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Applied Biochemistry and Biotechnology

, Volume 124, Issue 1–3, pp 1133–1141 | Cite as

Pretreatment of switchgrass by ammonia fiber explosion (AFEX)

  • Hasan Alizadeh
  • Farzaneh Teymouri
  • Thomas I. Gilbert
  • Bruce E. DaleEmail author
Article

Abstract

The effects of ammonia fiber explosion (AFEX) pretreatment of switch grass using its major process variables are reported. The optimal pretreatment conditions for switchgrass were found to be near 100°C reactor temperature, and ammonia loading of 1:1 kg of ammonia: kg of dry matter with 80% moisture content (dry weight basis [dwb]) at 5 min residence time. Hydrolysis results of AFEX-treated and untreated samples showed 93% vs 16% glucan conversion, respectively. The ethanol yield of optimized AFEX-treated switchgrass was measured to be about 0.2 g ethanol/g dry biomass, which is 2.5 times more than that of the untreated sample.

Index Entries

Ammonia fiber explosion (AFEX) switchgrass enzymatic hydrolysis simultaneous saccharification and fermentation 

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Copyright information

© Humana Press Inc. 2005

Authors and Affiliations

  • Hasan Alizadeh
    • 1
  • Farzaneh Teymouri
    • 1
  • Thomas I. Gilbert
    • 1
  • Bruce E. Dale
    • 1
    Email author
  1. 1.Department of Chemical Engineering and Materials ScienceMichigan State UniversityEast Lansing

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