Journal
BIORESOURCE TECHNOLOGY
Volume 100, Issue 14, Pages 3570-3575Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2009.02.040
Keywords
Wheat straw; Ionic liquids; 1-Ethyl-3-methyl imidazolium diethyl phosphate; Pretreatment; Enzymatic hydrolysis
Funding
- CAS 100 Talents [KGCX2-YW-801]
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology [2008004]
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This study aims to establish a cellulose pretreatment process using ionic liquids (ILs) for efficient enzymatic hydrolysis. The IL 1-ethyl-3-methyl imidazolium diethyl phosphate ([EMIM]DEP) was selected in view of its low viscous and the potential of accelerating enzymatic hydrolysis, and it could be recyclable. The yield of reducing sugars from wheat straw pretreated with this IL at 130 degrees C for 30 min reached 54.8% after being enzymatically hydrolyzed for 12 h. Wheat straw regenerated were hydrolyzed more easily than that treated with water. The fermentability of the hydrolyzates, obtained after enzymatic saccharification of the regenerated wheat straw, was evaluated using Saccharomyces cerevisiae. This microbe could ferment glucose efficiently, and the ethanol production was 0.43 g/g glucose within 26 h. In conclusion, the IL [EMIM]DEP shows promise as pretreatment solvent for wheat straw, although its cost should be reduced and in-depth exploration of this subject is needed. (C) 2009 Elsevier Ltd. All rights reserved.
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