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Biotechnology and Bioprocess Engineering

, Volume 19, Issue 6, pp 943–950 | Cite as

Napier grass (Pennisetum purpureum Schumach) as raw material for bioethanol production: Pretreatment, saccharification, and fermentation

  • Masahide YasudaEmail author
  • Yasuyuki Ishii
  • Kazuyoshi Ohta
Review Paper

Abstract

Recently Napier grass (Pennisetum purpureum Schumach) has been recognized to meet the requirement of lignocellulosic bioethanol production, because it has low lignin-content and a relatively high herbage mass per year and per area. Therefore, pretreatment, saccharification, and fermentation processes for ethanol production from Napier grass have been extensively studied. As pretreatment method, acid, alkali, PBHW (pressurized batch hot water), and LMAA (low-moisture anhydrous ammonia) pretreatments were reviewed. As saccharification and fermentation process, saccharification followed by co-fermentation of hexose and pentose, simultaneous saccharification and fermentation (SSF) followed by pentose fermentation, simultaneous saccharification and co-fermentation (SSCF) process were proposed. The SSCF was most advantageous process since the SSCF can prevent contamination risks of other microorganism and can construct simple processing procedure. An example of ethanol production from Napier grass was a combination process of LMAA-pretreatment with SSCF which was performed for of LMAA-treated Napier grass at 36℃ for 96 h using cellulase, xylanase, Saccharomyces cerevisiae, and Escherichia coli KO11. The ethanol yield reached 74.1%. Thus, Napier grass was thought to be a promising biomass for ethanol production.

Keywords

LMAA SSF SSCF cellulase xylanase Saccharomyces cerevisiae Escherichia coli KO11 

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Copyright information

© The Korean Society for Biotechnology and Bioengineering and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Masahide Yasuda
    • 1
    Email author
  • Yasuyuki Ishii
    • 2
  • Kazuyoshi Ohta
    • 3
  1. 1.Department of Applied Chemistry, Faculty of EngineeringUniversity of Miyazaki, Gakuen-Kibanadai NishiMiyazakiJapan
  2. 2.Department of Animal and Grassland Sciences, Faculty of AgricultureUniversity of Miyazaki, Gakuen Kibanadai NishiMiyazakiJapan
  3. 3.Department of Biochemistry and Applied Biosciences, Faculty of AgricultureUniversity of Miyazaki, Gakuen-Kibanadai NishiMiyazakiJapan

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