Journal
BIORESOURCE TECHNOLOGY
Volume 109, Issue -, Pages 229-233Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.01.036
Keywords
Empty palm fruit bunch fiber; Sequential pretreatment; Diluted acid/alkaline pretreatment; Enzyme hydrolysis; Delignification
Funding
- Korea Institute of Energy Technology Evaluation and Panning (KETEP) [2010T100100690]
- Korea government Ministry of Knowledge Economy
- Korea government Ministry for Food, Agriculture, Forestry and Fisheries
- KRIBB
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Pretreatment processes are key technologies for generating fermentable sugars based on lignocellulosic biomass. In this study, we developed a novel method for empty palm fruit bunch fiber (EPFBF) using sequential pretreatment with dilute acid and then alkali. Dilute sulfuric acid was used in the first step, which removed 90% of the hemicellulose and 32% of the lignin, but left most of the cellulose under the optimum pretreatment condition. Sodium hydroxide was then applied in the second step, which extracted lignin effectively with a 70% delignification yield, partially disrupting the ordered fibrils of the EPFBF and thus enhancing the enzyme digestibility of the cellulose. The sequentially pretreated biomass consisted of 82% cellulose, less than 1% hemicellulose, and 30% lignin content afterward. The pretreated biomasses morphologically revealed rough, porous, and irregularly ordered surfaces for enhancing enzyme digestibility. These results indicate that the sequentially acid/alkali-pretreated EPFBF could be broadly useful as a novel biomass. (C) 2012 Elsevier Ltd. All rights reserved.
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