Effect of some factors on the cultivation of Spirulina platensis in brackish water for biomass production in Thanh Hoa province

Abstract

The result of investigating some factors affecting the cultivation of two Spirulina platensis strains collected in Thanh Hoa (TH) and Binh Thuan (BT2) provinces in the close system form with aeration showed that both the strains could grow well in brackish water with high pH values (10 for TH and 9.5 for BT2). The suitable temperature in the laboratory condition was about 30°C for both the strains. With the light:dark cycle of 12:12 h, the appropriate light intensity was 4,000 lux for those in TH and 3,000 lux for those in BT2, and the maximum biomass expressed by the optical density at wavelength of 560 nm reached 1.42 and 1.33 for the two strains in the 8th day, respectively.