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Title 

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

Authors 

Seonghun KimJang Min ParkChul Ho Kim

Publisher 

Humana Press

Issue Date 

2013

Citation 

Applied Biochemistry and Biotechnology, vol. 169, no. 5, pp. 1531-1545

Keywords 

BioethanolJerusalem artichokeKluyveromyces marxianusSimultaneous saccharification and fermentationStalk

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.

ISSN 

0273-2289

Link 

http://dx.doi.org/10.1007/s12010-013-0094-5

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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