CN112194315A - Anti snow melt agent improvement type biological facility that is detained - Google Patents
Anti snow melt agent improvement type biological facility that is detained Download PDFInfo
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- CN112194315A CN112194315A CN202011020017.5A CN202011020017A CN112194315A CN 112194315 A CN112194315 A CN 112194315A CN 202011020017 A CN202011020017 A CN 202011020017A CN 112194315 A CN112194315 A CN 112194315A
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- 239000005413 snowmelt Substances 0.000 title claims description 21
- 238000001179 sorption measurement Methods 0.000 claims abstract description 58
- 238000009301 bioretention Methods 0.000 claims abstract description 57
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 48
- 150000001450 anions Chemical class 0.000 claims abstract description 42
- 150000001768 cations Chemical class 0.000 claims abstract description 37
- 239000002689 soil Substances 0.000 claims abstract description 34
- 238000002844 melting Methods 0.000 claims abstract description 28
- 230000014759 maintenance of location Effects 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 69
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000004746 geotextile Substances 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- 239000003957 anion exchange resin Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000002352 surface water Substances 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 6
- 150000003839 salts Chemical class 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 19
- 239000012528 membrane Substances 0.000 description 12
- 239000000945 filler Substances 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 244000025254 Cannabis sativa Species 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- -1 chlorine ions Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 241000736262 Microbiota Species 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000021384 green leafy vegetables Nutrition 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000001766 physiological effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Sewage (AREA)
Abstract
The invention discloses an improved biological retention facility for a snow-melting agent, which comprises: the biological retention facility is sequentially provided with a drainage layer, a cation adsorption filling layer and a planting soil layer from bottom to top; at least one vatch basin, the vatch basin is located the lateral wall of biological detention facility, supreme anion adsorbed layer and the reservoir of setting gradually down in the vatch basin, anion adsorbed layer through a plurality of outlet pipes with the top on planting the soil layer is linked together. According to the invention, the anion adsorption layer and the cation adsorption filling layer are applied to the bioretention facility, so that the initial interception and purification of runoff containing the snow-melting agent are realized, the salt content of the runoff entering the bioretention facility main body is reduced, and the running stability of the bioretention facility is finally improved under the stress condition of the snow-melting agent.
Description
Technical Field
The invention relates to the technical field of ecological water treatment facilities, in particular to an improved type biological retention facility for a snow-melting-agent-resistant agent.
Background
The biological detention facility is used as an ecological water treatment facility and is widely applied to the regulation and purification purposes of the rainwater runoff. However, winter hardened pavements, particularly with the use of road snow melts, introduce large amounts of chloride salts into bioretention facilities dominated by greens, cause salinization of the matrix inside the bioretention facilities, have significant biotoxicity to vegetation and microbiota within the facilities, and even contaminate groundwater supplies. At present, the traditional bioretention facilities do not adopt corresponding technical means to counteract the adverse effect of the snow-melting agent on the normal function of the facilities.
Disclosure of Invention
Aiming at the problems of the existing bioretention facilities, the improved bioretention facility for resisting the snow-melting agent is provided, the anion adsorption layer and the cation adsorption filling layer are applied to the bioretention facility, the adsorption capacity of the ion adsorption material to anions and cations of a water body can be fully utilized, the self-hardening pavement is discharged into the ground runoff containing the snow-melting agent in the facility, after chlorine ions in the runoff are removed from runoff pollutants of the runoff through the anion adsorption material, the residual cations of the snow-melting agent are adsorbed and removed through the cation adsorption material arranged in the matrix, so that the initial interception and purification of the runoff containing the snow-melting agent are realized, the salt content rate of the runoff entering a bioretention facility main body is reduced, and the running stability of the bioretention facility under the stress condition of the snow-melting agent is finally improved.
The specific technical scheme is as follows:
an anti-snow melt agent improved bioretention facility comprising:
the biological retention facility is sequentially provided with a drainage layer, a cation adsorption filling layer and a planting soil layer from bottom to top;
at least one vatch basin, the vatch basin is located the lateral wall of biological detention facility, supreme anion adsorbed layer and the reservoir of setting gradually down in the vatch basin, anion adsorbed layer through a plurality of outlet pipes with the top on planting the soil layer is linked together.
The improved biological retention facility for the snow-melting-resistant agent is characterized in that a surface stagnant water layer is arranged on the planting soil layer, and the bottom of the outlet of the water outlet pipe is consistent with the normal water level of the surface stagnant water layer;
and an overflow rainwater port is arranged in the biological retention facility, and the top of a wellhead of the overflow rainwater port is consistent with the normal water level of the surface stagnant water layer.
