Journal
BIORESOURCE TECHNOLOGY
Volume 164, Issue -, Pages 292-298Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.04.075
Keywords
Poplar; Alkaline peroxide; Semi-simultaneous saccharification and fermentation; Bioethanol; Inhibitors
Funding
- China National Funds for Distinguished Young Scientists [31225005]
- Chinese Ministry of Education [113014A]
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To improve ethanol productivity with few inhibitors generated, a novel process of combined alkaline peroxide (AP) pretreatment and semi-simultaneous saccharification and fermentation (SSSF) was developed in this work. Pretreatment with 10% (g(H2O2)/g(wood)) H2O2 at 160 degrees C for 2 h followed by SSSF was found to be the optimal combination with remarkably increased ethanol yield. The proposed process resulted in 63.1% of ethanol yield, which was about five times more than that of the untreated sample that was processed using conventional simultaneous saccharification and fermentation (SSF). The efficient conversion was ascribed to the high delignification efficiency (64.9%) of AP pretreatment, which led to incompact structure and generation of fewer inhibitors during SSSF (c. 6 g/L of lactic acid) than SSF (c. 10 g/L of lactic acid). This combined approach was proved to be an effective method for the promotion of the bioconversion of lignocellulosic materials. (C) 2014 Elsevier Ltd. All rights reserved.
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