Record Display for the EPA National Library Catalog


Main Title Alternative Nonlinear Model for Estimating Second-Order Rate Coefficients for Biodegradation.
Author Suflita, J. M. ; Smolenski, W. J. ; Robinson, J. A. ;
CORP Author Oklahoma Univ., Norman. Dept. of Botany and Microbiology. ;Upjohn Co., Kalamazoo, MI.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Year Published 1987
Report Number EPA-R-811146 ;EPA-R-812808; EPA/600/J-87/132;
Stock Number PB88-149117
Additional Subjects Biodeterioration ; Cresols ; Anaerobic conditions ; Sludge ; Mathematical models ; Substrates ; Nonlinear programming ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB88-149117 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 7p
A modification of the second-order model for biodegradation was derived, applied to an example data set and shown to be superior for describing the anaerobic biodegradation of p-cresol by an enriched bacterial consortium. The modified model circumvents the no-growth assumption implicit in the use of the second-order rate equation, but still requires the assumption of first-order kinetics over the course of substrate depletion. Violation of the no-growth assumption is particularly important since overestimates of the pseudo-first-order rate coefficient lead to underestimates of the time required for the removal of a xenobiotic chemical from a contaminated environment. Calculations show that the errors introduced into the pseudo-first-order rate coefficient (and the resulting estimates of the second-order rate coefficient) approach 100% if one doubling occurs in activity over the course of substrate depletion. (Copyright (c) 1987, American Society for Microbiology.)