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Fermentation medium and oxygen transfer conditions that maximize the xylose conversion to ethanol by Pichia stipitis

Author

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  • Silva, João Paulo A.
  • Mussatto, Solange I.
  • Roberto, Inês C.
  • Teixeira, José A.

Abstract

The xylose conversion to ethanol by Pichia stipitis was studied. In a first step, the necessity of supplementing the fermentation medium with urea, MgSO4 × 7H2O, and/or yeast extract was evaluated through a 23 full factorial design. The simultaneous addition of these three nutritional sources to the fermentation medium, in concentrations of 2.3, 1.0, and 3.0 g/l, respectively, showed to be important to improve the ethanol production in detriment of the substrate conversion to cell. In a second stage, fermentation assays performed in a bioreactor under different KLa (volumetric oxygen transfer coefficient) conditions made possible understanding the influence of the oxygen transfer on yeast performance, as well as to define the most suitable range of values for an efficient ethanol production. The most promising region to perform this bioconversion process was found to be between 2.3 and 4.9 h−1, since it promoted the highest ethanol production results with practically exhaustion of the xylose from the medium. These findings contribute for the development of an economical and efficient technology for large scale production of second generation ethanol.

Suggested Citation

  • Silva, João Paulo A. & Mussatto, Solange I. & Roberto, Inês C. & Teixeira, José A., 2012. "Fermentation medium and oxygen transfer conditions that maximize the xylose conversion to ethanol by Pichia stipitis," Renewable Energy, Elsevier, vol. 37(1), pages 259-265.
    • Handle: RePEc:eee:renene:v:37:y:2012:i:1:p:259-265
    DOI: 10.1016/j.renene.2011.06.032
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    Cited by:

    1. Arora, Richa & Behera, Shuvashish & Sharma, Nilesh Kumar & Kumar, Sachin, 2017. "Augmentation of ethanol production through statistically designed growth and fermentation medium using novel thermotolerant yeast isolates," Renewable Energy, Elsevier, vol. 109(C), pages 406-421.
    2. Rita H. R. Branco & Mariana S. T. Amândio & Luísa S. Serafim & Ana M. R. B. Xavier, 2020. "Ethanol Production from Hydrolyzed Kraft Pulp by Mono- and Co-Cultures of Yeasts: The Challenge of C6 and C5 Sugars Consumption," Energies, MDPI, vol. 13(3), pages 1-15, February.
    3. Zhao, Chen & Zou, Zongsheng & Li, Jisheng & Jia, Honglei & Liesche, Johannes & Chen, Shaolin & Fang, Hao, 2018. "Efficient bioethanol production from sodium hydroxide pretreated corn stover and rice straw in the context of on-site cellulase production," Renewable Energy, Elsevier, vol. 118(C), pages 14-24.
    4. Xu, Chaozhong & Liu, Xu & Ding, Chenrong & Zhou, Xin & Xu, Yong & Gu, Xiaoli, 2023. "Power consumption and oxygen transfer optimization for C5 sugar acid production in a gas-liquid stirred tank bioreactor using CFD-Taguchi method," Renewable Energy, Elsevier, vol. 212(C), pages 430-442.
    5. Neitzel, Thiago & Lima, Cleilton Santos & Biazi, Luiz Eduardo & Collograi, Karen Cristina & Carvalho da Costa, Aline & Vieira dos Santos, Leandro & Ienczak, Jaciane Lutz, 2020. "Impact of the Melle-Boinot process on the enhancement of second-generation ethanol production by Spathaspora passalidarum," Renewable Energy, Elsevier, vol. 160(C), pages 1206-1216.
    6. Dussán, Kelly J. & Silva, Débora D.V. & Perez, Victor H. & da Silva, Silvio S., 2016. "Evaluation of oxygen availability on ethanol production from sugarcane bagasse hydrolysate in a batch bioreactor using two strains of xylose-fermenting yeast," Renewable Energy, Elsevier, vol. 87(P1), pages 703-710.

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