The Effect of Alkaline Addition in Hydrothermal Pretreatment of Empty Fruit Bunches on Enzymatic Hydrolysis Efficiencies

Published Date
2014, Vol.9:151–157, doi:10.1016/j.proche.2014.05.018
International Conference and Workshop on Chemical Engineering UNPAR 2013 (ICCE UNPAR 2013)
Open Access, Creative Commons license

Author 

M.S. Siti Aisyah ^a,,

Yoshimitsu Uemura ^a

Suzana Yusup ^b

aCenter for Biofuel & Biochemical Research, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak

bChemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak

Available online 1 August 2014.

Abstract

In general, lignocellulosic biomass contains three major components, namely lignin, hemicellulose and cellulose which are the polymers of C5 and C6 sugars. Thus, there is potential to utilize of this biomass for bioethanol production. The hydrolysis of cellulose into glucose was difficult due to the more fibrous nature and thus inhibit enzyme penetration into the cellulose. In order to solve this problem, hydrothermal pretreatment can be used for breaking the bonds within the lignin structure and increase the accessibility of enzyme into the cellulose. In this study, the effect of chemical addition, sodium hydroxide (NaOH) and calcium oxide (CaO) in hydrothermal pretreatment at 180 °C and 30 minutes reaction time of palm oil empty fruit bunches (EFB) on the enzymatic hydrolysis efficiencies was investigated. The enzymatic hydrolysis of hydrothermally pretreated EFB give the highest concentration of glucose at 0.67 g/L while the hydrothermally pretreated of EFB in the presence of NaOH gives the lowest glucose concentration 0.45 g/L.

Keywords

empty oil palm fruit bunches

hydrothermal pretreatment

glucose

alkaline

enzymatic hydrolysis.

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References

1. • [1]
   • Balat M. and Balat H. Recent trends in global production and utilization of bio-ethanol fuel. Appl Energy. 2009;86(11):2273-82.
2. • [2]
   • Taherzadeh M.J. and Karimi K. Acid-based hydrolysis processes for ethanol from lignocellulosic materials: A review. BioResources. 2007; 2(3):472-99.
3. • [3]
   • Gonzalez R., Treasure T., Phillips R., Jameel H. and Saloni D. Economics of cellulosic ethanol production: Green liquor pretreatment for softwood and hardwood, greenfield and repurpose scenarios. BioResources. 2011;6(3):2551-67.
4. • [4]
   • Cybulska I., Lei H. and Julson J. Hydrothermal pretreatment and enzymatic hydrolysis of prairie cord grass. Energy & Fuels. 2010: 24:718-27.
5. • [5]
   • Kumar S., Kothari U., Kong L., Lee Y.Y. and Gupta R.M. Hydrothermal pretreatment of switchgrass and corn stover for production of ethanol and carbon microspheres. Biomass Bioenergy. 2011;35(2):956-68.
6. • [6]
   • Ruiz H.A., Vicente A.A. and Teixeira J.A. Kinetic modelling of enzymatic saccharification using wheat straw pretreated under autohydrolysis and organosolv process. Industrial Crops & Products. 2012;36:100-7.
7. • [7]
   • Anderson, W.F., Dien B.S., Brandon S.K. and Peterson J.D. Assessment of Bermuda grass and bunch grasses as feedstock for conversion to ethanol.Appl. Biochem. Biotechnol. 2008;145:13-21.
8. • [8]
   • Liu C. and Wyman C. E. Partial flow of compressed-hot water through corn stover to enhance hemicellulose sugar recovery and enzymatic digestibility of cellulose. Bioresour. Technol. 2005;96:1978-85.
9. • [9]
   • Zhao X., Cheng K. and Liu D. Organosolv pretreatment of lignocellulosic biomass for enzymatic hydrolysis. Appl. Biochem. Biotechnol. 2009:82:815-827.

• ☆
  Peer-review under responsibility of the Organizing Committee of ICCE UNPAR 2013.

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  Corresponding author. Tel.: +605-3687645; fax: +605-3687649.

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