Foretell anti snow melt agent improvement type biological facility of detaining, wherein, a plurality of grid apron are installed to the top of vatch basin, and is a plurality of the grid apron is followed the length direction of vatch basin sets up.
Foretell anti snow melt agent improvement type is biological to be detained facility, wherein, the water storage layer includes a plurality of water storage modules, anion adsorption layer includes a plurality of anion adsorption units, and is a plurality of the water storage module is followed the vertical setting of vatch basin, it is a plurality of anion adsorption units are followed the vertical setting of vatch basin.
In the above improved biological retention facility for snow-melting resistant agent, each of the anion adsorption units is communicated with the surface water retention layer through the water outlet pipe.
The improved type of the snow-melting-agent-resisting bioretention facility is characterized in that an impermeable membrane is arranged on the peripheral wall of the bioretention facility, the drainage layer, the cation adsorption filling layer, the planting soil layer and the surface water-retaining layer are at least sequentially arranged in the impermeable membrane from bottom to bottom, the top of the impermeable membrane is consistent with the normal water level of the surface water-retaining layer, and a plain soil foundation is arranged at the bottom of the impermeable membrane.
Foretell anti snow melt agent improvement type biological detention facility, wherein, the vatch basin includes the cell body, supreme setting gradually down in the cell body anion adsorbed layer with the aquifer, it is a plurality of the one end of outlet pipe respectively with anion adsorbed layer, it is a plurality of the other end of outlet pipe passes respectively the lateral wall of cell body, and with the surface stagnant water layer is linked together.
In the snow melt agent resistant improved bioretention facility, the peripheral wall of the anion adsorption layer, the peripheral wall of the water storage layer, the space between the drainage layer and the cation adsorption filling layer, and the space between the cation adsorption filling layer and the planting soil layer are all provided with permeable geotextiles.
In the snow melt agent resistant improved bioretention facility, the anion adsorption layer is strong alkali type anion exchange resin particles, and the cation adsorption filling layer is granular activated carbon.
In the improved biological retention facility of the snow melt resistant agent, the water storage layer is made of porous cellucotton.
Compared with the prior art, the technical scheme has the positive effects that:
the invention can make full use of the adsorption capacity of the ion adsorption material to the anions and cations of the water body by applying the ion adsorption material to the traditional bioretention facility, discharge the self-hardening pavement into the snow-melting agent-containing ground runoff in the facility, firstly guide the self-hardening pavement into the intercepting ditches arranged along the two longitudinal sides of the bioretention facility, carry out preliminary physical absorption and interception on runoff pollutants through the water storage layers prefabricated in the intercepting ditches, then discharge the runoff into the bioretention facility after removing the chloride ions in the runoff through the anion adsorption layers, absorb and remove the residual snow-melting agent cations through the cation adsorption filling layers arranged in the facility while the runoff infiltrates in the bioretention facility, thereby realizing the initial interception and purification of the snow-melting agent-containing runoff, reducing the salt content of the runoff entering the bioretention facility body, and finally improving the snow-melting agent stress condition, stability of operation of the bioretention facility.
Drawings
FIG. 1 is a schematic plan view of an improved anti-snow melt bioretention facility according to the present invention;
FIG. 2 is a cross-sectional view taken in the direction A-A of FIG. 1 of an improved snow melt resistant bioretention facility according to the present invention;
in the drawings: 1. a bioretention facility; 2. intercepting a flow channel; 5. an overflow gully; 6. water-permeable geotextile; 11. a drainage layer; 12. a cation adsorbing and filling layer; 13. planting a soil layer; 14. a surface stagnant layer; 15. salt tolerant plants; 16. an impermeable membrane; 17. a plain soil foundation; 21. an anion-adsorbing layer; 22. a aquifer; 23. a grid cover plate; 24. a tank wall; 31. a water outlet pipe; 32. passing through the kerbstone; 41. a vehicle lane; 42. and (5) slowly moving.
Detailed Description
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Fig. 1 is a schematic plan view showing an arrangement of an improved bioretention facility for resisting a snow melt agent according to the present invention, fig. 2 is a sectional view taken along a direction a-a of fig. 1 of an improved bioretention facility for resisting a snow melt agent according to the present invention, as shown in fig. 1 and 2, showing an improved bioretention facility for resisting a snow melt agent according to a preferred embodiment, including: biological detention facility 1 and an at least vatch canal 2, biological detention facility 1 sets gradually drainage blanket 11, cation absorption filling layer 12 and planting soil layer 13 from supreme down, and the lateral wall of biological detention facility 1 is located to the vatch canal 2, sets gradually anion adsorbed layer 21 and water storage layer 22 from supreme down in the vatch canal 2, and anion adsorbed layer 21 is linked together through a plurality of outlet pipes 31 and planting soil layer 13's top.
