Micro-wetland construction process and its linkage treatment system

Abstract

The present application relates to sewage treatment technical field, especially to a kind of micro-wetland construction process, its steps are as follows: step one: setting sedimentation tank, water inlet pump station, double-channel processing path, root hole wetland+surface flow wetland, stabilization pond and water outlet pump station in sequence;Step two: double-channel processing path is divided into channel one and channel two;Step three: root hole wetland+surface flow wetland includes root hole wetland and surface flow wetland;Wherein root hole wetland is the semi-saturated flow wetland that reed straw mixes natural original soil is piled up;Surface flow wetland bottom is provided with submersible blower aeration system;Step four: stabilization pond is planted with emergent-leaves-submerged plant, and stabilization pond is put into filter-feeding fish and bottom-dwelling snail and mussel;Stabilization pond bottom is added phosphorus removal filler;The present application creates "small volume, big energy" small micro-wetland;Realize the directional efficient treatment to specific pollutant;According to demand reasonable water distribution;Through real-time data analysis and instruction transmission, realize water inlet diversion, water outlet and reflux control.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a micro-wetland construction process and its integrated treatment system. Background Technology

[0002] Constructed wetlands are an extension and enhancement of natural wetlands and are widely used in the purification and treatment of polluted water bodies. However, existing constructed wetland technologies have certain drawbacks and limitations: (1) Traditional constructed wetlands have low surface pollutant removal loads, so they require a large area to meet functional requirements, which limits the application of constructed wetlands; (2) Traditional constructed wetland fillers are prone to clogging, reducing their service life; (3) Wetland fillers are mostly traditional fillers such as volcanic rock, gravel, and ceramsite, which lack enhanced treatment capabilities; (4) Current wetland processes lack the setting of special treatment functional units and the ability to reasonably distribute water to different types of sewage; (5) The treatment processes of each functional area of ​​traditional wetlands are relatively independent, and there is a lack of linkage treatment scheduling capabilities between functional areas.

[0003] Therefore, in view of the shortcomings and limitations of the existing constructed wetland technologies, a high-efficiency micro-wetland construction process and its supporting integrated treatment system can be designed. Summary of the Invention

[0004] To overcome the problems of traditional constructed wetlands, such as large land area, low surface pollutant removal load, easy clogging of packing material, poor pollutant treatment capacity of packing material, lack of special treatment function units in wetland processes, lack of reasonable water distribution capacity for different types of sewage, and lack of coordinated treatment and scheduling capacity between functional areas.

[0005] The technical solution of this invention is: a micro-wetland construction process, the steps of which are as follows: Step 1: In an artificial wetland with an area of ​​less than 15,000 square meters, a sedimentation tank, an inlet pumping station, a dual-channel treatment path, a root-pore wetland + a surface flow wetland, a stabilization pond, and an outlet pumping station are set up in sequence; the bottom of the sedimentation tank is hardened and seepage-proofed; the inlet pumping station includes a first outlet well and a first lift pump, and the polluted water after sedimentation treatment flows into the dual-channel treatment path through the first lift pump; Step 2: The dual-channel treatment path is divided into Channel 1 and Channel 2; Channel 1 includes a rapid filtration device and a sheet phosphorus removal unit; Channel 2 includes a sponge purification system and a deep denitrification unit. The rapid filtration device in Channel 1 includes a pretreatment unit and a first main reaction unit. The pretreatment unit is equipped with a large-particle filter screen, and the first main reaction unit is equipped with porous lightweight granular filter media. A first sludge collection layer is set in the bottom space of the rapid filtration device. The rapid filtration device rapidly filters polluted water before it enters the main body of the wetland, efficiently filtering and separating suspended solids, algae, and a small amount of colloidal substances in the polluted water, reducing wetland clogging, and rapidly reducing COD of the polluted water. The layered phosphorus removal unit in Channel 1 is a flat rectangular gabion structure, with phosphorus removal functional packing and conventional graded granular material inside. The layered phosphorus removal units are arranged in a feather-like staggered pattern in the water. The entire layered phosphorus removal unit is submerged in the water. The sponge purification system in Channel 2 includes a microbial screening and cultivation unit and a second main reaction unit. The microbial screening and cultivation unit is equipped with biological ropes, and the second main reaction unit is equipped with denitrification functional composite materials. A second sludge collection and discharge layer is set in the bottom space of the sponge purification system. The functional filler in the sponge purification system can pre-purify pollutants in the water. At the same time, when the polluted water flows through the microbial carrier filler of the sponge purification system, it can carry functional bacteria to subsequent processes, reduce the total nitrogen in the polluted water, and help improve the surface pollutant removal load of the wetland. The deep denitrification unit in Channel 2 is a stepped subsurface flow wetland. The stepped subsurface flow wetland is equipped with autotrophic denitrification denitrification filler and conventional graded granular material. Step 3: Roothole wetland + surface flow wetland includes roothole wetland and surface flow wetland; the roothole wetland is a semi-saturated flow wetland made of reed straw mixed with natural soil; the surface flow wetland is equipped with a submerged blower aeration system at the bottom; Step 4: The stabilization pond is planted with emergent, floating-leaved, and submerged plants. Filter-feeding fish and benthic snails and clams are also introduced into the stabilization pond. Phosphorus removal filler is added to the bottom of the stabilization pond. The effluent pumping station includes a second effluent well and a second lift pump. After the polluted water is purified step by step through the micro-wetland, the water quality meets the standards and is discharged into the external water system through the second lift pump. If the water quality does not meet the standards, it is returned to the micro-wetland for further treatment through the second lift pump.

