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Title: Ethanosolv Pretreatment of Bamboo with Dilute Acid for Efficient Enzymatic Saccharification

Source: In: Proceedings of the 55th convention of Society of Wood Science and Technology, August 27-31, 2012 Beijing China. 9 p.

Author(s)Li, Zhiqiang; Jiang, Zehui; Fei, Benhua; Cai, Zhiyong; Pan, Xuejun

Publication Year: 2012  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4706-1B

Abstract: Bamboo is a potential lignocellulosic biomass for the production of bioethanol because of its high cellulose and hemicelluloses content. In this research, ethanosolv pretreatment catalyzed by sulfuric acid was studied in order to enhance enzymatic saccharification of moso bamboo. The addition of 2% (w/w on bamboo) sulfuric acid in water or 75% (v/v) ethanol was demonstrated effective in pretreatment and fractionation of bamboo. The ethanosolv pretreatment yielded a solid fraction with 84.5% cellulose. The cellulose-to-glucose conversion yields were 77.1% (ethanosolv) and 57.3%(water) after enzymatic hydrolysis of the solid fraction at 50 °C for 48 h using a enzyme loading (15 filter paper units of cellulase/g cellulose and 30 IU β-glucosidase/g cellulose). The concentrations of fermentation inhibitors such as 5-hydroxy-2- methyl furfural (HMF) and furfural were 0.96 g/L and 4.38 g/L, respectively, in the spent liquor after the ethanosolv pretreatment, which were slightly lower than those in the spent liquor from H2SO4-water treatment. When the pretreatment spent liquor was diluted with water, dissolved lignin was precipitated and then recovered through filtration. More than 87.2% of the original lignin in untreated bamboo was recovered as ethanol organosolv lignin.

Keywords: Bamboo; Bioethanol; Ethanosolv; Organosolv pretreatment; Dilute acid

Publication Review Process: Formally Refereed

File size: 162 kb(s)

Date posted: 01/20/2015

This publication is also viewable on Treesearch:  view
RITS Product ID: 71850
Current FPL Scientist associated with this product
Cai, Zhiyong
Supervisory Research Materials Engineer
  

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