CN110980959A - Artificial wetland with strong self-adaptive capacity and preparation method thereof - Google Patents
Artificial wetland with strong self-adaptive capacity and preparation method thereof Download PDFInfo
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- CN110980959A CN110980959A CN201911397230.5A CN201911397230A CN110980959A CN 110980959 A CN110980959 A CN 110980959A CN 201911397230 A CN201911397230 A CN 201911397230A CN 110980959 A CN110980959 A CN 110980959A
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- 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
Abstract
The invention discloses an artificial wetland with strong self-adaptive capacity and a preparation method thereof, and particularly relates to the technical field of environmental management. The invention can make the artificial wetland according to the different water areas and water sources, to ensure the purification effect and environment treatment of the water areas, and to form a complete ecological environment system.
Description
Technical Field
The invention relates to the technical field of environmental management, in particular to an artificial wetland with strong self-adaptive capacity and a preparation method thereof.
Background
The artificial wetland is a technology for treating sewage and sludge by using the physical, chemical and biological triple synergistic action of soil, artificial medium, plants and microorganisms in the process of flowing along a certain direction by using sewage and sludge which are controllably dosed to the artificially constructed wetland from the artificially constructed and controlled-operation ground similar to the marshland. The action mechanism of the plant nutrient solution comprises the actions of adsorption, detention, filtration, oxidation reduction, precipitation, microbial decomposition, transformation, plant shielding, residue accumulation, transpiration moisture and nutrient absorption and various animals.
The artificial wetland is a comprehensive ecological system, which applies the principles of species symbiosis and material cycle regeneration in the ecological system and the coordination principle of structure and function, fully exerts the production potential of resources on the premise of promoting the virtuous cycle of pollutants in wastewater, prevents the re-pollution of the environment and obtains the best benefits of sewage treatment and resource utilization; the plants of the artificial wetland can also convey oxygen for the water body, so that the activity of the water body is increased. The wetland plants play an important role in controlling water quality pollution and degrading harmful substances; the microorganisms in the wetland system are the main force for degrading pollutants in the water body. Aerobic microorganisms decompose most organic matters in wastewater into carbon dioxide and water through respiration, anaerobic bacteria decompose organic matters into carbon dioxide and methane, nitrifying bacteria nitrify ammonium salts, denitrifying bacteria reduce nitrate nitrogen into nitrogen, and the like. Through the series of actions, main organic pollutants in the sewage can be degraded and assimilated to become a part of microbial cells, and the rest of inorganic substances which are harmless to the environment return to the nature.
The existing artificial wetland has a single form in the manufacturing process, cannot meet the water area purification effect under different pollution conditions or cannot form a better ecological environment system under the treatment, and the treatment efficacy is greatly reduced.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide an artificial wetland with strong adaptive capacity and a preparation method thereof, and the technical problem to be solved by the present invention is: the type of the artificial wetland is determined according to the environment of the water area so as to ensure the applicability of the artificial wetland to the environment.
In order to achieve the purpose, the invention provides the following technical scheme: an artificial wetland with strong self-adaptive capacity comprises a first canal and a second canal, wherein an anti-seepage bottom plate is arranged between the first canal and the second canal, a water seepage layer is arranged at the top of the anti-seepage bottom plate, a first filtering layer is arranged at the top of the water seepage layer, first coarse filtering layers are arranged on two sides of the water seepage layer and two sides of the first filtering layer, a water inlet pipe is arranged between the top of one side, close to the anti-seepage bottom plate, of the first canal and the first coarse filtering layers, a water outlet pipe is arranged between the bottom of one side, close to the anti-seepage bottom plate, of the second canal and the first coarse filtering layers, a water outlet pipe is arranged at the bottom of one side, far away from the anti-seepage bottom plate, of the second canal, and a first planting layer is;
the water inlet pipe penetrates through the first water channel to be connected with the inner cavity of the first water channel, the water outlet pipe and the water drain pipe both penetrate through the second water channel to be connected with the inner cavity of the second water channel, and the height of the top end of the water drain pipe is matched with that of the water inlet pipe, so that the flow direction of sewage can be ensured, and secondary pollution of a water source caused by reverse flow of the water source can be avoided;
first coarse filtration layer is including accomodating the cylinder mould, it has a plurality of cage meshes to accomodate evenly distributed on the cylinder mould.
