Effects of Cultivation Conditions and Media Compositions on Lipid Productivity of Native Microalga Chlorella vulgaris U3-3

Abstract:

A native microalgae strain Chlorella vulgaris U3-3from Baimaxueshan Yunnan province has been isolated and identified as a potential feedstock for biodiesel production. The biomass production, lipid productivity, and fatty acid compositions of U3-3 are investigated and compared under phototrophic, heterotrophic and mixotrophic conditions with various media. U3-3 under phototrophic growth on BG11 medium shows higher cellular lipid content (44.6%) than those under heterotrophic and mixotrophic conditions. And U3-3 display its higher biomass production (5.55g/L) than those under phototrophic and heterotrophic conditions growing on optimized medium with supply 35g/L glucose under mixotrophic condition. However, Chlorella vulgaris U3-3 growing under heterotrophic condition with optimized medium of supply 35g/L glucose exhibited more than 7.26-fold and 1.05-fold increase in lipid productivity compared with that under phototrophic and mixotrophic conditions. Moreover, Chlorella vulgaris U3-3 has suitable fatty acid compositions with high saturated acid contents (28.76%) and favorable degree of unsaturation (92.86) growing under heterotrophic condition with optimized medium of supply 35g/L glucose, suggesting its potential as a biodiesel feedstock on this cultivation condition and medium composition.

• Periodical: Applied Mechanics and Materials (Volumes 291-294)
• Pages: 262-266
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.291-294.262
• Online since: February 2013
• Authors: Peng Zhao, Xu Ya Yu, Jun Jun Li, Xian Hua Tang, Zhen Rong Xie, Yue Lin Mu, Zun Xi Huang
• Keywords: Biomass, Chlorella Vulgaris, Fatty Acid Composition, Productivity

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