CN115466007A - Wetland park formula ecological clean system - Google Patents
Wetland park formula ecological clean system Download PDFInfo
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- CN115466007A CN115466007A CN202211035557.XA CN202211035557A CN115466007A CN 115466007 A CN115466007 A CN 115466007A CN 202211035557 A CN202211035557 A CN 202211035557A CN 115466007 A CN115466007 A CN 115466007A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 109
- 238000000746 purification Methods 0.000 claims abstract description 36
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 13
- 231100000719 pollutant Toxicity 0.000 claims abstract description 13
- 238000001556 precipitation Methods 0.000 claims abstract description 9
- 238000007667 floating Methods 0.000 claims abstract description 8
- 239000010802 sludge Substances 0.000 claims abstract description 8
- 238000013461 design Methods 0.000 claims description 15
- 230000014759 maintenance of location Effects 0.000 claims description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 229910052698 phosphorus Inorganic materials 0.000 claims description 9
- 239000011574 phosphorus Substances 0.000 claims description 9
- 239000002689 soil Substances 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 7
- 238000004062 sedimentation Methods 0.000 claims description 7
- 241000251468 Actinopterygii Species 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 241000195493 Cryptophyta Species 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 244000005700 microbiome Species 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- -1 organic matters Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 241000196324 Embryophyta Species 0.000 description 48
- 239000000463 material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 241000252229 Carassius auratus Species 0.000 description 1
- 241000735527 Eupatorium Species 0.000 description 1
- 241000827798 Hemerocallis citrina Species 0.000 description 1
- 241001517066 Iris sibirica Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241001092500 Photinia x fraseri Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 244000111146 Sonchus arvensis Species 0.000 description 1
- 235000008132 Sonchus arvensis ssp. uliginosus Nutrition 0.000 description 1
- 235000004224 Typha angustifolia Nutrition 0.000 description 1
- 240000001398 Typha domingensis Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
- 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
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
- E02B3/023—Removing sediments
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/10—Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/14—Preformed blocks or slabs for forming essentially continuous surfaces; Arrangements thereof
-
- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
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- Water Supply & Treatment (AREA)
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- Biotechnology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to the technical field of wetland park maintenance, in particular to a wetland park type ecological purification system, which comprises a precipitation pretreatment subsystem, an artificial medium water quality purification subsystem, a shallow water type plant wetland subsystem, a porous medium ecological filter bed, a deep water type plant wetland subsystem and a sludge discharge auxiliary configuration. The wetland species diversity habitat system construction method of the wetland park adopts various submerged plants, floating plants, emergent plants, hygrophytes and terrestrial plants to construct wetland park plant communities in a mixed manner, and meanwhile, habitat island construction and bird attracting measures are assisted, so that the plant diversity of the wetland park is effectively improved, the wetland landscape types in the wetland park are greatly enriched, the pollutant purification capacity of the wetland is improved, diversified habitat spaces are provided for various wetland organisms, and the ecological bearing capacity and comprehensive ecological benefits of the wetland park are remarkably improved.
Description
Technical Field
The invention relates to the technical field of wetland park maintenance, in particular to a wetland park type ecological purification system.
Background
With the development of human socioeconomic technology and the change of global climate, wetlands around the world are in early luck which is degraded or will be degraded, and the severity degree is increased day by day; under the condition that the natural wetland is greatly lost, the repair and reconstruction of the degraded wetland become a focus of attention; the wetland park is a reasonable mode for protecting, developing and utilizing the wetland, and is characterized in that a natural wetland or a site with typical characteristics is utilized, the structure, characteristics and ecological process of a natural wetland ecosystem are simulated to plan and design by taking the restoration of an ecological environment and the construction of a regionalized wetland landscape as targets, and a wetland landscape subsystem domain with the functions of species habitat protection, ecological tourism, science popularization education and the like is formed; the wetland park plant community meets the basic landscape function, and simultaneously, the wetland park plant community is ecological, the created aesthetic feeling can make the wetland environment more beautiful, people can obtain the understanding of the artificial wetland ecosystem once in the travel entertainment process, the education culture of the wetland can be transferred, the urban wetland pattern is changed in the urbanization development process, the quantity of the Chinese urban wetland is sharply reduced in recent years, the ecological function is deteriorated, the area and the quantity of the wetland are greatly reduced, and therefore, the establishment of the urban wetland park is an important means for maintaining the sustainable development of the urban wetland.
