| 초록 |
CO2 enriched air bubbling is commonly used for microalgae cultivation. However, aeration with CO2 may not be suitable for mass cultivation in the ocean due to high transportation cost and low carbon utilization efficiency. NaHCO3 could also be used as a carbon source of algal culture. Using NaHCO3 for cultivation of Tetraselmis sp. MBEyh04Gc was investigated. The microalgae were cultured in closed marine photobioreactors floated in the Young-Heung Island, Incheon, Korea. Initially, 4.0 g/L NaHCO3 was added to the cultures, and after 11 days of cultivation, when the cultures entered stationary phase, 0.0, 2.0 and 4.0 g/L NaHCO3 were supplemented additionally. The biomass productivities were 0.19, 0.28 and 0.38 g/L/day in 0.0, 2.0 and 4.0 g/L NaHCO3 supplemented groups, respectively. Maximum biomass productivity was attained by supplying 4.0 g/L NaHCO3. The results indicate that NaHCO3 could be used as a carbon source alternative to CO2 gas in ocean cultivation. |
