Abstract
An investigation was conducted to study the effect of solvent composition and temperature on the efficiency of pretreatment prior to enzymatic hydrolysis. The aim was to improve the sugar recovery of oil palm empty fruit bunch fiber (EFBF) through enzymatic hydrolysis. Two types of pretreatments, namely, acidified-glycerol (AC-g) pretreatment and alkaline-glycerol (AL-g) pretreatment were conducted. The study proved that AL-g pretreatment promoted higher delignification and enzymatic hydrolyzed sugar yield compared to AC-g pretreatment. Total sugar recovery of 81.44 and 96.55 % was achieved from AL-g pretreatment at 80 and 120 °C respectively, following the enzymatic hydrolysis. However, downstream industrial processes, involving enzyme treatment along the processing line have the preference of acidic condition. Thus, AC-g pretreatment was favorable. Approximately 51.74 % total sugar had been recovered successfully from enzymatic hydrolysis of EFBF after 3 h of pretreatment by using solvent comprising of 50 % acetic acid and 80 % aqueous glycerol at a ratio of 97:3 at 120 °C.
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Acknowledgments
Our deepest appreciation to Ministry of Science, Technology and Innovation (MOSTI) for the financial support given in conducting this research under the Grant scheme with project code No. 10-05-MGI-GMB001. The research was also financially supported by grant obtained through the Industrial Biotechnology Scheme with code no DIP-2012-018 (Enzyme and microbial biotransformation of plant fiber for the production of vanillic acid and vanillin).
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Ling, T.P., Hassan, O., Badri, K. et al. Sugar recovery of enzymatic hydrolysed oil palm empty fruit bunch fiber by chemical pretreatment. Cellulose 20, 3191–3203 (2013). https://doi.org/10.1007/s10570-013-0033-1
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DOI: https://doi.org/10.1007/s10570-013-0033-1