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Biomass and oil content of microalgae under mixotrophic conditions

Choi, Hee-Jeong;Lee, Seung-Mok

  • Received : 2014.07.15
  • Accepted : 2014.12.27
  • Published : 2015.03.31

Abstract

The growth of the algae strains Neochloris oleabundans, Botryococcus Braunii and Dunaliella sp. under mixotrophic conditions in the presence of different concentrations of crude glycerol was evaluated with the objective of increasing the biomass growth and algal oil content. A high biomass concentration was characteristic of these strains when grown on crude glycerol compared to autotrophic growth, and 5 g/L glycerol yielded the highest biomass concentration for these strains. Mixotrophic conditions improved both the growth of the microalgae and the accumulation of triacylglycerols (TAGs). The maximum amount of TAGs in the algal strains was obtained in the 5 g/L glycerol growth medium. The fatty acid profiles of the oil for the cultures met the necessary requirements and are promising resources for biofuel production.

Keywords

Biomass;Glycerol;Microalgae;Mixotrophic;Oil content

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Acknowledgement

Supported by : National Research Foundation of Korea (NRF)