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Assessment of Airborne Microorganisms in a Swine Wastewater Treatment Plant
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  • Journal title : Environmental Engineering Research
  • Volume 17, Issue 4,  2012, pp.211-216
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2012.17.4.211
 Title & Authors
Assessment of Airborne Microorganisms in a Swine Wastewater Treatment Plant
Kim, Ki-Youn; Ko, Han-Jong; Kim, Daekeun;
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Quantification of the airborne microorganisms (bacteria and fungi) at a swine wastewater treatment plant was performed. Microbial samples were collected at three different phases of the treatment process over a 1-yr period. Cultivation methods based on the viable counts of mesophilic heterotrophic bacteria and fungi were performed. The concentrations of airborne bacteria ranged up to about colony-forming unit (CFU)/, and those of airborne fungi ranged up to about . The primary treatment (e.g., screen, grit removal, and primary sedimentation) was found to be the major source of airborne microorganisms at the site studied, and higher levels of airborne bacteria and fungi were observed in summer. High levels of the respirable bioaerosol (0.65 to in size) were detected in the aeration phase. Among the environmental factors studied, temperature was strongly associated with fungal aerosol generation (with a Spearman correlation coefficient of 0.90 and p-value <0.01). Occupational biorisks are discussed based on the observed field data.
Bioaerosol;Seasonal variation;Size distribution;Swine wastewater;
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