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Article

Operation Regimes: A Comparison Based on Nannochloropsis oceanica Biomass and Lipid Productivity

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ALLMICROALGAE Natural Products S.A., R&D Department, Rua 25 de Abril s/n, 2445-413 Pataias, Portugal
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iBB—Institute for Bioengineering and Biosciences, IST, Universidade de Lisboa, Av. Rovisco Pais, nº1, 1049-001 Lisbon, Portugal
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GreenCoLab—Associação Oceano Verde, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
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CCMAR—Centre of Marine Sciences, University of Algarve, Gambelas, 8005-139 Faro, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: José Carlos Magalhães Pires
Energies 2021, 14(6), 1542; https://doi.org/10.3390/en14061542
Received: 20 February 2021 / Revised: 6 March 2021 / Accepted: 8 March 2021 / Published: 11 March 2021
(This article belongs to the Special Issue Microalgae Cultures: Environmental Tool and Bioenergy Source)
Microalgae are currently considered to be a promising feedstock for biodiesel production. However, significant research efforts are crucial to improve the current biomass and lipid productivities under real outdoor production conditions. In this context, batch, continuous and semi-continuous operation regimes were compared during the Spring/Summer seasons in 2.6 m3 tubular photobioreactors to select the most suitable one for the production of the oleaginous microalga Nannochloropsis oceanica. Results obtained revealed that N. oceanica grown using the semi-continuous and continuous operation regimes enabled a 1.5-fold increase in biomass volumetric productivity compared to that cultivated in batch. The lipid productivity was 1.7-fold higher under semi-continuous cultivation than that under a batch operation regime. On the other hand, the semi-continuous and continuous operation regimes spent nearly the double amount of water compared to that of the batch regime. Interestingly, the biochemical profile of produced biomass using the different operation regimes was not affected regarding the contents of proteins, lipids and fatty acids. Overall, these results show that the semi-continuous operation regime is more suitable for the outdoor production of N. oceanica, significantly improving the biomass and lipid productivities at large-scale, which is a crucial factor for biodiesel production. View Full-Text
Keywords: tubular photobioreactor; pilot-scale; operation regimes; outdoor cultivation; Nannochloropsis oceanica tubular photobioreactor; pilot-scale; operation regimes; outdoor cultivation; Nannochloropsis oceanica
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MDPI and ACS Style

Guerra, I.; Pereira, H.; Costa, M.; Silva, J.T.; Santos, T.; Varela, J.; Mateus, M.; Silva, J. Operation Regimes: A Comparison Based on Nannochloropsis oceanica Biomass and Lipid Productivity. Energies 2021, 14, 1542. https://doi.org/10.3390/en14061542

AMA Style

Guerra I, Pereira H, Costa M, Silva JT, Santos T, Varela J, Mateus M, Silva J. Operation Regimes: A Comparison Based on Nannochloropsis oceanica Biomass and Lipid Productivity. Energies. 2021; 14(6):1542. https://doi.org/10.3390/en14061542

Chicago/Turabian Style

Guerra, Inês, Hugo Pereira, Margarida Costa, Joana T. Silva, Tamára Santos, João Varela, Marília Mateus, and Joana Silva. 2021. "Operation Regimes: A Comparison Based on Nannochloropsis oceanica Biomass and Lipid Productivity" Energies 14, no. 6: 1542. https://doi.org/10.3390/en14061542

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