Abstract

• In the experiment of laboratory, the growth rates of Arthrospira platensis were tested at five different media (modified F-2 medium with CaCO3, modified F-2 medium with NaHCO3, modified Zarrouk’s medium with CaCO3, modified Zarrouk’s medium with NaHCO3, and urea and T-super with NaHCO3) at pH 8.5 to 10.5 and salinity 30‰ and 35‰. Then they were also tested with urea and T-super with NaHCO3 medium at pH 10 and salinity 30‰ for outdoor culture. The optimum growth of A. platensis (OD 0.56) was observed in modified Zarrouk’s medium with NaHCO3 at pH 10.5 in both salinities and at pH 10 in salinity 30‰ and also observed in urea and T-super with sodium bicarbonate at pH 10.5 of salinity 30‰ in the laboratory cultivation. For outdoor culture the optimum growth was OD 0.47. The minimum growth rate was occurred in modified F-2 medium with CaCO3 at pH 8.5 of salinity 30‰.