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Simultaneous saccharification and co-fermentation of corn stover pretreated by H2O2 oxidative degradation for ethanol production

Author

Listed:
  • Liu, Lu
  • Zhang, Zhicai
  • Wang, Jia
  • Fan, Yajuan
  • Shi, Wenjing
  • Liu, Xiaocui
  • Shun, Quanshan

Abstract

The simultaneous saccharification and co-fermentation of Saccharomyces cerevisiae and Candida tropicalis for ethanol production using H2O2-pretreated corn stover (CS) were performed in 250-mL or 500-mL Erlenmeyer flasks at various S. cerevisiae-C. tropicalis ratios (4:1, 3:1, 2:1, 1:1, 1:2, 1:3 and 1:4), fermentation temperatures (32 °C, 35 °C and 38 °C), inoculation ratios (8%, 12% and 16%), initial pH values (4.5, 5 and 5.5) and fermentation times (96 h, 120 h and 144 h). The optimum S. cerevisiae-C. tropicalis ratio derived from mono-factor design test was 3:1. According to orthogonal design experiment results, the optimum fermentation temperature, inoculation ratio, initial pH and fermentation time with a dry solid substrate content of 25% were 32 °C 12%, 5.0 and 144 h, respectively, and the maximum ethanol concentration was 10.924 g/100 mL. The cell growth, ethanol production and total substrate consumption in the process of simultaneous saccharification and co-fermentation conformed to logistical model, Luedeking-Piret model and general substrate consumption law of mono-strain fermentation, respectively. Collectively, S. cerevisiae and C. tropicalis simultaneously produced ethanol from xylose and glucose without interference, respectively.

Suggested Citation

  • Liu, Lu & Zhang, Zhicai & Wang, Jia & Fan, Yajuan & Shi, Wenjing & Liu, Xiaocui & Shun, Quanshan, 2019. "Simultaneous saccharification and co-fermentation of corn stover pretreated by H2O2 oxidative degradation for ethanol production," Energy, Elsevier, vol. 168(C), pages 946-952.
    • Handle: RePEc:eee:energy:v:168:y:2019:i:c:p:946-952
    DOI: 10.1016/j.energy.2018.11.132
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    References listed on IDEAS

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    1. Fan, Yajuan & Zhang, Zhicai & Wang, Feng & Li, Jinhua & Hu, Kunya & Du, Zhuorong, 2019. "Lignin degradation in corn stover catalyzed by lignin peroxidase from Aspergillus oryzae broth: Effects of conditions on the kinetics," Renewable Energy, Elsevier, vol. 130(C), pages 32-40.
    2. Zhao, Chen & Zou, Zongsheng & Li, Jisheng & Jia, Honglei & Liesche, Johannes & Fang, Hao & Chen, Shaolin, 2017. "A novel and efficient bioprocess from steam exploded corn stover to ethanol in the context of on-site cellulase production," Energy, Elsevier, vol. 123(C), pages 499-510.
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    Citations

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    Cited by:

    1. Chong, Ting Yen & Cheah, Siang Aun & Ong, Chin Tye & Wong, Lee Yi & Goh, Chern Rui & Tan, Inn Shi & Foo, Henry Chee Yew & Lam, Man Kee & Lim, Steven, 2020. "Techno-economic evaluation of third-generation bioethanol production utilizing the macroalgae waste: A case study in Malaysia," Energy, Elsevier, vol. 210(C).
    2. Zhang, Zhicai & Zheng, Huihua & Qian, Jingya, 2023. "Pretreatment with a combination of steam explosion and NaOH increases butanol production of enzymatically hydrolyzed corn stover," Renewable Energy, Elsevier, vol. 203(C), pages 301-311.

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