Ecological parking lot combining ecological wetland treatment of parking lot rainwater

Abstract

The application relates to the technical field of ecological parking lots, and discloses an ecological parking lot combining with an ecological wetland to treat rainwater of the parking lot, which comprises a parking lot, a treatment unit, an artificial wetland unit and an adsorption unit; the parking lot is used for parking vehicles and provides an infiltration and treatment space for rainwater runoff; the treatment unit is laid on the ground of the parking lot and is used for intercepting and pretreating the rainwater runoff; the artificial wetland unit is arranged at the bottom of the treatment unit and is used for biologically strengthening the infiltrated rainwater; the adsorption unit is installed on the surface of the parking lot and is used for deeply purifying the treated rainwater and recycling the rainwater; a paving layer group realizes photocatalytic degradation of organic matters in the rainwater and absorption of nitrogen and phosphorus nutrients; a rainwater interception layer is used for step-by-step interception and a filter cake layer is used for collaborative filtration, so that step-by-step efficient interception of suspended matters such as tire wear particles is realized, and the problem that a traditional parking lot cushion is not water permeable, resulting in water accumulation and vegetation death, is solved.

Description

Technical Field

[0001] This invention relates to the field of ecological parking technology, specifically to an ecological parking lot that combines ecological wetlands to treat rainwater from parking lots. Background Technology

[0002] With the acceleration of urbanization, the area of ​​impervious surfaces has increased significantly, leading to increased rainwater runoff and increasingly prominent runoff pollution problems. Parking lots, as one of the important impervious surfaces in cities, have surface sediments rich in tire wear particles, heavy metals, oils, and organic pollutants. Among them, tire wear particles and their oxidation product 6PPD-quinone have potential toxicity to the aquatic ecosystem and have become a new focus of urban rainwater pollution control.

[0003] However, existing technologies still have the following shortcomings: the parking lot subbase is mostly made of monolithic concrete, and the impermeable subbase prevents rainwater from seeping in, which easily leads to surface water accumulation on rainy days. At the same time, the impermeability of the subbase causes water to accumulate in the gaps of the grass pavers on the upper layer, causing the planted green plants to die due to lack of oxygen, thus reducing ecological benefits. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an ecological parking lot that combines ecological wetlands to treat rainwater. It has the advantages of easy maintenance and solves the problems of water accumulation and vegetation death caused by the impermeability of the ecological parking lot's subfloor.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: an ecological parking lot that combines ecological wetland treatment of rainwater from a parking lot, comprising a parking lot, including: A treatment unit is laid on the parking lot ground. The treatment unit includes a pavement layer assembly and a rainwater interception layer. The pavement layer assembly is located above the treatment unit, and the rainwater interception layer is located below the pavement layer assembly. An artificial wetland unit is located at the bottom of the treatment unit. The artificial wetland unit includes, from top to bottom, a cold-resistant bacteria enrichment zone, a carbon source slow-release layer, and a water collection layer group along the water flow direction. The cold-resistant bacteria enrichment zone is located at the bottom of the rainwater interception layer. An adsorption unit is installed on the surface of a parking lot. The adsorption unit includes a purification component located on one side of the pavement layer assembly, and a circulation component is provided on one side of the purification component. When rainwater flows through the pavement layer, the organic matter in the rainwater is photocatalytically degraded on the surface of the pavement layer. After the rainwater intercepts particulate matter in the rainwater interception layer, it infiltrates into the constructed wetland unit. In the cold-resistant bacteria enrichment zone, the rainwater comes into contact with the cold-resistant bacteria compound agent, and the organic matter is biodegraded. After further denitrification and nitrogen removal in the carbon source slow release layer, it flows into the water collection layer. The purified water in the water collection layer undergoes deep treatment through the adsorption unit and is recycled.

[0006] Preferably, the paving layer includes a permeable base layer, on which a groove is provided. The groove is filled by multiple grass-embedded bricks in sequence. The surface of the grass-embedded bricks is loaded with nano-titanium dioxide photocatalytic material. Each grass-embedded brick has holes, and each hole is filled with planting substrate and planted with trampling-resistant herbaceous plants. When rainwater flows over the surface of the grass-embedded bricks, the nano-titanium dioxide photocatalytic material oxidizes and degrades the organic pollutants in the rainwater under sunlight. At the same time, the trampling-resistant herbaceous plants planted in the holes of the grass-embedded bricks absorb the nitrogen and phosphorus nutrients in the rainwater, thereby reducing the pollution of rainwater runoff at its source.

[0007] Preferably, the nano-titanium dioxide photocatalytic material is loaded at high density on the surface of the grass-embedded brick, and the rainwater interception layer includes a first-stage screen, a second-stage screen, and a third-stage screen arranged sequentially along the rainwater infiltration direction; The system uses a first-stage screen to intercept coarse particles, a second-stage screen to intercept medium-sized particles, and a third-stage screen to intercept fine particles. There are gaps between the screens at each stage, which allows the intercepted particles to gradually form a filter cake layer on the upper surface of each screen. This tiered filtration method effectively removes suspended particles from rainwater.