The wetland refers to a natural or artificial marshland and other laminar shallow water subsystems with static or flowing water bodies, and also comprises a water area with the water depth not more than 6 meters in low tide, and the wetland generally comprises a water flow layer, a sludge layer, a gravel layer and a clay layer from top to bottom. The wetland, the forest and the ocean are called three global ecological systems and are widely distributed all over the world. A large number of animals and plants live in the wetland ecosystem, and a large number of wetlands are listed as natural protection subsystems. The wetland is an ecological resource and is more and more emphasized by various countries, and a plurality of wetlands are developed to form wetland parks as landscapes for people to visit and appreciate. The wetland park is provided with natural wetlands and artificial wetlands, the wetlands are greatly influenced by the environment, if the wetland park does not rain for a long time, the moisture in the wetland is seriously evaporated, the moisture around the wetland is diffused and lost to the periphery, or the water source of the wetland is exhausted and reduced to influence the wetland, at present, the wetland park is generally moisturized by directly irrigating water into the wetland park, however, for a wetland group consisting of a plurality of small wetlands, each piece of wetland needs to be independently irrigated and moisturized, and the workload is huge; the soil quality around the wetland is soft usually, moisture is sufficient, and in the time of rainy, a large amount of silt all can be washed into the wetland, leads to the thickness increase of wetland soil horizon, and the water in the wetland is very muddy, and when rivers were great around the wetland, soil around can collapse even and fall into the wetland in, and long this has been in the past, the area of wetland can progressively reduce.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a wetland park type ecological purification system.
In order to realize the purpose, the invention provides the following technical scheme:
the invention provides a wetland park type ecological purification system which comprises a precipitation pretreatment subsystem, an artificial medium water quality purification subsystem, a shallow water type plant wetland system, a porous medium ecological filter bed and a deep water type plant wetland subsystem, wherein the precipitation pretreatment subsystem is connected with the artificial medium water quality purification subsystem;
the sedimentation pretreatment subsystem reduces the flow velocity of water flow and weakens the sand-carrying capacity of the water flow by increasing the water passing section, thereby playing the roles of sand sedimentation and buffering, reducing the content of settleable substances in river water and preventing garbage and floating objects from entering a wetland system;
the artificial medium water quality purification subsystem adopts artificial media and an ecological floating island to intensively purify pollutants in water, the root system of a plant forms a felt-pad-shaped structure by reasonably arranging the space of a root subsystem so as to improve the absorption function of the plant and the capability of intercepting granular pollutants and algae, and an elastic filler is hung on the lower layer to be used as a medium filler so as to enrich microorganisms and form a high-efficiency contact oxidation water quality purification subsystem;
the shallow water type plant wetland subsystem utilizes the modes of dense growth of aquatic plants, root absorption, matrix filtration and the like to adsorb, intercept and biochemically degrade pollutants such as organic matters, nitrogen, phosphorus and the like in river water, has a certain landscape function, and is mutually coupled with wetland, water surface and greenbelt.
Furthermore, the design flow of the precipitation pretreatment subsystem and the artificial medium water quality purification subsystem is Qmax =1.5 ten thousand meters 3 D, the effective retention time is 6 hours, the effective water depth is 2.5m, and the designed water surface area is 2240m 2 The effective retention time is 4h, the soil is absorbed once in 90-120 days, the side slope design is 1.
Furthermore, the effective area of the shallow water type plant wetland subsystem is 5743m 2 The wetland operation water level is 0.6m, and hydraulic retention time is 4.4h, sets up 3 thick liquid rubble overflow weirs and plays the water distribution rectification and form and push away the flow field, and shallow water type plant wetland subsystem is inside to set up the ecological island, plays the optimization in flow field, and ecological island side slope is 1:3, gentle slope.
