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Ethanol fermentation in a yeast immobilized tubular fermentor
Author(s) -
Gencer M. A.,
Mutharasan R.
Publication year - 1983
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/bit.260250910
Subject(s) - fermentation , yeast , ethanol , ethanol fermentation , chemistry , yield (engineering) , ethanol fuel , dilution , product inhibition , chromatography , bioreactor , saccharomyces cerevisiae , biochemistry , bioconversion , enzyme , materials science , organic chemistry , non competitive inhibition , physics , metallurgy , thermodynamics
In this article, a mathematical model describing the kinetics of ethanol fermentation in a whole cell immobilized tubular fermentor is proposed. Experimental results show reasonable agreement with the proposed model. A procedure for treating the fermentation data for determining the ethanol inhibition constants k 1 and k 2 is described. The ethanol productivity of the immobilized cell fermentor is compared with those of traditional fermentors. Experimental studies indicate that with Saccharomyces cerevisiae (NRRL Y132) culture, ethanol productivity in the range 21.2–83.7 g ethanol L −1 h −1 at ethanol concentration of 76–60 g/L can be achieved. This is comparable to or higher than those reported in the literature for yeast. The product yield factor of 0.5 g ethanol/g glucose was obtained. The immobilized cell fermentor does not show washout at dilution rates of 7 h −1 and shows good stability over a 650‐h operating period.