Characteristics of Removal of Bioaerosols by Dielectric Barrier Discharge

摘要

Bioaerosols (airborne bio-particles) can cause serious health hazards when they contaminate a human environment. In this study, we attempted to remove bioaerosols using a lab-made dielectric barrier discharge (DBD) reactor, and studied characteristics of removal of bioaerosols by DBD reactor. Total removal efficiency, collection efficiency, and sterilization efficiency of bioaerosols were up to 94%, 64%, and 83%, respectively, when 7.5 kV of applied voltage and 0.24 sec of residence time were employed. The performance of a DBD reactor can also be evaluated using specific input energy (SIE). In this study, the SIE susceptibility constant is suggested as a quantitative parameter for the estimation of ability to remove bioaerosols of collection and sterilization process by the DBD reactor. The SIE susceptibility constants of total removal process, collection process, and sterilization process are 0.00737, 0.00306, and 0.00431 L/J, respectively. The paper shows that the DBD reactor was effective in removing bioaerosols in the short time (0.24 sec) and under 12.8 W.