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Improvement of enzymatic saccharification of Populus and switchgrass by combined pretreatment with steam and wet disk milling

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  • Kumagai, Akio
  • Wu, Long
  • Iwamoto, Shinichiro
  • Lee, Seung-Hwan
  • Endo, Takashi
  • Rodriguez, Miguel
  • Mielenz, Jonathan R.

Abstract

To reduce the recalcitrance of lignocellulosic biomass for subsequent biological processing, we pretreated energy crop feedstocks with mild steam treatment (ST; 130 and 150 °C for 60 min) and wet disk milling (WDM). We tested two phylogenetically different, but typical energy crop feedstocks: Populus trichocarpa and switchgrass (Panicum virgatum). WDM after ST facilitated the fibrillation of both types of biomass, resulting in an increase of specific surface area, improved enzymatic saccharification yield, and decrease in cellulose crystallinity. After steam treatment at 150 °C followed by 17 cycles of WDM, enzymatic hydrolysis resulted in almost complete glucan to glucose conversion in both feedstocks.

Suggested Citation

  • Kumagai, Akio & Wu, Long & Iwamoto, Shinichiro & Lee, Seung-Hwan & Endo, Takashi & Rodriguez, Miguel & Mielenz, Jonathan R., 2015. "Improvement of enzymatic saccharification of Populus and switchgrass by combined pretreatment with steam and wet disk milling," Renewable Energy, Elsevier, vol. 76(C), pages 782-789.
    • Handle: RePEc:eee:renene:v:76:y:2015:i:c:p:782-789
    DOI: 10.1016/j.renene.2014.11.070
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    1. Unknown, 2005. "Forward," 2005 Conference: Slovenia in the EU - Challenges for Agriculture, Food Science and Rural Affairs, November 10-11, 2005, Moravske Toplice, Slovenia 183804, Slovenian Association of Agricultural Economists (DAES).
    2. Ruiz, Héctor A. & Rodríguez-Jasso, Rosa M. & Fernandes, Bruno D. & Vicente, António A. & Teixeira, José A., 2013. "Hydrothermal processing, as an alternative for upgrading agriculture residues and marine biomass according to the biorefinery concept: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 21(C), pages 35-51.
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    1. Pandiyan, K. & Singh, Arjun & Singh, Surender & Saxena, Anil Kumar & Nain, Lata, 2019. "Technological interventions for utilization of crop residues and weedy biomass for second generation bio-ethanol production," Renewable Energy, Elsevier, vol. 132(C), pages 723-741.
    2. Magdalena Zborowska & Hanna Waliszewska & Boguslawa Waliszewska & Slawomir Borysiak & Jakub Brozdowski & Agata Stachowiak-Wencek, 2021. "Conversion of Carbohydrates in Lignocellulosic Biomass after Chemical Pretreatment," Energies, MDPI, vol. 15(1), pages 1-14, December.

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