In this study the growth and coagulation characteristics of Microcystis aeruginosa, a strain, bloom-forming blue-green algae, was investigated on the laboratory scale in order to obtain data on their influence to drinking water treatment process. This strain showed the optimal growth rate when the growth was at pH 9.0, and 25℃ for 14 days in the CB medium. The results of turbidity from 0 cell/mL was 0.06 NTU, 1.21×10^5 cell/mL was 0.19 NTU, 4.9×10^5 cell/mL was 0.18 NTU and 1.21×10^6 cell/mL was 0.18 NTU and zeta potential from 0 cell/mL was -11.20, 1.21×10^5 cell/mL was -14.80, 4.9×10^5 cell/mL was -17.15 and 1.21×10^5 cell/mL was -21.35 after coagulation. It was inverse proportion of residual cells to cell numbers after coagulation. We couldn`t remove some orgnic matters which have E_(254) and E_(260) through coagulation. As a result, coagulation was interrupted when the Microcystis aeruginosa was in water. |
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