[0008] Preferably, the cold-resistant bacteria enrichment zone is filled with a mixed filler of biochar and volcanic rock, the biochar is fixed with a composite inoculant of cold-resistant bacteria, and the carbon source slow-release layer is filled with a mixture of sawdust and straw. When rainwater infiltrates into the cold-resistant bacteria enrichment area, the cold-resistant bacteria compound inoculant biodegrades the organic matter in the rainwater under low-temperature conditions. The degraded rainwater then enters the carbon source slow-release layer, where wood chips and straw slowly release carbon sources under the action of microorganisms.

[0009] Preferably, the water collection layer group includes a water collection tank, and a load-bearing beam is fixed inside the water collection tank, with the top of the load-bearing beam supporting the carbon source slow-release layer. Multiple load-bearing beams are arranged in parallel at intervals at the top opening of the water collection tank. The upper surface of the load-bearing beams is in contact with the lower surface of the carbon source slow-release layer. The load-bearing beams provide structural support for the carbon source slow-release layer and the overlying filler layer. At the same time, the gaps between adjacent load-bearing beams form a flow channel for rainwater to flow into the water collection tank, allowing the purified water treated by the artificial wetland unit to flow into the water collection tank through the flow channel under the action of gravity.

[0010] Preferably, the purification component includes a cabinet, on which a first pump is fixed. The input end of the first pump is connected to a water collection tank through a first pipe, which is buried in the ground base of the parking lot. The output end of the first pump is fixed to an adsorption filter tank through a second pipe, which is fixed inside the cabinet. The output end of the adsorption filter tank is connected to the input end of an advanced oxidation reactor. The first pump lifts the purified water from the collection tank to the adsorption filter tank. After the residual organic matter is removed by the adsorption filter tank, the water enters the advanced oxidation reactor, where it undergoes deep oxidation and degradation of the recalcitrant organic matter in the water under ultraviolet light irradiation.

[0011] Preferably, the circulation component includes a water tank, a second pump is built into the water tank, and the water tank is connected to a spray pipe through a third pipe, with a plurality of spray heads arranged at intervals on the spray pipe; The purified water, after being deeply treated by the advanced oxidation reactor, is temporarily stored in a water tank. The purified water in the water tank is then pumped by the second pump and transported to the spray pipe through the third pipe. It is then sprayed out in a mist form through the spray head to spray the parking lot for dust suppression and greening irrigation.

[0012] Preferably, the water tank is connected to the outlet of the advanced oxidation reactor via a fourth pipe. The fourth tube transports the purified water treated by the advanced oxidation reactor to the water tank for storage. The fourth tube is fixed to the outer wall of the cabinet to provide structural fixation and protection for the fourth tube.

[0013] Preferably, the fourth tube is fixed to the cabinet and has a control valve inside. The control valve is electrically connected to a control unit, which is fixed to the outer wall of the advanced oxidation reactor. The control unit is used to collect the water quality parameters of the purified water at the outlet of the advanced oxidation reactor, and send a switch control command to the control valve according to the water quality parameters to adjust the flow of purified water from the fourth pipe to the water tank. When the water quality parameters meet the reuse standard, the control valve opens and the purified water enters the water tank through the fourth pipe for temporary storage.

[0014] Preferably, the parking lot includes a ground layer, on which a ground surface is laid, and protective intervals are provided at intervals on the ground surface. A cold-resistant bacteria replenishment and injection pipe is also provided below the ground surface. One end of the cold-resistant bacteria replenishment and injection pipe is connected to the cold-resistant bacteria enrichment area of ​​the artificial wetland unit, and the other end protrudes from the ground surface or is flush with the ground surface. The cold-resistant bacteria replenishment injection pipe is buried between the ground surface and the cold-resistant bacteria enrichment area. By periodically injecting cold-resistant bacteria solution into the cold-resistant bacteria replenishment injection pipe, the cold-resistant bacteria compound agent in the cold-resistant bacteria enrichment area is replenished and renewed.