[0006] As a preferred option, the autotrophic denitrification packing material in the deep denitrification unit is a sulfur-iron autotrophic packing material.

[0007] As a preferred option, the volume ratio of reed stalks to natural soil is 1:5, and the diameter of the reed stalks is 0.3-1.2 cm and the length is 0.5-1.2 m.

[0008] As a preferred option, sedimentation tanks, channel one, channel two, root pore wetlands, surface flow wetlands, and stabilization ponds account for 4%–6%, 15%–20%, 10%–15%, 0.8%–1%, 35%–42%, and 18%–20% of the total area of ​​microwetlands, respectively.

[0009] The micro-wetland integrated treatment system includes the micro-wetland construction process described above, and also includes an equipment layer, an analysis and computing layer, and a cloud management layer. The equipment layer includes operating equipment and data acquisition equipment. The operating equipment includes pumps, valves, and blowers. The data acquisition equipment includes a first online water quality monitor, a first flow acquisition device, and a second flow acquisition device installed in the sedimentation tank, used to collect influent and water distribution data; a second online water quality monitor installed in the stabilization pond and a third flow acquisition device installed in the effluent pumping station, used to collect effluent data; and an online dissolved oxygen meter installed in the surface flow wetland area, used to collect dissolved oxygen content in the water. The equipment layer is used to collect influent and effluent water quality and quantity data, dissolved oxygen content in the micro-wetland system, and transmit the collected water data to the analysis and calculation layer of the integrated treatment system. The analysis and calculation layer includes pump station, valve, fan control module, and data processing module. This layer receives water quality, quantity, and dissolved oxygen data from the equipment layer, analyzes the data, generates corresponding processing signals, and sends these signals to the cloud management layer of the integrated processing system. It also receives instruction information from the cloud management layer and generates control signals based on these signals, which are then sent to the micro-wetland inlet and outlet pump station and water supply pipeline valve control system, as well as the submerged fan control system. The inlet pump station and water supply pipeline valve control system controls the water distribution volume of each channel in the micro-wetland based on the control signals. The outlet pump station and water supply pipeline valve control system controls the water outlet and return flow of the micro-wetland based on the control signals. The submerged fan control system controls the opening and closing of the aeration system based on the control signals.

[0010] The cloud management layer includes a cloud processor and a communication module; it is used to receive processing signals sent by the analysis and computing layer and generate instruction information based on the processing signals.

[0011] Preferably, the influent data includes influent water quality and quantity. The influent pumping station and water pipeline valve control system controls the water distribution of each channel of the micro-wetland based on control signals: when the total phosphorus concentration of the influent water is greater than the preset value and the total nitrogen concentration is less than the preset value, the influent pumping station and water pipeline valve control system activates the micro-wetland channel one water distribution over-allocation mode to efficiently remove total phosphorus from the water; when the total nitrogen concentration of the influent water is greater than the preset value and the total phosphorus concentration is less than the preset value, the influent pumping station and water pipeline valve control system activates the micro-wetland channel two water distribution over-allocation mode to efficiently remove total nitrogen from the water; when both the total nitrogen and total phosphorus concentrations of the influent water are less than the preset values, the influent pumping station and water pipeline valve control system activates the standard water distribution mode; when both the total nitrogen and total phosphorus concentrations of the influent water are greater than the preset values, the influent pumping station and water pipeline valve control system activates the channel two water distribution over-allocation mode, and phosphorus removal filler added to the bottom of the stabilization pond assists in phosphorus removal to ensure dual-effect removal of nitrogen and phosphorus.

