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Enhanced ethanol production from mild alkali-treated oil-palm empty fruit bunches via co-fermentation of glucose and xylose

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  • Kamoldeen, Ajijolakewu A.
  • Lee, Chee Keong
  • Wan Abdullah, Wan Nadiah
  • Leh, Cheu Peng

Abstract

Poor or non-utilisation of the xylose fractions of lignocellulosic biomass is a serious impediment to the achievement of energy security through lignocellulosic ethanol. In this work, the potential of sustainable ethanol production from oil palm empty fruit bunches (OPEFB) by co-fermentation of its glucose and xylose components was assessed. Simultaneous co-saccharification and co-fermentation (SScF) was compared with three other fermentation techniques to evaluate bioconversion of mild-alkaline-treated OPEFB for efficient bioethanol production. Hydrolysis was done by the synergistic actions of commercial cellulase (50 FPU/gds) supplemented with on-site crude hemicellulase at unit ratio of 1 FPU: 5 U. After pre-treatment, 79.0% and 79.3% respectively of total glucan and xylan were recovered while 91.9% and 90.6% of the respective polymers were hydrolyzed to fermentable sugars. At 3.4% (w/v) substrate loading, 89.5% theoretical ethanol yield, equivalent of 0.33 g/g raw OPEFB (418.9 L/tonne) was achieved by using SScF. This was higher than 84.9% (0.31 g/g = 397.6 L/tonne raw OPEFB) achieved by separate co-hydrolysis and co-fermentation (SHcF) which is the closest among other fermentation techniques compared. By our knowledge, the yield achieved by the co-fermentation techniques used in this study has not been reported in any previous research which produced ethanol from OPEFB.

Suggested Citation

  • Kamoldeen, Ajijolakewu A. & Lee, Chee Keong & Wan Abdullah, Wan Nadiah & Leh, Cheu Peng, 2017. "Enhanced ethanol production from mild alkali-treated oil-palm empty fruit bunches via co-fermentation of glucose and xylose," Renewable Energy, Elsevier, vol. 107(C), pages 113-123.
  • Handle: RePEc:eee:renene:v:107:y:2017:i:c:p:113-123
    DOI: 10.1016/j.renene.2017.01.039
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    References listed on IDEAS

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    1. Kuhad, Ramesh Chander & Gupta, Rishi & Khasa, Yogender Pal & Singh, Ajay & Zhang, Y.-H. Percival, 2011. "Bioethanol production from pentose sugars: Current status and future prospects," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(9), pages 4950-4962.
    2. Tye, Ying Ying & Lee, Keat Teong & Wan Abdullah, Wan Nadiah & Leh, Cheu Peng, 2011. "Second-generation bioethanol as a sustainable energy source in Malaysia transportation sector: Status, potential and future prospects," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(9), pages 4521-4536.
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    Cited by:

    1. He, Boyang & Hao, Bo & Yu, Haizhong & Tu, Fen & Wei, Xiaoyang & Xiong, Ke & Zeng, Yajun & Zeng, Hu & Liu, Peng & Tu, Yuanyuan & Wang, Yanting & Kang, Heng & Peng, Liangcai & Xia, Tao, 2022. "Double integrating XYL2 into engineered Saccharomyces cerevisiae strains for consistently enhanced bioethanol production by effective xylose and hexose co-consumption of steam-exploded lignocellulose ," Renewable Energy, Elsevier, vol. 186(C), pages 341-349.
    2. He, Dingping & Chen, Xueli & Lu, Minsheng & Shi, Suan & Cao, Limin & Yu, Haitao & Lin, Hao & Jia, Xiwen & Han, Lujia & Xiao, Weihua, 2023. "High-solids saccharification and fermentation of ball-milled corn stover enabling high titer bioethanol production," Renewable Energy, Elsevier, vol. 202(C), pages 336-346.
    3. Li, Jun & Zhao, Renyong & Xu, Youjie & Wu, Xiaorong & Bean, Scott R. & Wang, Donghai, 2022. "Fuel ethanol production from starchy grain and other crops: An overview on feedstocks, affecting factors, and technical advances," Renewable Energy, Elsevier, vol. 188(C), pages 223-239.
    4. Cardona, Eliana & Llano, Biviana & Peñuela, Mariana & Peña, Juan & Rios, Luis Alberto, 2018. "Liquid-hot-water pretreatment of palm-oil residues for ethanol production: An economic approach to the selection of the processing conditions," Energy, Elsevier, vol. 160(C), pages 441-451.
    5. Park, Jeong-Woo & Heo, Juheon & Ly, Hoang Vu & Kim, Jinsoo & Lim, Hankwon & Kim, Seung-Soo, 2019. "Fast pyrolysis of acid-washed oil palm empty fruit bunch for bio-oil production in a bubbling fluidized-bed reactor," Energy, Elsevier, vol. 179(C), pages 517-527.
    6. Suhartini, Sri & Rohma, Novita Ainur & Mardawati, Efri & Kasbawati, & Hidayat, Nur & Melville, Lynsey, 2022. "Biorefining of oil palm empty fruit bunches for bioethanol and xylitol production in Indonesia: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 154(C).

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