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Method for reducing water eutrophication

A water eutrophication and eutrophication technology, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., to achieve low cost, increase dissolved oxygen rate, and reduce chlorophyll content.

Inactive Publication Date: 2012-03-07
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is, in order to overcome the problems existing in the prior art, to provide a kind of aquatic plants and animals that jointly control the algae in eutrophic water and reduce the eutrophic substances Combined with the method of reducing nutrient-rich substances in water, this method is simple to operate, has a long-lasting effect, and does not have secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the eutrophic water body, we stocked Trichophylla and Trichodontida simultaneously, and the stocking density of Trichodontia was 2 juvenile mussels / m 2 , the average weight of each young clam is about 50g, and the foxtail algae is 250g / m 2 . Regularly check whether there is foxtail algae floating on the water, if it is floating, salvage it, check whether the triangle sail clam is dead, and replace it with a new clam body after death. Regularly check the number of phytoplankton in the water, and if the number increases, increase the breeding density of the triangle sail. Then check and maintain regularly. Using the untreated section of the Litang River in Lingang New City, Shanghai to carry out the experiment on Trichoceranthus and Trigonopsis, it can be seen that the total phosphorus in the water added with Trigonopsis decreased rapidly. After 7 days of the test, the total phosphorus content decreased from the original 0.6380mg / L is reduced to about 0.2mg / L, and t...

Embodiment example 2

[0022] In the eutrophic water body, the Elodea and the triangular sail mussels are stocked at the same time, and the stocking density of the triangular sail mussels is 2 juvenile mussels / m 2 , the average weight of each young clam is about 50g, and Elodea 150g / m 2 . Regularly check whether Elodea is floating on the water, and if it is floating, salvage it, check whether the triangle sail clam is dead, and replace it with a new clam body after death. Regularly check the number of phytoplankton in the water, and if the number increases, increase the breeding density of the triangle sail. Then check and maintain regularly. It can be seen that the experiment of using the untreated section of the Litang River in Lingang New City, Shanghai, to carry out experiments on foxtail algae and trigonopsis. Elodea improves dissolved oxygen in water and absorbs nitrogen and phosphorus. The dissolved oxygen in the joint action group of Elodea and Trigonopsis is about 1mg / L higher than that ...

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Abstract

The invention provides a method for reducing water eutrophication. The method is that a submerged plant and a filter freshwater bivalve mollusk are bred in eutrophic water, wherein the submerged plant comprises one or more than two selected from Myriophyllum, Elodea, Ceratophyllum, and Hydrilla varticillata, and the filter freshwater bivalve mollusk is hyriopsis cumingii. Compared with some present floating technologies, the method of the invention not only utilizes roots of the submerged plant to absorb nitrogen and phosphor, but also utilizes leaves of the submerged plant to absorb eutrophic substances in water, so the oxygen dissolving rate of water is improved; and the method of the invention has the advantages of simple operation, low cost, no secondary pollution, and generation of certain economic benefits through combining with the aquatic product culture.

Description

technical field [0001] The invention relates to the technical field of water quality purification, in particular to a technology for regulating and purifying water quality through the cooperation of aquatic animals and plants. Background technique [0002] The deterioration of the functional health of the river system is mainly manifested in the changes in the nutrients in the water, the chemical properties of the water, the hydrological characteristics and the dynamic characteristics of the river ecosystem, and the resulting huge pressure on the original aquatic ecosystem and original species. The management of rivers by humans has gone through a process from simple flood control to multi-functional development and utilization, so that rivers can perform multiple functions at the same time, so as to better meet the needs of human development. River pollution is one of the main negative consequences of human beings' improper use and control of rivers. River pollution control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
Inventor 何培民杜霞孙鹏涛饶涛霍元子
Owner SHANGHAI OCEAN UNIV
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