Furthermore, the porous medium ecological filter bed adopts aerated light concrete which has the function of adsorbing phosphorus, the ecological filter dam formed by the porous concrete and the aerated light concrete further reduces the phosphorus content in water and can intercept solid particles in water, and a certain fish filtering channel is reserved in the ecological filter dam.
Furthermore, the design area of the porous medium ecological filter bed is 1800m 2 The contact time is about 0.5h, the system is divided into two units which are positioned at the inlet and the outlet of a shallow water type plant wetland subsystem and are composed of a porous concrete permeable filtering dam and a light aerated concrete filling frame.
Furthermore, the deep-water plant wetland subsystem is a large-area water body, an ecological reef is reserved, submerged aquatic plants and a proper amount of fishes are configured, and the quality of effluent water is guaranteed.
Further, the design water surface area of the deep water type plant wetland subsystem is 10294m 2 The maximum design water depth is 3.0-4.0 m, the average water depth is 3.5m, two ecological reefs are reserved in the pool, the side slope of the reefs is a gentle slope not less than 1.
Furthermore, the ecological purification system also comprises a sludge discharge auxiliary configuration, and the sludge discharge auxiliary configuration is a suction dredger.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
the wetland park type ecological purification system provided by the invention is characterized in that a wetland species diversity habitat system construction method of the wetland park adopts various submerged plants, floating plants, emergent aquatic plants, hygrophytes and terrestrial plants to construct a wetland park plant community, meanwhile, habitat island construction and bird attracting measures are assisted, so that the plant diversity of the wetland park is effectively improved, the wetland landscape types in the wetland park are greatly enriched, the pollutant purification capacity of the wetland is improved, diversified inhabitation spaces are provided for various wetland organisms, and the ecological bearing capacity and comprehensive ecological benefits of the wetland park are remarkably improved.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention. In addition, the technical solutions in the embodiments may be combined with each other, but must be based on the realization of the technical solutions by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the technical solutions should be considered that the combination does not exist, and the technical solutions are not within the protection scope of the present invention.
The purpose of the invention is realized by the following technical scheme:
the invention provides a wetland park type ecological purification system which is characterized by comprising a precipitation pretreatment subsystem, an artificial medium water quality purification subsystem, a shallow water type plant wetland subsystem, a porous medium ecological filter bed, a deep water type plant wetland subsystem and a sludge discharge auxiliary configuration, wherein the sludge discharge auxiliary configuration is 1 suction dredger.
The sedimentation pretreatment subsystem reduces the flow velocity of water flow and weakens the sand-carrying capacity of the water flow by increasing the water passing section, thereby playing the roles of sand sedimentation and buffering, reducing the content of settleable substances in river water and preventing garbage and floating objects from entering the wetland system.
The artificial medium water quality purification subsystem adopts artificial media and an ecological floating island to strengthen and purify pollutants in water, and the root system of a plant forms a felt-mat-shaped structure by reasonably arranging the space of the root subsystem so as to improve the absorption function of the plant and the capability of intercepting granular pollutants and algae, and the elastic filler is hung on the lower layer to be used as a medium filler so as to enrich microorganisms and form a high-efficiency contact oxidation water quality purification subsystem.