As shown in fig. 1-2, the embodiment specifically is: the sewage in the first water channel is gathered to exceed the height of the water inlet pipe and is discharged into the first coarse filtering layer through the water inlet pipe, large impurities, duckweed and the like are filtered through the gravel clearance, the sewage is filtered in one round and flows to the position of the first filtering layer, the sewage is re-filtered through fine sand and oxidized by manganese sand to the metal ions in the sewage, the softening effect of the sewage is achieved, the purpose of removing harmful substances such as iron, manganese, arsenic and the like in the water can be achieved without adding any chemical agent, the purified water flow is discharged into the second water channel through the water outlet pipe through the water seepage layer and the permeation of the first coarse filtering layer, the polluted impurities are remained in the first filtering layer and the first coarse filtering layer, if the water source is continuously supplied in the first water channel, the water level in the second water channel is lifted to the top end of the water drain pipe, the purified water source is discharged out of the second water channel through the drain pipe, the sewage treatment and discharge effect is achieved, if the water source is not continuously supplied in the first water channel, the water in the second ditch can be reversely supplied to the water seepage layer and the first filtering layer through the water outlet pipe, the water is supplied to the plant ash and the retained pollution impurities, the decomposition rate of the plant ash is accelerated, the nutrients are provided for the first planting layer, and the hydrolyzed plant ash can sterilize microorganisms in the retained pollution impurities to decompose the microorganisms, so that the effect of supplying the nutrients to the first planting layer is achieved, and the growth effect of plants on the top of the first planting layer is ensured.
In a preferred embodiment, the receiving cylinder cage is internally filled with block-shaped gravels, the diameter of the block-shaped gravels is larger than the pore diameter of the meshes of the cage, and the block-shaped gravels are prevented from falling out of the meshes of the cage when being filled.
In a preferred embodiment, accomodate the cylinder mould and weave by the stainless steel wire and form, the thickness of infiltration layer and first filter layer and with accomodate the cylinder mould height and equal, can guarantee the structural stability of first coarse filtration layer, prevent that the corrosion from causing and collapse, can guarantee in addition that the bed thickness on first planting layer is even, makes things convenient for the plant to plant.
In a preferred embodiment, the first water channel, the second water channel and the impermeable bottom plate are all integrally cast and formed by C30 concrete, and the drainage pipe is arranged in an L shape.
In a preferred embodiment, the water seepage layer is formed by stacking coarse sand materials, the first filter layer is formed by stacking fine sand, manganese sand and plant ash materials, the manganese sand has the effect of purifying sewage, and the plant ash can provide fertility and a certain sterilization effect.
The invention also discloses a preparation method of the constructed wetland with strong self-adaptive capacity, which comprises the following specific preparation steps:
s1, investigating water source types in the field: carrying out field on-site investigation on the water area of the artificial wetland to be developed, and judging the water source quality and water quantity of the water area;
s2, rebuilding the artificial wetland:
s2.1: according to the result of the step S1, if the water source is a small water quantity water body without foul smell, a second water channel tunnel parallel to the water source can be opened along the water source;
s2.2: digging a foundation pit between a water source and a second water channel tunnel, respectively manufacturing the water source into a first water channel by using C30 concrete, manufacturing and molding the second water channel tunnel, and pouring and molding an impermeable bottom plate;
s2.3: after the first water channel, the second water channel and the anti-seepage base plate are hardened and formed in the step S2.2, selecting block gravels with proper sizes to be placed in a containing net cage, then sealing with iron wires to prepare a first coarse filtering layer, and respectively placing the first coarse filtering layer on two sides of a cavity formed by the first water channel, the second water channel and the anti-seepage base plate;
s2.4: filling coarse sand between the two first coarse filtering layers, and compacting to form a water seepage layer;
s2.5: mixing fine sand, manganese sand and plant ash according to a proportion by using a stirring device, and then putting the mixture into the top of a water seepage layer to form a first filter layer through compaction;
s2.6: backfilling the excavated soil to the top of the first filter layer and the first coarse filter layer, and spreading and compacting to form a first planting layer;
s3, planting green plants: and planting reed, water hyacinth and cattail on the top of the first planting layer.
