Bioethanol, biohydrogen and biogas production from wheat straw in a biorefinery concept

Prasad Laxmi-Narasimha Kaparaju, Maria Serrano, Anne Belinda Thomsen, Prawit Kongjan, Irini Angelidaki

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The production of bioethanol, biohydrogen and biogas from wheat straw was investigated within a biorefinery framework. Initially, wheat straw was hydrothermally liberated to a cellulose rich fiber fraction and a hemicellulose rich liquid fraction (hydrolysate). Enzymatic hydrolysis and subsequent fermentation of cellulose yielded 0.41 g-ethanol/g-glucose, while dark fermentation of hydrolysate produced 178.0 ml-H-2/g-sugars. The effluents from both bioethanol and biohydrogen processes were further used to produce methane with the yields of 0.324 and 0.381 m(3)/kg volatile solids (VS)added, respectively. Additionally, evaluation of six different wheat straw-to-biofuel production scenaria showed that either use of wheat straw for biogas production or multi-fuel production were the energetically most efficient processes compared to production of mono-fuel such as bioethanol when fermenting C6 sugars alone. Thus, multiple biofuels production from wheat straw can increase the efficiency for material and energy and can presumably be more economical process for biomass utilization. (C) 2008 Elsevier Ltd. All rights reserved.
Original languageEnglish
JournalBioresource Technology
Volume100
Issue number9
Pages (from-to)2562-2568
ISSN0960-8524
DOIs
Publication statusPublished - 2009

Keywords

  • Bio energy
  • Bioenergy and biomass

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