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An ecological restoration method for eutrophic lakes with hard substrate

A technology of eutrophication and ecological restoration, which is applied in the field of ecological restoration of eutrophic lakes to achieve the effect of improving the transparency of water bodies, being beneficial to restoration and having good stability.

Active Publication Date: 2015-08-12
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the patent of the present invention is to solve the problem that the above-mentioned eutrophic lakes are difficult to apply ecological restoration projects. It is to provide an ecological restoration method for hard-bottomed eutrophic lakes, through the joint action of environmental protection ceramic filter balls and submerged plants Restoration of water body and sediment, the ecological restoration method is simple and easy to operate, low cost, high survival rate of submerged plants, no secondary pollution, has economic and environmental benefits, and the ecological restoration technology can be extended and applied to hard bottom eutrophication Restoration of the lake

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for ecological restoration of a hard-substrate eutrophic lake, the steps of which are:

[0024] 1) Choose bitter grass as the species of submerged plants;

[0025] 2) Lining a bamboo ring with a radius of 20cm in a degradable non-woven mesh bag with a mesh size of 1cm×1cm, the height of the mesh bag is 35cm, and the mesh bag is filled with environmentally friendly ceramic filter balls (particle size 2-5cm), and use degradable fiber tape to connect 5 mesh bags in series;

[0026] 3) The present invention was implemented in an ecological restoration demonstration area of ​​a lake with hard bottom and thin silt layer in Zhejiang Province. Transplant the 5 cm long seedlings of bitter grass into the net bag, and then evenly throw the net bag in series on the lake surface and sink to the bottom of the lake;

[0027] 4) Regularly manage and maintain bitter grass.

[0028] After 6 months of planting, the survival rate of bitter grass reached 90%, 70% of the planting...

Embodiment 2

[0032] A method for ecological restoration of a hard-substrate eutrophic lake, the steps of which are:

[0033] 1) The species of submerged plants chooses P. spicaculata;

[0034] 2) Lining a bamboo ring with a radius of 20cm in a degradable non-woven mesh bag with a mesh size of 1cm×1cm, the height of the mesh bag is 35cm, and the mesh bag is filled with environmentally friendly ceramic filter balls (particle size 2-5cm), and use degradable fiber tape to connect 5 mesh bags in series;

[0035] 3) The present invention was implemented in an ecological restoration area of ​​a hard-bottom lake in Jiangsu Province. Transplant the 5cm-long stem section of P. spicanus into a net bag, and then evenly throw the net bag in series on the lake surface and sink to the bottom of the lake;

[0036] 4) Regularly manage and maintain P. spicaculata.

[0037] Six months after planting, the survival rate of P. spicaculata reached 95%, and 70% of the planting area was covered by P. spicanus. ...

Embodiment 3

[0039] A method for ecological restoration of a hard-substrate eutrophic lake, the steps of which are:

[0040] 1) The species of submerged plants is Aphrodisiac;

[0041] 2) Lining a bamboo ring with a radius of 20cm in a degradable non-woven mesh bag with a mesh size of 1cm×1cm, the height of the mesh bag is 35cm, and the mesh bag is filled with environmentally friendly ceramic filter balls (particle size 2-5cm), and use degradable fiber tape to connect 5 mesh bags in series;

[0042] 3) The present invention was implemented in an ecological restoration demonstration area of ​​a lake with hard bottom and thin silt layer in Zhejiang Province. Transplant the 5cm long seedlings of Smilax chinensis into the net bag, and then evenly throw the net bag in series on the lake surface and sink to the bottom of the lake;

[0043] 4) Regularly manage and maintain the weeds.

[0044] After 6 months of planting, the survival rate of Smilax was up to 95%, 75% of the planting area was co...

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Abstract

The invention discloses an ecological restoration method of a hard-bottom eutrophic lake, which comprises the following steps: 1) selection of submerged plant type; 2) production of a planting carrier: lining a degradable nonwoven mesh bag with a bamboo ring, putting environment-friendly ceramic filter balls into the mesh bag, and connecting the mesh bags in series with a degradable fiber band; 3) planting method: transplanting the seedlings of the submerged plant into the mesh bags, and submerging the mesh bags in series connection to the lake bottom; 4) in the early growth stage of the submerged plant, adsorbing the bottom mud and the substances such as nitrogen and phosphorus in the water body through the environment-friendly ceramic filter balls; and after the submerged plant grows, restoring the water body and bottom mud of the eutrophic lake through the joint effect of the submerged plant and ceramic filter balls; and 5) performing scientific management and maintenance on the submerged plant. The method disclosed by the invention is applied to the ecological restoration work of the hard-bottom eutrophic lakes with relatively thin mud layer. The operation is simple and easy to implement, the cost is low, the survival rate of the submerged plant is high, secondary pollution is avoided, and the ecological restoration technology is popularized and applied to the restoration work of the hard-bottom eutrophic lakes.

Description

technical field [0001] The invention relates to an ecological restoration method of eutrophic lakes, in particular to an ecological restoration method of hard-bottom eutrophic lakes. It can be applied to ecological restoration projects of eutrophic lakes with thin hard bottom mud layer. Background technique [0002] The restoration technologies of eutrophic lakes mainly include sediment dredging and sediment covering technology, sewage interception technology, artificial aeration technology, water diversion cleaning technology and biological ecological restoration technology. Bioremediation technology is an emerging environmental biotechnology in recent years. In the mid-1980s, developed countries conducted research on bioremediation technology and applied it in actual lake restoration projects. However, there are still problems such as immature and stable technology, single technical means, and unpredictability of the effect in the application of ecological restoration tec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32
CPCY02W10/18Y02W10/10
Inventor 吴振斌张义贺锋夏世斌徐栋周巧红张垚磊
Owner INST OF AQUATIC LIFE ACAD SINICA
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