted on the aerobic nitrification layer to form a floating plant filter bed. S3, the water pump provided on the external water supply tank is connected with the water inlet valve 305 provided on each treatment experiment tank 201 through the water pipe group, and then the water collecting pipe group provided on the water collecting tank is connected with the water outlet valve 205 provided on each treatment experiment tank 201, so that the water source in the external water supply tank is transported into the water distribution pipe 303 provided on each treatment experiment tank 201 through the water pipe group under the action of the water pump, and the water is sprayed on the floating plant filter bed through the water outlet 304 provided on the water distribution pipe 303, so that the sewage is uniformly sprayed on the floating plant filter bed like drizzle; S4, the sewage sprayed from the water distribution pipe 303 enters the aerobic nitrification layer from the floating plant filter bed, and denitrification, pH adjustment and phosphorus removal are performed on the floating plant filter bed in this process; The sewage entering the aerobic nitrification layer is strengthened nitrification, and the sewage reacted in the aerobic nitrification layer continuously seeps down until it stays on the inclined plate one 101, and then flows to the flat plate one 102 located on the upper side of the vertical center of the treatment experiment tank 201 through the inclined plate one 101 inclined toward the vertical center of the treatment experiment tank 201, and then seeps downward into the anaerobic denitrification layer laid on the right trapezoidal plate body composed of the inclined plate two 104 and the flat plate two 105 through the mesh one 103 provided on the flat plate one 102, so that the sewage treated by the aerobic nitrification layer is collected in the upper middle part of the treatment experiment tank 201 under the action of the inverted trapezoidal plate body composed of the inclined plate one 101 and the flat plate one 102, and then seeps downward into the anaerobic denitrification layer through the mesh one 103; The sewage seeping into the anaerobic denitrification layer promotes denitrification under the action of the special modified biochar filler, and further treats the sewage, and the sewage reacted and treated in the anaerobic denitrification layer falls on the inclined plate two 104, and the sewage located in the middle is divided into two sides through the two symmetrical inclined plate two 104 inclined downward from the vertical center of the experiment tank, and then the sewage is divided into two sides downward by the right trapezoidal plate body composed of the inclined plate two 104 and the flat plate two 105, and then seeps downward into the mineralization and adsorption layer through the mesh two 106 on the flat plate two 105 on the two sides; The sewage seeping into the mineralization and adsorption layer is dredged by the adsorption filler such as zeolite and steel slag, and further purifies the sewage, and the purified sewage flows on the U-shaped converging plate 107 in the mineralization and adsorption layer, and the sewage is re-converged to the bottom middle part of the U-shaped converging plate 107 through the U-shaped converging plate 107; S5, the purified sewage collected in the bottom middle part of the U-shaped converging plate 107 flows into the water outlet pipe 204, and then flows into the water collecting pipe group from the water outlet pipe 204, and then enters the inside of the water collecting tank through the water collecting pipe group, thereby realizing the treatment and purification of the sewage; S6, when the water distribution pipe 303 on the side of each processing experiment box 201 is watered, the control of the double-shaft motor 314 is operated so that the output shaft of the double-shaft motor 314 rotates forward and backward reciprocatingly, the output shaft of the double-shaft motor 314 drives the adjusting lead screw 313 connected therewith to rotate, and in the process of the adjusting lead screw 313 rotating forward and backward reciprocatingly, the two movable rods 312 on the sides are brought closer to each other or moved away from each other through the threaded relationship between the adjusting lead screw 313 and the movable rod 312, and then the two connecting blocks 310 on the sides are brought closer to each other or moved away from each other, and then the two water distribution pipes 303 on the sides of the processing experiment box 201 are brought closer to each other or moved away from each other, so that the water distribution pipe 303 moves horizontally and reciprocatingly in the process of watering, and then the floating plant filter bed can be quickly and uniformly watered; S7, in the process of the horizontal reciprocating movement of the water distribution pipe 303, when the gear 308 moves to contact the gear teeth group 307, the gear 308 rotates through the meshing relationship between the gear teeth group 307 and the gear 308, and since the gear teeth group 307 is uniformly spaced, when the gear 308 moves to the gap between the gear teeth group 307, the gear 308 rotates reversely under the action of gravity, so that the water outlet 304 on the lower side of the water distribution pipe 303 is perpendicular to the ground again, and then through the cooperation of the gear 308 and the gear teeth group 307, the water distribution pipe 303 can rotate forward and backward reciprocatingly in the process of horizontal reciprocating movement, so that the sewage can be quickly and uniformly sprayed on the floating plant filter bed.

