유기성 폐기물 자원화 시설에서 발생되는 부유 세균의 분포 특성

• 영문명: Distribution Characteristics of Airborne Bacteria in Organic-Waste Resource Facilities
• 발행기관: 한국환경보건학회
• 저자명: 김기연(Ki Youn Kim) 고한종(Han Jong Ko) 김대근(Daekeun Kim)
• 간행물 정보: 『한국환경보건학회지』제38권 제2호, 151~158쪽, 전체 8쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 2012.04.30

영문 초록

Objectives: Bioaerosols released by treating organic-waste resources cause a variety of environmental and hygiene problems. The objective of this study was to investigate the distribution characteristics of the airborne bacteria emitted from a pig manure composting plant, a principal site for organic-waste resource facilities. Methods: Three types of pig manure composting plant were selected based on fermentation mode: screw type, rotary type and natural-dry type. Each site was visited and investigated on a monthly basis between September 2009 and August 2010. A total of 36 air samplings were obtained from the pig manure composting plants. The air sampling equipment was a six-stage cascade impactor. Quantification and qualification of airborne bacteria in the air samples was performed by agar culture method and identification technique, respectively. Results: The mean concentrations of airborne bacteria in pig manure composting plant were 7,032 (±1,496) CFU m−3 for screw type, 3,309 (±1,320) CFU m−3 for rotary type, and 5,580 (±1,106) CFU m−3 for natural dry type. The screw type pig manure composting plant showed the highest concentration of airborne bacteria, followed by the natural dry type and the rotary type. The ratio of respirable to total airborne bacteria was approximately 40-60%. The predominant genera of airborne bacteria identified were Micrococcus spp., Staphylococcus spp. and Escherichia spp. Conclusion: Monthly levels of airborne bacteria were highest in August and lowest in November regardless of fermentation mode. There was no significant correlation relationship between airborne bacteria and environmental factors such as temperature, relative humidity and particulate matters in pig manure composting plants.

키워드

airborne bacteria bioaerosols composting pig manure