CN115385527A - Ecological restoration system of landscape water body - Google Patents
Ecological restoration system of landscape water body Download PDFInfo
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- CN115385527A CN115385527A CN202211058574.5A CN202211058574A CN115385527A CN 115385527 A CN115385527 A CN 115385527A CN 202211058574 A CN202211058574 A CN 202211058574A CN 115385527 A CN115385527 A CN 115385527A
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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
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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
- 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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- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
Abstract
The invention belongs to the technical field of ecological restoration, and provides an ecological restoration system for a landscape water body, which comprises a water quality treatment mechanism and an underwater ecological system, wherein the underwater ecological system comprises a submerged plant layer, a floating leaf plant layer and an emergent water plant layer which are sequentially arranged from bottom to top; the water quality treatment mechanism comprises a coarse grating, a coagulating sedimentation device, a super-magnetic separation device, a magnetic seed recovery device and a dosing device; the coarse grating is arranged at the front end of the coagulating sedimentation device, and the coagulating sedimentation device, the super-magnetic separation device and the underwater ecosystem are sequentially connected; the magnetic seed recovery device is respectively connected with the coagulating sedimentation device and the supermagnetic separation device, and the dosing device is connected with the coagulating sedimentation device. By the synergistic effect of the water quality treatment mechanism and the underwater ecosystem, the landscape water body is ensured to have good ecological purification and restoration effects, good landscape effect, good removal effect on nutrient substances in the water body and stable maintenance.
Description
Technical Field
The invention belongs to the technical field of ecological restoration, and particularly relates to an ecological restoration system for a landscape water body.
Background
In order to improve the quality of urban living environment, people build a large amount of water body landscapes around the living environment. Most landscape water bodies are in a semi-closed state for a long time, and have small water body mobility, slow updating and lack self-purification and self-circulation capabilities. Along with the aggravation of the influence of human activities, the water quality of the landscape water body is easy to deteriorate, such as the increase of floating objects in the water body, the increase of turbidity, the outbreak of blue algae and the like. Under the condition that the temperature is raised in summer, the water body is greenish and presents a eutrophication state; some even smelly, lose the original landscape and ecological functions of the landscape water body.
In landscape eutrophic water, the nutrient substances such as nitrogen, phosphorus and the like are extremely rich, so that algae plankton in the water is proliferated happily, and suddenly gathers under a given environment to cause the water to be colorful, and the eutrophication phenomenon appears in rivers and lakes and is called water bloom, while the eutrophication phenomenon occurs in oceans and is called red tide. If the water bloom and red tide phenomena occur, the transparency of the water body is continuously reduced, and the dissolved oxygen is also continuously reduced, so that the water quality deterioration phenomenon is aggravated. Most algae will release algae toxin when metabolism and death, the toxicological action is very strong, such as the alga of the phylum Cyanophyta, such as the adventitious coelococcus, tilletia flos-aquae, etc. completely secrete algal Qing Ruan, liver toxin, neurotoxin, etc. harmful substance; and part of algae organisms can secrete mucus and adhere to gills of organisms such as fishes and shrimps to block respiration of the organisms, so that aquatic organisms die in a large quantity, the existing population structure is threatened, the dominant population is continuously replaced, the structure and the property of an ecological system are obviously changed, and the biological diversity is greatly reduced. In addition, many toxic and harmful gases such as hydrogen sulfide, methane, ammonia and the like can be generated automatically when the eutrophic water body is in an anoxic state. Once the landscape water body is subjected to ecological eutrophication, the COD value is obviously increased due to the higher contents of nitrogen, phosphorus and the like in the water body and the algal toxins secreted by algae are attached, so that water resources cannot be directly used by people and livestock, and the water treatment pressure is obviously increased. In addition, algae and algal toxins secreted by the algae can directly interfere with the coagulation process, so that the sedimentation difficulty of the algae is increased; the algae can block the filter material to cause mud spheroidization, increase the loss of a filter head, shorten the period and reduce the water yield; the small-size algae can permeate the filter tank and enter the clean water tank and the pipe network, so that the content of organic matters in the water body is increased, the bacteria breeding and the water quality deterioration of the pipe network are caused, and the corrosion is accelerated. The eutrophic landscape water body contains a plurality of nutrient substances, promotes the algae and aquatic organisms to breed fourteen, not only accelerates the process of swampiness and land formation of the water body, but also directly destroys the ecological balance of the landscape water body.
