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KMID : 0364820120480010008
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Korean Journal of Microbiology
2012 Volume.48 No. 1 p.8 ~ p.15
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Distribution and Characteristics of Culturable Airborne Microorganisms in Composting Facility and Landfill
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Lee Bo-Ra
Cha Min-Ju
Jeong Choon-Soo
Kim Jong-Seol
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Abstract
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Bioaerosols generated from composting facilities and landfills may create health risks for workers and nearby
residents. To determine the levels of culturable airborne bacteria and fungi in bioaerosols, samples were seasonally
collected at a composting facility and a landfill in Ulsan, Korea with an impaction-type sampler. Concentrations of
heterotrophic bacteria averaged (in MPN/m3) 6.5×103(range 1.5×102?1.5×104) in the composting facility and3.9×103(range 6.0×101?9.3×103) at the entrance of the facility. These concentrations were 460 and 280 times higherthan those of reference sites. Coliform bacteria were detected both inside and entrance of the facility. On the landfill,heterotrophic bacterial concentrations averaged (in MPN/m3) 4.9×102(range 1.7×102?1.0×103), while they averaged3.7×102(range 4.8×101?1.3×103) at the parking lot of the landfill. These concentrations were 35 and 26 times higher
than those of reference sites. When we isolated and tentatively identified heterotrophic bacteria, Pseudomonas
luteola was the most dominant species in bioaerosols from the composting facility, whereas the most abundant one
in reference samples was Micrococcus sp. Average concentrations of airborne fungi were measured between 4.8×102
and 7.9×102MPN/m3depending on sites, which were 2.1?3.4 times higher compared to those of reference sites.
While Cladosporium, Alternaria, and Penicillium were commonly identified fungal genera, genus Aspergillus was
identified only in bioaerosols from the composting facility
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KEYWORD
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airborne bacteria, airborne fungi, bioaerosol, composting facility, landfill
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