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Ethanol Production from Corn Fiber Separated after Liquefaction in the Dry Grind Process

Author

Listed:
  • Chinmay V. Kurambhatti

    (Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA)

  • Deepak Kumar

    (Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA)

  • Kent D. Rausch

    (Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA)

  • Mike E. Tumbleson

    (Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA)

  • Vijay Singh

    (Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
    DOE Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA)

Abstract

Conversion of corn fiber to ethanol in the dry grind process can increase ethanol yields, improve coproduct quality and contribute to process sustainability. This work investigates the use of two physio-chemical pretreatments on corn fiber and effect of cellulase enzyme dosage to improve ethanol yields. Fiber separated after liquefaction of corn was pretreated using (I) hot water pretreatment (160 °C for 5, 10 or 20 min) and (II) wet disk milling and converted to ethanol. The conversion efficiencies of hot water pretreated fiber were higher than untreated fiber, with highest increase in conversion (10.4%) achieved for 5 min residence time at 160 °C. Disk milling was not effective in increasing conversion compared to other treatments. Hydrolysis and fermentation of untreated fiber with excess cellulase enzymes resulted in 33.3% higher conversion compared to untreated fiber.

Suggested Citation

  • Chinmay V. Kurambhatti & Deepak Kumar & Kent D. Rausch & Mike E. Tumbleson & Vijay Singh, 2018. "Ethanol Production from Corn Fiber Separated after Liquefaction in the Dry Grind Process," Energies, MDPI, vol. 11(11), pages 1-12, October.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:2921-:d:178520
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    References listed on IDEAS

    as
    1. Jipeng Yan & Shijie Liu, 2015. "Hot Water Pretreatment of Boreal Aspen Woodchips in a Pilot Scale Digester," Energies, MDPI, vol. 8(2), pages 1-15, February.
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    Cited by:

    1. Jozef Martinka & Peter Rantuch & Igor Wachter, 2019. "Impact of Water Content on Energy Potential and Combustion Characteristics of Methanol and Ethanol Fuels," Energies, MDPI, vol. 12(18), pages 1-16, September.
    2. 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.
    3. Sarocha Pradyawong & Ankita Juneja & Muhammad Bilal Sadiq & Athapol Noomhorm & Vijay Singh, 2018. "Comparison of Cassava Starch with Corn as a Feedstock for Bioethanol Production," Energies, MDPI, vol. 11(12), pages 1-11, December.

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