Therefore, restoring the function of landscape water becomes one of the outstanding problems that need to be solved urgently at present.
Disclosure of Invention
In view of this, the invention provides an ecological restoration system for landscape water.
The technical scheme of the invention is as follows:
an ecological restoration system of a landscape water body is characterized by comprising a water quality treatment mechanism and an underwater ecosystem, wherein the underwater ecosystem comprises a submerged plant layer, a floating leaf plant layer and an emergent plant layer which are sequentially arranged from bottom to top;
the water quality treatment mechanism comprises a coarse grating, a coagulating sedimentation device, a super-magnetic separation device, a magnetic seed recovery device and a dosing device; the coarse grating is arranged at the front end of the coagulating sedimentation device, and the coagulating sedimentation device, the super-magnetic separation device and the underwater ecosystem are sequentially connected; the magnetic seed recovery device is respectively connected with the coagulating sedimentation device and the supermagnetic separation device, and the dosing device is connected with the coagulating sedimentation device.
Further, the submerged plant layer comprises a combination of at least two of the following plants: herba Swertiae Dilutae, foliumet spicatum, stonewort, hydrilla verticillata, ardisia crenata, herba Equiseti Arvinsis, and herba Eupatorii.
In the invention, the submerged plant is the key, and the higher the submerged plant coverage rate is, the more a clear water type ecosystem with stronger purification capacity can be formed. The large-scale aquatic plants can effectively promote the energy flow and the material circulation of the lake ecosystem, and particularly, an important interface covered by submerged plants is a key area combining two large nutrient reservoirs, including a water body and sediment.
The submerged plant is the key to change the lake from a mixed water state with phytoplankton as the dominance to a clear water state with macrophyte as the dominance. Submerged plants are the only producers in water competing with algae, and play very important roles in increasing the concentration of dissolved oxygen in water, inhibiting the growth of algae, purifying water quality and the like.
Further, the floating-leaf plant layer comprises at least one of the following plants: flos Nelumbinis, and flos Nymphaeae.
In the invention, the roots and stems of the floating-leaf plants grow in muddy water and are distributed in a dotted manner, so that the overall landscape effect is improved.
Further, the water elevator plant layer comprises a combination of at least two plants as follows: bamboo leaf, reed, cattail, flower of Thymus, arrowhead, iris citrifolia and drocalamus.
In the invention, the emergent aquatic plants have extremely strong landscaping capability, and the emergent aquatic plants can intercept the scouring of rainstorm and control exogenous pollution in the coastal zone. Meanwhile, the landscape effect with layering and rich colors is formed.
Furthermore, the planting density of 150-200 plants/m is designed within 0-55m of the water outlet of the super-magnetic separation device 2 (ii) a The planting density of the plant in the downstream of 55-160m of the water outlet of the super-magnetic separation device is 110-130 plants/m 2 (ii) a The planting density of 50-90 plants/m is designed within 160-250m of the downstream of the water outlet of the super-magnetic separation device 2 。
In the invention, in consideration of water depth, survival rate, construction cost and the like, the method of combining the cuttage method and the throw-planting method is adopted for planting the aquatic weeds, and the shallow water area of the river has more stones, so that the throw-planting method is adopted for the part which cannot be subjected to cuttage. The design is based on gradient planting, the planting density near the super magnetic water outlet is large, and the planting density gradually downstream is small.
Furthermore, a flocculating agent and a treating agent are arranged in the coagulating sedimentation device.
Further, the flocculating agent comprises at least one of polyaluminium chloride and polyacrylamide; the treating agent comprises at least one of magnetic powder and modified nano zero-valent iron.