[0023] In use, a plurality of processing experiment boxes 201 are placed in parallel in the reserved working area, and the bolts are inserted into the mounting holes 203 pre-formed on the four corners of the lower surface of the base 202, and then the processing experiment box 201 is fixed in position by rotating the bolts with an external tool, so that the modularization of the processing experiment boxes 201 arranged in parallel can form a whole constructed wetland sewage treatment experiment unit system; The mineralization adsorption layer (composed of zeolite, steel slag and other adsorption fillers) is laid on the U-shaped collector plate 107 at the lowermost layer, the uniform laying of the mineralization adsorption layer is facilitated by the evenly arranged partition plates three 110 on the two sides of the U-shaped collector plate 107, the anaerobic denitrification layer (composed of special modified biochar fillers) is laid on the right trapezoidal plate body composed of the inclined plate two 104 and the flat plate two 105 at the middle, the uniform laying of the anaerobic denitrification layer is facilitated by the evenly arranged partition plates two 109 on the two sides of the inclined plate two 104, the aerobic nitrification layer (composed of sand layer, gravel and broken stone) is laid on the inverted trapezoidal plate body composed of the inclined plate one 101 and the flat plate one 102 at the upper side, and then the water celery and other plants with extremely strong oxygen excretion ability are planted on the aerobic nitrification layer to form a floating plant filter bed; The water pump provided on the external water supply tank is connected with the water inlet valve 305 provided on each treatment experiment tank 201 through the water delivery pipe group, and then the water collecting pipe group provided on the water collecting tank is connected with the water outlet valve 205 provided on each treatment experiment tank 201, so that the water source in the external water supply tank is transported into the water distribution pipe 303 provided on each treatment experiment tank 201 through the water delivery pipe group under the action of the water pump, and the water is sprayed on the floating plant filter bed through the water outlet 304 provided on the water distribution pipe 303, so that the sewage is uniformly sprayed on the floating plant filter bed like fine rain; The sewage sprayed from the water distribution pipe 303 enters the aerobic nitrification layer from the floating plant filter bed, and in this process, the floating plant filter bed performs denitrification, pH adjustment and phosphorus removal; The sewage entering the aerobic nitrification layer is strengthened nitrification, and the sewage reacted in the aerobic nitrification layer continuously seeps down until it stays on the inclined plate one 101, and then flows to the flat plate one 102 located on the upper side of the vertical center of the treatment experiment tank 201 through the inclined plate one 101 inclined toward the vertical center of the treatment experiment tank 201, and then seeps downward into the anaerobic denitrification layer laid on the right trapezoidal plate body composed of the inclined plate two 104 and the flat plate two 105 through the mesh one 103 provided on the flat plate one 102, so that the sewage treated by the aerobic nitrification layer is collected in the upper middle part of the treatment experiment tank 201 under the action of the inverted trapezoidal plate body composed of the inclined plate one 101 and the flat plate one 102, and then seeps downward into the anaerobic denitrification layer through the mesh one 103; The sewage seeping into the anaerobic denitrification layer promotes denitrification reaction under the action of the special modified biochar filler, and further treats the sewage, and the sewage reacted and treated in the anaerobic denitrification layer falls on the inclined plate two 104, and the sewage located in the middle is divided into two sides through the two symmetrical inclined plate two 104 inclined downward from the vertical center of the experiment tank, and then the sewage is divided into two sides downward by the right trapezoidal plate body composed of the inclined plate two 104 and the flat plate two 105, and then seeps downward into the mineralization and adsorption layer through the mesh two 106 on the flat plate two 105 on both sides; The sewage seeping into the mineralization and adsorption layer dredges the substrate under the action of the adsorption filler such as zeolite and steel slag, and further purifies the sewage, and the purified sewage flows on the U-shaped converging plate 107 in the mineralization and adsorption layer, and the sewage is re-converged to the bottom middle part of the U-shaped converging plate 107 through the U-shaped converging plate 107; The purified sewage collected in the bottom middle part of the U-shaped converging plate 107 flows into the water outlet pipe 204, and then flows into the water collecting pipe group from the water outlet pipe 204, and then enters the inside of the water collecting tank through the water collecting pipe group, thereby realizing the treatment and purification of the sewage; When the water distribution pipe 303 on the side of each processing experiment box 201 is watered, the double-shaft motor 314 is controlled to rotate in the forward and reverse directions, so that the output shaft of the double-shaft motor 314 drives the adjusting screw rod 313 connected thereto to rotate, and in the process of the adjusting screw rod 313 rotating in the forward and reverse directions, the two movable rods 312 on the sides are moved towards each other or away from each other through the threaded relationship between the adjusting screw rod 313 and the movable rod 312, and then the two connecting blocks 310 on the sides are moved towards each other or away from each other, and then the two water distribution pipes 303 on the sides of the processing experiment box 201 are moved towards each other or away from each other, so that the water distribution pipe 303 moves horizontally and reciprocally in the process of watering, and then the floating plant filter bed can be quickly and uniformly watered. In the process of the water distribution pipe 303 moving horizontally and reciprocally, when the gear 308 moves to contact the gear teeth group 307, the gear 308 drives the water distribution pipe 303 where the gear 308 is located to rotate through the meshing relationship between the gear teeth group 307 and the gear 308. Since the gear teeth group 307 is uniformly spaced, when the gear 308 moves to the gap between the gear teeth group 307, the gear 308 rotates in the opposite direction under the action of gravity, so that the water outlet 304 on the lower side of the water distribution pipe 303 is perpendicular to the ground again, and then through the cooperation of the gear 308 and the gear teeth group 307, the water distribution pipe 303 can rotate in the forward and reverse directions in the process of moving horizontally and reciprocally, and the sewage can be quickly and uniformly sprayed on the floating plant filter bed.

