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Experimental evaluation of a model for cometabolism: Prediction of simultaneous degradation of trichloroethylene and methane by a methanotrophic mixed culture
Author(s) -
Chang Wangkuan,
Criddle Craig S.
Publication year - 1997
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/(sici)1097-0290(19971205)56:5<492::aid-bit3>3.0.co;2-d
Subject(s) - cometabolism , trichloroethylene , chemistry , methane , transformation (genetics) , substrate (aquarium) , methane monooxygenase , anaerobic oxidation of methane , biodegradation , biological system , environmental chemistry , ecology , organic chemistry , biochemistry , biology , bioremediation , contamination , gene
A model for cometabolism is verified experimentally for a defined methanotrophic mixed culture. The model includes the effects of cell growth, endogenous cell decay, product toxicity, and competitive inhibition with the assumption that cometabolic transformation rates are enhanced by reducing power obtained from oxidation of growth substrates. A theoretical transformation yield is used to quantify the enhancement resulting from growth substrate oxidation. A systematic method for evaluating model parameters independently is described. The applicability of the model is evaluated by comparing experimental data for methanotrophic cometabolism of TCE with model predictions from independently measured model parameters. Propagation of errors is used to quantify errors in parameter estimates and in the final prediction. The model successfully predicts TCE transformation and methane utilization for a wide range of concentrations of TCE (0.5 to 9 mg/L) and methane (0.05 to 6 mg/L). © 1997 John Wiley & Sons, Inc. Biotechnol Bioeng 56: 492–501, 1997.