Valorization of extracts from sorghum stems (Sorghum saccharatum L.) by alcoholic bioconversion

Abstract

The present study aim to investigate the production of bioethanol by fermentation stems extracts from sorghum (Sorghum saccharatum L.) by using the Saccharomyces carlbergensis yeast. The monitoring of kinetic bioconversion parameters revealed that the average fermentation time of broths is 48 hours, with ethanol yields depending ofinitial concentration of yeast and presence of Urea used as a growth factor. The high yield of alcoholic bioconversion (50.25 ± 0.20 ml.kg-1) is obtained from the Urea enriched broth (2g.L-1), with yeast initial concentration of 1 g.L-1.This study indicated that the valorization of sorghum stems extracts by alcoholic bioconversion is a new way in the exploration of renewable bioenergy production.