Integrated valorization of Sargassum muticum in biorefineries
| Autor: | María Dolores Torres, Marta Sánchez, Manuel E. Sastre de Vicente, Noelia Flórez-Fernández, Marta Illera, Manuel Soto, M. E. López-Mosquera, Herminia Domínguez, Pablo Lodeiro |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
General Chemical Engineering
Biogas Context (language use) Fraction (chemistry) 02 engineering and technology Raw material 010402 general chemistry 7. Clean energy 01 natural sciences Industrial and Manufacturing Engineering chemistry.chemical_compound Environmental Chemistry Sargassum muticum Pollutant biology Fucoidan General Chemistry 021001 nanoscience & nanotechnology Biorefinery Pulp and paper industry biology.organism_classification Seaweed 0104 chemical sciences Biostimulants chemistry 13. Climate action 0210 nano-technology |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Recercat: Dipósit de la Recerca de Catalunya Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Popis: | Marine macroalgae represent an excellent raw material for the production of bioactives, adsorbents, plant biostimulants, soil fertilizers and biogas. The success in the exploitation of seaweeds depends on their characteristics, and the approach used to separate their specific active components. In the context of circular economy, invasive species are a good candidate for exploitation, and biorefinery a key valorization technique. Here we investigate a novel biorefinery scheme for an integral valorization of Sargassum muticum. An initial pressing stage allowed the production of a Sap fraction, which showed potential as a plant biostimulant, increasing both root development and shoot/root ratio, especially when used at a dose of 0.1 g/L lyophilized Sap. The solids after pressing were processed by non isothermal autohydrolysis, using pressurized hot water (up to 120-210 °C), a process previously optimized to solubilize the fucoidan and phlorotannin fractions. The residual solids remaining after pressing and autohydrolysis stages were evaluated for the production of biogas. The obtained value (150 mL CH4/g residual solids at 150 °C) was significantly higher than that found for the raw seaweed. The optimal autohydrolysis temperature (150 °C) is compatible with the production of the fucoidan fraction, although the phenolic content is favoured under more severe operation conditions. We also discuss the possibility of preparing adsorbents for pollutant removal and mineral amendments from the autohydrolysis waste solids. The authors are grateful to the Spanish Ministry of Education and Science (CTM2009-12664) and to Xunta de Galicia (CINBIO Centro singular de investigación de Galicia accreditation 2019-2022) with partial financial support from the European Regional Development Fund – ERDF (Ref. ED431G2019/06). M.D.T. thanks Spanish Ministry of Economy and Competitiveness for her postdoctoral grant (IJCI-2016-27535 and RYC2018-024454-I). N.F.F. thanks CINBIO and Xunta de Galicia for her postdoctoral contract (ED481B 2018/071). MICINN/PN2008-2011/CTM2009-12664 |
| Databáze: | OpenAIRE |
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