CN113896383A - Bank slope surface source pollution treatment system and construction method - Google Patents
Bank slope surface source pollution treatment system and construction method Download PDFInfo
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- CN113896383A CN113896383A CN202111411814.0A CN202111411814A CN113896383A CN 113896383 A CN113896383 A CN 113896383A CN 202111411814 A CN202111411814 A CN 202111411814A CN 113896383 A CN113896383 A CN 113896383A
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- 238000010276 construction Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 149
- 230000008595 infiltration Effects 0.000 claims abstract description 66
- 238000001764 infiltration Methods 0.000 claims abstract description 66
- 238000005325 percolation Methods 0.000 claims abstract description 61
- 238000001914 filtration Methods 0.000 claims abstract description 26
- 239000000945 filler Substances 0.000 claims abstract description 17
- 230000001376 precipitating effect Effects 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 claims description 29
- 239000004576 sand Substances 0.000 claims description 8
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 4
- 229910052902 vermiculite Inorganic materials 0.000 claims description 4
- 235000019354 vermiculite Nutrition 0.000 claims description 4
- 239000010455 vermiculite Substances 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 241000196324 Embryophyta Species 0.000 description 12
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 238000004062 sedimentation Methods 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
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- 238000001556 precipitation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000234643 Festuca arundinacea Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
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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
- C02F2001/007—Processes including a sedimentation step
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The application relates to the technical field of non-point source pollution treatment, in particular to a bank slope non-point source pollution treatment system and a construction method. A system for treating the source pollution of a bank slope comprises a catchment settling area, a water collection settling area and a denitrification and dephosphorization area; the catchment settling area comprises a catchment ditch, the catchment ditch is arranged adjacent to the road along the extending direction of the road, the height of a ditch opening of the catchment ditch is lower than that of the adjacent road, and the catchment ditch is used for planting plants; the water collecting and precipitating area comprises a water collecting ditch and a filtering layer; the denitrification dephosphorization zone comprises a first percolation tank and a second percolation tank; the first percolation pool is horizontally arranged, is positioned at one side of the water collecting ditch close to the bank slope and is communicated with the water collecting ditch; the second infiltration tank is arranged on the bank slope and is communicated with the first infiltration tank; the first percolation pool and the second percolation pool are both provided with filter fillers. The bank slope surface source pollution treatment system is small in occupied area, and the time of rainwater runoff staying in the treatment system can be prolonged, so that the treatment effect of surface source pollution is improved.
Description
Technical Field
The application relates to the technical field of non-point source pollution treatment, in particular to a bank slope non-point source pollution treatment system and a construction method.
Background
With the gradual treatment of point source pollution, the harmfulness of non-point source pollution to water environment is generally concerned by people, and the research of non-point source pollution becomes an active field of the international environmental problem research. Since the non-point source pollution is finally discharged into the river water body, reducing the pollutant content before the non-point source pollution enters the river water body is one of effective means for controlling the non-point source pollution.
Because the bank slope of the urban river channel is mainly hard bank protection and a short slope type, the problems of limited land and poor pollution treatment effect exist.
Disclosure of Invention
The application provides a bank slope surface source pollution treatment system and a construction method, which aim to solve the problems.
The invention is particularly such that:
a system for treating the source pollution of a bank slope comprises a catchment settling area, a water collection settling area and a denitrification and dephosphorization area;
the catchment settling area comprises a catchment ditch, the catchment ditch is arranged adjacent to the road along the extending direction of the road, the height of a ditch opening of the catchment ditch is lower than that of the adjacent road, and the catchment ditch is used for planting plants;
the water collecting and precipitating area comprises a water collecting ditch and a filtering layer; the water collecting ditch is arranged adjacent to the water collecting ditch along the extending direction of the road and is positioned at one side of the water collecting ditch close to the bank slope; the height of the groove opening of the water collecting groove is lower than or equal to that of the water collecting groove, and the filter layer is positioned at the groove opening of the water collecting groove;
the denitrification dephosphorization zone comprises a first percolation tank and a second percolation tank; the first percolation pool is horizontally arranged, is positioned at one side of the water collecting ditch close to the bank slope and is communicated with the water collecting ditch; the second infiltration tank is arranged on the bank slope and is communicated with the first infiltration tank; the first percolation pool and the second percolation pool are both provided with filter fillers.
