Dilute Acid Pretreatment of Oil Palm Trunk Biomass at High Temperature for Enzymatic Hydrolysis

Published Date
Energy Procedia
November 2015, Vol.79:924–929, doi:10.1016/j.egypro.2015.11.588
2015 International Conference on Alternative Energy in Developing Countries and Emerging Economies
Open Access, Creative Commons license

Author 

• Pongsak Noparat ^a,,
 
• Poonsuk Prasertsan ^b,c
 
• Sompong O-Thong ^d
 
• Xuejun Pan ^e

• aProgram in Environmental Science, Faculty of Science and Technology, Suratthani Rajabhat University, Surat Thani 84100, Thailand
• bDepartment of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Songkhla 90112, Thailand
• cPalm Oil Products and Technology Research Center (POPTEC), Faculty of Agro-Industry, Prince of Songkla University, Songkhla 90112, Thailand
• dDepartment of Biology, Faculty of Science, Thaksin University, Phatthalung 93110, Thailand
• eBiological Systems Engineering, University of Wisconsin-Madison, 460 Henry Mall, Madison, WI 53706, United States

Available online 3 December 2015.

Abstract

Old oil palm trunk (OPT) is available in large quantity in Southeast Asia and a potential lignocellulosic biomass resource for bioethanol production. Dilute acid (DA) pretreatment was applied to the old oil palm trunk for enzymatic saccharification. The pretreatment conditions were investigated through a fractional factorial experiment design. The pretreated substrates were analyzed for chemical composition, and their enzymatic digestibility was investigated and compared. The results indicated that the DA pretreatment was able to improve enzymatic hydrolysis by removing hemicelluloses from OPT. Mild pretreatment preserved more hemicellulose and cellulose in pretreated OPT, but severe pretreatment was necessary to achieve satisfactory enzymatic hydrolysis of OPT. For example, the DA pretreatment with 3% H₂SO₄ at 180 °C for 40 min could achieve an 80% enzymatic hydrolysis.

Keywords

oil palm trunk

enzymatic hydrolysis

dilute acid pretreatment 

cellulosic ethanol

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• ☆
  Peer-review under responsibility of the Organizing Committee of 2015 AEDCEE.

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  Corresponding author. Tel.: +66 773 55633; fax: +66 773 55636.

Copyright © 2015 The Authors. Published by Elsevier Ltd.

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