The design flow of the precipitation pretreatment subsystem and the artificial medium water quality purification subsystem is Qmax =1.5 ten thousand m3/d, the effective retention time is 6h, the effective water depth is 2.5m, the design water surface area is 2240m2, the effective retention time is 4h, the soil is absorbed once in 90-120 days, the side slope is designed into a plant gentle slope of 1, the filling rate of the artificial medium is 23%, and the gabion foot protection and porous coagulation building block slope protection are adopted. The side slopes of the water inlet side and the water outlet side are hardened by mortar rubble, and the side slopes on the left side and the right side of the water flow direction are ecological slope protection of plants. Plant mass of precipitation subsystem-artificial media subsystem is shown in table 1:
TABLE 1 plant population for precipitation subsystem-artificial media subsystem
| Serial number | Name of plant | Planting Density/seedling requirement |
| 1 | All-grass of Hemerocallis citrina | 16 strains/m 2 The height of the seedling is 35-50 cm |
| 2 | Religious flower | 9 strains/m 2 The height of the seedling is 50-60 cm |
| 3 | Reed | 9 strains/m 2 The height of the seedling is 50-60 cm |
| 4 | All-grass of Foliu | 25 clusters/m 2 The height of the seedling is 35-50 cm |
| 5 | Herba Lysimachiae Christinae | 16 strains/m 2 The height of the seedling is 35-50 cm |
| 6 | Photinia fraseri | The height is 350mm; the diameter of the main rod is 25mm |
The shallow water type plant wetland subsystem utilizes the modes of dense growth of aquatic plants, root absorption, matrix filtration and the like to adsorb, intercept and biochemically degrade pollutants such as organic matters, nitrogen, phosphorus and the like in river water, has a certain landscape function, and is mutually coupled with the wetland, the water surface and the greenbelt. The effective area of the shallow plant wetland subsystem is 5743m 2 The wetland operation water level is 0.6m, and hydraulic retention time is 4.4h, sets up 3 thick liquid rubble overflow weirs and plays the water distribution rectification and form and push away the flow field, and shallow water type plant wetland subsystem is inside to set up the ecological island, plays the optimization in flow field, and ecological island side slope is 1:3 gentle slope. The porous medium ecological filter bed adopts aerated light concrete, the aerated light concrete has the function of adsorbing phosphorus, the ecological filter dam formed by the porous concrete and the aerated light concrete further reduces the phosphorus content in water, and can intercept solid particles in water, and a certain fish filtering channel is reserved in the ecological filter dam. The design area of the porous medium ecological filter bed is 1800m 2 The contact time is about 0.5h, the system is divided into two units which are positioned at the inlet and the outlet of the shallow water type plant wetland subsystem and are composed of a porous concrete permeable filter dam and a light aerated concrete filler frame. The equipment and materials of the shallow water plant wetland subsystem are shown in table 2:
TABLE 2 Equipment and materials for shallow plant wetland subsystem
The deep-water plant wetland subsystem is a large-area water body, an ecological island is reserved, submerged aquatic plants and a proper amount of fishes are configured, and the quality of effluent water is guaranteed. The design water surface area of the deep water type plant wetland subsystem is 10294m 2 Maximum design water depth of 3.0-40m, the average water depth is 3.5m, two ecological reefs are reserved in the pond, the side slope of the reefs is a gentle slope not less than 1, the hydraulic retention time is about 49.0h, submerged plants are arranged at the bottom, emergent aquatic plant belts are arranged on the side slope, and the purification effect of pollutants mainly depends on the self-purification capacity of a water body. The equipment and materials of the deepwater plant wetland subsystem are shown in table 3:
TABLE 3 Equipment and materials for deepwater plant wetland subsystem
| Serial number | Name of plant | Planting Density/seedling requirement |
| 1 | Backfilling of planting soil | Backfill thickness 300mm |
| 2 | All-grass of Foliu | Seedlings of 25 square meters/square meter and 300-500 mm |
| 3 | Root of Longxu Eupatorium | Seedlings of 25 square meters/square meter and 300-500 mm |
| 4 | Goldfish algae | Seedlings of 25 square meters/square meter and 300-500 mm |
| 5 | Herba Lophatheri and herba Equiseti Arvinsis | Seedlings of 25 square meters/square meter and 300-500 mm |
| 6 | All-grass of thorny sowthistle | 25/square meter, 300mm seedling |
| 7 | Religious flower | Seedling of 12 per square meter and 300-500 mm |
| 8 | Herb of Laodera | Seedling of 12 per square meter and 300-500 mm |
| 9 | Typha angustifolia | Seedling of 16 per square meter and 300-500 mm |
| 10 | Siberian iris | 300-500 mm seedling of 16 plants per square meter |
| 11 | Porous concrete brick | 550×330×200mm |