[0024] The above is the preferred embodiment of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered within the scope of protection of the present application.

Claims

1. A modular wetland wastewater treatment experimental device, comprising a treatment experimental chamber (201), characterized in that: The processing test chamber (201) is equipped with a layered processing mechanism inside, which is used to perform auxiliary graded processing on the water flow. The layered processing mechanism includes an inclined plate 1 (101) symmetrically arranged on the upper side inside the processing experimental box (201), a flat plate 1 (102) arranged between the bottom ends of the inclined plate 1 (101), a mesh 1 (103) arranged in the middle of the flat plate 1 (102), an inclined plate 2 (104) symmetrically distributed in the middle of the interior of the processing experimental box (201), a flat plate 2 (105) arranged at the bottom end of the inclined plate 2 (104), a mesh 2 (106) arranged in the middle of the flat plate 2 (105), and a U-shaped busbar 107 arranged on the lower side inside the processing experimental box (201). The treatment experimental box (201) is also equipped with a rotating water distribution mechanism, which is used to distribute water to floating plants.

2. The modular wetland wastewater treatment experimental device as described in claim 1, characterized in that: The first inclined plate (101) is set on the inner walls of both sides of the processing test box (201) and tilted towards the vertical center of the processing test box (201). The second inclined plate (104) is set in the middle of the processing test box (201) and tilted towards the side wall of the processing test box (201) from the vertical center of the processing test box (201).

3. The modular wetland wastewater treatment experimental device as described in claim 1, characterized in that: The layered processing mechanism also includes a partition plate 1 (108) evenly spaced on the inclined plate 1 (101), a partition plate 2 (109) evenly spaced on the inclined plate 2 (104), and a plurality of partition plates 3 (110) evenly spaced on both sides of the U-shaped confluence plate (107). A plurality of drainage holes (111) are provided on the partition plate 1 (108), partition plate 2 (109) and partition plate 3 (110).

