Observations on Disinfection Effects of Multifunctional Ozone Water Disinfection Machine

Objectives To observe ozone water's degradation effects to pesticides, disinfection effects to bacteria and fungi on fruits, vegetables as well as hands.

Methods Observations in laboratories was going on according to the requirements by "Technical Standard For Disinfection"(2002).

Results The ozone concentration in water is 0.280, 0.616, 0.796 and 1.15 mg/L after powered on 10, 20, 30 and 40 min respectively; the removal rates of ozone water to dimethoate, dichlorvos, malathion are 90.0%, 93.0%, and 99.0% respectively after powered on 20 min; the average killing log values are ≥3.00 when 0.3 mg/L ozone water react with E. coli for 4 mins, Staphylococcus aureus and Candida albicans for 8 mins respectively; the average killing log value is > 3.00 when 0.3 mg/L ozone water react with E. coli for 12 mins on cucumber surfaces; the average killing log value to natural bacteria on hands is 1.58 after wiping hands for 3 mins with 0.3 mg/L ozone water.

Conclusions The multifunctional ozone water disinfection machine has good degradation effects to pesticide, disinfecting effects to Staphylococcus aureus, Escherichia coli, Candida albicans, and those on the surface of fruits, vegetables and skin. It is suitable for households and medical institutions as to disinfection treatment.