In a preferred embodiment, the ratio of fine sand, manganese sand and plant ash in step S2.5 is 8-9:0.3-0.5: 1-1.5.
In a preferred embodiment, the thickness of the first planting layer after compacting in step S2.6 is not less than 50cm, so as to avoid that the roots of the green plants are affected by the too shallow first planting layer, and the green plants are toppled to affect the survival of the green plants.
The invention has the technical effects and advantages that:
the invention ensures the purification effect and the treatment environment of the water area, ensures the formation of a complete ecological environment system and ensures the treatment efficacy of the artificial wetland by manufacturing the artificial wetland according to the difference of the water area and the water source.
Drawings
Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a first rough filtration layer in embodiment 1 of the present invention.
Fig. 3 is a schematic view of the overall structure of embodiment 2 of the present invention.
Fig. 4 is a schematic view of the overall structure of embodiment 3 of the present invention.
The reference signs are: 11 a first canal, 12 a second canal, 13 an anti-seepage base plate, 14 a water seepage layer, 15 a first filtering layer, 16 a first coarse filtering layer, 161 storage net cage, 162 net holes, 17 water inlet pipe, 18 water outlet pipe, 19 water outlet pipe, 110 a first planting layer, 25 a second filtering layer, 26 a second coarse filtering layer, 210 a second planting layer, 31 a third canal, 35 a third filtering layer and 310 a third planting layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
Example 1:
the invention provides an artificial wetland with strong self-adaptive capacity, which comprises a first water channel 11 and a second water channel 12, wherein an anti-seepage base plate 13 is arranged between the first water channel 11 and the second water channel 12, a water seepage layer 14 is arranged at the top of the anti-seepage base plate 13, a first filter layer 15 is arranged at the top of the water seepage layer 14, first coarse filter layers 16 are arranged on two sides of the water seepage layer 14 and the first filter layer 15, a water inlet pipe 17 is arranged between the top of one side of the first water channel 11, which is close to the anti-seepage base plate 13, and the first coarse filter layer 16, a water outlet pipe 18 is arranged between the bottom of one side of the second water channel 12, which is close to the anti-seepage base plate 13, and the first coarse filter layer 16, a water outlet pipe 19 is arranged at the bottom of one side of the second water channel 12, which is far away from the anti-seepage base plate 13;
the first coarse filtration layer 16 comprises a storage cylinder mould 161, and a plurality of cylinder mould meshes 162 are uniformly distributed on the storage cylinder mould 161.
The containing net cage 161 is filled with block gravels, the diameter of the block gravels is larger than the aperture of the cage mesh 162, the containing net cage 161 is woven by stainless steel wires, the thickness of the water seepage layer 14 and the first filter layer 15 is equal to the height of the containing net cage 161, the first water channel 11, the second water channel 12 and the anti-seepage bottom plate 13 are all formed by integrally pouring C30 concrete, the water inlet pipe 17 penetrates through the first water channel 11 and is connected with the inner cavity of the first water channel 11, the water outlet pipe 18 and the water outlet pipe 19 both penetrate through the second water channel 12 and are connected with the inner cavity of the second water channel 12, the water outlet pipe 19 is in an L shape, the secondary pollution of a water source caused by the reverse flow of the water source can be avoided, the water seepage layer 14 is formed by stacking coarse sand materials, and the first filter layer 15 is formed by stacking fine sand, manganese sand and plant ash materials;
the invention also discloses a preparation method of the constructed wetland with strong self-adaptive capacity, which comprises the following specific preparation steps:
s1, investigating water source types in the field: carrying out field on-site investigation on the water area of the artificial wetland to be developed, and judging the water source quality and water quantity of the water area;
s2, rebuilding the artificial wetland:
s2.1: according to the result of the step S1, if the water source is a small water volume without offensive odor, a second channel 12 may be opened along the water source in parallel with the water source;
s2.2: digging a foundation pit between a water source and the second ditch 12 tunnel, respectively manufacturing the water source into a first ditch 11 by using C30 concrete, manufacturing and molding the second ditch 12 tunnel, and pouring and molding the anti-seepage bottom plate 13;
s2.3: after the first water channel 11, the second water channel 12 and the anti-seepage base plate 13 are hardened and formed in the step S2.2, block gravels with proper sizes are selected and placed into the containing net cage 161, and then the first coarse filter layer 16 is made by sealing with iron wires and is respectively placed on two sides of a cavity formed by the first water channel 11, the second water channel 12 and the anti-seepage base plate 13;
s2.4: coarse sand is filled between the two first coarse filter layers 16, and a water seepage layer 14 is formed after compaction;
s2.5: mixing fine sand, manganese sand and plant ash according to the proportion of 8-9:0.3-0.5:1-1.5 by using a stirring device, and then putting the mixture into the top of a water seepage layer 14 to form a first filtering layer 15 through compaction;
s2.6: backfilling the excavated soil to the top of the first filtering layer 15 and the first coarse filtering layer 16, and spreading and compacting to form a first planting layer 110 with the thickness of not less than 50 cm;
s3, planting green plants: reed, water hyacinth and cattail are planted on top of the first planting layer 110.