In one embodiment of the invention, the filter packing comprises one or more of fine sand, coarse sand, gravel, crushed tiles, and crushed brick residue.
In one embodiment of the invention, the filter filler further comprises one or more of turf, vermiculite and limonite.
In one embodiment of the invention, the filtration layer comprises a filtration base layer and a gravel layer; the filtering bottom layer is arranged at the groove opening of the water collecting channel, and the gravel layer is laid on the filtering bottom layer.
In one embodiment of the invention, the height of one side of the water collection ditch close to the road is greater than that of one side of the water collection ditch close to the water collection ditch;
the height of the filter layer is less than or equal to the height of one side of the catchment ditch close to the catchment ditch.
In an embodiment of the invention, the denitrification and dephosphorization region further comprises a plurality of water distribution pipes and a plurality of water guide pipe groups; each water distribution pipe communicates the first percolation pool with the water collection ditch; each water guide pipe group is communicated with the first percolation tank and the second percolation tank;
the plurality of water distribution pipes are sequentially arranged at intervals along the height direction;
a plurality of water guide pipe groups are arranged at intervals in sequence along the height direction, each water guide pipe group comprises a plurality of water guide pipes, and the plurality of water guide pipes of the same water guide pipe group are arranged at intervals in sequence along the extending direction of the bank slope.
In one embodiment of the invention, the denitrification and dephosphorization zone further comprises a plurality of flow guide partition plates and a plurality of supporting foundation piles;
the second infiltration tank is divided into a plurality of infiltration areas by the plurality of diversion clapboards, and the plurality of infiltration areas are conducted from the top of the bank slope to the bottom of the bank slope;
a plurality of supporting foundation piles are all inserted into the bank slope, and each supporting foundation pile is connected with at least one flow guide partition plate.
In one embodiment of the invention, the diversion partition plates are all arranged along the extension direction of the bank slope and are sequentially spaced from the top of the bank slope to the bottom of the bank slope;
each flow guide partition plate is provided with a first end and a second end along the extension direction of the flow guide partition plate; the first end or the second end of one of any two adjacent diversion partition plates is provided with a diversion hole, and the second end or the first end of the other diversion partition plate is provided with a diversion hole.
In one embodiment of the invention, the denitrification and dephosphorization zone further comprises a plurality of flow guide partition plates and a plurality of supporting foundation piles;
the plurality of flow guide partition plates are arranged in the second infiltration tank and are arranged in a grid shape so as to divide the second infiltration tank into a plurality of infiltration areas; each flow guide partition plate is provided with at least one flow guide hole, and any two adjacent percolation areas are communicated with each other;
a plurality of supporting foundation piles are all inserted into the bank slope, and each supporting foundation pile is connected with at least one flow guide partition plate.
A construction method of a bank slope source pollution treatment system is used for building the bank slope source pollution treatment system and comprises the following steps:
along the extending direction of the road, a catchment ditch and a first percolation pool are sequentially arranged on one side of the road close to a bank slope; a second infiltration tank is arranged on the bank slope;
planting plants in the catchment ditch; a permeable filtering bottom layer is erected at the groove opening of the water collecting groove, and gravel is laid on the filtering bottom layer;
a plurality of water distribution pipes for communicating the water collecting channel with the first percolation pool are arranged;
a plurality of water guide pipes for communicating the first infiltration tank with the second infiltration tank are arranged between the first infiltration tank and the second infiltration tank, and soil is backfilled at the top of a bank slope between the first infiltration tank and the second infiltration tank;
installing a plurality of flow guide partition plates and a plurality of supporting foundation piles in the second infiltration tank so as to divide the second infiltration tank into a plurality of infiltration areas; each flow guide partition plate is provided with at least one flow guide hole so that the plurality of infiltration areas are communicated in the direction from the top of the bank slope to the bottom of the bank slope.
