e-Journal
Paper Type ![]() |
Contributed Paper |
Title ![]() |
Improved SSF-cellulosic ethanol production by the cellobiose fermenting yeast Kluyveromyces marxianus G2-16-1 |
Author ![]() |
Ancharida Akaracharanya*[a], Kridsana Krisomdee [b], Vasana Tolieng [c], Vichien Kitpreechavanich [d] and Somboon Tanasupawat [e] |
Email ![]() |
sanchari@chula.ac.th |
Abstract: Ethanol production from a cellulosic substrate by the simultaneous saccharification and fermentation (SSF) process was compared between the thermotolerant cellobiose fermenting yeast, Kluyveromyces marxianus G2-16-1, and the thermotolerant Saccharomyces cerevisiae G5-7-2 strain that had almost same efficiency to produce ethanol from glucose, as well as between them. The ethanol productivity of K. marxianus G2-16-1 from the lignocellulosic fiber of cassava waste pulp was 0.27 g L-1 h-1, some 1.17-fold higher than that for S. cerevisiae G5-7-2 (0.23 g L-1 h-1). Enhancement of the end-product inhibition effect of cellulase by the addition of 10% (w/v) carboxymethyl cellulose to increase the amount of digestible cellulose substrate and a two-fold increased level of cellulase into the SSF-cellulosic fermentation process increased the ethanol productivity of K. marxianus G2-16-1 1.78-fold to 0.48 g L-1 h-1, but decreased that for S. cerevisiae G5-7-2 to 0.21 g L-1 h-1. The co-culture of K. marxianus G2-16-1 with S. cerevisiae G5-7-2 could increase the ethanol productivity of S. cerevisiae G5-7-2 from 0.21 to 0.42 g L-1 h-1. Thus K. marxianus G2-16-1, which can hydrolyze cellobiose to glucose, is therefore able to accelerate the ethanol production rate from a cellulosic substrate in the SSF process. |
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Start & End Page ![]() |
985 - 996 |
Received Date ![]() |
2014-09-26 |
Revised Date ![]() |
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Accepted Date ![]() |
2014-12-22 |
Full Text ![]() |
Download |
Keyword ![]() |
Kluyveromyces marxianus, ethanol, cellobiose, simultaneous saccharification and fermentation |
Volume ![]() |
Vol.43 No.5 (OCTOBER 2016) |
DOI |
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Citation |
Akaracharanya*[a] A., [b] K.K., [c] V.T., [d] V.K. and [e] S.T., Improved SSF-cellulosic ethanol production by the cellobiose fermenting yeast Kluyveromyces marxianus G2-16-1, Chiang Mai Journal of Science, 2016; 43(5): 985-996. |
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