As shown in fig. 1-2, the embodiment specifically is: the sewage in the first ditch 11 gathers to exceed the height of the water inlet pipe 17 and is discharged into the first coarse filter layer 16 through the water inlet pipe 17, the large impurities, duckweed and the like are filtered through the gravel clearance, the sewage flows to the position of the first filter layer 15 in one round of filtering, the softening effect on the sewage is achieved through the re-filtering of fine sand and the oxidation of metal ions in the sewage by manganese sand, the harmful substances such as iron, manganese, arsenic and the like in the water can be removed without adding any chemical agent, the purified water flows through the water seepage layer 14 and the first coarse filter layer 16 and is discharged into the second ditch 12 through the water outlet pipe 18, the polluted impurities are retained in the first filter layer 15 and the first coarse filter layer 16, if the water source is continuously supplied into the first ditch 11, the water level in the second ditch 12 is lifted to the top end of the water outlet pipe 19, the purified water source is discharged out of the second ditch 12 through the water outlet pipe 19, and the sewage treatment and discharge effect is achieved, if the water source in the first channel 11 is continuously supplied, the water in the second channel 12 can be reversely supplied to the positions of the water seepage layer 14 and the first filter layer 15 through the water outlet pipe 18, the water is supplied to the plant ash and the retained pollution impurities, the decomposition rate of the plant ash and the retained pollution impurities is accelerated, the nutrients are provided for the first planting layer 110, and the hydrolyzed plant ash can sterilize microorganisms in the retained pollution impurities to decompose the microorganisms, so that the effect of supplying the nutrients to the first planting layer 110 is achieved, and the growth effect of plants on the top of the first planting layer 110 is ensured.
Example 2:
the invention provides an artificial wetland with strong self-adaptability, which comprises a second planting layer 210, wherein a second filtering layer 25 is arranged at the top of the second planting layer 210, a second coarse filtering layer 26 is arranged on the outer edge of the second planting layer 210, the second coarse filtering layer 26 is formed by stacking massive gravels, the height of the second coarse filtering layer 26 is greater than that of the second coarse filtering layer 26, and the second filtering layer 25 is formed by stacking fine sand, manganese sand and plant ash materials;
the invention also discloses a preparation method of the constructed wetland with strong self-adaptive capacity, which comprises the following specific preparation steps:
s1, investigating water source types in the field: carrying out field on-site investigation on the water area of the artificial wetland to be developed, and judging the water source quality and water quantity of the water area;
s2, rebuilding the artificial wetland:
s2.1: according to the result of the step S1, if the water source is a large-volume water body without foul smell, the second planting layer 210 can be enclosed and piled into a high-slope block gravel enclosure shape by using block gravel along the water source;
s2.2: mixing the fine sand, the manganese sand and the plant ash according to the proportion of 8-9:0.3-0.5:1-1.5 by using a stirring device, and then putting the mixture on the top of the second planting layer 210 to form a second filtering layer 25 through compaction;
s3, planting green plants: reed, water hyacinth and cattail are planted on the top of the second planting layer 210.
