Bioconversion of crude glycerol feedstocks into ethanol by Pachysolen tannophilus

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Glycerol, the by-product of biodiesel production, is considered as a waste by biodiesel producers. This study demonstrated the potential of utilising the glycerol surplus through conversion to ethanol by the yeast Pachysolen tannophilus (CBS4044). This study demonstrates a robust bioprocess which was not sensitive to the batch variability in crude glycerol dependent on raw materials used for biodiesel production. The oxygen transfer rate (OTR) was a key factor for ethanol production, with lower OTR having a positive effect on ethanol production. The highest ethanol production was 17.5 g/L on 5% (v/v) crude glycerol, corresponding to 56% of the theoretical yield. A staged batch process achieved 28.1 g/L ethanol, the maximum achieved so far for conversion of glycerol to ethanol in a microbial bioprocess. The fermentation physiology has been investigated as a means to designing a competitive bioethanol production process, potentially improving economics and reducing waste from industrial biodiesel production.
Original languageEnglish
JournalBioresource Technology
Publication date2012
Volume104
Pages559-586
ISSN0960-8524
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 13

Keywords

  • Pachysolen tannophilus, Fermentation, Crude glycerol, Ethanol
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