Fig. 2

The growth curves and biomass productivities of Dunaliella tertiolecta cultured outdoors under different sodium bicarbonate concentrations in ATCC-1174 DA medium using rotating floating photobioreactor. a The changes in cell count per mL culture of D. tertiolecta under 0.02 mol L⁻¹ NaHCO₃ (filled red circle) and 0.10 mol L⁻¹ NaHCO₃ (filled blue triangle) as compared to the control, 0.00 mol L⁻¹ NaHCO₃ (filled black cube). b The changes in cell count per mL culture of D. tertiolecta in RFP without rotation/static RFP under cultivation conditions mentioned above. c The changes in OD₆₈₅ values of D. tertiolecta culture under cultivation conditions mentioned above. d The changes in dry weight per liter of D. tertiolecta culture under cultivation conditions mentioned above. e The changes in biomass productivities (g m⁻² day⁻¹) of D. tertiolecta culture under 0.02 mol L⁻¹ NaHCO₃ (red bar) and 0.10 mol L⁻¹ NaHCO₃ (blue bar) as compared to the control, 0.00 mol L⁻¹ NaHCO₃ (black bar). The negative values of biomass productivities calculated were all shown as 0 g m⁻² day⁻¹. Data were expressed as mean ± standard deviation of three independent experiments (n = 3)