BioChem - DOS

Evaluation of sweet potato for fuel bioethanol production: hydrolysis and fermentation

SpringerPlus

Lareo, Claudia; Ferrari, Mario Daniel; Guigou, Mairan; Fajardo, Lucí a; Larnaudie, Valeria; Ramí rez, Marí a Belé n; Martí nez-Garreiro, Jorge

<P>The enzymatic starch hydrolysis and bioethanol production from a variety of sweet potato developed for bioenergy purposes (K 9807.1) on the basis of its high starch yields, was studied. Drying at 55°C and 95°C of sweet potato neither affected the sugar content nor the starch enzymatic hydrolysis efficiency. Simultaneous saccharification and ethanol fermentations for dry matter ratio of sweet potato to water from 1:8 to 1:2 (w/v) were studied. Fresh sweet potato and dried at 55°C (flour) were assayed. At ratios of 1:8, similar results for fresh sweet potato and flour in terms of ethanol concentration (38&#x2013;45&nbsp;g/L), fermentation time (16&nbsp;h) and sugar conversion (~ 100%) were found. At higher dry matter content, faster full conversion were observed using flour. A higher ratio than that for fresh sweet potato (1:2.2) did not improve the final ethanol concentration (100&nbsp;g/L) and yields. High ethanol yields were found for VHG (very high gravity) conditions. The sweet potato used is an attractive raw matter for fuel ethanol, since up to 4800&nbsp;L ethanol per hectare can be obtained.</P>

2013

Springer International Publishing

cc-by

2193-1801

2

1

pp.493

10.1186/2193-1801-2-493

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART71733868

https://springerplus.springeropen.com/counter/pdf/10.1186/2193-1801-2-493

Sweet potato; Bioethanol; Saccharomyces cerevisiae; Alcoholic fermentation; Simultaneous saccharification and fermentation (SSF)