Method of screening algicidal bacteria from soil in roots of Taihu lake reed and measuring algae-lytic effect of the algicidal bacteria

Abstract

The invention provides a method of screening algicidal bacteria from soil in roots of Taihu lake reed and measuring algae-lytic effect of the algicidal bacteria and belongs to the field of microbiology of cyanobacteria treatment. The invention provides a method of dissolving microcystis aeruginosa with the algicidal bacteria. In the method, a bacterial strain is separated and purified from the soil in roots of Taihu lake reed, and with the microcystis aeruginosa as an experiment raw material, a algicidal bacterial strain G6 is obtained. Under optimized conditions, the algicidal bacterial strain G6 reaches 82% in treatment effects on the microcystis aeruginosa and has significant algae-lytic effect. The soil in roots of Taihu lake reed can serve as a new source of the algicidal bacterial strain.

Description

technical field [0001] The invention belongs to the microbiological field of cyanobacteria treatment, and relates to a method for screening algae-dissolving bacteria from reed root soil in Taihu Lake and measuring the algae-dissolving effect thereof. Background technique [0002] With the acceleration of urbanization and the rapid development of industry and agriculture, a large amount of domestic sewage containing nitrogen, phosphorus, and potassium, as well as industrial and agricultural wastewater are discharged into rivers and lakes, resulting in serious eutrophication of water bodies and large-scale blue-green algae outbreaks. Cyanobacteria will not only destroy the ecological balance of the water body, consume dissolved oxygen in the water, cause the death of aquatic organisms, but also secrete algae toxins, substances that can threaten human health. [0003] The methods of algae control and algae removal are generally divided into physical methods, chemical methods an...

AI Technical Summary

Problems solved by technology

Physical methods include flocculation, manual salvage, air flotation algae removal, ultrasonic, etc. This method is simple to operate and has quick results, with less secondary pollution, but it cannot solve the problem from the root cause and requires a lot of manpower and material resources; the chemical method is through adding copper salt, high Potassium manganate and other chemical reagents can directly kill or inhibit the effect, but the strong lethality of chemical reagents will also poison the original aquatic organisms; biological methods control algae through biological chains or race competition. Including planting higher aquatic plants, cultivating aquatic animals and zooplankton that devour cyanobacteria, and adding efficient algae-dissolving bacteria