期刊
BIOCHEMICAL ENGINEERING JOURNAL
卷 104, 期 -, 页码 98-105出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.bej.2015.04.009
关键词
Cellulose; Lignin; Cellulase; Simultaneous saccharification and fermentation (SSF); Separate hydrolysis and fermentation (SHF); Ethanol
资金
- INALENTEJO/QREN, within the project BioEcos-Valorizacao Integrada de Biomassa
- FCT, the Portuguese Foundation for Science and Technology [Pest-C/CTM/LA0011/2013]
- Latvian National Research Programme Forest and earth entrails resources: research and sustainable utilization - new products and technologies (ResProd)
Biofuels are suitable alternatives to conventional and fossil fuels that pose serious environmental adverse effects to society. Bioethanol is the most promising biofuel and can be generated from lignocellulosic biomasses. Forest residues are outside the human food chain and inexpensive raw materials, but they need a previous pretreatment, in order to improve the cellulose accessibility for further bioconversion. The study of bioethanol production from rockrose pretreated by steam explosion (SE) was carried out employing separate enzymatic hydrolysis and fermentation (SHF) or simultaneous saccharification and fermentation (SSF) approaches. Saccharification of untreated rockrose attained only 0.9% of sugars yield. However, the steam explosion pretreatment promoted the disruption of interfibrillar surfaces of fibers with partial degradation of lignin thus enhancing the accessibility of polysaccharides toward enzymatic hydrolysis. Alkaline extraction after steam explosion pretreatment of rockrose residue (R-SE-OH) led to the partial removal of lignin, hemicelluloses, and other degradation products from fibre surface allowing an increase of 75% in the glucose yield. Bioethanol production in SSF mode was faster and slightly more efficient process than SHE providing the best results: ethanol concentration of 16.1 g L-1, fermentation efficiency of 69.8% and a yield of 22.1 g ethanol/100 g R-SE-OH. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据