From waste to value-added products: A review of opportunities for fish waste valorization |
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Authors: | Cesar Vinicus Toniciolli Rigueto Rafaela de Oliveira Karolynne Sousa Gomes Ingridy Alessandretti Mateus Torres Nazari Marieli Rosseto Daniela Dal Castel Krein Raquel Aparecida Loss Aline Dettmer |
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Institution: | 1. Rural Science Center (CCR), Postgraduate Program in Food Science and Technology (PPGCTA), Federal University of Santa Maria (UFSM), Santa Maria, RS, Brazil;2. Faculty of Engineering and Architecture (FEAR), Chemical Engineering Course, University of Passo Fundo (UPF), Passo Fundo, RS, Brazil;3. Faculty of Agronomy and Veterinary Medicine (FAMV), Postgraduate Program in Food Science and Technology (PPGCTA), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil;4. Faculty of Engineering and Architecture (FEAR) Postgraduate Program in Civil and Environmental Engineering (PPGEng), University of Passo Fundo (UPF), Passo Fundo, RS, Brazil;5. Postgraduate Program in Environment and Agricultural Production Systems, Mato Grosso State University (UNEMAT), Tangará da Serra, MT, Brazil |
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Abstract: | The fishing industry is responsible for generating large amounts of organic waste rich in compounds of commercial interest. This review aimed to present the state of the art about the possibilities of using solid waste to obtain value-added products. Skins, fins, and scales have been used to obtain gelatin and collagen, a promising compound for use as an additive in yogurts and creams, as well as for the synthesis of biodegradable packaging that, if applicable, can reduce the environmental impact caused by petroleum packaging. Other parts, such as the head and the viscera, contain polyunsaturated fatty acids and other fat-soluble vitamins that have been studied for the production of omega-3 capsules for the pharmaceutical industry, but when the extracted oil does not fit the feeding parameters, it can be applied for the production of biodiesel. Furthermore, fishes are a promising source of astaxanthin, a carotenoid with high antioxidant properties. The use of combined techniques such as chemical and enzymatic methods can increase the extraction yield and favor the obtaining of more purified compounds, in addition to promoting the reduction of chemicals that are aggressive to the environment. In general, conscious production in the fishing industry through the valorization of waste generated for use as inputs for other value chains encompasses aspects of the circular economy, which can positively impact several Sustainable Development Goals. |
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Keywords: | astaxanthin circular economy collagen gelatin oil waste valorization |
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