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Biotechnology Letters

, Volume 31, Issue 9, pp 1315–1319 | Cite as

Feasibility of ethanol production from coffee husks

  • B. M. Gouvea
  • C. Torres
  • A. S. FrancaEmail author
  • L. S. Oliveira
  • E. S. Oliveira
Original Research Paper

Abstract

The objective of this work was to evaluate the feasibility of ethanol production by fermentation of coffee husks by Saccharomyces cerevisiae. Batch fermentation studies were performed employing whole and ground coffee husks, and aqueous extract from ground coffee husks. It was observed that fermentation yield decreased with an increase in yeast concentration. The best results were obtained for the following conditions: whole coffee husks, 3 g yeast/l substrate, temperature of 30°C. Under these conditions ethanol production was 8.49 ± 0.29 g/100 g dry basis (13.6 ± 0.5 g ethanol/l), a satisfactory value in comparison to literature data for other residues such as corn stalks, barley straw and hydrolyzed wheat stillage (5–11 g ethanol/l). Such results indicate that coffee husks present excellent potential for residue-based ethanol production.

Keywords

Bioethanol Fermentation Sticky coffee husks 

Notes

Acknowledgments

The authors acknowledge financial support from the following Brazilian Government Agencies: CAPES, CNPq and FAPEMIG.

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • B. M. Gouvea
    • 1
  • C. Torres
    • 1
  • A. S. Franca
    • 1
    • 2
    Email author
  • L. S. Oliveira
    • 1
    • 2
  • E. S. Oliveira
    • 3
  1. 1.DEQ/UFMGBelo HorizonteBrazil
  2. 2.Departamento de Engenharia MecânicaUniversidade Federal de Minas GeraisBelo HorizonteBrazil
  3. 3.PPGCA/UFMGBelo HorizonteBrazil

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