Deionized water, highly contaminated with Campylobacter jejuni was treated using a variety of non-chloride electrolyte solutions such as phosphates and sulfates by pumping it through an electrochemical cell at low current (from 0.15 to 0.8 A), relatively low current densities (from 40 ma/cm2 to 350 ma/cm2) and initial voltage demand of 20-80 volts (close circulating system). The different nature of electrode materials (stainless steel, titanium and nickel) has been investigated. It was found that in case of using phosphates the sanitizing effect is mostly related to the formation of hydrogen peroxide which has been experimentally confirmed by Ghormley's colorimetric method. The possibility of an additional formation of hydroxyl radicals which are able to contribute in killing bacteria due to well known Fenton reaction between hydrogen peroxide and iron (2+) cations (formed at low concentration from stainless steel electrodes under AC-electrolysis conditions) is discussed.

Chlorine-free disinfection of water contaminated with<i> Campylobacter jejuni</i> by treatment with an alternating current: Role of hydrogen peroxide formation

245th National Meeting (2013)

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Chlorine-free disinfection of water contaminated with Campylobacter jejuni by treatment with an alternating current: Role of hydrogen peroxide formation