TECHNOLOGY FOR PREPARING ELECTROLYZED OXIDIZING WATER AND STUDY ON ITS GERMICIDAL EFFICACY

Objective To study the technology for preparing electrolyzed oxidizing water(EOW) and its germicidal efficacy.Methods Three-cell electrolysis technology and suspension quantitative germicidal test were used to carry out laboratory observation.Results The optimal conditions of three-cell electrolysis technology were sodium chloride concentration 50-70 g/L,electric current density 5 A/dm2 and electrolysis time 10-15 min.The indexes of EOW prepared by this technology were pH value 2.44,available chlorine content 39.76 mg/L and oxidation-reduction potential(ORP) value 1147 mV.The EOW prepared by this technology with a 2 min contact time killed 100% of Escherichia coli in suspension and killed 100% of Bacillus subtilis var.niger spores in suspension after contact for 30 min.Conclusions The production technology of the self-made electrolysis tank is simple,the indexes of the EOW prepared fulfils the requirements and the EOW has good germicidal efficacy.