Control of Indoor Fungal Bioaerosols by Using Ozone
Most of people spend eighty to ninety percent of their time indoors due to lifestyle changes in Taiwan. The probabilities to expose to bioaerosols threat through indoor air are increasing. The objectives of this study were to disinfect indoor fungal bioaerosols by using high concentration ozone and assess the feasibility of purified indoor bioaerosols by ozone. Two kinds of fungal bioaerosols (C. famata and P. citrinum) with concentrations of 106CFU/m3 were generated by Collison three-jet nebulizer. The germicidal effects to bioaerosols of ozone were measured at ozone concentration of 0~175ppm, relative humidity of 30~70％, and exposed time of 1~10sec. The results indicated that the needed concentrations of ozone to reach disinfection efficacy of 90％ (at relative humidity of 70％ and expose time of 10sec) for Candida famata var. flareri and Penicillium citrinum spore bioaerosols were 100 and 150ppm respectively. The orders of germicidal efficacy of ozone to bioaersols were Candida famata var. flareri > Penicillium citrinum spore. Increasing of relative humidity and exposure time could enhance the germicidal efficacy of ozone to the two fungal bioaerosols. Summary, the germicidal efficacies of ozone to two types of bioaerosols (one vegetative cells and one spore) were above 90％. Therefore, the ozone disinfection system had high germicidal efficacy showed that ozone was a feasible method to control indoor fungal bioaerosols and improve indoor air quality.
Ozone Bioaerosol Fungi Indoor air quality
Hsiao-Lin Huang Jen-Hsuan Tai
Institute of Industrial Safety and Disaster Prevention,Chia Nan University of Pharmacy and Science,Tainan 71710,Taiwan
国际会议
西安
英文
731-736
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）