活性汚泥微生物の酸素吸収に及ぼす消毒剤の影響

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This paper describes the results concerning the effects of various disinfectants on the oxygen uptake rate (OUR) of activated sludge (AS). To start with, in vitro inhibitory effects of four test disinfectants : STERIHYDE^[○!R], HYAMINE-T^[○!R], ISODINE^[○!R] and HYPAL No.20^[○!R], on OUR of two kinds (AS-A ; Kamaboko fishcake industrial waste water and AS-B ; local municipal sewage) of AS were determined by the previously mentioned method. The IC_<50> values of thirty-three kinds of typical disinfectants were measured for AS-A, respectively. GRINCE^[○!R], termed 2,4,4'-trichloro-2'-hydroxydiphenyl ether (0.3% Irgasan DP 300), and Irgasan DP 300 alone, inhibited most strongly by the IC_<50> values of 6 mg/l, respectively, and followed by Cetylpyridinium chloride (20 mg/l), OSVAN^[○!R] (58 mg/l), HYAMINE-T^[○!R] (58 mg/l), Potassium permanganate (60 mg/l), Thimerosal (65 mg/l) and Benzethonium chloride (80 mg/l). However, with Phenol, Suponated cresol, Resorcin, Silver nitrate, Medical soap, Bronopol and Acrinol, the concentration of these disinfectants which results in the IC_<50> value were over 1000 mg/l. In addition, the toxic effects on OUR of AS in the presence of an equivalent mixture of two disinfectants tend to become stronger than that of the disinfectant alone. Namely, the additive effects of OUR-inhibition seemed to exist (For example ; Saponated cresol-STERIHYDE^[○!R], HIBITANE^[○!R]-GRINCE^[○!R] etc.).
社団法人日本薬学会の論文
1995-04-30

活性汚泥微生物の酸素吸収に及ぼす消毒剤の影響

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