As shown in fig. 3, the embodiment specifically includes: water at a water source is filtered through gravel gaps to filter large impurities, duckweeds and the like, sewage is filtered in one round to flow to the position of the second filtering layer 25, metal ions in the sewage are oxidized through manganese sand to achieve the effect of softening the sewage, the purpose of removing harmful substances such as iron, manganese and arsenic in the water can be achieved without adding any chemical agent, the filtered sewage in the one round is mixed with plant ash to provide nutrients for the second planting layer 210, and the hydrolyzed plant ash can perform a sterilization function on microorganisms in the filtered sewage in the one round to decompose the microorganisms so as to achieve the effect of supplying the nutrients to the second planting layer 210, and with the continuous supply of water, redundant purified water can flow out again through the gravel gaps.
Example 3:
the invention provides an artificial wetland with strong self-adaptability, which comprises a third planting layer 310, wherein a third water channel 31 is arranged in the third planting layer 310, a third filter layer 35 is arranged at the bottom of the third water channel 31, and the third filter layer 35 is formed by piling fine sand, manganese sand and plant ash materials;
the invention also discloses a preparation method of the constructed wetland with strong self-adaptive capacity, which comprises the following specific preparation steps:
s1, investigating water source types in the field: carrying out field on-site investigation on the water area of the artificial wetland to be developed, and judging the water source quality and water quantity of the water area;
s2, rebuilding the artificial wetland:
s2.1: according to the result of the examination in the step S1, if the water source is a severely odorous water body, a third channel 31 can be excavated in the third planting layer 310 along the water source flow direction;
s2.2: mixing fine sand, manganese sand and plant ash according to the proportion of 8-9:0.3-0.5:1-1.5 by using a stirring device, and then putting the mixture into the bottom of a channel of the third ditch 31 to compact the mixture to form a third filter layer 35;
s2.3: c30 concrete is used for pouring and forming the third water channel 31 on the top of the third filter layer 35, the excavated soil is backfilled and leveled after the third filter layer is hardened and formed, and water is guided to the opening of the third water channel 31;
s3, planting green plants: reed, water hyacinth and cattail are planted on the top of the third planting layer 310.
As shown in fig. 4, the embodiment specifically includes: the stink water source flows in through the opening of the third water channel 31 and contacts with the third filter layer 35, metal ions in the sewage are oxidized by the manganese sand, the sewage is softened, harmful substances such as iron, manganese and arsenic in the water can be removed without adding any chemical agent, the sewage and plant ash are mixed and permeate to the third planting layer 310 to provide nutrients for green plants, and the hydrolyzed plant ash can sterilize microorganisms in the sewage to decompose the microorganisms, so that the effect of supplying the nutrients to the third planting layer 310 is achieved.
In summary, the following steps: the constructed wetland in the embodiment 1 is a vertical flow type constructed wetland, so that the hydraulic retention time can be effectively prolonged, and the treatment effect is improved; the constructed wetland in the embodiment 2 is a surface flow type constructed wetland, and water flows over surface layer filter materials in a diffuse flow mode, so that the constructed wetland has the characteristics of strong flow capacity, strong adaptability and easiness in maintenance; the constructed wetland in the embodiment 3 is an undercurrent type constructed wetland, plants are planted above the water body overflowing surface, and the filter materials are not below the surface soil, so that odor and insect pests can be effectively avoided; the artificial wetland is made according to different water areas and water sources so as to ensure the purification effect and the treatment environment of the water areas, ensure the formation of a complete ecological environment system and ensure the treatment efficacy of the artificial wetland.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. The constructed wetland with strong self-adaptive capacity is characterized in that: comprises a first canal (11) and a second canal (12), an anti-seepage bottom plate (13) is arranged between the first canal (11) and the second canal (12), a water seepage layer (14) is arranged at the top of the anti-seepage bottom plate (13), a first filter layer (15) is arranged at the top of the water seepage layer (14), a first coarse filtering layer (16) is arranged on both sides of the water seepage layer (14) and the first filtering layer (15), a water inlet pipe (17) is arranged between the top of one side of the first ditch (11) close to the anti-seepage bottom plate (13) and the first coarse filtering layer (16), a water outlet pipe (18) is arranged between the bottom of one side of the second ditch (12) close to the anti-seepage base plate (13) and the first coarse filter layer (16), a drain pipe (19) is arranged at the bottom of one side of the second ditch (12) far away from the anti-seepage bottom plate (13), a first planting layer (110) is arranged on the top of the first filtering layer (15) and the first coarse filtering layer (16);
the water inlet pipe (17) penetrates through the first water channel (11) and is connected with the inner cavity of the first water channel (11), the water outlet pipe (18) and the water outlet pipe (19) both penetrate through the second water channel (12) and are connected with the inner cavity of the second water channel (12), and the top end of the water outlet pipe (19) is matched with the height of the water inlet pipe (17);
first coarse filtration layer (16) are including accomodating cylinder mould (161), it has a plurality of cage mesh (162) to accomodate evenly distributed on cylinder mould (161).
