Algae-removing method

Abstract

The invention relates to a method for fast removing algae or inhibiting the growth of algae and in particular relates to a method for killing Microcystis aeruginosa or controlling the growth of Microcystis aeruginosa. The method comprises the following steps: regulating the pH value of an algae-containing water body to be treated to be more than 12.0 or less than 5.0, and performing illumination treatment; measuring the absorbance so as to detect the algae-removing effect, wherein the result shows that when the pH value is more than 12.0 or less than 5.0, the optical density (OD) value is still 0.05 after 18 days and Microcystins can not grow basically; and measuring the pH value of the treated water body, wherein the result shows that the pH value of the solution is 8.9 after 18 days in the alkaline environment. In practical applications, the alkaline condition of the water body is utilized to remove the algae, the pH value of the water body can not change largely, the dosage of other chemical reagents and the yield of sludge can be reduced and the method has a wider application prospect. The algae-removing method has the advantages of low cost, simplicity in operation and no secondary pollution.

Description

Technical field [0001] The invention relates to a method and application for quickly inhibiting the growth of algae, in particular to a method and application for inhibiting the growth of Microcystis aeruginosa. Background technique [0002] Since the last century, due to the increasing economic activities of human beings, various domestic sewage and urban wastewater are discharged into rivers, lakes and seas, causing water bodies to absorb too much nitrogen and phosphorus and other nutrients and become eutrophication, causing frequent occurrence of "water blooms". It has become one of the serious environmental disasters in the world today, which often occur in various lakes, rivers and sea areas in our country. The hazards are mainly manifested in: a large area of ​​the water surface is covered by algae, causing water corruption, resulting in suffocation of fish, etc.; many blue-green algae can produce algal toxins, such as Anabaena, fascicularia and Microcystis aeruginosa are t...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention lies in the high cost, secondary pollution, specificity, low effectiveness, and ecological destruction of traditional algae removal in terms of physical, chemical, and biological algae removal. Insufficient control of algae growth reduces the series of problems such as the high cost of traditional processes