Bioethanol potential of raw and hydrothermally pretreated banana bulbs biomass in simultaneous saccharification and fermentation process with Saccharomyces cerevisiae

Florent Awedem Wobiwo, Tanmay Chaturvedi, Maurice Boda, Elie Fokou, Thomas Happi Emaga, Iwona Cybulska, Magali Deleu, Patrick A. Gerin, Mette Hedegaard Thomsen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

15 Citations (Scopus)
52 Downloads (Pure)

Abstract

Residual banana bulbs (RBB) were characterized and assessed as a potential starch and cellulose-based feedstock for bioethanol production. To facilitate the enzymatic digestibility, hydrothermal pretreatment was performed on RBB prior to simultaneous saccharification and fermentation (SSF) with Saccharomyces cerevisiae. Composition of RBB was similar to traditional starch and cellulose-based feedstocks with high glucan (60 g/100 gDM) and relatively low lignin content (7 g/100 gDM). Both amylase and cellulase were needed to efficiently hydrolyze RBB. The highest ethanol yield (310 kg EtOH/ton_DM_RBB, 93% of theoretical production based on total available glucose) was obtained with non-pretreated RBB. SSF can be carried out at lower RBB concentrations. Hydrothermal pretreatment affected negatively the bioethanol potential due to the loss of fermentable carbohydrates. In a case study of an African leading producer of bananas and plantains (Cameroon), the energy derived from bioethanol was 80 GWh ethanol/year and corresponded to 1.6% of the annual transportation requirement. This study shows that RBB is a promising alternative feedstock for bioethanol production.
Original languageEnglish
JournalBiomass Conversion and Biorefinery
Volume9
Issue number3
Pages (from-to)553-563
Number of pages11
ISSN2190-6815
DOIs
Publication statusPublished - Sep 2019

Keywords

  • Banana bulbs
  • Bioethanol
  • Biorefinery
  • Fermentation
  • Hydrothermal pretreatment

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