1980 年 44 巻 11 号 p. 2631-2635
O, O-Dimethyl phosphorodithioate (DMDTP) is the raw material for such organophosphorus pesticides as malathion, dimethoate and cidial, and is abundant in wastewater of pesticide manufacturers. The activated sludge was acclimated to DMDTP by the fill-and-draw method. The acclimated, activated sludge degraded 500 mg/liter of DMDTP in 7 hr and as a result, produced 260mg/liter of inorganic orthophosphate and 510mg/liter of sulfate. The pH of the mixed liquor was adjusted to degrade DMDTP, and the optimum pH was from 6.5 to 7.0. The activated sludge acclimated to DMDTP degraded dimethyl phosphorothioate, dimethyl phosphate, diethyl phosphorodithioate and diethyl phosphate.
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