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Techno-economic assessment of high-solid simultaneous saccharification and fermentation and economic impacts of yeast consortium and on-site enzyme production technologies

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  • Khajeeram, Sutamat
  • Unrean, Pornkamol

Abstract

An efficient simultaneous saccharification and fermentation (SSF) at high-solid loading are keys to the successful commercialization of lignocellulose-based process. In the present work, technological and economical potentials of high-solid SSF for sugarcane bagasse-to-ethanol conversion process [6] was analyzed based on process flowsheet simulation for an estimation of the minimal ethanol selling price (MESP). Based on techno-economic assessment a high-solid SSF process platform for a low-cost lignocellulosic ethanol production was designed composing of (1) yeast consortium for C5 and C6 sugars co-fermentation and (2) cellulase/on-site hemicellulase enzyme mixtures acting synergistically for efficient saccharification. Implementing the integrated SSF process with on-site enzymes and yeast consortium, the MESP could be reduced to as low as 15.7 Baht/L equivalent to 1.66 USD/gal which is a 6% lower than the current market selling price of 1.76 USD/gal. Thus, the on-site enzymes together with cellulase-hemicellulase synergism to lower enzyme demand as well as the yeast consortium technology to increase ethanol titer from C5/C6 co-fermentation would provide economic feasibility for the future cellulosic ethanol production in the industrial scale. Such process platform is also an important strategy for the development of low-cost biorefinery industry that can outperform the current sugar-based process for the production of biofuels.

Suggested Citation

  • Khajeeram, Sutamat & Unrean, Pornkamol, 2017. "Techno-economic assessment of high-solid simultaneous saccharification and fermentation and economic impacts of yeast consortium and on-site enzyme production technologies," Energy, Elsevier, vol. 122(C), pages 194-203.
    • Handle: RePEc:eee:energy:v:122:y:2017:i:c:p:194-203
    DOI: 10.1016/j.energy.2017.01.090
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    References listed on IDEAS

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    1. Chovau, Simon & Degrauwe, David & Van der Bruggen, Bart, 2013. "Critical analysis of techno-economic estimates for the production cost of lignocellulosic bio-ethanol," Renewable and Sustainable Energy Reviews, Elsevier, vol. 26(C), pages 307-321.
    2. Geraili, A. & Sharma, P. & Romagnoli, J.A., 2014. "Technology analysis of integrated biorefineries through process simulation and hybrid optimization," Energy, Elsevier, vol. 73(C), pages 145-159.
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    1. Li, Wen-Chao & Li, Xia & Zhu, Jia-Qing & Qin, Lei & Li, Bing-Zhi & Yuan, Ying-Jin, 2018. "Improving xylose utilization and ethanol production from dry dilute acid pretreated corn stover by two-step and fed-batch fermentation," Energy, Elsevier, vol. 157(C), pages 877-885.
    2. Salameh, Tareq & Tawalbeh, Muhammad & Al-Shannag, Mohammad & Saidan, Motasem & Melhem, Khalid Bani & Alkasrawi, Malek, 2020. "Energy saving in the process of bioethanol production from renewable paper mill sludge," Energy, Elsevier, vol. 196(C).
    3. Lu, Jie & Song, Fuyu & Liu, Hao & Chang, Chengcheng & Cheng, Yi & Wang, Haisong, 2021. "Production of high concentration bioethanol from reed by combined liquid hot water and sodium carbonate-oxygen pretreatment," Energy, Elsevier, vol. 217(C).
    4. Jiang, Xiaoxiao & Zhai, Rui & Li, Haixiang & Li, Chen & Deng, Qiufeng & Wu, Xuelan & Jin, Mingjie, 2023. "Binary additives for in-situ mitigating the inhibitory effect of lignin-derived phenolics on enzymatic hydrolysis of lignocellulose: Enhanced performance and synergistic mechanism," Energy, Elsevier, vol. 282(C).
    5. Molaverdi, Maryam & Karimi, Keikhosro & Mirmohamadsadeghi, Safoora, 2019. "Improvement of dry simultaneous saccharification and fermentation of rice straw to high concentration ethanol by sodium carbonate pretreatment," Energy, Elsevier, vol. 167(C), pages 654-660.

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