Liquid by-products from fish canning industry as sustainable sources of ω3 lipids. (1st August 2018)

• Record Type: Journal Article
• Authors: Monteiro, Ana; Paquincha, Diogo; Martins, Florinda; Queirós, Rui P.; Saraiva, Jorge A.; Švarc-Gajić, Jaroslava; Nastić, Nataša; Delerue-Matos, Cristina; Carvalho, Ana P.
• Is Part Of: Journal of environmental management. Volume 219(2018)
• Page Start: 9
• Page End: 17
• Publication Date: 2018-08-01
• Subjects: Lipid extraction -- Omega-3 polyunsaturated fatty acids -- Waste valorization -- Liquid by-products -- Functional ingredients -- LCA; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2018.04.102
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: Fish canning industry generates large amounts of liquid wastes, which are discarded, after proper treatment to remove the organic load. However, alternative treatment processes may also be designed in order to target the recovery of valuable compounds; with this procedure, these wastewaters are converted into liquid by-products, becoming an additional source of revenue for the company. This study evaluated green and economically sustainable methodologies for the extraction of ω3 lipids from fish canning liquid by-products. Lipids were extracted by processes combining physical and chemical parameters (conventional and pressurized extraction processes), as well as chemical and biological parameters. Furthermore, LCA was applied to evaluate the environmental performance and costs indicators for each process. Results indicated that extraction with high hydrostatic pressure provides the highest amounts of ω3 polyunsaturated fatty acids (3331, 5 mg L −1 effluent), apart from presenting the lowest environmental impact and costs. The studied procedures allow to obtain alternative, sustainable and traceable sources of ω3 lipids for further applications in food, pharmaceutical and cosmetic industries. Additionally, such approach contributes towards the organic depuration of canning liquid effluents, therefore reducing the overall waste treatment costs. Graphical abstract: Highlights: Wastewaters from fish canning industry are discarded after treatment. Extraction of ω3 lipids from those effluents was studied, using various processes. LCA was applied to evaluate environmental performance and costs for each process. Extraction with HHP has the lowest environmental impact and costs in lipid recovery. Studied procedures envisage the rational utilization of new sources of ω3 PUFA.