Preprint Article Version 1 This version is not peer-reviewed

Bioaerosol Disinfection by a Cold Plasma Ionizer Coupled with an Electrostatic Precipitator

Version 1 : Received: 31 July 2024 / Approved: 31 July 2024 / Online: 31 July 2024 (11:53:32 CEST)

How to cite: Lim, W. Y. S.; Ow, S. Y.; Laura, S.; Lee, Y. Y.; Suwardi, A.; Tan, I.; Cheong, W. C. D.; Loh, X. J.; Su, X. Bioaerosol Disinfection by a Cold Plasma Ionizer Coupled with an Electrostatic Precipitator. Preprints 2024, 2024072577. https://doi.org/10.20944/preprints202407.2577.v1 Lim, W. Y. S.; Ow, S. Y.; Laura, S.; Lee, Y. Y.; Suwardi, A.; Tan, I.; Cheong, W. C. D.; Loh, X. J.; Su, X. Bioaerosol Disinfection by a Cold Plasma Ionizer Coupled with an Electrostatic Precipitator. Preprints 2024, 2024072577. https://doi.org/10.20944/preprints202407.2577.v1

Abstract

Despite the best efforts in air-purification, airborne infectious diseases do and will continue to spread due to continuous emission of bioaerosols by the host/infected person. To tackle the rapid spread of airborne infectious diseases, a shift in focus from air-purification to bioaerosol disinfection/ decontamination is urgently needed. In this work, we studied a cold plasma ionizer (CPI) and electrostatic precipitator (ESP)-coupled CPI (CPI-ESP) for disinfection and cleaning of bioaerosols. Using porcine respiratory coronavirus (PRCV) and E. coli in a testing chamber, we demonstrated that CPI coupled with ESP is an effective technology for inactivating aerosolized microorganisms and microorganisms spread on surfaces. In addition, we have demonstrated the efficiency of a CPI-ESP coupled device for disinfection of naturally occurring airborne microbials in a few indoor settings (i.e., an living room, a discussion room, a schoolroom and an office) to determine the treatment duration- and human activity-dependent efficacy. To understand the disinfection mechanism, we conduced fluorescence microscopy study to reveal different degree of bacteria cell membrane damage under CPI treatment.

Keywords

cold plasma ionizer; non-thermal plasma; electrostatic precipitator; porcine respiratory coronavirus; bacteria; bioaerosols; disinfection

Subject

Environmental and Earth Sciences, Environmental Science

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