PMID: 16509352Mar 3, 2006Paper

Cometabolic degradation of TCE vapors in a foamed emulsion bioreactor

Environmental Science & Technology
Eunsung Kan, Marc A Deshusses

Abstract

Effective cometabolic biodegradation of trichloroethylene (TCE) vapors in a novel gas-phase bioreactor called the foamed emulsion bioreactor (FEBR) was demonstrated. Toluene vapors were used as the primary growth substrate for Burkholderia cepacia G4 which cometabolically biodegraded TCE. Batch operation of the reactor with respect to the liquid feed showed a drastic decrease of TCE and toluene removal over time, consistent with a loss of metabolic activity caused by the exposure to TCE metabolites. Sustained TCE removal could be achieved when continuous feeding of mineral medium was implemented, which supported cell growth and compensated for the deactivation of cells. The FEBR exhibited its highest TCE removal efficiencies (82-96%) and elimination capacities (up to 28 gTCE m(-3) h(-1)) when TCE and toluene vapors were fed sequentially to circumvent the competitive inhibition by toluene. The TCE elimination capacity was 2-1000 times higher than reported in other gas-phase biotreatment reports. During the experiments, 85-101% of the degraded TCE chlorine was recovered as chloride. Overall, the results suggestthatthe FEBR can be a very effective system to treat TCE vapors cometabolically.

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Citations

May 8, 2009·Bioprocess and Biosystems Engineering·Farshid Ghorbani ShahnaSeyed Jamaleddin Shahtaheri
Nov 8, 2008·Biodegradation·Yili LiangHaichun Gao
May 27, 2014·Journal of Hazardous Materials·Liang ChenSong Jin
Apr 14, 2010·Biotechnology Advances·Chunping YangShenglian Luo
Oct 13, 2012·Critical Reviews in Biotechnology·Awadhesh Kumar ShuklaSuresh Kumar Dubey
Apr 18, 2012·Bioresource Technology·P BalasubramanianS Murty Bhallamudi
Jul 5, 2016·Biotechnology Advances·Yan ChengGuanlong Yu
Oct 12, 2007·Biotechnology and Bioengineering·Eunsung Kan, Marc A Deshusses
Oct 25, 2008·Biotechnology and Bioengineering·Eunsung Kan, Marc A Deshusses
Nov 29, 2011·Izvestiia Akademii nauk. Seriia biologicheskaia· Ten Khak Mun, O A Kirienko
Apr 11, 2012·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Amit KumarHerman Van Langenhove
Jan 9, 2021·Environmental Science and Pollution Research International·Chengda HeJianhua Hou
Jun 11, 2021·Critical Reviews in Biotechnology·Sang-Hun LeeEl-Sayed Salama
Nov 20, 2009·Environmental Science & Technology·Sudeep C Popat, Marc A Deshusses

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