The invention has the beneficial effects that:
the system for treating the bank slope source pollution comprises a catchment settling area, a water collection settling area and a denitrification and dephosphorization area;
the catchment settling area comprises a catchment ditch, the catchment ditch is arranged adjacent to the road along the extending direction of the road, the height of a ditch opening of the catchment ditch is lower than that of the adjacent road, and the catchment ditch is used for planting plants;
the water collecting and precipitating area comprises a water collecting ditch and a filtering layer; the water collecting ditch is arranged adjacent to the water collecting ditch along the extending direction of the road and is positioned at one side of the water collecting ditch close to the bank slope; the height of the groove opening of the water collecting groove is lower than or equal to that of the water collecting groove, and the filter layer is positioned at the groove opening of the water collecting groove;
the denitrification dephosphorization zone comprises a first percolation tank and a second percolation tank; the first percolation pool is horizontally arranged, is positioned at one side of the water collecting ditch close to the bank slope and is communicated with the water collecting ditch; the second infiltration tank is arranged on the bank slope and is communicated with the first infiltration tank; the first percolation pool and the second percolation pool are both provided with filter fillers.
From this, through such mode of setting up for the rainwater runoff can flow through catchment sedimentation zone, receipts water sedimentation zone and denitrogenation in proper order and remove the phosphorus district at this bank slope source pollution treatment system, and can increase the dwell time of rainwater runoff in receiving water sedimentation zone and denitrogenation and removing the phosphorus district, thereby can increase the time that the runoff flowed through the filler, and then can increase the treatment effect of pollutant.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a first view angle of a shore slope source pollution abatement system provided by the present application;
fig. 2 is a schematic structural diagram of a second view angle of the shore slope source pollution abatement system provided by the present application;
FIG. 3 is a schematic structural diagram of the water collecting and precipitating zone and the denitrification and dephosphorization zone provided by the present application.
Icon: 100-a shore slope source pollution treatment system; 110-catchment settling area; 120-water collection and precipitation zone; 130-denitrification dephosphorization zone; 111-sink ditch; 10-road; 121-collecting gutters; 122-a filter layer; 131-a first percolating pool; 132-a second percolating chamber; 123-a bottom filter layer; 124-a gravel layer; 133-water distribution pipe; 134-a water conduit group; 135-flow guiding clapboard; 136-supporting foundation piles; 137-percolation region.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1-3, the present invention provides a system 100 for treating a source pollution on a bank slope, comprising a catchment settling area 110, a water collection settling area 120 and a denitrification and dephosphorization area 130;
the catchment settling area 110 comprises a catchment ditch 111, the catchment ditch 111 is arranged adjacent to the road 10 along the extending direction of the road 10, the height of the mouth of the catchment ditch 111 is lower than that of the adjacent road 10, and the catchment ditch 111 is used for planting plants;
the water collecting and precipitating area 120 comprises a water collecting ditch 121 and a filter layer 122; the water collecting ditch 121 is arranged adjacent to the water collecting ditch 111 along the extending direction of the road 10 and is positioned at one side of the water collecting ditch 121 close to the bank slope; the height of the opening of the water collecting channel 121 is lower than or equal to that of the water collecting channel 111, and the filter layer 122 is positioned at the opening of the water collecting channel 121;
the denitrification dephosphorization zone 130 comprises a first percolation tank 131 and a second percolation tank 132; the first percolation chamber 131 is horizontally arranged, is positioned at one side of the water collection ditch 121 close to the bank slope, and is communicated with the water collection ditch 121; the second percolation chamber 132 is arranged on the bank slope and is communicated with the first percolation chamber 131; the first and second percolating chambers 131 and 132 are filled with filter fillers.