[0015] (III) Beneficial Effects Compared with existing technologies, this invention provides an ecological parking lot that combines ecological wetlands to treat rainwater, which has the following beneficial effects: 1. This ecological parking lot, which combines ecological wetland treatment of rainwater, sets up a pavement layer group and a rainwater interception layer in the treatment unit. The pavement layer group realizes the photocatalytic degradation of organic matter in rainwater and the absorption of nitrogen and phosphorus nutrients. The rainwater interception layer intercepts in stages and filters in synergy with the filter cake layer, realizing the efficient interception of suspended matter such as tire wear particles in stages, solving the problem of water accumulation and vegetation death caused by the impermeability of the traditional parking lot subfloor. 2. This ecological parking lot, which combines ecological wetland treatment of rainwater, sets up a cold-resistant bacteria enrichment zone and a carbon source slow-release layer in the artificial wetland unit. The cold-resistant bacteria enrichment zone uses a cold-resistant bacteria compound agent, which can maintain high organic matter degradation activity under low temperature conditions. The carbon source slow-release layer slowly releases carbon source through wood chips and straw, providing electron donors for denitrifying bacteria. This achieves simultaneous and efficient removal of organic matter and nitrate nitrogen from rainwater in the cold season, ensuring the stability of the system's operation throughout the year. 3. This ecological parking lot, which combines ecological wetland treatment of parking lot rainwater, uses an adsorption filter tank and an advanced oxidation reactor in the adsorption unit. The adsorption filter tank is filled with modified biochar or zeolite to adsorb and intercept dissolved 6PPD-quinone. The advanced oxidation reactor uses ultraviolet light to activate periodate to generate highly oxidizing active species, which deeply oxidize and decompose the remaining 6PPD-quinone. The series combination of adsorption and oxidation effectively avoids the risk of pollutant re-release in single processes and achieves targeted deep removal of new pollutants. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is an exploded view of the processing unit and artificial wetland unit structure of the present invention.

[0018] Figure 3 This is an exploded view of the processing unit structure of the present invention.

[0019] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0020] Figure 5 This is an exploded view of the artificial wetland unit structure of the present invention.

[0021] Figure 6 This is a schematic diagram of the adsorption unit structure of the present invention.

[0022] Figure 7 This is a schematic cross-sectional view of the purification component structure of the present invention.

[0023] Figure 8 This is a schematic diagram of the parking lot structure according to the present invention.

