Published Date
Energy Procedia
November 2015, Vol.79:111–118, doi:10.1016/j.egypro.2015.11.490
2015 International Conference on Alternative Energy in Developing Countries and Emerging Economies
Open Access, Creative Commons license
Author
Abstract
Ethanol was produced from oil palm frond juice (OPFJ) by using Saccharomyces cerevisiae yeast cells. Experiments were operated in a batch mode by varying the oil palm age between 3-4, 4-7, 7-10, 10-20 and 20-25 years. Experimental results showed that OPFJ at 3-4 years gave the highest concentrations of glucose and ethanol as 31.26 and 11.50 g/l. Ethanol yield was 0.39 g-ethanol/g-glucose, which estimated as 76.47% of the theoretical yield (0.51 g-ethanol/g-glucose). Additionally, the Monod and modified Gompertz equations were used to describe the kinetics of substrate utilizationand product formation. The values of the kinetic parameters in Monod and modified Gompertz equations of OPFJ extracted from oil palm aged 3-4 years were evaluated: maximum specific growth rate (μmax) was 0.29 g/g-VSS.hr, saturation concentration (Ks) 47.05 g/l, maximum ethanol concentration (Pm) 11.50 g/l, maximum ethanol production rate (rp,m) 0.24 g./l.hr and lag phase 0.12 hr. Both models fitted well to the experimental data, which had the high regression coefficient values (R2>0.95).
Keywords
Oil palm frond juice
Kinetic modeling
Batch fementation
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http://www.sciencedirect.com/science/article/pii/S1876610215022225
Energy Procedia
November 2015, Vol.79:111–118, doi:10.1016/j.egypro.2015.11.490
2015 International Conference on Alternative Energy in Developing Countries and Emerging Economies
Open Access, Creative Commons license
Author
Available online 3 December 2015.
Abstract
Ethanol was produced from oil palm frond juice (OPFJ) by using Saccharomyces cerevisiae yeast cells. Experiments were operated in a batch mode by varying the oil palm age between 3-4, 4-7, 7-10, 10-20 and 20-25 years. Experimental results showed that OPFJ at 3-4 years gave the highest concentrations of glucose and ethanol as 31.26 and 11.50 g/l. Ethanol yield was 0.39 g-ethanol/g-glucose, which estimated as 76.47% of the theoretical yield (0.51 g-ethanol/g-glucose). Additionally, the Monod and modified Gompertz equations were used to describe the kinetics of substrate utilizationand product formation. The values of the kinetic parameters in Monod and modified Gompertz equations of OPFJ extracted from oil palm aged 3-4 years were evaluated: maximum specific growth rate (μmax) was 0.29 g/g-VSS.hr, saturation concentration (Ks) 47.05 g/l, maximum ethanol concentration (Pm) 11.50 g/l, maximum ethanol production rate (rp,m) 0.24 g./l.hr and lag phase 0.12 hr. Both models fitted well to the experimental data, which had the high regression coefficient values (R2>0.95).
Keywords
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- ☆Peer-review under responsibility of the Organizing Committee of 2015 AEDCEE.
- ⁎ Corresponding author. Tel.: +66 75672329; fax: +66 75672399.
Copyright © 2015 The Authors. Published by Elsevier Ltd.
http://www.sciencedirect.com/science/article/pii/S1876610215022225
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