Characteristics of degradation of cyanobacteria, Microcystis aeruginosa, by Masugophota-Monas guttula were examined. Monoxenic M.guttula was isolated from sewage in the biological oxidation facility equipped in Kasumigaura Water Works. M.guttula was able to efficiently degrade viable cells of M.aeruginosain a short time. The removal of cells by M.guttula was 90% at 48 hr cultivation. The specific growth rate (µ) and generation time (tg) of M.guftuia were 4. l day−1 and 4.0 hr, respectively. The maximum specific growth rate(µmax) and saturation coefficient (Ks) of the microbe were 4.4day−1 and 2.4 mg/l with Lineweaver-Burke equation. Effects of physical factors on the removal of M.aeruginosa by M.guttula, pH and temperature were examined. Greater than 80% of removal was obtained at pH 7.0. At 30°C, the maximum removal was over 90% as compared with 20% at 5°C. It was clarified that M.guttula could effectively utilize M.aeruginosa as food, and it was found that pH and temperature were important physical factors to remove the Cyanobacterium M. aeruginosaby microflagellate M.guttula.

This content is only available as a PDF.
You do not currently have access to this content.