Preferably, intercepting trenches 2 are provided at both sides of the bioretention facility 1, one side of one intercepting trench 2 away from the bioretention facility 1 is a motor way 41, and one side of the other intercepting trench 2 away from the bioretention facility 1 is a slow way 42.
Preferably, a water passing kerbstone 32 is arranged on one side of the catch basin 2 close to the motor vehicle lane 41.
Preferably, the water passing kerbstone 32 is prefabricated open-hole kerbstone, and concrete material, but not limited to the material, is arranged between the hardened pavement and the cut-off trench 2.
Further, as a preferred embodiment, the bioretention facility 1 is provided with a surface stagnant water layer 14 on the planting soil layer 13, and the bottom of the outlet of the water outlet pipe 31 is consistent with the normal water level of the surface stagnant water layer 14.
Further, as a preferred embodiment, the bioretention facility 1 is provided with an overflow gully 5, and the top of the wellhead of the overflow gully 5 is consistent with the normal water level of the surface stagnant water layer 14.
Preferably, the surface stagnant layer 14 is used for the reception cut-off trench 2 to treat the effluent, and the overflow rainwater runoff.
Preferably, salt-tolerant plants 15 which are salt-tolerant and water-tolerant are uniformly planted in the bioretention facility 1 and are positioned on the planting soil layer 13.
Preferably, the surface stagnant water layer 14 has a normal water level depth of 5cm and an elevation controlled by a relief of 20 cm. The overflow rainwater port 5 is arranged in the biological retention facility 1, the elevation of the well mouth is consistent with that of the surface stagnant water layer 14, and a rainwater connecting pipe and a municipal rainwater pipeline are arranged in the overflow rainwater port and communicated with each other for controlling the water level in the biological retention facility 1 and transferring excess rainwater.
The above are merely preferred embodiments of the present invention, and the embodiments and the protection scope of the present invention are not limited thereby.
The present invention also has the following embodiments in addition to the above:
in a further embodiment of the present invention, please refer to fig. 1 and fig. 2, a plurality of grating cover plates 23 are installed on the top of the intercepting trench 2, and the grating cover plates 23 are arranged along the length direction of the intercepting trench 2.
In a further embodiment of the present invention, the water storage layer 22 comprises a plurality of water storage modules, the anion adsorption layer 21 comprises a plurality of anion adsorption units, the plurality of water storage modules are arranged along the longitudinal direction of the cut-off trench 2, and the plurality of anion adsorption units are arranged along the longitudinal direction of the cut-off trench 2.
Preferably, the water storage module is 30cm high and the anion adsorption unit is 50cm high.
In a further embodiment of the present invention, each anion adsorption unit is communicated with the surface water-retaining layer 14 through a water outlet pipe 31.
In a further embodiment of the invention, the peripheral wall of the bioretention facility 1 is provided with an impermeable membrane 16, at least a drainage layer 11, a cation adsorption filling layer 12, a planting soil layer 13 and a surface water-retaining layer 14 are arranged in the impermeable membrane 16 from bottom to top in sequence, the top of the impermeable membrane 16 is consistent with the normal water level of the surface water-retaining layer 14, and the bottom of the impermeable membrane 16 is provided with a plain soil foundation 17.
Preferably, the impermeable membrane 16 is located on the side wall of the bioretention facility 1 and on the bottom of the bioretention facility 1.
Preferably, the cation adsorption filler layer 12 is located at the lower part of the planting soil layer 13, and is filled with cation adsorption material, which is granular activated carbon, but not limited to this material, and is filled under the planting soil layer 13. The periphery of the cation adsorption packing layer 12 is coated with the permeable geotextile 6.
Preferably, the drainage layer 11 is positioned at the lower part of the cation adsorption filler layer 12 to the grass planting furrow plain soil foundation 17, gravels with the grain diameter of 20 cm-50 cm are filled, and the bottom and the periphery of the drainage layer 11 are paved with impermeable membranes 16 to the surface stagnant water layer 14 normal water level.
In a further embodiment of the present invention, the intercepting trench 2 includes a tank body 24, an anion-adsorbing layer 21 and a water-storing layer 22 are sequentially disposed in the tank body 24 from bottom to top, one end of a plurality of water outlet pipes 31 respectively connects with the anion-adsorbing layer 21, and the other end of the plurality of water outlet pipes 31 respectively passes through the sidewall of the tank body 24 and communicates with the surface water-retaining layer 14.
