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High Lipid Induction in Microalgae for Biodiesel Production
Energies 2012, 5(5), 1577-1592; doi:10.3390/en5051577
Article

Seasonal Variation of Lipids and Fatty Acids of the Microalgae Nannochloropsis oculata Grown in Outdoor Large-Scale Photobioreactors

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Received: 12 March 2012; in revised form: 3 May 2012 / Accepted: 9 May 2012 / Published: 21 May 2012
(This article belongs to the Special Issue Algae Fuel)
Download PDF [1110 KB, uploaded 21 May 2012]
Abstract: While focus in oil-producing microalgae is normally on nutrient deficiency, we addressed the seasonal variations of lipid content and composition in large-scale cultivation. Lipid content, fatty acid profiles and mono- di- and triglycerides (MAGs, DAGs, and TAGs) were analyzed during May 2007–May 2009 in Nannochloropsis oculata grown outdoors in closed vertical flat panels photobioreactors. Total lipids (TL) ranged from 11% of dry weight (DW) in winter to 30% of DW in autumn. 50% of the variation in TL could be explained by light and temperature. As the highest lipid content was recorded during autumn indicating an optimal, non-linear, response to light and temperature we hypothesize that enhanced thylakoid stacking under reduced light conditions resulted in more structural lipids, concomitantly with the increase in glycerides due to released photo-oxidative stress. The relative amount of monounsaturated fatty acids (MUFA) increased during autumn. This suggested a synthesis, either of structural fatty acids as MUFA, or a relative increase of C16:1 incorporated into TAGs and DAGs. Our results emphasize the significant role of environmental conditions governing lipid content and composition in microalgae that have to be considered for correct estimation of algal oil yields in biodiesel production.
Keywords: biodiesel; microalgae; seasonal variation; Nannochloropsis oculata; large-scale; lipids; fatty acids; light; temperature biodiesel; microalgae; seasonal variation; Nannochloropsis oculata; large-scale; lipids; fatty acids; light; temperature
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Olofsson, M.; Lamela, T.; Nilsson, E.; Bergé, J.P.; del Pino, V.; Uronen, P.; Legrand, C. Seasonal Variation of Lipids and Fatty Acids of the Microalgae Nannochloropsis oculata Grown in Outdoor Large-Scale Photobioreactors. Energies 2012, 5, 1577-1592.

AMA Style

Olofsson M, Lamela T, Nilsson E, Bergé JP, del Pino V, Uronen P, Legrand C. Seasonal Variation of Lipids and Fatty Acids of the Microalgae Nannochloropsis oculata Grown in Outdoor Large-Scale Photobioreactors. Energies. 2012; 5(5):1577-1592.

Chicago/Turabian Style

Olofsson, Martin; Lamela, Teresa; Nilsson, Emmelie; Bergé, Jean Pascal; del Pino, Victória; Uronen, Pauliina; Legrand, Catherine. 2012. "Seasonal Variation of Lipids and Fatty Acids of the Microalgae Nannochloropsis oculata Grown in Outdoor Large-Scale Photobioreactors." Energies 5, no. 5: 1577-1592.


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