Pretreatment and fractionation of wheat straw with acetic acid to enhance enzymatic hydrolysis and ethanol fermentation

L. Wang, Z. Luo, S. Xiu, A. Shahbazi

Research output: Contribution to journalArticlepeer-review

Abstract

Acetic acid was used to pretreat and fractionate wheat straw. A 25% acetic acid solution at 160°C could remove all xylan and 26.2% of lignin in the wheat straw at a 10% solid concentration while recovering 94.2% of glucan. The glucan content of the pretreated wheat straw was 60.9% compared to 35.5% in the raw wheat straw. After the 6-day hydrolysis with a cellulase at a load of 15 FPU/g glucan, 67.6% of the glucan in the acetic acid-pretreated wheat straw was hydrolyzed into glucose, compared to 58.3, 26.0, and 24.4% for pure cellulose, wheat straw pretreated with hot water at 160°C, and raw wheat straw, respectively.

Original languageEnglish
Pages (from-to)1230-1238
Number of pages9
JournalEnergy Sources, Part A: Recovery, Utilization and Environmental Effects
Volume33
Issue number13
DOIs
StatePublished - Jan 2011

Keywords

  • acetic acid
  • ethanol
  • hydrolysis
  • pretreatment
  • wheat straw

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