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KMID : 0545120140240050683
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Journal of Microbiology and Biotechnology
2014 Volume.24 No. 5 p.683 ~ p.689
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Lipid Production by a CO2-Tolerant Green Microalga, Chlorella sp. MRA-1
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Yanlin Zheng
Cheng Yuan
Junhan Liu
Guangrong Hu
Fuli Li
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Abstract
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Since CO2 concentrations in industrial flue gases are usually 10%?20%, one of the prerequisites for efficient CO2 removal by algae is the level of tolerance of microalgal species to exposure to high concentrations of CO2. A newly isolated microalgal strain, Chlorella sp. MRA-1, could retain growth with high concentrations of CO2 up to 15%. The highest lipid productivity for Chlorella sp. MRA-1 was 0.118 g/l/day with a 5% CO2 concentration. Octadecenoic acid and hexadecanoic acid, the main components of biodiesel, accounted for 70% of the total fatty acids. A lipid content of 52% of dry cell weight was achieved with limited amounts of nitrogen. Chlorella sp. MRA-1 seems to be an ideal candidate for biodiesel production when cultured with high concentrations of CO2.
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KEYWORD
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Biodiesel, CO2 tolerance, Fatty acid composition, Lipid production, Microalgae
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