The removal characteristics of composite odor and malodorous substances using 33 biofilters in sewage treatment facilities were investigated. The geometry mean values of composite odor and odor quotient were reduced by 52.7% and 59.2% at the outlet of the biofilters, respectively. The removal efficiencies of the biofiltes for the composite odor and odor quotient show a significant difference statistically(p=0.000<0.05). The median value of odor quotient of sulfur compounds was reduced by 69.1% at the outlet of the biofilter and the odor quotient of the sulfur compound at the inlet and outlet of the biofilter shows a significant difference statistically(p=0.000<0.05); on the other hand, those of the NH3 and trimethylamine, aldehydes, VOCs and alcohols, organic acids do not.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 조사대상 시설
  2.2. 시료채취 및 분석 방법
  2.3. 악취측정결과의 통계분석
 3. 결과 및 고찰
  3.1. 복합악취 및 악취농도지수를 이용한 바이오필터의효율 평가
  3.2. 지정악취물질을 이용한 바이오필터의 효율 평가
 4. 결 론
 참 고 문 헌

• 고병철(한국환경공단 악취관리센터) | Byung-Churl Ko (Odor Management Center, Korea Environment Corporation)
• 박영호(한국환경공단 악취관리센터) | Young-Ho Park (Odor Management Center, Korea Environment Corporation)
• 김동일(한국환경공단 악취관리센터) | Dong-Il Kim (Odor Management Center, Korea Environment Corporation)
• 이민규(부경대학교 화학공학과) | Min-Gyu Lee (Department of Chemical Engineering, Pukyong National University)
• 감상규(제주대학교 환경공학과) | Sang-Kyu Kam (Department of Environmental Engineering, Jeju National University) Corresponding author