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Journal Article 
Effects of o-dichlorobenzene preparation and polyhexamethylene biguanide hydrochloride on activated sludge 
Kakiichi, N; Kamata, S; Ito, O; Komine, KI; Otsuka, H; Uchida, K 
BIOSIS COPYRIGHT: BIOL ABS. The effect of disinfectants on activated sludge were studied using pretreated swine feces as waste water. Two disinfectants were used; an orthodichlorobenzene (ODCB) preparation, an insecticide, and polyhexamethylene biguanide hydrochloride (PHMB), a biguanide compound. The COD and transparency of the effluent, accumulation of MLSS and faunal characteristics of microorganisms (protozoa and metazoa) were investigated. The critical concentrations of the ODCB preparation and PHMB at which the effluent transparency was deteriorated were 80 and 20 mg/l respectively, and those at which the effluent COD was deteriorated were 30 and 20 mg/l respectively. The concentrations of these disinfectants at which the accumulation of MLSS was reduced were 150 and 20 mg/l respectively, and those at which the microorganisms were inhibited 30 and 8 mg/l respectively. Protozoa susceptible to the ODCB preparation were Vorticella and Trachelophyllum, and those to PHMB were Trachelophyllum and A 
BIOCHEMISTRY; ENVIRONMENTAL POLLUTANTS/POISONING; OCCUPATIONAL DISEASES; ANIMAL HUSBANDRY; DISEASE VECTORS; DISINFECTION; PEST CONTROL; PESTICIDES; AIR POLLUTION; SOIL POLLUTANTS; WATER POLLUTION; HERBICIDES; ARTIODACTYLA; Biochemical Studies-General; Toxicology-Environmental and Industrial Toxicology; Animal Production-General; Public Health-Disinfection and Vector Control; Public Health: Environmental Health-Air; 95-50-1