4. The modular wetland wastewater treatment experimental device as described in claim 1, characterized in that: The rotary water distribution mechanism includes two sliding rails (301) on the upper side of the treatment test chamber (201). Sliding blocks (302) are slidably arranged on both sides of the sliding rails (301). A water distribution pipe (303) is arranged between the sliding blocks (302) on the same side. Multiple water outlets (304) are arranged on the lower side of the water distribution pipe (303). Water inlet valves (305) are arranged at both ends of the water distribution pipe (303).

5. The modular wetland wastewater treatment experimental device as described in claim 4, characterized in that: The rotary water distribution mechanism also includes two fixed plates (306) set on the upper side of the treatment test box (201). Multiple tooth groups (307) are provided on both sides of the lower surface of the fixed plates (306). Gears (308) are provided on both sides of the outer arc surface of the water distribution pipe (303). The gears (308) are meshed with the tooth groups (307).

6. The modular wetland wastewater treatment experimental device as described in claim 4, characterized in that: The rotary water distribution mechanism also includes a fixed frame (309) set on the upper surface of the treatment test box (201). Connecting blocks (310) are slidably arranged on both sides of the fixed frame (309), and the connecting blocks (310) are connected and fixed to the water distribution pipe (303).

7. The modular wetland wastewater treatment experimental device and method as described in claim 6, characterized in that: A control seat (311) is provided on the upper side of the fixed frame (309). Movable rods (312) are slidably provided on both sides of the control seat (311). The ends of the movable rods (312) are connected and fixed to the connecting block (310). Adjusting screws (313) are rotatably provided on both sides inside the control seat (311). The adjusting screws (313) are threadedly connected to the adjacent movable rods (312). A dual-axis motor (314) is provided in the middle of the control seat (311). The output shaft of the dual-axis motor (314) is fixed to the adjacent adjusting screws (313) by a coupling.

8. The modular wetland wastewater treatment experimental device as described in claim 1, characterized in that: The lower side of the treatment test box (201) is provided with a water outlet pipe (204), and water outlet valves (205) are provided at both ends of the water outlet pipe (204). The water outlet (304) in the middle of the U-shaped manifold (107) is connected to the water outlet pipe (204). The bottom of the treatment test box (201) is provided with a base (202), and the four corners of the lower surface of the base (202) are provided with mounting holes (203).

