퇴비화 시설과 매립장에서 배양 가능한 공기중 미생물의 분포 및 특성

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 mpaction-type sampler. Concentrations of heterotrophic bacteria averaged (in MPN/m³) 6.5×10³ (range 1.5×10²?1.5×10⁴) in the composting facility and 3.9×10³(range 6.0×10¹?9.3×10³) at the entrance of the facility. These concentrations were 460 and 280 times higher than 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 averaged 3.7×10² (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 7.9×10² MPN/m³ depending 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.