[0012] As a preferred option, the standard water distribution mode refers to the water distribution of Channel 1 and Channel 2 accounting for 40% and 60% of the total water intake, respectively; the over-distribution mode of Channel 1 refers to the water distribution of Channel 1 and Channel 2 accounting for 55% and 45% of the total water intake, respectively; and the over-distribution mode of Channel 2 refers to the water distribution of Channel 1 and Channel 2 accounting for 30% and 70% of the total water intake, respectively.

[0013] As a preferred option, the effluent data includes effluent quality and quantity. The effluent pumping station and water pipeline gate valve control system control the micro-wetland effluent or recirculation based on control signals: when the effluent quality meets the design requirements, the effluent pumping station completes the compliant discharge according to the control signals; when the effluent quality does not meet the standards, the effluent pumping station recirculates the substandard wastewater to the sedimentation tank according to the control signals, and the influent pumping station treats the substandard wastewater again through dual-channel water distribution according to the control signals and water quality conditions until it meets the standards.

[0014] The beneficial effects of this invention are: 1. By increasing the surface pollutant removal load of wetlands, the application limitations of traditional wetland processes due to their large land area are overcome, creating "small-scale, high-energy" micro-wetlands; the introduction of rapid filtration devices and sponge purification systems solves the problem of easy clogging of traditional wetland fillers, preventing them from reaching their designed service life; specific functional fillers are added to achieve targeted and efficient treatment of specific pollutants; combined with the application of specific functional fillers, special functional units and multi-channel treatment systems are designed to achieve reasonable water distribution on demand; an intelligent linkage scheduling system is introduced to achieve influent diversion, effluent and reflux control through real-time data analysis and command transmission. 2. By setting up a rapid filtration device and a sponge purification system at the front end of the wetland body, the polluted water is rapidly filtered and preliminarily purified before entering the wetland body. The suspended solids, algae and a small amount of colloidal substances in the polluted water are efficiently filtered and separated. The functional packing in the equipment can preliminarily purify the pollutants in the water and improve the treatment efficiency. At the same time, when the polluted water flows through the microbial carrier packing in the sponge purification system, it can carry functional bacteria to the subsequent process, thereby reducing the blockage of the wetland body, rapidly reducing COD and total nitrogen in the polluted water, and helping to improve the removal load of pollutants on the surface of the wetland. 3. The micro-wetland process is set up with a dual-channel treatment path. In addition to the functions of traditional wetland processes, each channel forms a channel with enhanced phosphorus removal function and a channel with deep denitrification function through the application of new phosphorus removal materials and self-nutritive denitrification packing. The water distribution of each channel can be reasonably set according to the different concentrations of pollutants in the influent to achieve efficient removal of various pollutants and improve the surface pollutant removal load of the micro-wetland. 4. Set up an intelligent linkage scheduling system to control the operation of the micro wetland equipment layer through data collection, real-time data analysis and command transmission, so as to realize the on-demand diversion of influent, efficient dual-channel linkage treatment, real-time regulation of effluent and return, and intelligent operation of the wetland system. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic representation of the micro-wetland structure of the present invention. Figure 2 The diagram shown is a schematic representation of the micro-wetland integrated treatment system of the present invention. Figure 3 The diagram shows a schematic diagram of the structure of the sheet phosphorus removal unit in the micro-wetland of the present invention, wherein (a) is a three-dimensional structural schematic diagram; (b) is a cross-sectional structural schematic diagram of the sheet phosphorus removal unit; and (c) is a schematic diagram of the layout of the sheet phosphorus removal unit. Figure 4 The diagram shown is a cross-sectional structural diagram of the deep denitrification unit in the micro-wetland of the present invention.

