Valorization of date palm (Phoenix dactylifera L.) pruning biomass by co-composting with urban and agri-food sludge

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Title: Valorization of date palm (Phoenix dactylifera L.) pruning biomass by co-composting with urban and agri-food sludge
Authors: Vico, Alberto | Pérez-Murcia, María Dolores | Bustamante, María A. | Agulló, Enrique | Marhuenda Egea, Frutos Carlos | Sáez-Tovar, José Antonio | Paredes, Concepción | Pérez-Espinosa, Aurelia | Moral, Raúl
Research Group/s: Grupo de Fotoquímica y Electroquímica de Semiconductores (GFES)
Center, Department or Service: Universidad de Alicante. Departamento de Agroquímica y Bioquímica
Keywords: Compost | Palm residues | Sewage sludge | EEM fluorescence | Economic value
Knowledge Area: Bioquímica y Biología Molecular
Issue Date: 15-Nov-2018
Publisher: Elsevier
Citation: Journal of Environmental Management. 2018, 226: 408-415. doi:10.1016/j.jenvman.2018.08.035
Abstract: In the Mediterranean countries, there is an increasing production of date palm wastes (Phoenix dactylifera L.), not only due to the raising production of date palm fruits, but also derived from the maintenance of urban and peri-urban green areas, especially in those affected by red palm weevil (Rhynchophorus ferrugineus). The management of this increasing volume of green wastes usually concludes with a controlled disposal that implies an important loss of resources, in terms of organic matter, nutrients and energy. In addition, the rise of wastewater generation and the incentive of the wastewater treatment processes have derived in an increase of the amount of the sludge produced, which makes difficult its management. This work studies the feasibility of co-composting palm wastes with sludge from the urban and agri-food sectors as alternative treatment to manage these organic waste streams and to obtain added-value compost. For this, four mixtures (P1, P2, P3 and P4) were prepared using as main component palm leave waste (PL) mixed with different types of sludge. In the piles P1, P2 and P3, sewage sludge (SS) was used as co-composting agent, while agri-food sludge (AS) was used in P4. Throughout composting, the thermal profile of the composting piles was assessed, as were physical, chemical, physico-chemical and maturity parameters. In addition, the changes in water-soluble organic matter were assessed using chemical analytical methods and the excitation–emission matrix (EEM) fluorescence spectroscopy. The results obtained showed the viability of the co-composting process to obtain end-products with adequate maturity degree and physical characteristics for their potential use as substrates, except for the salt contents that can limit their use in some agricultural sectors.
Sponsor: This work has been financed by the Spanish Ministry of Economy and Competitiveness and by European Regional Development Funds (ERDF, “Una manera de hacer Europa”), in the framework of the project “Development of new resources and bioproducts based on residues of palmaceous species oriented to carbon sequestration and mitigation strategies, Palmresource” (Project AGL2013-41612-R).
ISSN: 0301-4797 (Print) | 1095-8630 (Online)
DOI: 10.1016/j.jenvman.2018.08.035
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Elsevier Ltd.
Peer Review: si
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Appears in Collections:INV - GFES - Artículos de Revistas

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