Publication: Evaluation of an electronic air filter for filtrating bacteria and viruses from indoor air
Issued Date
2009-09-01
Resource Type
ISSN
01251562
Other identifier(s)
2-s2.0-70349820545
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Southeast Asian Journal of Tropical Medicine and Public Health. Vol.40, No.5 (2009), 1113-1120
Suggested Citation
Kaewjai Malaithao, Thareerat Kalambaheti, Suwalee Worakhunpiset, Pongrama Ramasoota Evaluation of an electronic air filter for filtrating bacteria and viruses from indoor air. Southeast Asian Journal of Tropical Medicine and Public Health. Vol.40, No.5 (2009), 1113-1120. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/27937
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Evaluation of an electronic air filter for filtrating bacteria and viruses from indoor air
Other Contributor(s)
Abstract
This study compared the filtrating efficiency (FE) of a commercial electronic air filter for filtering bacteria and viruses from contaminated air with a high efficiency particulate air (HEPA) filter. An enclosed chamber was constructed, in the middle of which an air filter was placed for testing. MTB H37Ra and T7 virus at concentrations of 5×108 each were sprayed into one side of the chamber using a nebulizer and the sprayed samples were collected by an impinger air-sampler on the other side. MTB and T7 viruses were detected by PCR and culture. The PCR could detect samples down to 10 fg for MTB H37Ra and 1 pg for T7 virus. Most MTB H37Ra sprayed failed to culture. S. aureus at a concentration of 105 cfu and E. coli at a concentration of 104 cfu along with T7 virus were filtered out with a FE of more than 99%. T7 virus has a particle size of 0.04 μm, S. aureus has a particle size of 1 μm and E. coli has a particle size of 2 μm.