Effects of condensational growth on culturability of airborne bacteria: Implications for sampling and control of bioaerosols

Chul Woo Park, Ki Young Yoon, Young Do Kim, Jae Hong Park, Jungho Hwang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The effect of condensational growth, one of the important characteristics for both monitoring and controlling bioaerosols, on bioaerosol culturability was assessed in this study. Three species of bacteria (Staphylococcus epidermidis, Pseudomonas fluorescens, and Escherichia coli) were used. The measured growth factors of the bioaerosols ranged from 1.07 to 1.67 under various conditions and these data coincided with calculated results using both the thermodynamic approach and the moment method. The culturable fractions obtained using an Anderson type impactor were observed to increase as a result the formation of the liquid layer around the bioaerosols via condensational growth of the particle, which correspondingly resulted in both increase of physical collection efficiency and decrease of impaction stress. The culturable fractions of sampled bioaerosols increased up to 43% (for S. epidermidis), 27% (for P. fluorescens), and 12% (for E. coli) by condensational growth, compared to no condensational growth. However, the culturable fraction decreased when the condensational growth was excessive, probably due to heat transfer to the bioaerosols during the condensational process.

Original languageEnglish
Pages (from-to)213-223
Number of pages11
JournalJournal of Aerosol Science
Volume42
Issue number4
DOIs
Publication statusPublished - 2011 Apr

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Pollution
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Atmospheric Science

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