Production of Bioethanol from Carrot Pomace Using the Thermotolerant Yeast Kluyveromyces marxianus

Chi-Yang Yu, Bo-Hong Jiang and Kow-Jen Duan
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Chi-Yang Yu: Department of Bioengineering, Tatung University, 40 Chungshan N. Rd. Sec. 3, Taipei 10452, Taiwan
Bo-Hong Jiang: Department of Bioengineering, Tatung University, 40 Chungshan N. Rd. Sec. 3, Taipei 10452, Taiwan
Kow-Jen Duan: Department of Bioengineering, Tatung University, 40 Chungshan N. Rd. Sec. 3, Taipei 10452, Taiwan

Energies, 2013, vol. 6, issue 3, 1-8

Abstract: 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 °C 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 °C 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.

Keywords: bioethanol; carrot pomace; Kluyveromyces marxianus; simultaneous saccharification and fermentation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2013
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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