9. A modular wetland wastewater treatment experimental method, characterized in that, The usage method is as follows: S1, multiple treatment test boxes (201) are neatly placed side by side in the reserved working area, and bolts are passed through the mounting holes (203) pre-drilled at the four corners of the lower surface of the base (202). Then, the bolts are tightened with external tools to fix the position of the treatment test boxes (201), so that the neatly arranged treatment test boxes (201) can be modularly assembled into a whole artificial wetland sewage treatment experimental unit system. S2, a mineralization adsorption layer (composed of zeolite, steel slag and other adsorption fillers) is laid on the U-shaped manifold (107) at the bottom. The uniform laying of the mineralization adsorption layer is facilitated by the partition plate three (110) evenly arranged on both sides of the U-shaped manifold (107). An anaerobic denitrification layer (composed of special modified biochar fillers) is laid on the trapezoidal plate body composed of inclined plate two (104) and flat plate two (105) in the middle. The uniform laying of the anaerobic denitrification layer is facilitated by the partition plate two (109) evenly arranged on both sides of the inclined plate two (104). An aerobic nitrification layer (composed of sand, gravel and crushed stone) is laid on the inverted trapezoidal plate body composed of inclined plate one (101) and flat plate one (102) on the upper side. Then, plants with strong oxygen secretion capacity such as water celery are planted on the aerobic nitrification layer to form a floating plant filter bed. S3, the water pump installed on the external water supply tank is connected to the inlet valve (305) installed on each treatment experimental box (201) through the water supply pipe group, and then the water collection pipe group installed on the water collection tank is connected to the outlet valve (205) installed on each treatment experimental box (201), so that the water source in the external water supply tank is transported into the water distribution pipe (303) installed on each treatment experimental box (201) through the water supply pipe group under the action of the water pump, and the sewage is evenly sprayed on the floating plant filter bed like a drizzle through the outlet (304) installed on the water distribution pipe (303); S4, wastewater sprayed from the water distribution pipe (303) enters the aerobic nitrification layer from the floating plant filter bed. During this process, the floating plant filter bed removes nitrogen, adjusts pH and removes phosphorus. Wastewater entering the aerobic nitrification layer undergoes enhanced nitrification. The wastewater reacted in the aerobic nitrification layer continuously seeps down until it remains on the inclined plate one (101). Then, it flows through the inclined plate one (101) tilted towards the vertical center of the treatment experimental tank (201) to the plate one (102) located on the upper side of the vertical center of the treatment experimental tank (201). Then, it seeps downward through the mesh one (103) set on the plate one (102) into the anaerobic denitrification layer laid on the trapezoidal plate body composed of the inclined plate two (104) and the plate two (105). This allows the wastewater treated by the aerobic nitrification layer to collect in the upper middle part of the treatment experimental tank (201) under the action of the inverted trapezoidal plate body composed of the inclined plate one (101) and the plate one (102). Then, it seeps downward into the anaerobic denitrification layer through the mesh one (103). Wastewater infiltrating into the anaerobic denitrification layer undergoes denitrification reaction under the action of special modified biochar packing, and is further treated. Wastewater treated by reaction in the anaerobic denitrification layer falls onto inclined plate two (104). The wastewater in the middle is diverted to both sides by two symmetrically distributed inclined plates two (104) tilted downward from the vertical center of the experimental box. Then, the wastewater is diverted downward to both sides by the trapezoidal plate body composed of inclined plate two (104) and plate two (105), and then seeps downward into the mineralization adsorption layer through the mesh two (106) on the plate two (105) on both sides. Wastewater that seeps into the mineralized adsorption layer is cleared by the adsorption fillers such as zeolite and steel slag, which further purify the wastewater. The purified wastewater in the mineralized adsorption layer flows onto the U-shaped confluence plate (107), and the wastewater is re-converged to the middle of the bottom of the U-shaped confluence plate (107) through the U-shaped confluence plate (107). S5, the purified sewage collected at the bottom center of the U-shaped manifold (107) flows into the outlet pipe (204), then flows from the outlet pipe (204) into the water collection pipe group, and then enters the interior of the water collection tank through the water collection pipe group, thereby realizing the purification of sewage treatment; S6, when water is distributed through the water distribution pipe (303) on the upper side of each treatment experimental box (201), the dual-axis motor (314) is controlled to run, so that the output shaft of the dual-axis motor (314) rotates back and forth. The output shaft of the dual-axis motor (314) drives the adjusting screw (313) connected to it to rotate. During the back and forth rotation of the adjusting screw (313), the thread relationship between the adjusting screw (313) and the movable rod (312) drives the movable rods (312) on both sides to move towards each other or away from each other, thereby driving the connecting blocks (310) on both sides to move towards each other or away from each other, thereby driving the water distribution pipes (303) on both sides of the treatment experimental box (201) to move towards each other or away from each other, so that the water distribution pipes (303) move horizontally back and forth during the watering process, thereby enabling rapid and uniform watering of the floating plant filter bed. S7, during the horizontal reciprocating movement of the water distribution pipe (303), when the gear (308) moves to contact the toothed assembly (307), the meshing relationship between the toothed assembly (307) and the gear (308) drives the water distribution pipe (303) where the gear (308) is located to rotate. Since the toothed assembly (307) is evenly spaced, when the gear (308) moves to the gap between the toothed assembly (307), the gear (308) rotates in the opposite direction under the action of gravity, so that the outlet (304) on the lower side of the water distribution pipe (303) is perpendicular to the ground again. Thus, through the cooperation between the gear (308) and the toothed assembly (307), the water distribution pipe (303) can rotate back and forth during the horizontal reciprocating movement, which can quickly, evenly and efficiently spray sewage onto the floating plant filter bed.

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