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An oil-producing microalga SP-01 belonging to the genus Scenedesmus was shown to be able to grow on a media containing 5 to 30 g L-1 NaCl. Under mixotrophic condition, the maximum cell dry weight of 3.1 g L -1 and specific growth rate of 0.034 h -1 were obtained at 0.5 g L -1 NaNO 3 and 6 g L -1 acetate. The effects of salinity on the biomass, lipid, and carotenoid productions of the alga SP-01 in mixotrophic mode were investigated. The biomass productivity increased with increasing NaNO3 concentrations, and addition of NaCl resulted in a higher biomass while NaNO 3 was present. The maximum lipid content was obtained while no NaNO 3 and NaCl was added, and the lipid content decreased with increasing NaNO 3 concentrations or addition of NaCl. The maximum lipid productivities of 67.44 to 68.44 mg L-1day -1 were obtained while NaNO3 and NaCl were not added or while 20 g L -1 NaCl and 0.13 g L -1 NaNO 3 were added. The algal lipid was mainly composed of C16 and C18 fatty acids accounting for more than 90% of total fatty acids. Furthermore, lutein and astaxanthin were the main carotenoids. Key words : Halotolerant, microalga, Scenedesmus sp., mixotrophic culture, lipid, carotenoid.

Characterization of a newly isolated green microalga Scenedesmus sp. as a potential source of biodiesel