Effect of phosphorus and silicon limitation on lipid production of Phaeodactylum tricornutum as a potential source of biodiesel

Oğuzhan ALACA, Leyla USLU

Abstract

This study was carried out to determine the effects of different ratios of phosphorus (P) and Silicon (Si) on the growth, lipid, protein and fatty acid production of Phaeodactylum tricornutum and to source renewable, non-toxic biofuels. While the highest lipid was determined as 34.9% in the group with 50% P restriction, it was observed that 20% and 50% Si restriction did not have a positive effect on lipid production. In P. tricornutum biomass, total saturated fatty acids (ΣSFA) were generally low and total unsaturated fatty acids (ΣUFA) were quite high in all groups. The highest polyunsaturated fatty acid (PUFA) values were determined in the 50%P&50%Si and 50%P&20Si restriction groups. Although EPA, one of the most important fatty acids in the PUFA group, was observed at high values in all groups, the highest value was found to be 12.28% in the 50%P&50%Si restriction group.

Keywords

fatty acids, P limitation, Phaeodactylum tricornotum, protein, Si limitation, total lipid.

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References

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