Further, the treating agent comprises magnetic powder and modified nano zero-valent iron powder, and the mass ratio of the magnetic powder to the modified nano zero-valent iron powder is 10-30.
In the invention, the adopted flocculant, namely polyaluminium chloride, can be used as a treatment flocculant and a coagulant, and has good treatment effect and simple operation; polyacrylamide is a linear high molecular inorganic flocculant; all have good flocculation effect. The magnetic flocculation technology combines the advantages of the traditional flocculation technology and the magnetic separation technology, and the magnetic particles are added in the traditional flocculation technology, so that pollutants can be quickly separated from water, and the treatment time is shortened; the particle size of the nanometer zero-valent iron is generally less than 100nm, the average particle size is 60nm, and the characteristics of high reducibility, large surface area, small particle size and the like can generate different chemical reactions with pollutants, so that the purpose of eliminating the pollutants is achieved through the processes of adsorption, oxidation and the like.
The operation process of the invention is as follows: polluted landscape water is pretreated by a 1-2mm thick grid, then enters a fast mixer added with a proper amount of food-grade efficient composite coagulant and magnetic seeds for fast mixing reaction, the hydraulic retention time is about 1-2min, then enters a two-stage slow mixer, the retention time is about 2-4min, and then enters a super-magnetic separation device for magnetic floc separation, so that higher transparency is provided for the growth of subsequent submerged plants; the water treated by the super-magnetic separation device automatically flows into an underwater ecosystem, the process mainly has the effects of adsorbing and degrading soluble pollutants in water by using submerged plants, and the effluent water is used as supplementary landscape water; the underwater ecosystem is close to the ultra-magnetic separation water outlet and is provided with the simple drop overflow device, and the simple drop overflow device is mainly used for releasing micro bubbles dissolved in water in a pipeline, preventing the micro bubbles from entering a river channel to generate air flotation scum, slowing down the flow rate of landscape water after treatment flowing into the river channel, and preventing the landscape water from impacting a river bed to cause resuspension of bottom mud and cause secondary pollution. The magnetic flocs after the super-magnetic separation enter a magnetic seed recovery system, the magnetic flocs are firstly smashed and dispersed by a high-speed dispersion machine, then the magnetic seeds and the flocs are separated by a magnetic separation rotary drum, the separated magnetic seeds are stirred by a magnetic seed stirrer to prepare turbid liquid, then the turbid liquid is lifted by a magnetic seed circulating pump and returns to a magnetic flocculation rapid mixer again, and the separated flocs are transported outside after being dehydrated.
By the synergistic effect of the water quality treatment mechanism and the underwater ecosystem, the landscape water body is ensured to have good ecological purification and restoration effects, good landscape effects, good removal effects on nutrient substances in the water body and stability.
Drawings
FIG. 1 is a schematic view of the present invention.
Detailed Description
The following will clearly and completely describe the technical solutions of 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 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.
Example 1
An ecological restoration system of a landscape water body is characterized by comprising a water quality treatment mechanism 10 and an underwater ecosystem 20, wherein the underwater ecosystem comprises a submerged plant layer, a floating leaf plant layer and an emergent water plant layer which are sequentially arranged from bottom to top;
the water quality treatment mechanism comprises a coarse grating 1, a coagulating sedimentation device 2, a super-magnetic separation device 3, a magnetic seed recovery device 4 and a dosing device 5; the coarse grating is arranged at the front end of the coagulating sedimentation device, and the coagulating sedimentation device, the super-magnetic separation device and the underwater ecosystem are sequentially connected; the magnetic seed recovery device is respectively connected with the coagulating sedimentation device and the supermagnetic separation device, and the dosing device is connected with the coagulating sedimentation device.
Further, the submerged plant layer comprises a combination of the following plants: herba Swertiae Dilutae, stonecrop, and hydrilla verticillata.
Further, in the floating-leaf plant layer, lotus is planted.
Further, the water elevator plant layer comprises the following plants in combination: cattail, relili flower, and Hemerocallis citrina.
