Abstract

Macroalgae (seaweeds) represent an emerging resource for food and the production of commodity and specialty chemicals. In this study, a single-step microwave process was used to depolymerise a range of macroalgae native to the United Kingdom, producing a growth medium suitable for microbial fermentation. The medium contained a range of mono- and polysaccharides as well as macro- and micronutrients that could be metabolised by the oleaginous yeast Metschnikowia pulcherrima. Among twelve macroalgae species, the brown seaweeds exhibited the highest fermentation potential, especially the kelp Saccharina latissima. Applying a portfolio of ten native M. pulcherrima strains, yeast growth kinetics, as well as production of lipids and 2-phenylethanol were examined, with productivity and growth rate being strain dependent. On the 2 L scale, 6.9 g L−1 yeast biomass – a yield of 0.14 g g−1 with respect to the supplied macroalgae – containing 37.2% (w/w) lipid was achieved through utilisation of the proteins, mono- and polysaccharides from S. latissima, with no additional enzymes. In addition, the yeast degraded a range of fermentation inhibitors released upon microwave processing at high temperatures and long holding times. As macroalgae can be cultured to food grade, this system offers a novel, potentially low-cost route to edible microbial oils as well as a renewable feedstock for oleochemicals.

LanguageEnglish
Article number101411
Pages1-9
Number of pages9
JournalAlgal Research
Volume38
Early online date15 Jan 2019
DOIs
StatusPublished - 1 Mar 2019

Keywords

  • Macroalgae
  • Marine biorefinery
  • Metschnikowia pulcherrima
  • Microbial lipids
  • Microwave depolymerisation
  • Saccharina latissima

ASJC Scopus subject areas

  • Agronomy and Crop Science

Cite this

Lipid production through the single-step microwave hydrolysis of macroalgae using the oleaginous yeast Metschnikowia pulcherrima. / Abeln, Felix; Fan, Jiajun; Budarin, Vitaliy L.; Briers, Hannah; Parsons, Sophie; Allen, Michael J.; Henk, Daniel A.; Clark, James; Chuck, Christopher J.

In: Algal Research, Vol. 38, 101411, 01.03.2019, p. 1-9.

Research output: Contribution to journalArticle

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AU - Briers, Hannah

AU - Parsons, Sophie

AU - Allen, Michael J.

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