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.