LYTIC CHARACTERISTICS OF BLUE-GREEN-ALGA, MICROCYSTIS-AERUGINOSA BY PSEUDOMONAS SP

Lytic characteristics of the blue-green alga, Microcystis aeruginosa by Pseudomonas sp., a strain isolated from the biofilm in a biological treatment facility, were examined in a batch culture experiment. The viable cells of M. aeruginosa were perfectly lysed by the agent for 5 d at 30-degrees-C in the dark. Optimum conditions for the lysis of M. aeruginosa were 35-degrees-C and pH 7.0. Several important parameters for the estimation of eutrophicated waters, chlorophyll a, turbidity and COD originating from M. aeruginosa were effectively reduced and their removal were 70%, 84% and 41%, respectively, under the condition of 5 d cultivation at 30-degrees-C. It was found that M. aeruginosa was efficiently lysed by the agent during a short time.