Electrochemical disinfection of fish pathogens in seawater without the production of a lethal concentration of chlorine using a flow reactor

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• 作者：Tsuyoshi Tanaka ; Mari Shimoda ; Nozomi Shionoiri ; Masahito Hosokawa ; Tomoyuki Taguchi ; Hitoshi Wake ; Tadashi Matsunaga
• 关键词：Electrochemical disinfection ; Marine pathogen ; Disinfection byproducts ; Flow reactor ; Lipid peroxidation
• 刊名：Journal of Bioscience and Bioengineering
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：116
• 期：4
• 页码：480-484
• 全文大小：1541 K

文摘

An electrochemical disinfection system employing a honeycombed platinum coated titanium electrode was developed for the disinfection of seawater. Cell suspensions (2?l, 10³?cells/ml) of the fish pathogens, Vibrio alginolyticus, Edwardsiella tarda, Lactococcus garvieae and Vibrio anguillarum were circulated in a reactor equipped with 10 sets of these electrodes at a flow rate of 200?ml/min with an applied potential of 1.0?V vs. Ag/AgCl reference electrode. The circulated cells were completely disinfected after 3?h of treatment, whereas free residual chlorine generated due to seawater electrolysis was below 0.1?ppm. In addition, a diphenyl-1-pyrenylphosphine fluorescent assay revealed that lipid peroxidation in the cell membranes of disinfected bacteria was induced probably by reactive oxygen species generated during electrochemical treatment.