[0016] Explanation of reference numerals in the attached diagram: 1. Sedimentation tank; 2. Inlet pumping station; 3. Rapid filtration device; 4. Layered phosphorus removal unit; 42. Phosphorus removal functional packing; 5. Sponge purification system; 6. Deep denitrification unit; 61. Autotrophic denitrification packing; 62. Stepped subsurface flow wetland; 7. Root-pore wetland + surface flow wetland; 8. Stabilization pond; 9. Outlet pumping station. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0018] When the wetland influent concentrations are 40 < Cod ≤ 80 mg / L, 0.4 < Total Phosphorus ≤ 2 mg / L, and 2 < Total Nitrogen ≤ 8 mg / L (with preset values ​​of 2 mg / L for total phosphorus and 8 mg / L for total nitrogen), the data acquisition equipment in sedimentation tank 1 transmits the collected total nitrogen and total phosphorus concentrations to the analysis and calculation layer of the integrated treatment system. The analysis and calculation layer comprehensively analyzes and processes the data collected from the field equipment and the preset system values, generating a processing signal which is then sent to the cloud management layer. The cloud management layer, according to the pre-set system program, issues instructions to the pump station, valve, and blower control modules of the analysis and calculation layer. The fan control module transmits control signals to start and stop the water pump and valves of each pipeline. When the total nitrogen and total phosphorus concentrations of the influent are both less than the preset values, the linkage treatment system instructs the influent pump station 2 and the water supply pipeline valve control system to execute the standard water distribution mode. The standard water distribution mode means that the water distribution of channel one and channel two accounts for 40% and 60% of the total influent, respectively. Under such circumstances, the micro wetland process and its linkage treatment system involved in this invention improve the total phosphorus removal rate by 25% to 35%, the total nitrogen removal rate by 20% to 30%, and the COD removal rate by more than 50% compared with the traditional wetland process, and improve the surface pollutant removal load by more than 30% compared with the traditional wetland process. Example

[0019] When the wetland influent concentration is 40 < Cod ≤ 80 mg / L, 2 mg / L < total phosphorus, and 2 < total nitrogen ≤ 8 mg / L (with a pre-set value of 2 mg / L for total phosphorus and 8 mg / L for total nitrogen), the data acquisition equipment in sedimentation tank 1 transmits the collected total nitrogen and total phosphorus concentrations to the analysis and calculation layer of the integrated treatment system. The analysis and calculation layer comprehensively analyzes and processes the data collected by the field equipment and the pre-designed system values, generating a processing signal which is then sent to the cloud management layer. The cloud management layer, according to the pre-set system program, issues instructions to the pump station, valve, and fan control modules of the analysis and calculation layer. These modules transmit control signals to start and stop the pumps and valves on each pipeline. If the total phosphorus concentration in the influent exceeds the pre-set value... If the total nitrogen concentration is less than the preset value, the linkage treatment system instructs the influent pump station 2 and the water supply pipeline valve control system to execute the channel 1 water distribution over-allocation mode. The channel 1 water distribution over-allocation mode means that the water distribution of channel 1 and channel 2 accounts for 55% and 45% of the total influent, respectively. In this case, because the total phosphorus in the influent exceeds the preset value, channel 1 is equipped with a sheet phosphorus removal unit 4. The sheet phosphorus removal unit 4 is equipped with phosphorus removal functional packing 42 to enhance the removal of total phosphorus in the sewage. This can increase the total phosphorus removal rate of the channel 1 water distribution over-allocation mode of the micro wetland process and its linkage treatment system involved in this invention by 12% to 18% compared with the standard water distribution mode, while the total nitrogen removal rate is basically the same (-2% to 1%), and the COD removal rate remains unchanged. Example

