Chemical algae removing method

Abstract

The invention relates to a chemical algae-removing method belonging to the field of environmental protection, in particular to a chemical method for removing algae in the water of lakes and reservoirs with algae outbreak, particularly blue-green algae outbreak caused by water eutrophication. The method comprises the following steps that: composite algaecide consisting of a reagent A and a reagent B is prepared; potassium permanganate is ground and prepared to be an aqueous solution, namely the reagent A; acid-soluble cuprous chloride is prepared from cuprous chloride, concentrated hydrochloric acid with the mass percentage of 37 percent and water according to the proportion of 0.03g:0.5mL:100mL; aluminum chloride and sodium chloride are made into aqueous solutions respectively; the reagent B is prepared from the acid-soluble cuprous chloride, an aqueous solution of aluminum chloride and an aqueous solution of sodium chloride; the reagent A and the reagent B are stored separately; and the reagent A and the reagent B are used to be mixed on site so as to form the composite algaecide to be added. The method has the advantages of convenient operation, economical efficiency, practicability and capability of inactivating algal cells in a short time without destroying cell bodies, is characterized in safety and high efficiency, can effectively inhibit algae outbreak, and can obtain remarkable social and economic benefit.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a chemical algae removal method for lakes and reservoir water caused by eutrophication of water bodies, especially blue-green algae outbreaks. Background technique [0002] With the development of industry and agriculture, a large amount of nitrogen and phosphorus substances enter the lakes and rivers, the lakes and reservoirs alternate slowly, the self-purification ability is poor, and the water body carries multiple pollutions from point sources and non-point sources, all of which have exacerbated the process of eutrophication . 53%, 28%, 48% and 41% of the lakes in Europe, Africa, North America and South America were eutrophic to varying degrees, and 54% of the lakes in the Asia-Pacific region were in a state of eutrophication. In my country, 60% of the lakes are in eutrophic state, accompanied by the occurrence of algal blooms. The overgrowth of a large n...

AI Technical Summary

Problems solved by technology

At the end of May 2007, the cyanobacteria water crisis broke out in Taihu Lake, resulting in a large-scale water cut-off in Wuxi City, Jiangsu Province, which seriously affected the normal life and even life safety of the people.

Copper salts are the most commonly used, but excessive copper ions entering the environment can cause pressure on the environment; mercury agents have good biocidal effects, but are highly toxic and can cause serious public hazards, so their use should be prohibited; tin agents are generally used for marine ship shell coatings. Organic tin has a pungent smell, and human skin contact can cause dermatitis, which will pollute the environment and should be banned; chromate has a strong killing effect, but it is highly toxic to the environment and can cause cancer. Prohibited to use; the organic sulfur series are mainly dithiooleomethane, etc., such products can affect the hardness and pH value of water, cause certain environmental pollution, and cause corrosion of metal equipment, and the promotion value is not great

Quaternary phosphorus salt biocides have multiple functions such as corrosion inhibition, scale inhibition, and biocidal effects, but it is not clear whether they have residual effects, so they should be used with caution