バッチ式海水電解装置の魚類病原細菌およびウイルスに対する殺菌効果

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The bactericidal and virucidal effects of hypochlorite produced by batch electrolytic system were examined for fish pathogens. Sodium chloride solutions, ranging from 0.5 to 3%, were electrolyzed and the concentration of chlorine produced was measured. Almost same concentration of chlorine was produced when 1.0% or more NaCl solution and seawater were electrolyzed. Fish pathogenic bacteria or virus was added to electrolyzed water and exposed to hypochlorite. More than 99% cells of Vibrio anguillarum, causative agent of fish vibriosis, were killed when the bacteria were exposed to 0.21 mg/l hypochlorite for 1 min. Yellowtail ascites virus (YAV) and hirame rhabdovirus (HIRRV), the causative agents of viral ascites disease and rhabdovirus disease of marine fish, were inactivated more than 99% after treatment with 0.42 mg/l hypochlorite for 1 min. The number of viable bacteria in the hatchery supply-seawater was reduced more than 99% when the water was treated with hypochlorite of 0.54 mg/l for 1 min. And more than 99% cells of viable bacteria in the waste-seawater were killed when the water was treated with hypochlorite of 0.64 mg/l for 5 min. The batch system developed in this study revealed remarkable bactericidal and virucidal effects, which were very similar to those in continuous flow-water system.バッチ式海水電解装置を用い，3%食塩水を電気分解して得られた電解水の魚類痛原細菌あるいはウイルスの殺菌・不活化効果を検討した。同時に飼育用水ならびに飼育排水の殺菌効果も検討した。1%濃度以上の食塩水を電気分解すると海水程度の次亜塩素酸が生成した。有効塩素濃度0.21mg/l，1分間の処理で供試細菌が99%以上，0.42mg/l，1分間の処理で供試ウイルスが99%以上不活化された。飼育用濾過海水については0.54mg/l，1分間の処理で99%以上，飼育排水についても0.64mg/l，5分間の処理で99%以上の殺菌効果が得られた。また，流水式海水電解装置との比較試験により，両装置はほぼ同等の殺菌能力を有すことが明らかになった。
2001-06-20

バッチ式海水電解装置の魚類病原細菌およびウイルスに対する殺菌効果

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