Proceedings of The 8th International Conference on Innovation in Science and Technology
Disinfection System for Public Transport using Aerosolized Hydrogen Peroxide
Attapol Arunwuttipong, Sanong Ekgasit
During the Covid-19 pandemic, public transportation has been debated to be associated with an increased risk of viral transmission, especially on long distance public buses due to confined space, inadequate ventilation, and long exposure time. Effective disinfection in public transportation can minimize the contact transmission. The aim of this study is to validate the disinfection efficacy of low concentration Aerosolized Hydrogen Peroxide (aHP). Aerosolized droplets of 5% HP were generated from an ultrasonic atomizer in order to fumigate 3 intercity public buses in Trat province of Thailand. The validation process for disinfection was conducted using both a chemical indicator and spore discs biological indicator (inoculated with 106 Geobacillus stearothermophilus enclosed in glassine envelopes). The chemical and biological indicators were placed at all corners and hard-to-reach locations in the bus. The results showed that aerosolized period of 30 minutes was effective for sporicidal 6-log reductions. The microbicidal efficacy of aHP in public buses was comparable to sterilization. The automated hydrogen peroxide aerosolized system is a highly effective and versatile method.
Keywords: aerosolized hydrogen peroxide; hydrogen peroxide fumigation; surface disinfection; surface decontamination; public transport.