Furthermore, the planting density of 180 plants/m is designed within 0-55m of a water outlet of the super-magnetic separation device 2 (ii) a The planting density of 120 plants/m is designed within 55-160m of the downstream of the water outlet of the super-magnetic separation device 2 (ii) a The planting density of 70 plants/m is designed within 160-250m of the downstream of the water outlet of the super-magnetic separation device 2 。
Furthermore, a flocculating agent and a treating agent are arranged in the coagulating sedimentation device.
Further, the flocculating agent comprises polyaluminium chloride and polyacrylamide.
Further, the treating agent comprises magnetic powder and modified nano zero-valent iron powder, and the mass ratio of the magnetic powder to the modified nano zero-valent iron powder is 17.
Example 2
An ecological restoration system of a landscape water body is characterized by comprising a water quality treatment mechanism 10 and an underwater ecosystem 20, wherein the underwater ecosystem comprises a submerged plant layer, a floating leaf plant layer and an emergent water plant layer which are sequentially arranged from bottom to top;
the water quality treatment mechanism comprises a coarse grating 1, a coagulating sedimentation device 2, a super-magnetic separation device 3, a magnetic seed recovery device 4 and a dosing device 5; the coarse grating is arranged at the front end of the coagulating sedimentation device, and the coagulating sedimentation device, the super-magnetic separation device and the underwater ecosystem are sequentially connected; the magnetic seed recovery device is respectively connected with the coagulating sedimentation device and the supermagnetic separation device, and the dosing device is connected with the coagulating sedimentation device.
Further, the submerged plant layer comprises a combination of the following plants: herba Swertiae Dilutae, foliumet spicatum, and Ardisia crenata.
Furthermore, the floating-leaf plant layer comprises water lily.
Further, the water elevator plant layer comprises the following plants in combination: arrowhead, yellow iris and drogue.
Furthermore, the planting density of 150 plants/m is designed within 0-55m of a water outlet of the super-magnetic separation device 2 (ii) a Outlet of supermagnetic separation deviceThe planting density is designed to be 110 plants/m within 55-160m of the downstream of the water gap 2 (ii) a The planting density of 55 plants/m is designed within 160-250m of the downstream of the water outlet of the super-magnetic separation device 2 。
Furthermore, a flocculating agent and a treating agent are arranged in the coagulating sedimentation device.
Further, the flocculant comprises polyaluminum chloride.
Further, the treating agent comprises magnetic powder and modified nano zero-valent iron powder, and the mass ratio of the magnetic powder to the modified nano zero-valent iron powder is 13.
Example 3
An ecological restoration system of a landscape water body is characterized by comprising a water quality treatment mechanism 10 and an underwater ecosystem 20, wherein the underwater ecosystem comprises a submerged plant layer, a floating leaf plant layer and an emergent water plant layer which are sequentially arranged from bottom to top;
the water quality treatment mechanism comprises a coarse grating 1, a coagulating sedimentation device 2, a super-magnetic separation device 3, a magnetic seed recovery device 4 and a dosing device 5; the coarse grating is arranged at the front end of the coagulating sedimentation device, and the coagulating sedimentation device, the super-magnetic separation device and the underwater ecosystem are sequentially connected; the magnetic seed recovery device is respectively connected with the coagulating sedimentation device and the supermagnetic separation device, and the dosing device is connected with the coagulating sedimentation device.
Further, the submerged plant layer comprises a combination of the following plants: herba Sonchi Oleracei, herba Eupatorii Lindleyani, and herba Eupatorii Lindleyani.
Furthermore, the floating-leaf plant layer comprises lotus and water lily.
Further, the water elevator plant layer comprises the following plants in combination: cattail, zalila, droughty mushroom.
Furthermore, the planting density of 200 plants/m is designed within 0-55m of a water outlet of the super-magnetic separation device 2 (ii) a The planting density of 130 plants/m is designed within 55-160m of the downstream of the water outlet of the super-magnetic separation device 2 (ii) a The planting density of 80 plants/m is designed within 160-250m of the downstream of the water outlet of the super-magnetic separation device 2 。
Furthermore, a flocculating agent and a treating agent are arranged in the coagulating sedimentation device.
