Eicosapentaenoic Acid Extraction from Nannochloropsis gaditana Using Carbon Dioxide at Supercritical Conditions

Marine Drugs - Tập 17 Số 2 - Trang 132
Antonio Molino1, Maria Martino2, Vincenzo Larocca2, Giuseppe Di Sanzo2, Anna Spagnoletta2, Tiziana Marino3, Despina Karatza4, Angela Iovine4, Sanjeet Mehariya4, Dino Musmarra4
1ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Department of Sustainability-CR Portici, P. Enrico Fermi, 1, 80055 Portici, Italy
2ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Department of Sustainability-CR Trisaia, SS Jonica 106, km 419+500, 7026 Rotondella, Italy
3Institute on Membrane Technology, National Research Council (ITM-CNR) Via Pietro Bucci, Cubo 17C, 870 36 Rende, Italy
4Department of Engineering, University of Campania "L.Vanvitelli", Real Casa dell'Annunziata, Via Roma 29, 81031 Aversa, Italy

Tóm tắt

This research shows that carbon dioxide supercritical fluid (CO2-SF) is an emerging technology for the extraction of high interest compounds for applications in the manufacturing of pharmaceuticals, nutraceuticals, and cosmetics from microalgae. The purpose of this study is to recover fatty acids (FAs) and, more precisely, eicosapentaenoic acid (EPA) from Nannochloropsis gaditana biomass by CO2-SF extraction. In the paper, the effect of mechanical pre-treatment was evaluated with the aim of increasing FAs recovery. Extraction was performed at a pressure range of 250–550 bars and a CO2 flow rate of 7.24 and 14.48 g/min, while temperature was fixed at 50 or 65 °C. The effect of these parameters on the extraction yield was assessed at each extraction cycle, 20 min each, for a total extraction time of 100 min. Furthermore, the effect of biomass loading on EPA recovery was evaluated. The highest EPA extraction yield, i.e., 11.50 mg/g, corresponding to 27.4% EPA recovery, was obtained at 65 °C and 250 bars with a CO2 flow rate of 7.24 g/min and 1.0 g biomass loading. The increased CO2 flow rate from 7.24 to 14.48 g/min enhanced the cumulative EPA recovery at 250 bars. The purity of EPA could be improved by biomass loading of 2.01 g, even if recovery was reduced.

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Marine Drugs

Tập 17 Số 2

132

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