TITLE

Bioethanol Production from Ipomoea Carnea Biomass Using a Potential Hybrid Yeast Strain

AUTHOR(S)
Kumari, Rajni; Pramanik, Krishna
PUB. DATE
October 2013
SOURCE
Applied Biochemistry & Biotechnology;Oct2013, Vol. 171 Issue 3, p771
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The paper deals with the exploitation of Ipomoea carnea as a feedstock for the production of bioethanol. Dilute acid pretreatment under optimum conditions (3 %HSO, 120 °C for 45 min) produced 17.68 g L sugars along with 1.02 g L phenolics and 1.13 g L furans. A combination of overliming and activated charcoal adsorption facilitated the removal of 91.9 % furans and 94.7 % phenolics from acid hydrolysate. The pretreated biomass was further treated with a mixture of sodium sulphite and sodium chlorite and, a maximum lignin removal of 81.6 % was achieved. The enzymatic saccharification of delignified biomass resulted in 79.4 % saccharification with a corresponding sugar yield of 753.21 mg g. Equal volume of enzymatic hydrolysate and acid hydrolysate were mixed and used for fermentation with a hybrid yeast strain RPRT90. Fermentation of mixed detoxified hydrolysate at 30 °C for 28 h produced ethanol with a yield of 0.461 g g. A comparable ethanol yield (0.414 g g) was achieved using a mixture of enzymatic hydrolysate and undetoxified acid hydrolysate. Thus, I. carnea biomass has been demonstrated to be a potential feedstock for bioethanol production, and the use of hybrid yeast may pave the way to produce bioethanol from this biomass.
ACCESSION #
90291022

 

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