期刊
BIORESOURCE TECHNOLOGY
卷 241, 期 -, 页码 900-907出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.06.026
关键词
Bioethanol; Acorn starch; Tannin extraction; Very high gravity fermentation
资金
- National Key Research and Development Program of China [2017YFB0306800]
- 111 project [B13005]
The bioethanol production from a novel non-grain feedstock, acorn starch, was studied in this work. The inhibition of tannin in strain growth was investigated, and the effect of tannin was negligible when the tannin concentration was lower than 1 g/L in medium. Therefore, the extraction of tannin was performed using 40% (v/v) ethanol-water solution as the solvent for three times under the conditions of solid/liquid ratio 1: 20, 60 degrees C, 3 h, by which more than 80% of tannin in acorn was extracted and the content of tannin in acorn decreased from 7.4% (w/w) to 1.5% (w/w). Very high gravity (VHG) fermentation technology was subsequently carried out to achieve a high ethanol concentration at 86.4 g/L. A comprehensive process for bioethanol production from acorn starch was designed and a preliminary economic assessment was then performed revealing that this process appeared technically and economically justified. (C) 2017 Elsevier Ltd. All rights reserved.
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