Estimating the cellular maintenance coefficient and its use in the design of two-phase partitioning bioscrubbers

Bioprocess and Biosystems Engineering
S H YeomDavid R Nielsen

Abstract

One of the key roles of an organic solvent has emerged to be the enhancement of oxygen transfer in two-phase partitioning bioscrubbers (TPPBs). In order to determine an optimum organic fraction for a given VOCs loading, the oxygen demand of the total cell mass must be estimated, which depends upon the magnitude of the cellular maintenance coefficient. We have estimated the dynamics of the maintenance coefficient for benzene degradation by Achromobacter xylosoxidans Y234 in a TPPB and found that the maintenance coefficient generally decreased as cells accumulated in the TPPB but converged to a specific value of 1.750 x 10(-2) h(-1) at biological steady state. Due to its important influence on all of the essential design parameters of the TPPB system, including optimum organic fraction, aeration rate and agitation speed, the maintenance coefficient should be considered as a key biological determinant for microorganism selection, as well as in overall TPPB design.

References

Aug 1, 1979·Journal of Bacteriology·W ChesbroR Eifert
Oct 12, 1965·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·S J Pirt
Dec 15, 2000·Biotechnology and Bioengineering·S H Yeom, A J Daugulis
Feb 24, 2005·Biotechnology and Bioengineering·David R NielsenP James McLellan
Jul 26, 2006·Biotechnology and Bioengineering·F Javier Alvarez-HornosMarta Izquierdo
Mar 3, 2007·Microbial Ecology·Peter van Bodegom
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Jun 20, 1989·Biotechnology and Bioengineering·B G TurnerN B Jansen
Sep 13, 2008·Applied Microbiology and Biotechnology·M Concetta TomeiAndrew J Daugulis
May 1, 2009·Biotechnology and Bioengineering·Jennifer V Littlejohns, Andrew J Daugulis

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Citations

Apr 9, 2011·Applied Microbiology and Biotechnology·Andrew J DaugulisBenoit Guieysse

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