Kinetics and modeling of reductive dechlorination at high PCE and TCE concentrations

Biotechnology and Bioengineering
Seungho Yu, Lewis Semprini

Abstract

Two biokinetic models employing the Michaelis-Menten equation for anaerobic reductive dechlorination of tetrachloroethylene (PCE) and trichloroethylene (TCE) were developed. The models were compared with results from batch kinetic tests conducted over a wide range of PCE and TCE concentrations with two different dechlorinating cultures. One model applies Michaelis-Menten kinetics with competitive inhibition among chlorinated aliphatic hydrocarbons (CAHs), while the other model includes both competitive inhibition and Haldane inhibition at high CAH concentrations. Model simulations with competitive inhibition simulated the experimental results well for PCE concentrations lower than 300 microM. However, simulations deviated from the experimental observations for PCE or TCE concentrations greater than 300-400 microM. The kinetic model that incorporated both competitive and Haldane inhibitions better simulated experimental data for PCE concentrations near the solubility limit (1000 microM), and TCE concentrations at half its solubility limit (4000 microM). Based on the modeling analysis of the experimental results, the PM culture (Point Mugu, CA) had very high Haldane inhibition constants for cis-1,2-dichlororethylene (c-DCE) and v...Continue Reading

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Citations

Oct 1, 2011·Environmental Science & Technology·Winnie W M ChanElizabeth A Edwards
Feb 1, 2013·Environmental Science & Technology·Gretchen L W HeavnerRuth E Richardson
Dec 25, 2012·Applied and Environmental Microbiology·Rong YuDavid L Freedman
May 24, 2013·Journal of Contaminant Hydrology·Mark Harkness, Angela Fisher
Nov 28, 2013·Journal of Contaminant Hydrology·Uwe SchneidewindWinnie Dejonghe
Oct 21, 2015·Journal of Contaminant Hydrology·Thomas J PhelanJohn A Christ
Feb 23, 2012·Ground Water·Zuansi CaiDavid N Lerner
Aug 29, 2012·Biotechnology and Bioengineering·Julie C ChambonPhilip J Binning
Jul 28, 2016·The Science of the Total Environment·Li-Lian WenHe-Ping Zhao
Jul 6, 2016·Environmental Science & Technology·Sourjya Bhattacharjee, Subhasis Ghoshal
Dec 23, 2016·Environmental Science & Technology·Koshlan Mayer-BlackwellLewis Semprini
Jun 14, 2008·Journal of Contaminant Hydrology·Mohammad F AzizianLewis Semprini
Oct 19, 2017·FEMS Microbiology Ecology·Yi YangFrank E Löffler
May 14, 2009·Journal of Environmental Monitoring : JEM·Peter Ruiz-Haas, James Ingle
Mar 5, 2019·Journal of Environmental Management·Robert C BordenAdria A Bodour

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