BioChem - DOS

The influence of presaccharification, fermentation temperature and yeast strain on ethanol production from sugarcane bagasse

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

de Souza, Carlos J.A.; Costa, Daniela A.; Rodrigues, Marina Q.R.B.; dos Santos, Ancé ly F.; Lopes, Mariana R.; Abrantes, Aline B.P.; dos Santos Costa, Patrí cia; Silveira, Wendel Batista; Passos, Flá via M.L.; Fietto, Luciano G.

<P><B>Highlights</B></P><P>&#x025BA; We isolated of the <I>S. cerevisiae</I> LBM-1 strain, which is capable of growth at 42&deg;C. &#x025BA; We compared the capacity of different yeast strains to ferment sugar cane bagasse. &#x025BA; Presaccharification stage is key to increasing ethanol yields. &#x025BA; Use of thermotolerant yeasts increase the yield of the SSF process.</P> <P><B>Abstract</B></P><P>Ethanol can be produced from cellulosic biomass in a process known as simultaneous saccharification and fermentation (SSF). The presence of yeast together with the cellulolytic enzyme complex reduces the accumulation of sugars within the reactor, increasing the ethanol yield and saccharification rate. This paper reports the isolation of <I>Saccharomyces cerevisiae</I> LBM-1, a strain capable of growth at 42&deg;C. In addition, <I>S. cerevisiae</I> LBM-1 and <I>Kluyveromyces marxianus</I> UFV-3 were able to ferment sugar cane bagasse in SSF processes at 37 and 42&deg;C<I>.</I> Higher ethanol yields were observed when fermentation was initiated after presaccharification at 50&deg;C than at 37 or 42&deg;C. Furthermore, the volumetric productivity of fermentation increased with presaccharification time, from 0.43g/L/h at 0h to 1.79g/L/h after 72h of presaccharification. The results suggest that the use of thermotolerant yeasts and a presaccharification stage are key to increasing yields in this process.</P>

2012

0960-8524

109

pp.63-69

10.1016/j.biortech.2012.01.024

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART58595338

Simultaneous saccharification and fermentation; Ethanol; Sugarcane bagasse; Thermotolerant yeast