| 초록 |
Microalgae have aroused new interest as a sustainable biofuel feedstock due to their high CO2 conversion efficiency. However, the main limitation of microalgae-based biofuel production is low productivity. In this study, CO2 in flue gas emitted from the coal-fired power plants was fixed by culturing large-scale microalgae using only sunlight as an energy source. To minimize the cost and energy required for flue gas supply and to efficiently utilize the microalgal biomass, a polycarbonate (PC) greenhouse and polymeric photobioreactors were installed near the power plant stack. Four different microalgal strains were subjected to semi-continuous culturing for 1 month. The CO2 fixation rate, which was calculated based on the carbon content of the biomass, was 0.309 g CO2 L-1 day-1. Therefore, large amounts of CO2 can be reduced by using a large-scale microalgal cultivation system, thereby increasing the biological CO2 conversion efficiency and maximizing the use of microalgal biomass. |