The working principle of the shore slope source pollution treatment system 100 is as follows:
referring to fig. 1-3, the system 100 for treating the source pollution on the bank slope comprises a catchment settling area 110, a water collection settling area 120 and a denitrification and dephosphorization area 130;
the catchment settling area 110 comprises a catchment ditch 111, the catchment ditch 111 is arranged adjacent to the road 10 along the extending direction of the road 10, the height of the mouth of the catchment ditch 111 is lower than that of the adjacent road 10, the catchment ditch 111 is used for planting plants, and a gravel layer can be arranged at the bottom of the ditch;
the water collecting and precipitating area 120 comprises a water collecting ditch 121 and a filter layer 122; the water collecting ditch 121 is arranged adjacent to the water collecting ditch 111 along the extending direction of the road 10 and is positioned at one side of the water collecting ditch 121 close to the bank slope; the height of the opening of the water collecting channel 121 is lower than or equal to that of the water collecting channel 111, and the filter layer 122 is positioned at the opening of the water collecting channel 121;
the denitrification dephosphorization zone 130 comprises a first percolation tank 131 and a second percolation tank 132; the first percolation chamber 131 is horizontally arranged, is positioned at one side of the water collection ditch 121 close to the bank slope, and is communicated with the water collection ditch 121; the second percolation chamber 132 is arranged on the bank slope and is communicated with the first percolation chamber 131; the first and second percolating chambers 131 and 132 are filled with filter fillers.
Therefore, by the arrangement mode, the rainwater runoff can sequentially flow through the catchment sedimentation area 110, the water collection sedimentation area 120 and the denitrification and dephosphorization area 130 in the bank slope source pollution treatment system 100, the retention time of the rainwater runoff in the water collection sedimentation area 120 and the denitrification and dephosphorization area 130 can be prolonged, the time of the runoff flowing through the filler can be prolonged, and the treatment effect of pollutants can be improved.
It should be noted that, in the present embodiment, the flow process (as shown by the arrow in fig. 2) of the rainwater runoff in the shore slope source pollution treatment system 100 is as follows:
referring to fig. 1-3, firstly, the runoff water collects in the catchment ditch 111 of the catchment settling area 110, and flows over the surface of the catchment ditch 111, and since plants are planted in the catchment ditch 111, the first filtration treatment can be performed on the rainwater in such a way, and the first sedimentation can be performed in the catchment ditch 111, and the degradation of organic matters carried by part of the runoff water of the initial rain is completed by microorganisms in the biological membrane of the plant stem base;
since the height of the opening of the water collecting channel 121 is less than or equal to the height of the opening of the water collecting channel 111, and the height of the opening of the water collecting channel 111 is less than the height of the adjacent road 10, the rainwater filtered and precipitated in the water collecting channel 111 flows into the water collecting channel 121;
rainwater flowing to the water collecting ditch 121 flows into the water collecting ditch 121 after passing through the filter layer 122; thus, the rainwater can be filtered for the second time by the filtering layer 122 and precipitated for the second time in the water collecting channel 121;
because the first percolation pool 131 is horizontal and communicated with the water collection ditch 121, water in the water collection ditch 121 flows into the first percolation pool 131, and because the first percolation pool 131 is internally provided with filtering fillers, rainwater can be filtered for the third time through the filtering fillers, and meanwhile, rainwater in the first percolation pool 131 is precipitated for the third time in the first percolation pool 131;
because the second percolation pool 132 is communicated with the first percolation pool 131, rainwater in the first percolation pool 131 can enter the second percolation pool 132, and because the second percolation pool 132 is internally provided with filtering fillers, rainwater can be filtered for a fourth time through the filtering fillers, and meanwhile, rainwater in the second percolation pool 132 is precipitated for a fourth time in the second percolation pool 132; and finally flows out through a water outlet pipe which is positioned at the toe of the bank slope and communicated with the second infiltration tank 132.
In summary, through the above steps, the rainwater can stay in the catchment settling zone 110, the collected water settling zone 120 and the denitrification and dephosphorization zone 130, so as to increase the treatment time of the pollutants, further reduce the occupied area of the system and improve the treatment effect of the pollutants on the premise of utilizing the limited bank slope resources in the city.