[0024] In the diagram: 100, Parking lot; 110, Ground layer; 111, Ground surface; 112, Protective partition; 200, Treatment unit; 210, Pavement layer group; 211, Permeable base layer; 212, Grass-embedded brick; 220, Rainwater interception layer; 300, Constructed wetland unit; 310, Cold-resistant bacteria enrichment zone; 320, Carbon source slow-release layer; 330, Water collection layer group; 331, Water collection tank; 332, Load-bearing beam; 400, Adsorption unit; 410, Purification component; 411, Cabinet; 412, Adsorption filter tank; 413, Advanced oxidation reactor; 420, Circulation component; 421, Water tank; 422, Spray pipe; 423, Spray head. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] Please see Figure 1-8 This invention discloses an ecological parking lot that combines ecological wetland treatment of rainwater from a parking lot, comprising a parking lot 100, a treatment unit 200, an artificial wetland unit 300, and an adsorption unit 400. The parking lot 100 is used to park vehicles and provides space for the infiltration and treatment of rainwater runoff. The treatment unit 200 is laid on the ground of the parking lot 100 and is used to intercept and pre-treat rainwater runoff at its source. The artificial wetland unit 300 is located at the bottom of the treatment unit 200 and is used to perform biological enhancement treatment on the infiltrated rainwater. The adsorption unit 400 is installed on the surface of the parking lot 100 and is used to deeply purify the treated rainwater and recycle it. Furthermore, in the long-term operation of existing ecological parking lots, the parking lot sub-base is mostly made of monolithically poured concrete. The impermeable sub-base prevents rainwater infiltration, which easily leads to surface water accumulation on rainy days. At the same time, the impermeability of the sub-base causes water to accumulate in the gaps of the grass pavers on the upper layer, causing the planted green plants to die due to lack of oxygen, thus reducing ecological benefits. In addition, existing technologies lack targeted removal methods for emerging pollutants such as tire wear particles and 6PPD-quinone in the rainwater runoff of parking lots. like Figure 3 and Figure 4 As shown, the treatment unit 200 includes a pavement layer assembly 210 and a rainwater interception layer 220. The pavement layer assembly 210 includes a permeable base layer 211, which is laid on the ground base layer of the parking lot 100. The permeable base layer 211 has a groove, which is filled with multiple grass-embedded bricks 212 sequentially. The surface of the grass-embedded bricks 212 is loaded with nano-titanium dioxide photocatalytic material. During rainfall, rainwater washes away the photocatalytic products attached to the surface of the pavement layer assembly 210, and simultaneously carries away tire wear particles and 6PPD-quinone accumulated on the surface of the parking lot 100, all of which infiltrate into the next treatment unit through the grass-embedded bricks 212. The grass-embedded bricks 212 employ a high-density surface layer and a low-density sub-surface layer. The gradient loading method of nano-titanium dioxide photocatalyst material involves a high-density loading of nano-titanium dioxide photocatalyst material in the surface area. Under sunlight irradiation, the nano-titanium dioxide photocatalyst material generates photogenerated electron-hole pairs, oxidizing NOx in automobile exhaust into nitrates or nitrites and VOCs into intermediate products such as organic acids. The low-density loading or no loading of nano-titanium dioxide photocatalyst material in the subsurface area keeps the water permeability unobstructed and reduces the negative impact of the photocatalyst material on the permeability of the permeable base layer 211. Each grass-embedded brick 212 has holes, and each hole is filled with planting substrate and planted with trampling-resistant herbaceous plants, such as bermudagrass, zoysia grass, and tall fescue. like Figure 3As shown, the rainwater interception layer 220 is disposed below the permeable base layer 211. The rainwater interception layer 220 includes a first-stage screen, a second-stage screen, and a third-stage screen arranged sequentially from top to bottom along the rainwater infiltration direction. Each screen is woven from 304 or 316L stainless steel wire with a wire diameter of 0.5~2.0mm, possessing corrosion resistance and tensile strength. The mesh shape of each screen is square or rectangular, and the mesh size gradually decreases along the infiltration direction. The first-stage screen has a pore size of 200μm and is used to intercept coarse particles larger than 200μm, including large-diameter tire wear particles and road surface gravel. The second-stage screen has a pore size of 100μm and is disposed directly below the first-stage screen, used to intercept medium-sized particles with a particle size of 100~200μm. The third-stage screen has a pore size of 50μm and is disposed directly below the second-stage screen, used to intercept fine particles with a particle size of 50~100μm. The first-level screen is laid at the bottom of the permeable base layer 211. The edges of the first-level screen are fixed to the side wall or concrete structure of the parking lot 100 by expansion bolts or pre-embedded anchors. The second-level screen is fixed to the first-level screen, and the third-level screen is fixed to the second-level screen by multiple vertical support columns. The vertical support columns are made of stainless steel round or square steel. The upper end of the vertical support column is fixed to the lower surface of the upper-level screen by welding or clipping, and the lower end of the vertical support column is fixed to the upper surface of the lower-level screen by welding or clipping, so that each level... The screens are spaced evenly, and each level of screen is equipped with a detachable transverse reinforcing rib. The transverse reinforcing rib is located in the middle and at the edge of the screen and is fixed to the vertical support column to enhance the overall rigidity of the screen and prevent the screen from bending and deforming due to the accumulation of particles during long-term operation. Each level of screen is equipped with a sealing strip between itself and the side wall of the parking lot 100. The sealing strip is made of rubber or silicone and is embedded in the gap between the edge of the screen and the side wall to prevent rainwater from seeping directly into the gap between the screen and the side wall without being filtered by the screen. During operation, rainwater carrying suspended particulate matter flows from top to bottom through the first-stage screen. Coarse particles with a diameter greater than 200 μm are intercepted and accumulate on the upper surface of the first-stage screen, forming the first filter cake layer. The particles in this filter cake layer have a gap of less than 200 μm, which can further intercept some medium-sized particles with a diameter less than 200 μm in the downstream water, achieving a preliminary secondary filtration effect. When the infiltrated water carries unintercepted medium-sized particles to the second-stage screen, medium-sized particles with a diameter of 100~200 μm are intercepted and accumulate on the upper surface of the second-stage screen, forming the second filter cake layer. The remaining water continues to infiltrate to the third-stage screen, where fine particles with a diameter of 50~100 μm are intercepted. Through the step-by-step interception of the three-stage screen and the synergistic filtration effect of the filter cake layers above each stage screen, the suspended particulate matter content in the rainwater that infiltrates to the next treatment unit is significantly reduced. like Figure 5As shown, the constructed wetland unit 300 is located at the bottom of the treatment unit 200. From top to bottom along the water flow direction, it includes a cold-resistant bacteria enrichment zone 310, a carbon source slow-release layer 320, and a water collection layer group 330. The cold-resistant bacteria enrichment zone 310 is laid directly below the third-level screen in the rainwater interception layer 220. The upper surface of the cold-resistant bacteria enrichment