Cryptococcus terricola is a promising oleaginous yeast for biodiesel production from starch through consolidated bioprocessing

Sci Rep. 2014 Apr 24:4:4776. doi: 10.1038/srep04776.

Abstract

Starch is considered a potential feedstock for biofuel production, particularly in light of the large-scale landfilling of food waste and other starchy materials worldwide. Lipid accumulation by oleaginous yeast is a promising method for biodiesel production from starch. However, most oleaginous yeasts are grown on monosaccharides or oligosaccharides because they cannot directly utilize starch. We therefore investigated the starch-assimilation ability of 1,200 yeasts. We found that Cryptococcus terricola could be used for fuel production through consolidated bioprocessing. C. terricola JCM 24523 exhibited the highest lipid content of 61.96% on medium with 5% starch at 10 days. Fatty acid methyl ester analysis showed that this strain produced high proportions of C16:0 and C18 fatty acids when grown on starch, which are ideal for use in biodiesel. Considering the yield and cost, lipids derived from starch using C. terricola would be a promising alternative source for biodiesel production.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biofuels*
  • Cryptococcus / metabolism*
  • Culture Media
  • Environmental Microbiology
  • Fatty Acids / metabolism
  • Industrial Microbiology
  • Kinetics
  • Lipid Metabolism
  • Starch / metabolism*

Substances

  • Biofuels
  • Culture Media
  • Fatty Acids
  • Starch