Preferably, the intercepting ditch 2 is a linear tank body which is built together with the biological retention facility 1 and is longitudinally arranged along two sides of the biological retention facility 1, the section of the tank body 24 is rectangular, the top of the tank body is closed by a grating cover plate 23, and the tank body 24 is made of bricks, but not limited to the material.
Preferably, the bioretention facility 1 is a linear surface runoff treatment facility having a rectangular cross-section with two sides connected to the cut-off trench 2. The underground part of the bioretention facility 1 is connected with a soil foundation 17, and an impermeable membrane 16 is laid to the top of the surface stagnant water layer 14.
Preferably, the planting soil layer 13 is located on the top of the bioretention facility 1, is filled with nutrient soil with a depth of 30cm, and comprises 10% of coarse sand, 70% of grass carbon and 20% of vermiculite, but is not limited to the mixture ratio.
Preferably, the outlet pipe 31 is located at the bottom of the cut-off trench 2, running up to the surface stagnant water layer 14 of the bioretention plant 1 via the inside pool wall 24 of the cut-off trench 2.
Preferably, the grating cover plate 23 is arranged on the top of the intercepting ditch pool and is arranged along the whole line of the intercepting ditch 2, the strength meets the requirement of safe standing of pedestrians, and the material is stainless steel, but not limited to the material.
In a further embodiment of the invention, the permeable geotextiles 6 are arranged on the peripheral wall of the anion adsorption layer 21, the peripheral wall of the water storage layer 22, between the drainage layer 11 and the cation adsorption filling layer 12, and between the cation adsorption filling layer 12 and the planting soil layer 13.
In a further embodiment of the present invention, the anion-adsorptive layer 21 is a strong base type anion exchange resin particle. Preferably, but not limited to, the material has a particle size of 0.5mm to 1.0m, the anion absorption layer 21 is arranged at the bottom of the intercepting ditch 2, and the permeable geotextile 6 is coated outside the anion absorption layer.
In a further embodiment of the present invention, the cation adsorbing packed layer 12 is granular activated carbon.
Preferably, the cation adsorption filler layer 12 is located at the lower part of the planting soil layer 13, the depth of the cation adsorption filler layer is 30cm, cation adsorption materials are filled, the material is granular activated carbon, and the filler layer is externally wrapped by the water-permeable geotextile 6.
In a further embodiment of the invention, the aquifer 22 is porous cellucotton. Preferably, but not limited to, the water storage module is arranged in the cut-off trench 2, and the upper part of the anion adsorption material is wrapped by the permeable geotextile 6.
When the system is operated, surface rainwater runoff containing the snow-melting agent flows through the water curbstone 32 or enters the improved biological retention facility of the snow-melting agent resistance from hardened ground surfaces on two sides in a overflowing mode, rainwater runoff entering the facility is firstly guided into the intercepting ditches 2 on two sides and sequentially passes through the grating cover plate 23, the water storage layer 22 and the anion adsorption layer 21, large impurities and garbage are firstly intercepted on the grating cover plate 23 and are periodically cleaned and removed, the water storage layer on the lower part of the grating cover plate 23 absorbs and stores partial rainwater runoff by utilizing the high porosity and the fiber capillary action of the material, and suspended particle pollutants and organic/inorganic sediments attached to the partial middle and small runoff are removed by physical filtration and provide conditions for the lower anion adsorption layer 21 to play a role, and the runoff after primary filtration passes through the ion exchange function of active groups on the surface of the material when passing through the anion adsorption layer 21, adsorbing and removing a large amount of chloride ions in runoff containing the snow-melting agent, and discharging treated effluent into a surface water retention layer 14 of the biological retention facility 1 through a water outlet pipe 31 at the lower part of the intercepting ditch 2;
rainwater runoff in a surface stagnant water layer 14 of the bioretention facility 1 continuously infiltrates downwards through a planting soil layer 13, a cation adsorption packing layer 12 and a drainage layer 11 along the vertical direction, and is regulated and stored in the facility, and overflow rainwater is collected through an overflow rainwater port 5 and then is drained into a municipal rainwater pipeline;
in the process that rainwater runoff infiltrates in the biological retention facility 1, a large amount of cations (such as Na, K and the like) brought by the snow-melting agent are absorbed through the cation adsorption filler layer 12 filled with granular activated carbon, so that the salt and alkali degree in the facility, particularly in the planting soil layer 13, is further reduced, and the normal physiological activity of organisms in the facility is ensured;
meanwhile, salt-tolerant plants 15 with strong saline-alkali resistance and relatively good pollution purification effect are planted in the bioretention facility 1, so that the overall snow-melting agent damage resistance of the facility is further enhanced.
