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Method for preventing and controlling eutrophic water bloom in drinking water source

A technology for eutrophication and drinking water, applied in the field of water treatment, can solve the problems of shading device design, high shading cost, harsh wind and wave conditions, etc., and achieve the effect of low operating and management costs and simple operation

Inactive Publication Date: 2006-11-08
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0005] It is worth noting that since light is an essential factor for the growth of algae, some scholars at home and abroad have proposed in recent years that it is possible to inhibit the growth and reproduction of algae through physical shading methods. Practical problems such as poor performance are difficult to solve, which makes the design of the corresponding water source shading device a difficult problem, making this technology still in the experimental research stage.

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  • Method for preventing and controlling eutrophic water bloom in drinking water source

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Embodiment

[0043] Embodiment The experimental site is a water surface area of ​​120000m 2 , with an average water depth of 8m and a daily water supply of 10,000m 3 In a small reservoir, due to the discharge of non-point source sewage from rural areas all the year round, severe algal blooms often occur in the reservoir in summer, and the number of algae in the water is 2.7×10 9 per L, and mainly harmful Microcystis aeruginosa, with a transparency of 0.1 meters, a turbidity of 107°, a COD of 27 mg / L, a total nitrogen of 1.3 mg / L, a total phosphorus of 0.3 mg / L, and an overall water quality of Class V. For improving water quality, adopted method of the present invention.

[0044] According to the terrain characteristics, a first-level ecological permeable dam with a height of 8.5m, a width of 3m, and a total length of 300m is built near the water intake along the coast. Among them, bamboo cages are commonly used in engineering construction, and bamboo cages are piled up to form permeable...

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Abstract

The method of preventing and controlling eutrophic water bloom in drinking water source combines the physical shading technology and ecological float island technology and includes separating the drinking water source site into several areas, initially purifying polluted water with ecological float island to eliminate large grain suspended matter, adsorb partial nitride and phosphide and reduce wind wave; leading resource water to ecological shading area with the first ecological permeating dam and eliminating partial nitride and phosphide with the hygrophyte in the dam; eliminating harmful algae in the ecological shading area and eliminating residual nitride and phosphide with the floating aquatic plant; leading the purified water with the second ecological permeating dam to the water quality stabilizing area; and conditioning and stabilizing water quality in natural water area to obtain high quality resource water.

Description

technical field [0001] The invention relates to a method for preventing and controlling eutrophic algal blooms in drinking water sources. By adopting physical shading technology and ecological floating island technology, the drinking water sources are divided into several areas for purification and inhibiting the growth of harmful algae, so as to obtain high-quality source water to ensure the safety of water supply. It belongs to the technical field of water treatment. Background technique [0002] In recent years, the problem of water eutrophication in drinking water sources in my country has become increasingly serious. In spring and summer, blue-green algae blooms that threaten water supply safety are the direct and disastrous results of eutrophication in drinking water sources. When the water bloom comes, a large number of aquatic animals and plants will die due to lack of oxygen, which will cause the water body to become black and smelly. loss of water supply. In my ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00
CPCY02W10/37
Inventor 孔海南陈雪初孙扬才
Owner SHANGHAI JIAO TONG UNIV
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