BioChem - DOS

Comparing cell viability and ethanol fermentation of the thermotolerant yeast Kluyveromyces marxianus and Saccharomyces cerevisiae on steam-exploded biomass treated with laccase

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Moreno, A.D.; Ibarra, D.; Ballesteros, I.; Gonzalez, A.; Ballesteros, M.

In this study, the thermotolerant yeast Kluyveromyces marxianus CECT 10875 was compared to the industrial strain Saccharomyces cerevisiae Ethanol Red for lignocellulosic ethanol production. For it, whole slurry from steam-exploded wheat straw was used as raw material, and two process configurations, simultaneous saccharification and fermentation (SSF) and presaccharification and simultaneous saccharification and fermentation (PSSF), were evaluated. Compared to S. cerevisiae, which was able to produce ethanol in both process configurations, K. marxianus was inhibited, and neither growth nor ethanol production occurred during the processes. However, laccase treatment of the whole slurry removed specifically lignin phenols from the overall inhibitory compounds present in the slurry and triggered the fermentation by K. marxianus, attaining final ethanol concentrations and yields comparable to those obtained by S. cerevisiae.

2013

Elsevier Applied Science

0960-8524

135

pp.239-245

10.1016/j.biortech.2012.11.095

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART65836459

Cell viability; Ethanol fermentation; Kluyveromyces marxianus; Laccase detoxification; Saccharomyces cerevisiae