[0020] When the wetland influent concentrations are 40 < Cod ≤ 80 mg / L, 0.4 < Total Phosphorus ≤ 2 mg / L, and 8 mg / L < Total Nitrogen (with preset values ​​of 2 mg / L for total phosphorus and 8 mg / L for total nitrogen), the data acquisition equipment in sedimentation tank 1 transmits the collected total nitrogen and total phosphorus concentrations to the analysis and calculation layer of the integrated treatment system. The analysis and calculation layer comprehensively analyzes the data collected from the field equipment and the preset system values, generating a processing signal which is then sent to the cloud management layer. The cloud management layer, according to the pre-set system program, issues instructions to the pump station, valve, and fan control modules of the analysis and calculation layer. These modules then transmit control signals to start and stop the pumps and various pipelines. When the total nitrogen concentration in the influent exceeds the preset value and the total phosphorus concentration is less than the preset value, the linkage treatment system instructs the influent pump station 2 and the valve control system of the water supply pipeline to execute the channel 2 water distribution over-allocation mode. The channel 2 water distribution over-allocation mode means that the water distribution of channel 1 and channel 2 accounts for 30% and 70% of the total influent, respectively. In this case, because the total nitrogen in the influent exceeds the preset value, channel 2 is equipped with a deep denitrification unit 6 to enhance the removal of total nitrogen in the sewage. This can increase the total nitrogen removal rate by 8% to 12% and slightly reduce the total phosphorus removal rate by 2% to 3% compared with the standard water distribution mode of the micro wetland process and its linkage treatment system involved in this invention, while keeping the COD removal rate unchanged. Example

[0021] When the wetland influent concentrations are 80 mg / L < Cod, 2 mg / L < Total Phosphorus, and 8 mg / L < Total Nitrogen (with preset values ​​of 2 mg / L for Total Phosphorus and 8 mg / L for Total Nitrogen), the data acquisition equipment in sedimentation tank 1 transmits the collected total nitrogen and total phosphorus concentrations to the analysis and calculation layer of the integrated treatment system. The analysis and calculation layer comprehensively analyzes and processes the data collected from the field equipment and the preset system values, generating a processing signal which is then sent to the cloud management layer. The cloud management layer, according to the pre-set system program, issues instructions to the pump station, valve, and fan control modules of the analysis and calculation layer. The transmission control signal starts and closes the water pump and valves of each pipeline. When the total nitrogen and total phosphorus concentrations of the influent are both less than the preset values, the linkage treatment system instructs the influent pump station 2 and the valve control system of the water delivery pipeline to execute the standard water distribution mode. The standard water distribution mode means that the water distribution of channel one and channel two accounts for 40% and 60% of the total influent, respectively. Under such circumstances, the micro wetland process and its linkage treatment system involved in this invention improve the total phosphorus removal rate by 35% to 40%, the total nitrogen removal rate by 15% to 20%, and the COD removal rate by more than 55% compared with the traditional wetland process. The overall surface pollutant removal load is improved by more than 32% compared with the traditional wetland process. Example

[0022] Based on Examples 1-4, the wetland integrated treatment system sets the effluent COD, total nitrogen, and total phosphorus indicators to the corresponding data for Class III surface water. After the micro-wetland influent undergoes stepwise purification, the data acquisition equipment in stabilization pond 8 transmits the collected effluent water quality indicators to the analysis and calculation layer of the integrated treatment system. The analysis and calculation layer comprehensively analyzes and processes the indicators collected by the field equipment and the system-set Class III surface water quality indicators to generate a treatment signal. At this point, when the wastewater treatment meets the Class III surface water requirements, the analysis and calculation layer generates a compliant discharge treatment signal and sends it to the cloud management layer. The cloud management layer, according to the system's pre-set program, issues instructions to the pump station, valve, and blower control modules of the analysis and calculation layer; the pump station, valve... The blower control module transmits control signals to start the effluent pump and valves to perform drainage. When the sewage treatment does not meet the Class III surface water requirements, the analysis and calculation layer generates a treatment signal for compliant discharge and sends it to the cloud management layer. The cloud management layer issues instructions to the pump station, valve, and blower control modules of the analysis and calculation layer according to the pre-set program. The pump station, valve, and blower control modules transmit control signals to start the effluent pump and valves to perform the return of substandard water to the micro-wetland sedimentation tank 1. Based on the type and specific concentration of the exceeding indicators, and according to the execution standards of Examples 1-4, the micro-wetland linkage treatment system coordinates and links channels one and two in the wetland process to perform the treatment task until the polluted water meets the discharge standards.

[0023] Through the above steps, the application limitations of traditional wetland processes, such as large land area, are overcome by increasing the surface pollutant removal load, creating "small-scale, high-energy" micro-wetlands. The introduction of rapid filtration devices and sponge purification systems addresses the problem of traditional wetland fillers being prone to clogging and failing to reach their designed service life. Specific functional fillers are added to achieve targeted and efficient treatment of specific pollutants. Combined with the application of these specific functional fillers, special functional units and multi-channel treatment systems are designed to achieve rational water distribution on demand. An intelligent linkage scheduling system is introduced, using real-time data analysis and command transmission to control influent flow, effluent, and return flow, thus solving the problems of large land area and lack of coordinated treatment and scheduling capabilities between functional zones.

