抄録
Abstract
The formation of trihalomethane precursor from Microcystis aeruginosa was investigated by the culture in the laboratory. Culture medium was taken periodically during the growth period. Both filtrate and residue which were separated by filtration of the culture medium were chlorinated and the concentration of trihalomethane produced was measured by head space method.
Amounts of trihalomethane produced from the filtrate are much more than those from the residue after the stationary growth phase of Microcystis aeruginosa. And the trihalomethane formation potential reaches to 32.7 (THMp g / TOC mg).
Besides, by gel chromatography using Sephadex G-25, organics in the filtrate are fractionated into three components. The second fractionated component which molecular weight is about 2, 000-3, 000 showed the highest trihalomethane formation potential. It is concluded that this component is different from the extracelluar matrix of Microcystis aeruginosa judging from the results of gel chromatography and trihalomethane formation potential.
