The effect of different phosphate concentration on growth,lipid productivity and methyl palmitate methyl ester production by Nannochloropsis oculata

This study reports the effect of different phosphate concentration ranging from 0 g/l,0.1 g/l,0.2 g/l,0.5 g/l,1.0 g/l and 2.0 g/l on the growth and lipid productivity of the microalgae nannochloropsis oculata. based on the result,it shows that,the microalgae growth increased as the concentration of phosphate added into the medium increased while the percentage of lipid produced was inversely proportional to increasing concentrations of phosphate. the highest amount of lipid produced was when the microalgae were cultured under 0.1 g/l phosphate which was 5.7%. based on the standard analyzed using gas chromatography,the percentage of methyl palmitate methyl ester produced increased along with increasing concentration of phosphate until 0.5 g/l which was 11%,however further increase in phosphate concentration caused the lipid productivity to drop. © 2015 penerbit utm press. all rights reserved.