| 초록 |
Due to the climate change, capturing CO2 technology is main concern. In this study microalgae using CCS(Carbon capture & store) technology and biodiesel conversion was investigated. This technology has many advantage for instance carbon neutral bioenergy generation, providing clean and harmless CO2 conversion process. Particularly, an industrial flue gas generated by combustion of liquefied natural gas (LNG) and a natural sunlight were used for the economic production of biodiesel from the microalgal biomass because LNG combusted gas contain mainly CO2 and scarcely contain NOx or Sox. Chlorella sorokiniana UTEX 2805, a heat-tolerant microalga, was cultured autotrophically in outdoor tubular photobioreactor in spring/fall and summer. Firstly assessment of the biomass production and photosynthetic activity using PAM(Pulse amplitude modulation) was performed under two temperature conditions (23℃, 36℃) in laboratory-scale. Consequently scale-up cultivation using 25L closed photobioreactor was performed in in outdoor conditions under photoautotrophic condition in spring/fall and summer. As a result, C. sorokiniana showed high tolerance to flue gas and high temperature. In summer, the cell exhibited the remarkable lipid content (＞35% of dry biomass) under N-starvation conditions to accelerate an intercellular oil accumulation. C. sorokiniana will improve microalgal biodiesel production under high temperature in outdoor conditions. |
