Microalgae have a great potential as a source of several chemical compounds. The fatty acids have shown therapeutic effects and used to produce biodiesel. The aim of this work was to verify the lipid contents and the fatty acids profile of the microalga Spirulina sp., Scenedesmus obliquus, Chlorella kessleri and Chlorella vulgaris cultived in different carbon dioxide and sodium bicarbonate concentrations. The microalgae Chlorella kessleri cultived with 12% CO2 showed the highest lipid content in the dry biomass (9.7% p/p). The maximum unsaturated fatty acids concentration was 72.0% (p/p) to C. vulgaris in the culture with 12% CO2. The highest saturated fatty acids value was 81.6% (p/p) when microalga Spirulina sp. was cultived with 18% CO2 and 16.8 g.L-1 sodium bicarbonate.
Chlorella; fatty acids; lipids; Scenedesmus; Spirulina
