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Method for purifying water quality by utilizing species diversity of submerged plants

A technology for submerged plants and water purification, which is applied in the field of water purification to achieve the effects of inhibiting algal blooms, restoring and protecting ecology and service functions, and improving the transparency of water bodies

Active Publication Date: 2017-06-20
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, only a few scholars at home and abroad have studied the species diversity and ecological functions of submerged plant communities.

Method used

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  • Method for purifying water quality by utilizing species diversity of submerged plants
  • Method for purifying water quality by utilizing species diversity of submerged plants
  • Method for purifying water quality by utilizing species diversity of submerged plants

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Select the submerged plant species that are common in freshwater lakes and rivers, can be symbiotic, and can reproduce asexually through stem nodes: Hydrilla Hydrillaverticillata, Ceratophyllum demersum, Myriophyllum verticillatum) and Elodea nuttalli to construct four kinds of submerged plant communities with different species diversity levels;

[0023] (2) collect each 240 of these 4 kinds of plants from the natural lake and carry out the cultivation of experimental materials, each plant length is 13cm, repair and remove all side branches, pay attention not to make the top of the plant injured, and avoid selecting flowering plants;

[0024] (3) Use the above plants to construct 4 plant communities with different levels of species diversity, including 1, 2, 3 and 4 species of plant communities. The community construction method is as follows:

[0025] Construction of 1 species community: 12 plants of each plant are planted in a flowerpot as a community, with 5 repe...

Embodiment 2

[0047] For the waters of Weishan Lake, the common and symbiotic submerged plant species in the watershed are counted, mainly including four kinds of scorpion grass, green leaf vegetable, chrysanthemum chinensis, and sarcophagus. Use 2 or 3 of them (S. chinensis + S. glabra; or S. chinensis + S. glabra + P. chinensis) to construct a plant community with a medium level of species diversity to purify water.

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Abstract

The invention provides a method for purifying water quality by utilizing the species diversity of submerged plants. The method comprises the following steps: (1) selecting the species of submerged plants which are common in fresh water lakes and rivers and can be symbiotic and can be subjected to asexual propagation through the internodes, constructing submerged plant communities comprising one, two, three and four species respectively and having different species diversity levels; (2) putting the constructed communities into sewage; (3) after 30-50 days, taking the water samples in a container to measure the water quality indexes, determining the best species diversity level for purification of the water quality and the optimal species combination under the diversity level. According to the method provided by the invention, the total nitrogen content of the water body can be effectively reduced, the water transparency of the water body can be improved, and algal bloom can be inhibited, the ecological and service functions of the wetland can be effectively restored and protected, and a scientific theoretical basis can be provided for ecological restoration of the degraded lake wetland.

Description

technical field [0001] The invention belongs to the technical field of water body purification, and in particular relates to a method for purifying water quality by using species diversity of submerged plants. Background technique [0002] Wetlands have ecological service functions such as purifying water bodies, conserving water sources, regulating climate, and maintaining biodiversity. Healthy wetland ecosystems often have well-developed submerged plant communities as their producers. In recent years, due to the massive discharge of industrial wastewater, agricultural wastewater and domestic sewage, a large amount of nutrients such as nitrogen and phosphorus have entered the water body, causing the rapid reproduction of algae and other plankton, the growth of submerged plants has been severely inhibited, and even the community has declined. , eventually leading to a sharp decline in the self-purification capacity of wetlands. Therefore, the restoration and reconstruction...

Claims

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Application Information

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IPC IPC(8): C02F3/32
CPCC02F3/322Y02W10/10
Inventor 罗芳丽刘云鹏于飞海
Owner BEIJING FORESTRY UNIVERSITY
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