%0 Journal Article
%T Production of Bioethanol from Carrot Pomace Using the Thermotolerant Yeast Kluyveromyces marxianus
%A Chi-Yang Yu
%A Bo-Hong Jiang
%A Kow-Jen Duan
%J Energies
%D 2013
%I MDPI AG
%R 10.3390/en6031794
%X Carrot pomace, a major agricultural waste from the juice industry, was used as a feedstock for bioethanol production by fermentation with the thermotolerant yeast Kluyveromyces marxianus. Treatment of the carrot pomace with Accellerase TM 1000 and pectinase at 50 ˇăC for 84 h, resulted in conversion of 42% of its mass to fermentable sugars, mainly glucose, fructose, and sucrose. Simultaneous saccharification and fermentation (SSF) at 42 ˇăC was performed on 10% ( w/ v) carrot pomace; the concentration of ethanol reached 18 g/L and the yield of ethanol from carrot pomace was 0.18 g/g. The highest ethanol concentration of 37 g/L was observed with an additional charge of 10% supplemented to the original 10% of carrot pomace after 12 h; the corresponding yield was 0.185 g/g. Our results clearly demonstrated the potential of combining a SSF process with thermotolerant yeast for the production of bioethanol using carrot pomace as a feedstock.
%K bioethanol
%K carrot pomace
%K Kluyveromyces marxianus
%K simultaneous saccharification and fermentation
%U http://www.mdpi.com/1996-1073/6/3/1794