Anjos, M.; Fernandes, B.D.; Vicente, A.A.; Teixeira, J.A.; Dragone, G.
초록
Biofixation of CO<SUB>2</SUB> by microalgae has been recognized as an attractive approach to CO<SUB>2</SUB> mitigation. The main objective of this work was to maximize the rate of CO<SUB>2</SUB> fixation (R<SUB>CO'2</SUB>) by the green microalga Chlorella vulgaris P12 cultivated photoautotrophically in bubble column photobioreactors under different CO<SUB>2</SUB> concentrations (ranging from 2% to 10%) and aeration rates (ranging from 0.1 to 0.7vvm). Results showed that the maximum R<SUB>CO'2</SUB> (2.22gL<SUP>-1</SUP>d<SUP>-1</SUP>) was obtained by using 6.5% CO<SUB>2</SUB> and 0.5vvm after 7days of cultivation at 30<SUP>o</SUP>C. Although final biomass concentration and maximum biomass productivity of microalgae were affected by the different cultivation conditions, no significant differences were obtained in the biochemical composition of microalgal cells for the evaluated levels of aeration and CO<SUB>2</SUB>. The present study demonstrated that optimization of microalgal cultivation conditions can be considered a useful strategy for maximizing CO<SUB>2</SUB> bio-mitigation by C. vulgaris.