It should be noted that, firstly, in the above description, the rainwater may flow through the catchment settling area 110, the water collection settling area 120 and the denitrification and dephosphorization area 130 in sequence under the action of gravity, and in this embodiment, the retention time of the rainwater in the system may be controlled by controlling the blocking or conducting of the conducting paths among the catchment settling area 110, the water collection settling area 120 and the denitrification and dephosphorization area 130, and by controlling the regulating valve arranged on the water outlet pipe communicated with the second percolation tank 132 at the slope toe of the bank slope, so as to adapt to the pollutant treatment under different conditions;
secondly, the plants planted in the catchment ditch 111 can be selected from the herbaceous plants with harder rod diameters such as festuca arundinacea or reed, the width of the catchment ditch 111 can be 0.5m to 1.5m, the first precipitation interception function is carried out on rainwater runoff gathered from roads 10 and the like on two sides of a river channel, the planting density is more than 500 plants/m 2, and the plant height is more than 0.38 m;
in addition, when the filter layer 122 is disposed, the filter layer 122 may include a filter bottom layer 123 and a gravel layer 124; the filtering bottom layer 123 is arranged at the groove opening of the water collecting groove 121, and the gravel layer 124 is laid on the filtering bottom layer 123; the width of the water collecting channel 121 can be 0.5m-1.5m, and the filtering bottom layer 123 can be a rainwater grate, that is, the filtering bottom layer 123 has water permeability, the gravel layer 124 can filter out impurities, and the filtering bottom layer 123 can prevent the impurities from entering the water collecting channel 111, thereby ensuring the water quality effect.
In addition, in order to guide the rainwater in the catchment ditch 111 to flow to the catchment ditch 121, the height of the side of the catchment ditch 111 close to the road 10 is greater than that of the side of the catchment ditch 111 close to the catchment ditch 121; the height of the filter layer 122 is less than or equal to the height of the side of the water collecting channel 111 close to the water collecting channel 121. Thereby preventing water in the water collection trench 121 from flowing back to the road 10.
Further, referring to fig. 1-3, in the present embodiment, when the first and second percolators 131 and 132 of the denitrification and dephosphorization zone 130 are packed, the filter packing may include one or more of fine sand, coarse sand, gravel, broken tiles, and broken brick slag. And the filter filler needs to be mixed with one or more of turf, vermiculite and limonite to enhance the nitrogen and phosphorus removal effect.
It should be noted that, when the first percolation tank 131 and the second percolation tank 132 are arranged, they may be laid according to available sites of the bank slope, and they may be inserted into landscape greening facilities of the bank slope, and the filter filler may be made of fine sand, coarse sand, gravel, broken tiles or broken brick slag, and for enhancing the denitrification and dephosphorization effect, it is also necessary to mix grass carbon and vermiculite (particle size: 5-10mm), limonite (particle size: 10-30mm) and other substrates, and the mixing ratio is not more than 50%, and different particle sizes form a certain gradation filling, and the filling depth is 0.6m-1 m.
Further, referring to fig. 1-3, in order to communicate the water collecting channel 121 with the first percolating chamber 131 and communicate the first percolating chamber 131 with the second percolating chamber 132, the denitrification and dephosphorization zone 130 further includes a plurality of water distributing pipes 133 and a plurality of water guiding pipe groups 134; each water distribution pipe 133 communicates the first percolation chamber 131 with the water collection trench 121; each water guide pipe group 134 communicates the first and second infiltration chambers 131 and 132;
wherein, the plurality of water distribution pipes 133 are arranged at intervals in sequence along the height direction; the plurality of water guide pipe groups 134 are sequentially arranged at intervals in the height direction, each water guide pipe group 134 comprises a plurality of water guide pipes, and the plurality of water guide pipes of the same water guide pipe group 134 are sequentially arranged at intervals in the extending direction of the bank slope.
Further, referring to fig. 1-3, in the present embodiment, in order to improve the treatment effect of the pollutants, the denitrification and dephosphorization zone 130 further includes a plurality of baffles 135 and a plurality of supporting piles 136; the second infiltration tank 132 is divided into a plurality of infiltration areas 137 by a plurality of diversion clapboards 135, and the plurality of infiltration areas 137 are conducted from the top of the bank slope to the bottom of the bank slope; a plurality of supporting foundation piles 136 are inserted into the bank slope, and each supporting foundation pile 136 is connected with at least one diaphragm 135.