zone 310 is in contact with the lower surface of the third-level screen. It is filled with a mixed filler of biochar and volcanic rock. The cold-resistant bacteria composite agent is fixed on the biochar. When rainwater infiltrates into the cold-resistant bacteria enrichment zone 310, the cold-resistant bacteria composite agent biodegrades the organic matter in the rainwater under low temperature conditions. The biochar, as a carrier, can provide attachment sites for the cold-resistant bacteria, making it less likely for the cold-resistant bacteria to be lost with the water flow during wetland operation. The cold-resistant bacteria composite agent includes at least one of Psychrobacter TM-1, Sphingobacterium TM-2, and Pseudomonas flava WD-3. like Figure 5 As shown, the carbon source slow-release layer 320 is laid directly below the cold-resistant bacteria enrichment zone 310. The upper surface of the carbon source slow-release layer 320 is in contact with the lower surface of the cold-resistant bacteria enrichment zone 310. It is filled with a mixture of sawdust and straw. After degradation, rainwater enters the carbon source slow-release layer 320. The sawdust and straw can slowly release carbon source under the action of microorganisms, providing electron donors for denitrifying bacteria and reducing nitrate nitrogen in rainwater to nitrogen gas. Through the series arrangement of the above two functional layers, organic matter degradation and denitrification are carried out in a vertical partition, which can reduce the competition and interference between different functional microorganisms. The small molecule organic acids, nitrates and other products generated during the photocatalysis process can be used as substrates for the metabolism of cold-resistant bacteria after they infiltrate into the cold-resistant bacteria enrichment zone 310 with rainwater. like Figure 5 As shown, the water collection layer group 330 includes a water collection pool 331, which is located directly below the carbon source slow-release layer 320. The water collection pool 331 is a one-piece concrete structure. The bottom and side walls of the water collection pool 331 are fixedly connected to the foundation of the parking lot 100. A load-bearing beam 332 is fixed inside the water collection pool 331. The load-bearing beam 332 is a precast reinforced concrete beam. Multiple load-bearing beams 332 are arranged parallel and spaced at the top opening of the water collection pool 331, with both ends of the load-bearing beams 332 embedded in the water collection pool 320. The load-bearing beam 332 is cast and fixed to the side wall of the 31. The upper surface of the load-bearing beam 332 is in contact with the lower surface of the carbon source slow-release layer 320. The gap between adjacent load-bearing beams 332 forms a flow channel for rainwater to flow into the collection tank 331. Through the spaced arrangement of the load-bearing beams 332, the weight of the filler layer is transferred to the side wall and foundation of the collection tank 331 through the load-bearing beams 332. The gap between adjacent load-bearing beams 332 forms a flow channel, allowing purified water to flow into the collection tank 331 by gravity without external power. like Figure 6 and Figure 7As shown, the adsorption unit 400 includes a purification component 410, which is located on one side of the paving layer group 210. A circulation component 420 is provided on one side of the purification component 410. The purification component 410 includes a cabinet 411, which is fixedly installed on the ground at the edge of the parking lot 100. The bottom of the cabinet 411 is fixedly connected to the ground by anchor bolts. A first pump is fixed on the cabinet 411 and is fixedly installed on the inner wall of the cabinet 411 by bolts. The input end of the first pump is connected to the water collection tank 331 through a first pipe. One end of the first pipe is sealed to the outlet at the bottom of the water collection tank 331 by a flange, and the other end of the first pipe passes through... The first pipe body is buried in the ground base of the parking lot 100 and is sealed to the inlet of the first pump through a flange. The output end of the first pump is fixed to the adsorption filter tank 412 through the second pipe body. One end of the second pipe body is sealed to the output end of the first pump through a flange, and the other end of the second pipe body is sealed to the inlet of the adsorption filter tank 412 through a flange. The second pipe body is fixed to the inner wall of the cabinet 411 and fixed to the cabinet 411 through pipe clamps. The output end of the adsorption filter tank 412 is connected to the input end of the advanced oxidation reactor 413, so that the outlet of the adsorption filter tank 412 is connected to the inlet of the advanced oxidation reactor 413. like Figure 6 and Figure 7 As shown, the adsorption filter 412 has an openable cover structure with a removable sealing cover on the top. The sealing cover is fixedly connected to the body of the adsorption filter 412 by bolts. A sealing ring is provided between the sealing cover and the body. The internal adsorption material is detachably set in the filter can in the form of modular units. The adsorption modules are placed on the support frame inside the filter can. The support frame is welded to the inner wall of the filter can. The adsorption filter 412 is filled with modified biochar or zeolite adsorption material for adsorbing and removing dissolved 6PPD-quinone. Through the modular and replaceable structure, the replacement of the adsorption material does not require digging up the ground of the parking lot 100. It can be completed simply by opening the sealing cover, taking out the saturated module and replacing it with a new module. like Figure 7As shown, the advanced oxidation reactor 413 is a closed reaction vessel, bolted to the inner wall of the cabinet 411, located on one side of the adsorption filter tank 412. It contains an ultraviolet (UV) light source, which is fixedly mounted on the top of the inner cavity of the advanced oxidation reactor 413. Its substrate is bolted to the inner wall of the reactor. Wires pass through sealed wiring holes on the reactor wall and are electrically connected to an external power source. The advanced oxidation reactor 413 also has a periodate dosing port located at the top of the reactor. The first pump... The purified water in the collection tank 331 is raised to the adsorption filter tank 412, and after adsorption, it enters the advanced oxidation reactor 413. Under ultraviolet light irradiation, periodate is activated to produce strong oxidizing active species, which oxidize and degrade the residual 6PPD-quinone in the water. By arranging the adsorption filter tank 412 and the advanced oxidation reactor 413 in series, after the 6PPD-quinone is adsorbed and removed in the adsorption filter tank 412, the remaining part enters the advanced oxidation reactor 413 for deep oxidation, which can reduce the risk of pollutants being released again after the adsorption material is saturated in a single adsorption process. like Figure 7 As shown, a photovoltaic panel is fixed to the top of the cabinet 411. The photovoltaic panel is fixedly installed on the top of the cabinet 411 by a bracket. The bottom of the bracket is fixedly connected to the top surface of the cabinet 411 by bolts. The photovoltaic panel is fixedly connected to the bracket by bolts. The photovoltaic panel is electrically connected to a storage battery. The storage battery is fixedly installed on the inner wall of the cabinet 411 by bolts. The output end of the photovoltaic panel is electrically connected to the charging end of the storage battery by a wire. The wire passes through the wire hole at the top of the cabinet 411. A waterproof sealing sleeve is provided at the wire hole. The photovoltaic panel converts solar energy into electrical energy and stores it in the storage battery to provide power for the first pump, the advanced oxidation reactor 413 and the control system without the need for an external power source. like Figure 6As shown, the circulation component 420 includes a water tank 421 with a built-in second pump. The water tank 421 is fixedly installed on one side of