alexa CO2 biofixation and fatty acid composition of Scenedesmus obliquus and Chlorella pyrenoidosa in response to different CO2 levels.
Environmental Sciences

Environmental Sciences

Journal of Bioremediation & Biodegradation

Author(s): Tang D, Han W, Li P, Miao X, Zhong J

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Abstract In this study, Scenedesmus obliquus SJTU-3 and Chlorella pyrenoidosa SJTU-2 were cultivated with 0.03\%, 5\%, 10\%, 20\%, 30\%, 50\% CO(2). The two microalgae could grow at 50\% CO(2) (>0.69 g L(-1)) and grew well (>1.22 g L(-1)) under CO(2) concentrations ranging from 5\% to 20\%. Both of the two examined microalgae showed best growth potential at 10\% CO(2). The maximum biomass concentration and CO(2) biofixation rate were 1.84 g L(-1) and 0.288 g L(-1) d(-1) for S. obliquus SJTU-3 and 1.55 g L(-1) and 0.260 g L(-1) d(-1) for C. pyrenoidosa SJTU-2, respectively. The main fatty acid compositions of the two examined microalgae were fatty acids with C(16)-C(18) (>94\%) under different CO(2) levels. High CO(2) levels (30-50\%) were favorable for the accumulation of total lipids and polyunsaturated fatty acids. The present results suggested that the two microalgae be appropriate for mitigating CO(2) in the flue gases and biodiesel production. Copyright © 2010 Elsevier Ltd. All rights reserved. This article was published in Bioresour Technol and referenced in Journal of Bioremediation & Biodegradation

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