Sequential acid-/alkali-pretreatment of empty palm fruit bunch fiber

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• 作者：Seonghun Kim^a ; ^b ; ^{seonghun@kribb.re.kr} ; Jang Min Park^a ; Jeong-Woo Seo^a ; Chul Ho Kim^a ; ^{kim3641@kribb.re.kr}
• 关键词：Empty palm fruit bunch fiber ; Sequential pretreatment ; Diluted acid/alkaline pretreatment ; Enzyme hydrolysis ; Delignification
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：April, 2012
• 卷：109
• 期：Complete
• 页码：229-233
• 文件大小：325 K

摘要

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.