2. The constructed wetland of claim 1, which is characterized in that: the receiving net cage (161) is filled with block-shaped gravels, and the diameter of the block-shaped gravels is larger than the pore diameter of the cage mesh (162).
3. The constructed wetland of claim 1, which is characterized in that: accomodate cylinder mould (161) and weave by the stainless steel wire and form, the thickness of infiltration layer (14) and first filter layer (15) with accomodate cylinder mould (161) height equal.
4. The constructed wetland of claim 1, which is characterized in that: the first water channel (11), the second water channel (12) and the anti-seepage bottom plate (13) are all formed by pouring C30 concrete integrally, and the drain pipe (19) is arranged in an L shape.
5. The constructed wetland of claim 1, which is characterized in that: the water seepage layer (14) is formed by piling coarse sand materials, and the first filter layer (15) is formed by piling fine sand, manganese sand and plant ash materials.
6. The constructed wetland of any one of claims 1 to 5, which is characterized in that: the method also comprises a preparation method of the constructed wetland with strong self-adaptive capacity, which comprises the following specific preparation steps:
s1, investigating water source types in the field: carrying out field on-site investigation on the water area of the artificial wetland to be developed, and judging the water source quality and water quantity of the water area;
s2, rebuilding the artificial wetland:
s2.1: according to the result of the step S1, if the water source is a small water quantity water body without foul smell, a second channel (12) tunnel parallel to the water source can be opened along the water source;
s2.2: digging a foundation pit between a water source and the gallery of the second water channel (12), respectively manufacturing the water source into a first water channel (11) by using C30 concrete, manufacturing and molding the gallery of the second water channel (12), and pouring and molding the anti-seepage bottom plate (13);
s2.3: after the first water channel (11), the second water channel (12) and the anti-seepage base plate (13) are hardened and formed in the step S2.2, blocky gravels with proper sizes are selected and placed into the containing net cage (161), then an iron wire is used for sealing to manufacture a first coarse filtering layer (16), and the first coarse filtering layer are respectively placed on two sides of a cavity formed by the first water channel (11), the second water channel (12) and the anti-seepage base plate (13);
s2.4: coarse sand is filled between the two first coarse filter layers (16) and forms a water seepage layer (14) after being compacted;
s2.5: mixing fine sand, manganese sand and plant ash according to a proportion by using a stirring device, and then putting the mixture into the top of a water seepage layer (14) to form a first filter layer (15) through compaction;
s2.6: backfilling the excavated soil to the top of the first filter layer (15) and the first coarse filter layer (16), and spreading and compacting to form a first planting layer (110);
s3, planting green plants: reed, hyacinth and cattail are planted on the top of the first planting layer (110).
7. The constructed wetland and the preparation method thereof with strong self-adaptive capacity as claimed in claim 6, wherein the constructed wetland comprises: the ratio of the fine sand, the manganese sand and the plant ash in the step S2.5 is 8-9:0.3-0.5: 1-1.5.
8. The constructed wetland and the preparation method thereof with strong self-adaptive capacity as claimed in claim 6, wherein the constructed wetland comprises: the thickness of the first planting layer (110) compacted in the step S2.6 is not less than 50 cm.
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| CN114702193A (en) * | 2022-02-08 | 2022-07-05 | 浙江水利水电学院 | Novel view formula quality of water purifies facility |
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