the cabinet 411. The bottom of the water tank 421 is fixedly connected to the ground by bolts. The water tank 421 is connected to a spray pipe 422 through a third pipe. One end of the third pipe is sealed to the outlet of the water tank 421 by a flange, and the other end is sealed to the inlet of the spray pipe 422 by a flange. The third pipe is laid along the ground of the parking lot 100 and fixed to the ground by pipe clamps. Several spray heads 423 are arranged at intervals on the spray pipe 422. The spray heads 423 are fixed to the spray pipe 422 by threaded connections, and the spray direction is towards the parking lot 100. The ground is 0. The water tank 421 is connected to the outlet of the advanced oxidation reactor 413 through the fourth pipe. One end of the fourth pipe is sealed to the outlet of the advanced oxidation reactor 413, and the other end of the fourth pipe is sealed to the inlet of the water tank 421. The fourth pipe is laid along the outer wall of the cabinet 411 and fixed to the outer wall of the cabinet 411 by pipe clamps. The purified water after being treated by the advanced oxidation reactor 413 enters the water tank 421 for temporary storage. The water tank 421 has a second pump built in it. Under the pumping action of the second pump, the water is transported to the spray pipe 422 through the third pipe and sprayed out through the spray head 423. The parking lot 100 can be sprayed and the green area can be irrigated, realizing the on-site recycling of rainwater resources. The fourth pipe body is equipped with a control valve, which is fixedly connected to the fourth pipe body via flanges. The valve body of the control valve is sealed to the fourth pipe body at both ends via flanges. The control valve is electrically connected to a control unit, which includes a water quality sensor. The control unit is fixedly installed on the outer wall of the advanced oxidation reactor 413 by bolts. The signal input terminal of the control unit is electrically connected to the water quality sensor located at the outlet of the advanced oxidation reactor 413 via a wire. The signal output terminal of the control unit is electrically connected to the drive motor of the control valve via a wire. The control unit is used to collect the water quality parameters of the purified water. When the water quality parameters meet the reuse standard, the control valve opens, and the purified water enters the water tank 421 through the fourth pipe body for temporary storage. When the water quality parameters do not meet the reuse standard, the control valve closes, so that the purified water circulates back in the advanced oxidation reactor 413 for reprocessing until the water quality meets the standard. The control valve reopens after the water quality meets the standard. The cooperation between the control valve and the control unit reduces the possibility of unqualified water entering the reuse process. like Figure 8As shown, the parking lot 100 includes a ground layer 110, on which a surface 111 is laid. Protective partitions 112 are spaced apart on the surface 111, serving as isolation strips between adjacent rows of parking spaces. These partitions extend along the width or length of the parking spaces, dividing the surface 111 of the parking lot 100 into several independent parking units. A cold-resistant bacteria replenishment pipe is installed beneath the surface 111, buried between the surface 111 and the cold-resistant bacteria enrichment area 310. One end is in contact with the upper surface of the cold-resistant bacteria enrichment zone 310, and the other end extends upward to the ground surface 111 and is provided with an injection port. The injection port protrudes from the ground surface 111 or is flush with the ground surface 111. An openable and closable sealing cap is provided on the injection port. The sealing cap is connected to the injection port by a thread. By periodically injecting cold-resistant bacteria liquid into the injection pipe, the bacteria liquid flows into the cold-resistant bacteria enrichment zone 310 under the action of gravity, replenishing and renewing the cold-resistant bacteria compound agent. There is no need to excavate the artificial wetland unit 300. In summary, when rainwater flows through the pavement layer group 210, the organic matter in the rainwater is photocatalytically degraded on the surface of the pavement layer group 210. After the rainwater interception layer 220 intercepts particulate matter, it infiltrates into the constructed wetland unit 300, where it is biodegraded in the cold-resistant bacteria enrichment zone 310. After denitrification in the carbon source slow-release layer 320, it flows into the water collection layer group 330 and is then deeply treated by the adsorption unit 400 before being reused. The units are connected sequentially by pipes and flow channels, forming a treatment path of photocatalytic degradation, permeable infiltration, graded interception, biological treatment, deep purification, and collection and reuse. This ecological parking lot, which combines ecological wetland treatment of rainwater, achieves the transfer and transformation of gaseous pollutants to liquid state and the tiered removal of suspended particulate matter in rainwater runoff through the photocatalytic degradation of the pavement layer group 210 in treatment unit 200 and the staged interception of rainwater interception layer 220. Through the series arrangement of the cold-resistant bacteria enrichment zone 310 and the carbon source slow-release layer 320 in the artificial wetland unit 300, the biodegradation and denitrification of organic matter in rainwater under low-temperature conditions are realized. Through the combination of adsorption filter tank 412 and advanced oxidation reactor 413 in adsorption unit 400, the adsorption interception and deep oxidation of 6PPD-quinone are realized. Through the spatial layout of vertical stacking and horizontal flow of each unit, rainwater flows through each treatment unit in sequence under gravity, and most of the process does not require external power. The components in the adsorption unit 400 above the ground that require maintenance are within the operable range and maintenance operations can be completed without excavation.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ecological parking lot that combines ecological wetlands to treat rainwater from parking lots, comprising a parking lot (100), characterized in that, include: A treatment unit (200) is laid on the ground of the parking lot (100). The treatment unit (200) includes a pavement layer group (210) and a rainwater interception layer (220). The pavement layer group (210) is located above the treatment unit (200), and the rainwater interception layer (220) is located below the pavement layer group (210). An artificial wetland unit (300) is located at the bottom of the treatment unit (200). The artificial wetland unit (300) includes, from top to bottom, a cold-resistant bacteria enrichment zone (310), a carbon source slow-release layer (320), and a water collection layer group (330) along the water flow direction. The cold-resistant bacteria enrichment zone (310) is located at the bottom of the rainwater interception layer (220). An adsorption unit (400) is installed on the surface of the parking lot (100). The adsorption unit (400) includes a purification component (410) located on one side of the pavement layer group (210). A circulation component (420) is provided on one side of the purification component (410). When rainwater flows through the pavement layer group (210), the organic matter in the rainwater is photocatalytically degraded on the surface of the pavement layer group (210). After the rainwater interception layer (220) intercepts particulate matter, it infiltrates into the constructed wetland unit (300). In the cold-resistant bacteria enrichment zone (310), the rainwater comes into contact with the cold-resistant bacteria composite agent, and the organic matter is biodegraded. After further denitrification and nitrogen removal by the carbon source slow release layer (320), it flows into the water collection layer group (330). The purified water in the water collection layer group (330) is deeply treated by the adsorption unit (400) and recycled.