[0024] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A micro-wetland construction process, characterized in that, The steps are as follows: Step 1: In an artificial wetland with an area of ​​less than 15,000㎡, a sedimentation tank (1), an inlet pumping station (2), a dual-channel treatment path, a root-hole wetland + surface flow wetland (7), a stabilization pond (8), and an outlet pumping station (9) are set up in sequence; the bottom of the sedimentation tank (1) is hardened and seepage-proofed; the inlet pumping station (2) includes a first outlet well and a first lift pump, and the polluted water after sedimentation treatment flows into the dual-channel treatment path through the first lift pump; Step 2: The dual-channel processing path is divided into Channel 1 and Channel 2; Channel 1 includes a rapid filtration device (3) and a sheet phosphorus removal unit (4); Channel 2 includes a sponge purification system (5) and a deep denitrification unit (6). The rapid filtration device (3) in Channel 1 includes a pretreatment unit and a first main reaction unit; the pretreatment unit is equipped with a large particle filter screen, and the first main reaction unit is equipped with porous lightweight granular filter media; the bottom space of the rapid filtration device (3) is equipped with a first sludge collection layer; the rapid filtration device (3) rapidly filters the polluted water before it enters the main body of the wetland, efficiently filters and separates suspended solids, algae and a small amount of colloidal substances in the polluted water, reduces wetland blockage, and rapidly reduces COD of the polluted water; the layered phosphorus removal unit (4) in Channel 1 is a flat rectangular gabion structure, which is equipped with phosphorus removal functional filler (42) and conventional graded granular material inside; the layered phosphorus removal unit (4) is arranged in a feather-like staggered pattern in the water; the layered phosphorus removal unit (4) is completely submerged in the water; The sponge purification system (5) in Channel 2 includes a microbial screening and cultivation unit and a second main reaction unit; the microbial screening and cultivation unit is equipped with a biological rope, and the second main reaction unit is equipped with a denitrification functional composite material; the bottom space of the sponge purification system (5) is equipped with a second sludge collection layer; the functional filler in the sponge purification system (5) will perform preliminary purification of pollutants in the water, and at the same time, when the polluted water flows through the microbial carrier filler of the sponge purification system (5), it will carry functional bacteria to the subsequent process, reduce the total nitrogen in the polluted water, and help improve the removal load of pollutants on the surface of the wetland; the deep denitrification unit (6) in Channel 2 is a stepped subsurface flow wetland (62), and the stepped subsurface flow wetland (62) is equipped with an autotrophic denitrification denitrification filler (61) and conventional graded granular material; Step 3: Roothole wetland + surface flow wetland (7) includes roothole wetland and surface flow wetland; among which, the roothole wetland is a semi-saturated flow wetland made of reed straw mixed with natural soil; the bottom of the surface flow wetland is equipped with a submerged blower aeration system; Step 4: The stabilization pond (8) is planted with emergent-floating-submerged plants and filter-feeding fish and benthic snails and clams. Phosphorus removal filler is added to the bottom of the stabilization pond (8). The effluent pumping station (9) includes a second effluent well and a second lift pump. After the polluted water is purified step by step by the micro-wetland, the water quality meets the standards and is discharged into the external water system by the second lift pump. If the water quality does not meet the standards, it is returned to the micro-wetland for further treatment by the second lift pump. This technology is applied in a micro-wetland integrated treatment system, which includes an equipment layer, an analysis and computing layer, and a cloud management layer. The equipment layer includes operating equipment and data acquisition equipment. The operating equipment includes pumps, valves and blowers. The data acquisition equipment includes a first online water quality monitor, a first flow acquisition device and a second flow acquisition device installed in the sedimentation tank (1) and the water inlet pump station (2), which are used to collect water inlet and water distribution data. The second online water quality monitoring instrument installed in the stabilization pond (8) and the third flow acquisition device installed in the effluent pumping station (9) are used to collect effluent data; The online dissolved oxygen meter, installed in the surface flow wetland area, is used to collect the dissolved oxygen content of the water. The equipment layer is used to collect the water quality and quantity data of the influent and effluent of the micro wetland system, as well as the dissolved oxygen content of the water, and transmits the collected water data to the analysis and calculation layer of the linkage treatment system. The analysis and calculation layer includes a pump station, valve, fan control module and a data processing module; the analysis and calculation layer is used to receive water quality, water quantity and dissolved oxygen data transmitted from the equipment layer, analyze the data, generate corresponding processing signals, and send the processing signals to the cloud management layer of the linkage processing system; it is also used to receive instruction information transmitted from the cloud management layer, and generate control signals according to the instruction information and send them to the micro wetland inlet and outlet pump station (9) and water conveying pipeline valve control system, and submersible fan control system; the inlet pump station (2) and water conveying pipeline valve control system control the water distribution volume of each channel of the micro wetland based on the control signals; the outlet pump station (9) and water conveying pipeline valve control system control the water discharge and return of the micro wetland based on the control signals; the submersible fan control system controls the opening and closing of the aeration system based on the control signals; The cloud management layer includes cloud processors and communication modules; It is used to receive processing signals sent by the analysis and computing layer and generate instruction information based on the processing signals.

