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COAGULANT-PRODUCING MICROORGANISM HAVING ORGANIC ACID SUBSTRATE ASSIMILATING CHARACTERISTIC, ITS MICROBIAL COAGULANT, AND TREATMENT OF SEWAGE AND SLUDGE USING THE COAGULANT
COAGULANT-PRODUCING MICROORGANISM HAVING ORGANIC ACID SUBSTRATE ASSIMILATING CHARACTERISTIC, ITS MICROBIAL COAGULANT, AND TREATMENT OF SEWAGE AND SLUDGE USING THE COAGULANT
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机译:具有有机酸基质同化特性的产生凝结剂的微生物,其微生物凝结剂以及使用凝结剂处理污水和污泥的方法
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摘要
PROBLEM TO BE SOLVED: To obtain a coagulant-producing microorganism capable of producing a microbial coagulant having high coagulation activity at a low cost in a medium containing an organic acid obtained from sewage sludge, etc., as a substrate by separating soil, sludge, etc., with an acetic acid-propionic acid medium as a separation source. SOLUTION: The coagulant-producing microorganism is Citrobacter TKF04 strain (FERM P-16722) proliferative by using an organic acid as a substrate. The microorganism is cultured in a liquid medium prepared by using an organic acid as a substrate and the cultured liquid or the supernatant obtained by removing the microbial cells from the cultured liquid is concentrated and dried by ultrafiltration membrane, etc., or the precipitate is recovered by ethanol precipitation process and the precipitate is desalted (dialyzed) to obtain the objective microbial coagulant. The microbial coagulant produced by the above method is added to the inflow water or treated water of a sewage treatment plant to effect the coagulation and precipitation of sludge and solid material or added to raw sludge or digested sludge to effect the dehydration of the sludge.
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