earticle

영어

Microalgae can fix carbon dioxide from combustion of fossil fuel and also convert energy intensive chemicals. Objective of this study is to evaluate differences between in/out door culture condition, kinetics of the cell growth and CO2 fixation rate using autotrophic cultivation of Chlorella vulgaris in 2 L bubble column photobioreactors. It was carried out with two types of CO2 gases were investigated at indoor and outdoor: pure CO2 gas from a commercially-available source and a flue gas from direct combustion of kerosene. In order to investigate combined effect of natural light (NL, solar radiation) and artificial light (AL, fluorescent lamp), BC-PBR set up at outdoor was supplied 100 mol·m-2·s-1 using 55 W fluorescent lamps at night time. A combination of AL (at night time) and NL (at day time) was successfully provided for attaining certain level of cell growth and concentration at outdoor cultivation as much as indoor`s one. Feasible test of flue gas from kerosene combustion as gas from fossil fuel combustion showed C. vulgaris could grow well and successfully fixed the CO2 gas contained in flue gas. Cultivation under continuous light regime nomatter what natural or artificial light sources used can be more proper way for enhanced cell growth rate and productivity.