The wetland side slopes of the shallow-water plant wetland subsystem and the deep-water plant wetland subsystem are all made from 1. 300mm planting soil layers, 500mm clay impermeable layers and undisturbed soil tamps more than 90 percent are sequentially arranged on the wetland side slope and the wetland riverbed from top to bottom, no lumps such as bulges or gravels with the diameter of more than 50mm are arranged on the surface, and the construction range is 0.5m to the periphery of the bank slope top. The outline dimension of the porous concrete building block is 550 multiplied by 330 multiplied by 200mm, and the porous concrete is orderly arranged and directly piled up on the foundation and 3 layers are piled up to form a filtering dam with the height of 600 mm.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A wetland park type ecological purification system is characterized by comprising a precipitation pretreatment subsystem, an artificial medium water quality purification subsystem, a shallow water type plant wetland system, a porous medium ecological filter bed and a deep water type plant wetland subsystem;
the sedimentation pretreatment subsystem reduces the flow velocity of water flow and weakens the sand-carrying capacity of the water flow by increasing the water passing section, thereby playing the roles of sand sedimentation and buffering, reducing the content of settleable substances in river water and preventing garbage and floating objects from entering a wetland system;
the artificial medium water quality purification subsystem adopts artificial media and an ecological floating island to intensively purify pollutants in water, the root system of a plant forms a felt-pad-shaped structure by reasonably arranging the space of a root subsystem so as to improve the absorption function of the plant and the capability of intercepting granular pollutants and algae, and an elastic filler is hung on the lower layer to be used as a medium filler so as to enrich microorganisms and form a high-efficiency contact oxidation water quality purification subsystem;
the shallow water type plant wetland subsystem utilizes the modes of dense growth of aquatic plants, root absorption, matrix filtration and the like to adsorb, intercept and biochemically degrade pollutants such as organic matters, nitrogen, phosphorus and the like in river water, has a certain landscape function, and is mutually coupled with wetland, water surface and greenbelt.
2. The wetland park-type ecological purification system of claim 1, which is characterized in that: the design flow rates of the sedimentation pretreatment subsystem and the artificial medium water quality purification subsystem are Qmax =1.5 km 3 D, the effective retention time is 6 hours, the effective water depth is 2.5m, and the designed water surface area is 2240m 2 The effective retention time is 4h, the soil is absorbed once in 90-120 days, the side slope is designed to be a plant gentle slope of 1.
3. The wetland park-type ecological purification system of claim 1, which is characterized in that: the effective area of the shallow water type plant wetland subsystem is 5743m 2 The wetland operation water level is 0.6m, the hydraulic retention time is 4.4h, set up 3 thick liquid rubble overflow weirs and play the water distribution rectification and form the plug flow field, the inside ecological island that sets up of shallow water type plant wetland subsystem plays the optimizing action in flow field, ecological island side slope is 1:3 gentle slope.
4. The wetland park-type ecological purification system of claim 1, which is characterized in that: the porous medium ecological filter bed adopts aerated light concrete, the aerated light concrete has the function of adsorbing phosphorus, the ecological filter dam formed by the porous concrete and the aerated light concrete further reduces the phosphorus content in water, and can intercept solid particles in water, and a certain fish filtering channel is reserved in the ecological filter dam.
5. The wetland park-type ecological purification system of claim 4, characterized in that: the design area of the porous medium ecological filter bed is 1800m 2 The contact time is about 0.5h, and the catalyst is divided into two unitsThe inlet and the outlet of the shallow water type plant wetland subsystem are composed of a porous concrete permeable filtering dam and a light aerated concrete filling frame.
6. The wetland park-type ecological purification system of claim 1, characterized in that: the deep-water type plant wetland subsystem is a large-area water body, an ecological island is reserved, submerged aquatic plants and a proper amount of fishes are configured, and the quality of effluent water is guaranteed.
7. The wetland park-type ecological purification system of claim 6, which is characterized in that: the design water surface area of the deep water type plant wetland subsystem is 10294m 2 The maximum design water depth is 3.0-4.0 m, the average water depth is 3.5m, two ecological reefs are reserved in the pond, the side slope of the reefs is a gentle slope not less than 1, the hydraulic retention time is about 49.0h, submerged plants are arranged at the bottom, emergent aquatic plant zones are arranged at the side slope, and the purification effect of pollutants mainly depends on the self-purification capacity of a water body.
8. The wetland park-type ecological purification system of claim 1, which is characterized in that: the ecological purification system also comprises a sludge discharge auxiliary configuration, and the sludge discharge auxiliary configuration is a suction dredger.
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