Study on disinfection effect of a novel plate ozone disinfector on air and object surface
Objective To observe the disinfection efficacy and corrosiveness to metals of a compact catalytic ozone generator on air and object surface in enclosed spaces.Methods Quantitative carrier tests and on-site tests were carried out to observe the disinfection effect and metal corrosion of an ozone disinfection device.Results The killing rate of the ozone disinfection device on Staphylococcus albus in air was 99.99%with 10 mg/m3 ozone for 30 min.For fabric carriers acted with 10 mg/m3 ozone,the killing logarithmic values were>3.00 against Escherichia coli for 40 min and against Staphylococcus aureus for 120 min. For Bacillus subtilis var. niger spores on the paper carrier, the killing logarithmic values were >3.00 with 30 mg/m3 ozone for 3 h. After being treated with ozone 20 mg/m3 for 20 cycles, totaling 60 h, minimal corrosion was observed on stainless steel, carbon steel, copper, and aluminum. Conclusion The ozone disinfection device can be used for air and object surface disinfection at room temperature, achieving highly effective disinfection. It can achieve efficient disinfection of paper bacterial carriers and has little corrosive effect on metals.
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