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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/49072

    Título
    Liquid fertilizer production from organic waste by conventional and microwave-assisted extraction technologies: Techno-economic and environmental assessment
    Autor
    Fernández Delgado, MarinaAutoridad UVA Orcid
    Amo Mateos, Esther DelAutoridad UVA Orcid
    Lucas Yagüe, SusanaAutoridad UVA Orcid
    García Cubero, María TeresaAutoridad UVA Orcid
    Coca Sanz, MónicaAutoridad UVA Orcid
    Año del Documento
    2021
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Science of The Total Environment, 2022, vol. 806, n. 4, 150904
    Résumé
    The use of mineral fertilizers in agriculture has significantly increased to support the growing global food demand. Organic fertilizers are produced from renewable waste materials to overcome the drawbacks of inorganic fertilizers. The development of novel production processes of organic fertilizers entails a significant advance towards the circular economy that reincorporates waste materials into the production cycle. In this work, the economic and environmental feasibility of an industrial plant with a treatment capacity of 300 kg/h of organic waste for the production of liquid fertilizers has been performed. Two extraction technologies (conventional and microwave) and two solvents (water and alkaline) have been compared to select the most sustainable and profitable scenario for scaling-up. The extraction process consists of 2 steps: extraction followed by a concentration stage (necessary only if water extraction is applied). The resolution of the mass balances shows that the fertilizer production under alkaline conditions is ten times higher than for water-based extraction. The economic analysis demonstrated that the total investment cost of microwave technology (>3.5 M€) is three times higher compared to the conventional extraction technology (<1.5 M€), mainly due to the higher complexity of the equipment. These facts directly impact the minimum selling price, because the fertilizers obtained by conventional extraction with alkaline solvent would have a lower selling price (about 1 €/L). As for environmental assessment, the indicators show that the environmental impact produced by water-based extraction is higher than alkaline-solvent extraction, mainly due to the necessity of a concentration stage of the liquid extract to meet the requirements of European regulations. In view of the results obtained in the economic and environmental evaluation, it could be concluded that the most favourable scenario for scaling up the production of liquid fertilizers from organic waste is the conventional extraction under alkaline conditions.
    Palabras Clave
    Waste compost
    Gestión de residuos
    Nutrient recovery
    Recuperación de nutrientes
    Organic fertilizers
    Abono orgánico
    Sustainability
    Sostenibilidad
    ISSN
    0048-9697
    Revisión por pares
    SI
    DOI
    10.1016/j.scitotenv.2021.150904
    Patrocinador
    Programa INTERREG V-A España-Portugal y Fondo Europeo de Desarrollo Regional (project 0119_VALORCOMP_2_P)
    Junta de Castilla y León (grants UIC 320, CLU 2017-09 and E-47-2019-0114592)
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S0048969721059829?via%3Dihub
    Propietario de los Derechos
    © 2021 Elsevier
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/49072
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP48 - Artículos de revista [265]
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    Liquid-fertilizer-production-organic.pdf
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