Title |
Enhanced Production of Biomass and Lipids by Supplying CO2 in Marine Microalga Dunaliella sp. |
Author |
Hancheol Jeon1, Yew Lee1, Kwang Suk Chang1, Choul-Gyun Lee2, and EonSeon Jin1* |
Address |
1Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul 133-791, Republic of Korea, 22Institute of Industrial Biotechnology, Department of Biological Engineering, Inha University, Incheon 402-751, Republic of Korea |
Bibliography |
Journal of Microbiology, 51(6),773–776, 2013,
|
DOI |
10.1007/s12275-013-3256-9
|
Key Words |
carbon dioxide, photobioreactor, CO2 sequestration, Dunaliella, biodiesel |
Abstract |
Non-food-based biofuel feedstocks are in high demand
worldwide. Among the various feedstocks, microalgae are
the most promising feedstock for mitigating atmospheric
CO2 and producing biodiesel. In this study, various concentrations
of CO2, from 0.03 to 12%, were used to investigate
their effect on the cell growth, biomass and lipid production
and fatty acid composition of Dunaliella sp. in a
closed photobioreactor. The results showed that the highest
biomass and total lipids, 521 mg/L/d and 40 mg/L/d, respectively,
were produced with 5% CO2 aeration during the
logarithmic growth phase. The oleic acid (18:1n9c) and elaidic
acid (18:1n9t) contents were increased approximately
two fold. The physiological responses of Dunaliella sp. at
10% CO2 were similar to those at 5% CO2. Therefore, the
present results suggest that 5–10% is a suitable CO2 concentration
range for Dunaliella sp. growth to mitigate atmospheric
CO2 and increase biofuel production. |