Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 19, Pages 9083-9089Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.07.001
Keywords
Lignin; Delignification; Enzymatic hydrolysis; Accessible pore volume; Crystallinity index
Funding
- Wood-to-Ethanol Research Consortium (WERC)
- Novozymes North America, Inc.
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The effect of delignification methods on enzymatic hydrolysis of forest biomass was investigated using softwood and hardwood that were pretreated at an alkaline condition followed by sodium chlorite or ozone delignification. Both delignifications improved enzymatic hydrolysis especially for softwood, while pretreatment alone was found effective for hardwood. High enzymatic conversion was achieved by sodium chlorite delignification when the lignin content was reduced to 15%, which is corresponding to 0.30-0.35 gig accessible pore volume, and further delignification showed a marginal effect. Sample crystallinity index increased with lignin removal, but it did not show a correlation with the overall carbohydrate conversion of enzymatic hydrolysis. (C) 2011 Elsevier Ltd. All rights reserved.
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