Further, the flocculating agent comprises polyaluminium chloride and polyacrylamide.
Further, the treating agent comprises magnetic powder and modified nano zero-valent iron powder, and the mass ratio of the magnetic powder to the modified nano zero-valent iron powder is 26.
Test of Experimental Effect
By adopting the method of the invention, the two places of a certain landscape water area are respectively repaired by adopting the methods of the embodiment 1-the embodiment 3, the test and detection items comprise transparency, ammonia nitrogen, COD and total phosphorus, and the detection method comprises the following steps: transparency: the Seebeck method; COD: determination of chemical oxygen demand potassium dichromate method (GB 11914-89); ammonia nitrogen: a spectrophotometric method for measuring ammonia nitrogen in water quality by using a Nessler reagent (HJ 539-2009); total phosphorus: the determination of total phosphorus in water by ammonium molybdate spectrophotometry (GB/T11893-1989) shows the results in the following table.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art. It should be noted that the technical features not described in detail in the present invention can be implemented by any prior art.
Claims (8)
1. An ecological restoration system of a landscape water body is characterized by comprising a water quality treatment mechanism and an underwater ecosystem, wherein the underwater ecosystem comprises a submerged plant layer, a floating leaf plant layer and an emergent water plant layer which are sequentially arranged from bottom to top;
the water quality treatment mechanism comprises a coarse grating, a coagulating sedimentation device, a super-magnetic separation device, a magnetic seed recovery device and a dosing device; the coarse grating is arranged at the front end of the coagulating sedimentation device, and the coagulating sedimentation device, the super-magnetic separation device and the underwater ecosystem are sequentially connected; the magnetic seed recovery device is respectively connected with the coagulating sedimentation device and the supermagnetic separation device, and the dosing device is connected with the coagulating sedimentation device.
2. The ecological restoration system for landscape water body according to claim 1, wherein the submerged plant layer comprises a combination of at least two plants: herba Swertiae Dilutae, foliumet spicatum, stonewort, hydrilla verticillata, ardisia crenata, herba Equiseti Arvinsis, and herba Eupatorii.
3. The ecological restoration system for landscape water body according to claim 2, wherein the floating-leaf plant layer comprises at least one of the following plants: lotus and water lily.
4. The ecological restoration system for landscape water body according to claim 3, wherein the water lifting plant layer comprises a combination of at least two plants: bamboo leaf, reed, cattail, flower of Thymus, arrowhead, iris citrifolia and drocalamus.
5. The ecological restoration system for landscape water body according to claim 1, wherein the planting density of the ultra-magnetic separation device is designed to be 150-200 plants/m within 0-55m of the water outlet 2 (ii) a The planting density of the plant in the downstream of 55-160m of the water outlet of the super-magnetic separation device is 110-130 plants/m 2 (ii) a Ultra magnetic separationThe downstream of the water outlet of the device is 160-250m, and the planting density is designed to be 50-90 plants/m 2 。
6. The ecological restoration system for landscape water bodies according to claim 2, wherein a flocculating agent and a treating agent are arranged in the coagulating sedimentation device.
7. The ecological restoration system for landscape water body according to claim 6, wherein the flocculant comprises at least one of polyaluminium chloride and polyacrylamide; the treating agent comprises at least one of magnetic powder and modified nano zero-valent iron.
8. The ecological restoration system for landscape water bodies according to claim 7, wherein the treatment agent comprises magnetic powder and modified nano zero-valent iron powder, and the mass ratio of the magnetic powder to the modified nano zero-valent iron powder is 10-30.
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| CN214400152U (en) * | 2020-10-27 | 2021-10-15 | 中建环能科技股份有限公司 | Landscape water treatment system |
| CN114671527A (en) * | 2021-11-25 | 2022-06-28 | 苏州基业生态园林股份有限公司 | Intelligent ecological water purification system and method for landscape lake pond |
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2022
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| CN104512986A (en) * | 2014-12-16 | 2015-04-15 | 宇星科技发展(深圳)有限公司 | Combined restoring method for eutrophic lake |
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