Effects of Electron Acceptors and Acclimation on the Anaerobic Degradation of Benzene, Toluene, and meta-Xylene

Benzene, Toluene, meta-Xylene의 혐기성 분해에 미치는 전자수용체와 시료 적응의 영향

  • Yoon, In-Kil (Department of Environmental Science, Inje University) ;
  • Kwon, O-Seob (Department of Environmental Science, Inje University) ;
  • Kim, Sang-Jin (Marine Biology Research division, KORDI)
  • 윤인길 (인제대학교 환경학과) ;
  • 권오섭 (인제대학교 환경학과) ;
  • 김상진 (해양연구소 해양생물연구부)
  • Received : 1998.06.29
  • Accepted : 1998.07.24
  • Published : 1998.09.01

Abstract

The effects of electron acceptors and acclimation of inoculum on the anaerobic degradation of benzene, toluene, and m-xylene (BTX) were investigated to enhance the rate of degradation by estuarine sediment inoculum. With the fresh sediment inocula, degradation of BTX ensued after a 10-week acclimation period, and 37~61% of benzene and 57~61% of toluene were degraded after 16 weeks. Sediments from heavily contaminated sites showed higher degradation rates of BTX. After a 6-month of acclimation, degradation onset rapidly from the time of BTX addition and no difference was found among the sediment inocula. Single compound of BTX was slowly degraded in the methanogenic conditions, however, the degradation of BTX mixture was slow in the denitrifying conditions. Although the degradation rate of m-xylene was the fastest among the components of BTX mixture, longer acclimation enhanced the degradation rate of BTX, especially that of benzene. When the culture fluids were tested with Microtox, anaerobic degradation of BTX reduced the toxicity of BTX as well.

Keywords

BTX;anaerobic degradation;electron acceptors;acclimation

Acknowledgement

Supported by : 환경부, 과학기술처