2. An ecological parking lot combining ecological wetland for rainwater treatment according to claim 1, characterized in that, The paving layer group (210) includes a permeable base layer (211), on which a groove is provided. The groove is filled by multiple grass-embedded bricks (212) in sequence. The surface of the grass-embedded bricks (212) is loaded with nano-titanium dioxide photocatalytic material. Each grass-embedded brick (212) has holes, and each hole is filled with planting substrate and planted with trampling-resistant herbaceous plants. When rainwater flows over the surface of the grass-embedded brick (212), the nano-titanium dioxide photocatalytic material oxidizes and degrades the organic pollutants in the rainwater under sunlight. At the same time, the trampling-resistant herbaceous plants planted in the holes of the grass-embedded brick (212) absorb the nitrogen and phosphorus nutrients in the rainwater, thereby reducing the pollution of rainwater runoff at the source.

3. An ecological parking lot combining ecological wetland for rainwater treatment according to claim 2, characterized in that, The nano-titanium dioxide photocatalytic material is loaded at high density on the surface of the grass-embedded brick (212), and the rainwater interception layer (220) includes a first-level screen, a second-level screen and a third-level screen arranged sequentially along the rainwater infiltration direction; The system uses a first-stage screen to intercept coarse particles, a second-stage screen to intercept medium-sized particles, and a third-stage screen to intercept fine particles. There are gaps between the screens at each stage, which allows the intercepted particles to gradually form a filter cake layer on the upper surface of each screen. This tiered filtration method effectively removes suspended particles from rainwater.

