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

• DOI: 10.1021/acs.jafc.1c08100
• Publication Date: 2022-03-07T19:11:12Z
• Authors: María José Fernán...; David de la Lama-...; Mercedes García-G...; José Moreno-Ferná...; Antonia Jiménez-R...; Rafael Borja; Bárbara Rincón-Ll...
• Keywords: Biogas

This study evaluates the comprehensive valorization of byproducts derived from two-phase olive oil elaboration process [i.e., washing water (OWW), (OOWW), and mill solid waste (OMSW)] in a closed-loop process. Initially, microalga Raphidocelis subcapitata was grown using mixture OWW OOWW as culture medium, allowing phosphate, nitrate, sugars, soluble chemical oxygen demand removal. In second step, microalgal biomass waters used co-substrate together with OMSW for an anaerobic co-digestion The combination 75% OMSW-25% R. enhanced methane yield by 7.0 64.5% compared to digestion individually. schedule operation allowed integration all generated full system establishment circular economy concept industry.