Ethanol Production From Pretreated Olive Tree Wood and Sunflower Stalks by an SSF Process

  • Encarnación Ruiz
  • Cristóbal Cara
  • Mercedes Ballesteros
  • Paloma Manzanares
  • Ignacio Ballesteros
  • Eulogio Castro
Part of the ABAB Symposium book series (ABAB)

Abstract

Olive tree wood and sunflower stalks are agricultural residues largely available at low cost in Mediterranean countries. As renewable lignocellulosic materials, their bioconversion may allow both obtaining a value-added product, for fuel ethanol, and facilitating their elimination. In this work, the ethanol production from olive tree wood and sunflower stalks by a simultaneous saccharification and fermentation (SSF) process is studied. As a pretreatment, steam explosion at different temperatures was applied. The water insoluble fractions of steam-pretreated sunflower stalks and steamed, delignified olive tree wood were used as substrates at 10% w/v concentration for an SSF process by a cellulolytic commercial complex and Saccharomyces cerevisiae. After 72-h fermentation, ethanol concentrations up to 30 g/L were obtained in delignified steam-pretreated olive tree wood at 230°C and 5 min. Sunflower stalks pretretated at 220°C and 5 min gave maximum ethanol concentrations of 21 g/L in SSF experiments.

Index Entries

Ethanol olive tree wood sunflower stalks SSF pretreatment 

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Copyright information

© Humana Press Inc. 2006

Authors and Affiliations

  • Encarnación Ruiz
    • 1
  • Cristóbal Cara
    • 1
  • Mercedes Ballesteros
    • 2
  • Paloma Manzanares
    • 2
  • Ignacio Ballesteros
    • 2
  • Eulogio Castro
    • 1
  1. 1.Department of Chemical, Environmental and Materials EngineeringUniversity of JaénJaénSpain
  2. 2.DER-CIEMATMadridSpain

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