Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/146975
Title: Quantification of viable bioaerosol emanation from an ACMV system and its impact on indoor bioaerosol pollution
Authors: Xiong, Jin Wen
Wan, Man Pun
Ng, Bing Feng
You, Siming
Keywords: Engineering::Chemical engineering
Issue Date: 2020
Source: Xiong, J. W., Wan, M. P., Ng, B. F. & You, S. (2020). Quantification of viable bioaerosol emanation from an ACMV system and its impact on indoor bioaerosol pollution. Aerosol and Air Quality Research, 20(4), 762-775. https://dx.doi.org/10.4209/aaqr.2019.05.0523
Project: RG190/14
MOE2016-T2-1-063
Journal: Aerosol and Air Quality Research
Abstract: Viable bioaerosol can deposit and multiply in air-conditioning and mechanical ventilation (ACMV) systems, eventually entering indoor environments after these systems are operated and contributing to indoor pollution. We propose a method for identifying and quantifying the emanation of viable bioaerosol from an ACMV system and its impact on indoor pollution through surface and air sampling followed by analysis using a material-balance model. Adopting this method, we investigated the contribution of viable bioaerosol from an ACMV system to the indoor pollution in an air-conditioned room located in Singapore. The system, which emanated viable bacteria and viable fungi at the rates of 2.4 CFU s–1 and 3.9 CFU s–1, respectively, was the largest source of indoor viable bacteria and the second largest source of indoor viable fungi (exceeded only by the outdoor fungi introduced through mechanical ventilation) in the air. Potentially pathogenic bioaerosol species in the genera of Staphylococcus, Moraxella and Aspergillus were also identified in the ACMV system. In particular, Moraxella osloensis, the most likely genus to originate from occupants, was found to accumulate in the ACMV system, indicating the potential effect of this system’s cleanliness on indoor pollution. Our method can be used as a tool for analysing the potential sources of indoor bioaerosol and supporting the development of effective control measures for bioaerosol emanation from ACMV systems.
URI: https://hdl.handle.net/10356/146975
ISSN: 1680-8584
DOI: 10.4209/aaqr.2019.05.0523
Rights: © 2020 Taiwan Association for Aerosol Research. All rights reserved. This paper was published in Aerosol and Air Quality Research and is made available with permission of Taiwan Association for Aerosol Research.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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