Therefore, by the arrangement mode, each infiltration area 137 can filter and precipitate rainwater, so that the treatment effect of the dye can be improved, and the stability of the denitrification and dephosphorization area 130 can be improved by arranging a plurality of supporting foundation piles 136; specifically, in the present embodiment, the plurality of baffle plates 135 are all disposed along the extending direction of the bank slope, and are sequentially spaced from the top of the bank slope to the bottom of the bank slope; along the extending direction of the baffle plates 135, each baffle plate 135 has a first end and a second end; the first end or the second end of one of any two adjacent baffle plates 135 is provided with a flow guide hole, and the second end or the first end of the other one is provided with a flow guide hole.
And then through such mode of setting for the rainwater can be by every infiltration zone 137 of the direction of bank slope's top of slope to base of slope in proper order, promptly, makes the route of flowing through of rainwater be the Z style of calligraphy, and then can increase the dwell time of rainwater, thereby can promote the treatment effect of dyeing thing.
In addition, in other embodiments of the present invention, the denitrification and dephosphorization zone 130 further comprises a plurality of baffles 135 and a plurality of supporting piles 136; different from the arrangement of the diversion partition plates 135, a plurality of diversion partition plates 135 are arranged on the second infiltration tank 132, and the diversion partition plates 135 are arranged in a grid shape to divide the second infiltration tank 132 into a plurality of infiltration areas 137; each flow guide partition plate 135 is provided with at least one flow guide hole, and any two adjacent percolation areas 137 are communicated with each other; a plurality of supporting foundation piles 136 are inserted into the bank slope, and each supporting foundation pile 136 is connected with at least one diaphragm 135.
Namely, through such a setting mode, the rainwater not only can flow through each infiltration zone 137 in proper order by the direction of the crest to the toe of bank slope, can also flow through a plurality of infiltration zones 137 in proper order along the extending direction of bank slope, and then can increase the dwell time of rainwater, thereby can promote the treatment effect of dyestuffs.
Based on the above, referring to fig. 1 to fig. 3, the present invention further provides a construction method of a bank slope source pollution treatment system 100, for constructing the bank slope source pollution treatment system 100, including:
along the extending direction of the road 10, a catchment ditch 111, a catchment ditch 121 and a first percolation pond 131 are sequentially arranged on one side of the road 10 close to a bank slope; a second infiltration tank 132 is arranged on the bank slope;
planting plants in the catchment ditch 111; a permeable filter bottom layer 123 is built at the groove opening of the water collecting groove 121, and gravels are paved on the filter bottom layer 123;
a plurality of water distribution pipes 133 which communicate the water collecting ditch 121 with the first infiltration pond 131 are arranged;
a plurality of aqueducts which are used for communicating the first infiltration tank 131 with the second infiltration tank 132 are arranged between the first infiltration tank 131 and the second infiltration tank 132, and soil is back filled at the top of the bank slope between the first infiltration tank 131 and the second infiltration tank 132;
installing a plurality of guide partition plates 135 and a plurality of support foundation piles 136 in the second infiltration tank 132 to divide the second infiltration tank 132 into a plurality of infiltration zones 137; each baffle 135 is formed with at least one baffle hole to allow the plurality of percolation regions 137 to be conducted from the top of the bank slope to the bottom of the bank slope.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A bank slope surface source pollution treatment system is characterized in that:
the land slope source pollution treatment system comprises a catchment settling area, a water collection settling area and a denitrification and dephosphorization area;
the catchment settling area comprises a catchment ditch, the catchment ditch is arranged adjacent to the road along the extending direction of the road, the height of a ditch opening of the catchment ditch is lower than that of the adjacent road, and the catchment ditch is used for planting plants;
the water collecting and precipitating area comprises a water collecting ditch and a filtering layer; the water collecting ditch is arranged adjacent to the water collecting ditch along the extending direction of the road and is positioned on one side of the water collecting ditch close to the bank slope; the height of the groove opening of the water collecting groove is lower than or equal to that of the water collecting groove, and the filter layer is positioned at the groove opening of the water collecting groove;
the denitrification dephosphorization zone comprises a first percolation tank and a second percolation tank; the first percolation pool is horizontally arranged, is positioned on one side of the water collecting ditch close to the bank slope and is communicated with the water collecting ditch; the second infiltration tank is arranged on the bank slope and is communicated with the first infiltration tank; and the first percolation pool and the second percolation pool are internally provided with filtering fillers.
