타가영양성 Chlorella 종의 탐색 및 최적 배양 조건

Abstract

Many phototrophic Chlorella species are useful for high value products such as CGF (Chlorella Growth Factor) and carotenoids. However, the growth of phototrophic Chlorella is often slow due to light limitation. Some phototrophic Chlorella can also grow heterotrophically with organic substrate in dark condition. Heterotrophic culture is easy to control and achieve to the fast growth and high yield of valuable products in mass culture. However, heterotrophic Chlorella species are limited. In this study, thirty-three Chlorella species were tested on the growth in heterotrophic condition and three species from freshwater were found as heterotrophic Chlorella growing well with glucose in dark condition. The cell size and dry weight of these species in heterotrophic condition were larger and heavier than those in phototrophic condition. The maximum culture biomass of these heterotrophic species attained to 133 mg/L/day.