COMPARATIVE ANALYSIS OF THE EFFICIENCY OF SURFACE DISINFECTION IN AQUEOUS SOLUTIONS OF OZONE AND SODIUM HYPOCHLORITE
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Abstract
Disinfection of surfaces for various functional purposes is an important measure for the inactivation of microorganisms and viruses. This procedure is used almost everywhere, from water treatment facilities to medical institutions and public facilities. Among the most common disinfectants recommended by WHO are chlorine-containing substances. However, ozone is known to be a stronger oxidizing agent. This paper presents the results of a comparative analysis of the effectiveness of inactivation of yeast-like fungi Candida albicans, as well as gram-positive Bacillus subtilis and gram-negative bacteria Escherichia coli. For research, ozone solutions in water with a concentration of 0,5–1,5 mg/l and sodium hypochlorite solutions with an active chlorine concentration of 50–150 mg/l were used. Steel and polymer plates were used as substrates. Comparison of the CT criterion for the ratio of NaClO to aquated ozone at LD50 shows that the smallest difference is about 100 times when Candida albicans is inactivated, and the maximum difference is up to 230 times when Bacillus subtilis is inactivated.
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References
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