2. The shore slope source pollution abatement system of claim 1, wherein:
the filter filler comprises one or more of fine sand, coarse sand, gravel, broken tiles and broken brick residues.
3. The shore slope source pollution abatement system of claim 2, wherein:
the filter filler also comprises one or more of turf, vermiculite and limonite.
4. The shore slope source pollution abatement system of claim 1, wherein:
the filter layer comprises a filter bottom layer and a gravel layer; the filtering bottom layer is arranged at the groove opening of the water collecting channel, and the gravel layer is laid on the filtering bottom layer.
5. The shore slope source pollution abatement system of claim 1, wherein:
the height of one side of the catchment ditch close to the road is greater than that of one side of the catchment ditch close to the catchment ditch;
the height of the filter layer is less than or equal to the height of one side of the water collecting ditch close to the water collecting ditch.
6. The shore slope source pollution abatement system of claim 1, wherein:
the denitrification dephosphorization zone also comprises a plurality of water distribution pipes and a plurality of water guide pipe groups; each water distribution pipe is used for communicating the first percolation pool with the water collecting channel; each water guide pipe group is used for communicating the first percolation tank with the second percolation tank;
the water distribution pipes are sequentially arranged at intervals along the height direction;
the water guide pipe groups are arranged at intervals in sequence along the height direction, each water guide pipe group comprises a plurality of water guide pipes, and the water guide pipes are arranged at intervals in sequence along the extending direction of the bank slope.
7. The shore slope source pollution abatement system of any one of claims 1-6, wherein:
the denitrification dephosphorization zone also comprises a plurality of flow guide partition plates and a plurality of supporting foundation piles;
the second infiltration tank is divided into a plurality of infiltration areas by the plurality of diversion clapboards, and the plurality of infiltration areas are conducted from the top of the bank slope to the bottom of the bank slope;
and the supporting foundation piles are all inserted into the bank slope, and each supporting foundation pile is connected with at least one flow guide partition plate.
8. The shore slope source pollution abatement system of claim 7, wherein:
the diversion clapboards are arranged along the extending direction of the bank slope and are sequentially spaced from the top of the bank slope to the bottom of the bank slope;
along the extending direction of the flow guide partition plates, each flow guide partition plate is provided with a first end and a second end; the first end or the second end of one of any two adjacent diversion partition plates is provided with a diversion hole, and the second end or the first end of the other diversion partition plate is provided with the diversion hole.
9. The shore slope source pollution abatement system of any one of claims 1-6, wherein:
the denitrification dephosphorization zone also comprises a plurality of flow guide partition plates and a plurality of supporting foundation piles;
the plurality of flow guide partition plates are arranged on the second infiltration tank and are arranged in a grid shape so as to divide the second infiltration tank into a plurality of infiltration areas; each flow guide partition plate is provided with at least one flow guide hole, and any two adjacent infiltration areas are communicated with each other;
and the supporting foundation piles are all inserted into the bank slope, and each supporting foundation pile is connected with at least one flow guide partition plate.
10. A construction method of a shore slope source pollution abatement system for constructing the shore slope source pollution abatement system of any one of claims 1-9, comprising:
along the extending direction of the road, a catchment ditch and a first percolation pool are sequentially arranged on one side of the road close to a bank slope; a second infiltration tank is arranged on the bank slope;
planting plants in the catchment ditch; a permeable filtering bottom layer is erected at the groove opening of the water collecting groove, and gravels are paved on the filtering bottom layer;
a plurality of water distribution pipes which communicate the water collecting channel with the first percolation pool are arranged;
installing a plurality of water guide pipes for communicating the first infiltration tank with the second infiltration tank between the first infiltration tank and the second infiltration tank, and backfilling soil at the top of the bank slope between the first infiltration tank and the second infiltration tank;
installing a plurality of flow guide partition plates and a plurality of supporting foundation piles in the second infiltration tank so as to divide the second infiltration tank into a plurality of infiltration areas; each diversion clapboard is provided with at least one diversion hole so that the plurality of infiltration areas are communicated from the top of the bank slope to the bottom of the bank slope.
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Application publication date: 20220107 |