Degradation of blue green alga,Microcystis aeruginosaby flagellata,Monas guttula

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Abstract
Characteristics of degradation of blue‐green alga, Microcystis aeruginosa by Mastigophora‐Monas guttula were examined. Monoxenic M. guttula was isolated from sewage in the biological oxidation facility equipped in Kasumigaura Water Works. M.guttula could efficiently degrade viable cells of M. aeruginosa during a short time. The removal of the cells by M. guttula was 90% at 48 hours cultivation. The specific growth rate (μ) and generation time (tg) of M. guttula were 4.1 day−1and 4.0 hour, respectively. While, maximum specific growth rate (μma x) and saturation coefficient (Ks) of the microbe were 4.4 day−1 and 2.4 mg/1 with Lineweaver‐Burk equation. It was clarified that M. guttula could effectively utilize M. aeruginosa as a food for its strong affinity and reactivity.