2. The micro-wetland construction process according to claim 1, characterized in that: The autotrophic denitrification packing (61) in the deep denitrification unit (6) is a sulfur-iron autotrophic packing.

3. The micro-wetland construction process according to claim 2, characterized in that: The volume ratio of reed stalks to natural soil is 1:

5. The diameter of the reed stalks is 0.3-1.2 cm and the length is 0.5-1.2 m.

4. The micro-wetland construction process according to claim 3, characterized in that: Sedimentation tank (1), Channel 1, Channel 2, Root hole wetland, Surface flow wetland and stabilization pond (8) account for 4% to 6%, 15% to 20%, 10% to 15%, 0.8% to 1%, 35% to 42% and 18% to 20% of the total area of ​​micro-wetland, respectively.

5. The micro-wetland construction process according to claim 1, characterized in that: The influent data includes influent water quality and quantity. The influent pump station (2) and the water supply pipeline valve control system control the water distribution of each channel of the micro-wetland based on control signals: when the total phosphorus concentration of the influent water quality is greater than the preset value and the total nitrogen concentration is less than the preset value, the influent pump station (2) and the water supply pipeline valve control system open the micro-wetland channel one water distribution over-distribution mode to efficiently remove total phosphorus from the water; when the total nitrogen concentration of the influent water quality is greater than the preset value and the total phosphorus concentration is less than the preset value, the influent pump station (2) and The water supply pipeline valve control system opens the micro-wetland channel secondary water distribution over-allocation mode to efficiently remove total nitrogen from the water body; when the total nitrogen and total phosphorus concentrations of the influent are both less than the preset values, the influent pump station (2) and the water supply pipeline valve control system open the standard water distribution mode; when the total nitrogen and total phosphorus concentrations of the influent are both greater than the preset values, the influent pump station (2) and the water supply pipeline valve control system open the channel secondary water distribution over-allocation mode, and the phosphorus removal packing added to the bottom of the stabilization pond (8) assists in phosphorus removal to ensure the dual removal of nitrogen and phosphorus.

6. The micro-wetland construction process according to claim 1, characterized in that: The standard water distribution mode means that the water distribution of Channel 1 and Channel 2 accounts for 40% and 60% of the total water intake, respectively; the over-distribution mode of Channel 1 means that the water distribution of Channel 1 and Channel 2 accounts for 55% and 45% of the total water intake, respectively; and the over-distribution mode of Channel 2 means that the water distribution of Channel 1 and Channel 2 accounts for 30% and 70% of the total water intake, respectively.

7. The micro-wetland construction process according to claim 1, characterized in that: The effluent data includes effluent quality and quantity. The effluent pump station (9) and the gate valve control system of the water transmission pipeline control the micro-wetland effluent or return based on the control signal: when the effluent quality meets the design requirements, the effluent pump station (9) completes the standard discharge according to the control signal; when the effluent quality does not meet the standard, the effluent pump station (9) returns the substandard sewage to the sedimentation tank (1) according to the control signal, and the inlet pump station (2) treats the substandard sewage again through dual channels according to the control signal and water quality status until it meets the standard.

Images