Nutritional and bioactive oils from salmon (Salmo salar) side streams obtained by Soxhlet and optimized microwave-assisted extraction

The efficiency of the microwave-assisted extraction (MAE) technique on recovering nutritional and bioactive oils from salmon (Salmo salar) side streams was evaluated and compared to Soxhlet extraction. The response surface methodology (RSM) coupled with a central composite rotatable design was used...

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Bibliographic Details
Published in:Food Chemistry
Main Authors: Fuente, Beatriz de la, Pinela, José, Mandim, Filipa, Heleno, Sandrina A., Ferreira, Isabel C.F.R., Barba, Francisco Jose, Berrada, Houda, Caleja, Cristina, Barros, Lillian
Format: Article in Journal/Newspaper
Language:English
Published: 2022
Subjects:
Salmon side streams
Fish oil
Fatty acids
Microwave-assisted extraction (MAE)
Bioactive properties
Cellular assays
Barros
Salmo salar
Online Access:http://hdl.handle.net/10198/25442
https://doi.org/10.1016/j.foodchem.2022.132778
Description
Summary:The efficiency of the microwave-assisted extraction (MAE) technique on recovering nutritional and bioactive oils from salmon (Salmo salar) side streams was evaluated and compared to Soxhlet extraction. The response surface methodology (RSM) coupled with a central composite rotatable design was used to optimize time, microwave power, and solid/liquid ratio of the MAE process in terms of oil yield. The optimal MAE conditions were 14.6 min, 291.9 W, 80.1 g/L for backbones, 10.8 min, 50.0 W, 80.0 g/L for heads, and 14.3 min, 960.6 W, 99.5 g/L for viscera, which resulted in a recovery of 69% of the total lipid content for backbones and heads and 92% for viscera. The oils obtained under optimal MAE conditions showed a healthy lipid profile as well as cytotoxic, antioxidant, anti-inflammatory, or antimicrobial properties. These results highlight that oils from underutilized salmon by-products could be exploited by different industrial sectors under the circular economy approach. The authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for financial support through national funds FCT/MCTES to CIMO (UIDB/00690/2020). To FCT for the contracts of J. Pinela (CEECIND/01011/2018) and L. Barros (through the institutional scientific employment program-contract). This work was funded by the European Regional Development Fund (ERDF) through the Competitiveness and Internationalization Operational Program (POCI), within the scope of project HealthyPETFOOD (POCI-01-0247-FEDER-047073), and by BBI-JU through the H2020 Project AQUABIOPRO-FIT “Aquaculture and agriculture biomass side streams proteins and bioactives for feed, fitness, and health promoting nutritional supplements” (Grant number 790956). info:eu-repo/semantics/publishedVersion

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