4. An ecological parking lot that combines ecological wetland treatment of rainwater from the parking lot according to claim 1, characterized in that, The cold-resistant bacteria enrichment zone (310) is filled with a mixture of biochar and volcanic rock, and the biochar is fixed with a cold-resistant bacteria compound agent. The carbon source slow-release layer (320) is filled with a mixture of sawdust and straw. When rainwater infiltrates into the cold-resistant bacteria enrichment zone (310), the cold-resistant bacteria compound agent biodegrades the organic matter in the rainwater under low temperature conditions. The degraded rainwater enters the carbon source slow-release layer (320), and the sawdust and straw slowly release carbon sources under the action of microorganisms.

5. An ecological parking lot combining ecological wetland for rainwater treatment according to claim 4, characterized in that, The water collection layer group (330) includes a water collection pool (331), and a load-bearing beam (332) is fixed inside the water collection pool (331). The top of the load-bearing beam (332) supports the carbon source slow-release layer (320). Multiple load-bearing beams (332) are arranged in parallel at intervals at the top opening of the water collection tank (331). The upper surface of the load-bearing beams (332) is in contact with the lower surface of the carbon source slow-release layer (320). The load-bearing beams (332) provide structural support for the carbon source slow-release layer (320) and the overlying filler layer. At the same time, the gap between adjacent load-bearing beams (332) forms a flow channel for rainwater to flow into the water collection tank (331), so that the purified water treated by the artificial wetland unit (300) flows into the water collection tank (331) under the action of gravity through the flow channel.

6. An ecological parking lot combining ecological wetland for rainwater treatment according to claim 5, characterized in that, The purification component (410) includes a cabinet (411), on which a first pump is fixed. The input end of the first pump is connected to a water collection tank (331) through a first pipe. The first pipe is buried in the ground base of the parking lot (100). The output end of the first pump is fixed to an adsorption filter tank (412) through a second pipe. The second pipe is fixed inside the cabinet (411). The output end of the adsorption filter tank (412) is connected to the input end of an advanced oxidation reactor (413). The first pump lifts the purified water in the collection tank (331) to the adsorption filter tank (412). After the residual organic matter is removed by the adsorption filter tank (412), the water enters the advanced oxidation reactor (413) and undergoes deep oxidation and degradation of the recalcitrant organic matter in the water under ultraviolet light irradiation.

7. An ecological parking lot combining ecological wetland for rainwater treatment according to claim 6, characterized in that, The circulation component (420) includes a water tank (421), which has a built-in second pump. The water tank (421) is connected to a spray pipe (422) through a third pipe, and a number of spray heads (423) are arranged at intervals on the spray pipe (422). The purified water, after being deeply treated by the advanced oxidation reactor (413), enters the water tank (421) for temporary storage. The purified water in the water tank (421) is pumped by the second pump and transported to the spray pipe (422) through the third pipe. It is then sprayed out in the form of mist through the spray head (423) to spray the parking lot (100) for dust suppression and greening irrigation.

8. An ecological parking lot combining ecological wetland for rainwater treatment according to claim 7, characterized in that, The water tank (421) is connected to the outlet of the advanced oxidation reactor (413) through a fourth pipe; The fourth tube transports the purified water treated by the advanced oxidation reactor (413) to the water tank (421) for storage. The fourth tube is fixed to the outer wall of the cabinet (411) to provide structural fixation and protection for the fourth tube.

9. An ecological parking lot combining ecological wetland for rainwater treatment according to claim 8, characterized in that, The fourth tube is fixed to the cabinet (411), and a control valve is provided inside it. The control valve is electrically connected to a control unit, and the control unit is fixed to the outer wall of the advanced oxidation reactor (413). The control unit is used to collect the purified water quality parameters of the outlet of the advanced oxidation reactor (413) and send a switch control command to the control valve according to the water quality parameters to adjust the flow of purified water from the fourth pipe to the water tank (421). When the water quality parameters meet the reuse standard, the control valve opens and the purified water enters the water tank (421) through the fourth pipe for temporary storage.

10. An ecological parking lot combining ecological wetland for rainwater treatment according to claim 4, characterized in that, The parking lot (100) includes a ground layer (110), on which a ground surface (111) is laid, and protective partitions (112) are provided at intervals on the ground surface (111). A cold-resistant bacteria replenishment pipe is also provided below the ground surface (111). One end of the cold-resistant bacteria replenishment pipe is connected to the cold-resistant bacteria enrichment area of ​​the artificial wetland unit, and the other end protrudes from the ground surface (111) or is flush with the ground surface (111). The cold-resistant bacteria replenishment injection pipe is buried between the ground surface (111) and the cold-resistant bacteria enrichment area (310). By periodically injecting cold-resistant bacteria liquid into the cold-resistant bacteria replenishment injection pipe, the cold-resistant bacteria compound agent in the cold-resistant bacteria enrichment area (310) is replenished and renewed.

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