미세조류 Nannochloris oculata 의 성장과 지질 생산에 미치는 질소 농도와 광량의 영향

Abstract

Increasing demands on fossil fuel have led to the unprecedented attraction to microalgal biofuel as an alternative energy. In this study, we investigated growth and lipid productions of microalga Nannochloris oculata under various carbon dioxide or nitrogen source concentrations and irradiance conditions. Biomass production of N. oculata was highest under 2% CO2 with 0.3 flow rate (vvm). In addition, biomass productivities were proportional to the concentration of nitrogen source, whereas lipid biosynthesis was suppressed under higher nitrogen concentration (up to 50 mg/L). High irradiation (160~180 μmol/m2·s) enhanced growth rate and lipid production of N. oculata.