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Fermentable sugars recovery from grape stalks for bioethanol production

Author

Listed:
  • Egüés, I.
  • Serrano, L.
  • Amendola, D.
  • De Faveri, D.M.
  • Spigno, G.
  • Labidi, J.

Abstract

Three different processes were investigated for the recovery of fermentable sugars from grape stalks: autohydrolysis at 121 °C before and after a pre-washing step and acid hydrolysis (2% H2SO4w/w) after a pre-washing step. Moreover, optimal conditions of a charcoal-based purification process were determined by experimental design. All hydrolysates, with their corresponding synthetic liquors were used as fermentation substrates for the production of metabolites by the yeast: Debaryomyces nepalensis NCYC 1026. The main fermentation product was ethanol, where a maximum production of 20.84 g/l, a conversion yield of 0.35 g ethanol/g monomeric sugars and a productivity of 0.453 g/l h were obtained from non-purified autohydrolysate liquor. In all cases, ethanol production and cell growth were better in non-purified liquors than in synthetic liquors. These results could be influenced by the presence of other sugars in the hydrolysates, with higher concentration in non-purified ones.

Suggested Citation

  • Egüés, I. & Serrano, L. & Amendola, D. & De Faveri, D.M. & Spigno, G. & Labidi, J., 2013. "Fermentable sugars recovery from grape stalks for bioethanol production," Renewable Energy, Elsevier, vol. 60(C), pages 553-558.
    • Handle: RePEc:eee:renene:v:60:y:2013:i:c:p:553-558
    DOI: 10.1016/j.renene.2013.06.006
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    Cited by:

    1. Battista, Federico & Mancini, Giuseppe & Ruggeri, Bernardo & Fino, Debora, 2016. "Selection of the best pretreatment for hydrogen and bioethanol production from olive oil waste products," Renewable Energy, Elsevier, vol. 88(C), pages 401-407.
    2. Dávila, Izaskun & Gullón, Beatriz & Labidi, Jalel & Gullón, Patricia, 2019. "Multiproduct biorefinery from vine shoots: Bio-ethanol and lignin production," Renewable Energy, Elsevier, vol. 142(C), pages 612-623.

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