The invention relates to an improved biological detention facility of a snow-melting-resistant agent, wherein a semi-isolated intercepting ditch 2 is arranged between a main body of the traditional biological detention facility and hardened grounds at two sides, and a runoff storage and ion adsorption material is filled in the intercepting ditch. By the mode, runoff containing the snow-melting agent which is originally and directly discharged into green lands in the bioretention facility is subjected to early interception and regulation in the interception ditch 2, and is discharged into the bioretention facility body after fully absorbing suspended impurities and chloride ions brought by the snow-melting agent. Therefore, the concentration of chloride ions entering the water retaining layer 14 on the surface of the facility and runoff in the planting soil layer 13 can be effectively reduced, and the biological toxicity of the chlorine ions is weakened. Meanwhile, the cation adsorbent is arranged at the lower part of the planting soil layer 13, and cations in the salt of the snow-melting agent are effectively adsorbed and fixed, so that the alkalinity of the pore water of the facility matrix is reduced, and conditions are created for the normal growth of organisms.
On the basis of the rainwater runoff storage and purification function of the traditional bioretention facility, the facility treatment capacity of high-salinity runoff is enhanced, and the facility treatment capacity of the invention has strong application value in the scene of using a large amount of high-salinity substances such as a snow-melting agent in winter.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. An anti-snow melt agent improved bioretention facility comprising:
the biological retention facility is sequentially provided with a drainage layer, a cation adsorption filling layer and a planting soil layer from bottom to top;
at least one vatch basin, the vatch basin is located the lateral wall of biological detention facility, supreme anion adsorbed layer and the reservoir of setting gradually down in the vatch basin, anion adsorbed layer through a plurality of outlet pipes with the top on planting the soil layer is linked together.
2. The improved snow melt agent resistant bioretention facility according to claim 1, wherein the bioretention facility is located on the planting soil layer and is provided with a surface stagnant water layer, and the bottom of the outlet of the water outlet pipe is consistent with the normal water level of the surface stagnant water layer;
and an overflow rainwater port is arranged in the biological retention facility, and the top of a wellhead of the overflow rainwater port is consistent with the normal water level of the surface stagnant water layer.
3. The improved bioretention facility for resisting snow-melting agents as claimed in claim 1, wherein a plurality of grating cover plates are installed on the top of the cut-off trench, and a plurality of grating cover plates are arranged along the length direction of the cut-off trench.
4. The improved snow melt agent resistant bioretention facility of claim 1 wherein the water storage layer includes a plurality of water storage modules, the anion adsorption layer includes a plurality of anion adsorption units, a plurality of the water storage modules are disposed along the longitudinal direction of the cut-off trench, and a plurality of the anion adsorption units are disposed along the longitudinal direction of the cut-off trench.
5. The improved snow melt agent resistant bioretention facility according to claim 4 wherein each of the anion adsorption units is in communication with the surface stagnant layer through the outlet pipe.
6. The improved type of the snow melt agent resistant bioretention facility as claimed in claim 2, wherein a seepage-proof film is arranged on the peripheral wall of the bioretention facility, at least the drainage layer, the cation adsorption filling layer, the planting soil layer and the surface water-retaining layer are arranged in the seepage-proof film from bottom to top in sequence, the top of the seepage-proof film is consistent with the normal water level of the surface water-retaining layer, and a plain soil foundation is arranged at the bottom of the seepage-proof film.
7. The improved type of anti-snow-melting agent bioretention facility as claimed in claim 2, wherein the intercepting ditch includes a pool body, the anion adsorption layer and the water storage layer are sequentially arranged in the pool body from bottom to top, one end of the plurality of water outlet pipes is respectively connected with the anion adsorption layer, and the other end of the plurality of water outlet pipes respectively penetrates through the side wall of the pool body and is communicated with the surface water retaining layer.
8. The improved type of the improved bioretention facility for resisting the snow melting agent as claimed in claim 1, wherein the peripheral wall of the anion absorption layer, the peripheral wall of the water storage layer, the space between the water drainage layer and the cation absorption filling layer, and the space between the cation absorption filling layer and the planting soil layer are all provided with permeable geotextiles.
9. The improved snow melt agent retention facility as claimed in claim 1, wherein the anion adsorption layer is strong base anion exchange resin particles and the cation adsorption packing layer is granular activated carbon.
10. The improved snow melt agent resistant bioretention facility of claim 1 wherein the aquifer is porous cellucotton.
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