Deionized water, highly contaminated with Escherichia coli B and Salmonella typhimurium, was treated using a variety of non-chloride electrolyte solutions such as phosphates, nitrates, sulfates, benzoates and carbonates by pumping it through an electrochemical cell at low current (from 0.15 to 1.2 A), relatively low current densities (from 45 ma/cm2 to 360 ma/cm2) and initial voltage demand of 20-80 volts (close circulating system). It was shown that the electrolytic process generates free hydroxyl radicals and changes in redox potential. The process efficiency was estimated and the number of killed bacteria was directly proportional to the water treatment time and concentration of hydroxyl radicals generated by electrolysis. The presence of OH radicals was detected with N,N-dimethyl-p-nitrosoaniline used as a spin trap.

Chlorine-free disinfection of water contaminated with <i>Escherichia coli B </i>and <i>Salmonella typhimurium</i> by treatment with an alternating current: Role of electrolyte nature

242nd National Meeting (2011)

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Chlorine-free disinfection of water contaminated with Escherichia coli B and Salmonella typhimurium by treatment with an alternating current: Role of electrolyte nature