Journal of Soil and Groundwater Environment (한국지하수토양환경학회지:지하수토양환경)

Korean Society of Soil and Groundwater Environment (한국지하수토양환경학회)
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Evaluation of the Laboratory-Scale Cometabolic Air Sparging Process : Characterization of Indigeneous Microorganism on MTBE Degradation

실험실 규모 Cometabolic Air Sparging 공정 적용 특성 평가 : 토양 내 활성미생물 별 MTBE 분해특성

  • An, Sang-Woo (Department of Civil & Environmental Engineering, Hanyang University) ;
  • Lee, Si-Jin (Department of Environmental Energy & System Engineering, Kyonggi University) ;
  • Chang, Soon-Woong (Department of Environmental Energy & System Engineering, Kyonggi University)
  • 안상우 (한양대학교 건설환경공학과) ;
  • 이시진 (경기대학교 환경에너지시스템공학과) ;
  • 장순웅 (경기대학교 환경에너지시스템공학과)
  • Received : 2009.07.29
  • Accepted : 2009.12.11
  • Published : 2010.02.28
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Abstract

Cometabolic air sparging (CAS) is a new and innovative technology that uses air sparging principles but attempts to optimize in situ contaminant degradation by adding a growth substrate to saturated zone. CAS relies on the degradation of the primary growth substrate and cometabolic substrate transformation in the saturated zone and in the vadose zone for volatilized contaminants. In this study, we have investigated to determine MTBE degradation pattern and microbial activity variation if using propane as a primary substrate at the condition of considering air injection rate and air injection pattern. Laboratory-scale two-dimentional aquifer physical model studies were used and the experimental results were represented that the optimal conditions were as air injection rate of 1,000 mL/min and pulsed air injection pattern (15 min on/off). Over 1,000 mL/min air injection rate and continuous air injection pattern was no affected to increase DO concentration. On the other hand, Injection of propane and propane-utilizing bacteria degraded MTBE partially. And also, injection of propane- and MTBE-utilizing bacteria effectively degraded MTBE and TBA production was observed.

Keywords

References

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