Ethanol production using whole plant biomass of Jerusalem artichoke by Kluyveromyces marxianus CBS1555

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Title
Ethanol production using whole plant biomass of Jerusalem artichoke by Kluyveromyces marxianus CBS1555
Author(s)
Seonghun Kim; Jang Min Park; Chul Ho Kim
Bibliographic Citation
Applied Biochemistry and Biotechnology, vol. 169, no. 5, pp. 1531-1545
Publication Year
2013
Abstract
Jerusalem artichoke is a low-requirement sugar crop containing cellulose and hemicellulose in the stalk and a high content of inulin in the tuber. However, the lignocellulosic component in Jerusalem artichoke stalk reduces the fermentability of the whole plant for efficient bioethanol production. In this study, Jerusalem artichoke stalk was pretreated sequentially with dilute acid and alkali, and then hydrolyzed enzymatically. During enzymatic hydrolysis, approximately 88 % of the glucan and xylan were converted to glucose and xylose, respectively. Batch and fed-batch simultaneous saccharification and fermentation of both pretreated stalk and tuber by Kluyveromyces marxianus CBS1555 were effectively performed, yielding 29.1 and 70.2 g/L ethanol, respectively. In fed-batch fermentation, ethanol productivity was 0.255 g ethanol per gram of dry Jerusalem artichoke biomass, or 0.361 g ethanol per gram of glucose, with a 0.924 g/L/h ethanol productivity. These results show that combining the tuber and the stalk hydrolysate is a useful strategy for whole biomass utilization in effective bioethanol fermentation from Jerusalem artichoke.
Keyword
BioethanolJerusalem artichokeKluyveromyces marxianusSimultaneous saccharification and fermentationStalk
ISSN
0273-2289
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s12010-013-0094-5
Type
Article
Appears in Collections:
Jeonbuk Branch Institute > Microbial Biotechnology Research Center > 1. Journal Articles
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