Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Evaluation of Biodegradation Kinetic in Biological Activated Carbon (BAC) Process for Drinking Waste Treatment : Effects of EBCT and Water Temperature

정수처리용 생물활성탄 공정에서 Halonitromethanes (HNMs)의 생물분해 동력학 평가 : EBCT 및 수온의 영향

  • Son, Hee-Jong (Water Quality Institute, Water authority, Busan) ;
  • Kang, So-Won (Department of Bio-chemical Engineering, Friedrich-Alexander University) ;
  • Yoom, Hoon-Sik (Water Quality Institute, Water authority, Busan) ;
  • Ryu, Dong-Choon (Water Quality Institute, Water authority, Busan) ;
  • Cho, Man-Gi (Department of Global Biotechnology, Dong-Seo University)
  • 손희종 (부산광역시 상수도사업본부 수질연구소) ;
  • 강소원 (프리드리히-알렉산더대학교 생명화학공학과) ;
  • 염훈식 (부산광역시 상수도사업본부 수질연구소) ;
  • 류동춘 (부산광역시 상수도사업본부 수질연구소) ;
  • 조만기 (동서대학교 글로벌 생명공학과)
  • Received : 2015.06.18
  • Accepted : 2015.07.29
  • Published : 2015.07.31
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Abstract

In this study, the effects of empty bed contact time (EBCT) and water temperature on the biodegradation of 9 halonitromethanes (HNMs) in biological activated carbon (BAC) process were investigated. Experiments were conducted at three water temperatures ($10^{\circ}C$, $15^{\circ}C$ and $25^{\circ}C$) and three EBCTs (5, 10 and 15 min). Increasing EBCT and water temperature increased the biodegradation efficiency of HNMs in BAC column. Dibromochloronitromethane (DBCNM) and tribromonitromethane (TBNM) showed the highest biodegradation efficiency, but chloronitromethane (CNM) and dichloronitromethane (DCNM) were the lowest. The kinetic analysis suggested a pseudo-first-order reaction model for biodegradation of 7 HNMs at various water temperatures and EBCTs. The pseudo-first-order biodegradation rate constants ($k_{bio}$) of 7 HNMs ranged from $0.0797{\sim}0.7657min^{-1}$ at $10^{\circ}C$ to $0.1245{\sim}1.8421min^{-1}$ at $25^{\circ}C$. By increasing the water temperature from $10^{\circ}C$ to $25^{\circ}C$, the biodegradation rate constants ($k_{bio}$) were increased 1.6~2.4 times.

생물활성탄(BAC) 공정에서의 공탑 체류시간(EBCT) 및 수온의 변화에 따른 9종의 halonitromethanes (HNMs)류들의 생물분해 특성을 평가하였다. 수온 $10^{\circ}C$와 $25^{\circ}C$에서 EBCT를 5분~15분까지 변화시켜 실험하였다. 생물활성탄 공정에서 HNMs류 9종의 생물분해율은 EBCT와 수온에 따라 큰 영향을 받았으며 EBCT와 수온이 증가할수록 생물분해율이 증가하였으며, HNMs류들의 종류에 따른 생물활성탄 공정에서의 생물분해율은 DBCNM과 TBNM이 가장 높았고, CNM과 DCNM이 가장 낮았다. DBCNM과 TBNM을 제외한 HNMs류 7종에 대해 BAC 공정에서의 생물분해 속도상수($k_{bio}$)는 수온이 $10^{\circ}C$에서 $25^{\circ}C$로 상승하였을 경우, $0.0797{\sim}0.7657min^{-1}$에서 $0.1245{\sim}1.8421min^{-1}$로 증가하여 1.6~2.4배 정도 증가하였다.

Keywords

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