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Microalgae are considered as a potential source for biodiesel due to its easy culture and lipid content. In this work, the productivity of lipids and fatty acid profiles of the microalgae Nannochloropsis oculata grown under different light intensities were evaluated. The microalga N. oculata was cultured at 25 oC, pH 8 and light intensities of 80, 200, 400 and 650 μmol E/m 2 /s. Medium of Guillard f/2 was used to feed them every 72 h. The results indicated that increasing the light intensity promotes cell density and biomass productivity. For the light intensities of 650 and 400 mol E/m 2 /s, a cell density of 175 ± 1.83 and 148 ± 1.97 × 10 6 cell/mL and a growth rate of 0.3432 ± 0.08 and 0.3299 ± 0.02 1/d, were obtained respectively. Lipid accumulation at a light intensity of 650 μmol E/m 2 /s was twice higher than the one obtained in culture at 80 μmol E/m 2 /s, reaching 44.44 ± 0.76 %. Productivities showed the same behavior, it was increased at high light intensities, achieving 0.040 ± 0.0005 g/L/d, being eight times higher than the one obtained at a low light intensity. This behavior may be due to a high light irradiance, on which photosynthesis is increased, promoting lipid accumulation. No significant differences were found on the content of saturated and unsaturated fatty acids. Only a reduction of 2.26 % was observed in the eicosapentaenoic acid content for culture at 650 μmol E/m 2 /s, thereby increasing the content of saturated and monounsaturated fatty acids, which allows a higher quality biodiesel.

SÍNTESIS DE LÍPIDOS DE LA MICROALGA Nannochloropsis oculata PARA SU USO POTENCIAL EN LA PRODUCCIÓN DE BIODIÉSEL