Integral Valorization of Two-Phase Olive Mill Solid Waste (OMSW) and Related Washing Waters by Anaerobic Co-digestion of OMSW and the Microalga Raphidocelis subcapitata Cultivated in These Effluents
2022
Fernández-Rodríguez, M. J. | De la Lama-Calvente, David | García-González, Mercedes | Moreno-Fernández, José | Jiménez-Rodríguez, Antonia | Borja Padilla, Rafael | Rincón, Bárbara | Ministerio de Economía y Competitividad (España) | Junta de Andalucía | Borja Padilla, Rafael [0000-0002-3699-7223] | Rincón, Bárbara [0000-0002-2652-9231] | Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
This study evaluates the comprehensive valorization of the byproducts derived from the two-phase olive oil elaboration process [i.e., olive washing water (OWW), olive oil washing water (OOWW), and olive mill solid waste (OMSW)] in a closed-loop process. Initially, the microalga Raphidocelis subcapitata was grown using a mixture of OWW and OOWW as the culture medium, allowing phosphate, nitrate, sugars, and soluble chemical oxygen demand removal. In a second step, the microalgal biomass grown in the mixture of washing waters was used as a co-substrate together with OMSW for an anaerobic co-digestion process. The anaerobic co-digestion of the combination of 75% OMSW-25% R. subcapitata enhanced the methane yield by 7.0 and 64.5% compared to the anaerobic digestion of the OMSW and R. subcapitata individually. This schedule of operation allowed for integration of all of the byproducts generated from the two-phase olive oil elaboration process in a full valorization system and the establishment of a circular economy concept for the olive oil industry.
Afficher plus [+] Moins [-]Barbara Rincón-Llorente thanks the “Ramon y Cajal ” Program (Contract RYC-2011-08783) from the Spanish Ministry of Economy and Competitiveness. The authors also thank the Regional Government of Andalucía, Junta de Andalucía, Consejeria de Economía Innovación, Ciencia y Empleo (Project of Excellence RNM-1970) for funding the research.
Afficher plus [+] Moins [-]Peer reviewed
Afficher plus [+] Moins [-]Mots clés AGROVOC
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