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  • Title: Continuous solar photo-Fenton for wastewater reclamation in operational environment at demonstration scale.
    Author: Gualda-Alonso E, Pichel N, Soriano-Molina P, Olivares-Ligero E, Cadena-Aponte FX, Agüera A, Sánchez Pérez JA, Casas López JL.
    Journal: J Hazard Mater; 2023 Oct 05; 459():132101. PubMed ID: 37487332.
    Abstract:
    For the first time, a continuous flow solar photo-Fenton demonstration plant has been assessed for wastewater reclamation according to the EU 2020/741 regulation. The treated water qualities achieved under two operating strategies (acidic and neutral pH) in a 100-m2 raceway pond reactor were explored in terms of liquid depth, iron source, reagent concentrations, and hydraulic residence time over three consecutive days of operation. The results obtained at acidic pH showed removal percentages of contaminants of emerging concern (CECs) > 75% and water quality classes B, C and D according to EU regulation at both assessed operating conditions, with treatment capacities up to 1.92 m3 m-2 d-1. At neutral pH with ferric nitrilotriacetate (Fe3+-NTA), 50% of CEC removal and only water quality class D were achieved with the most oxidizing condition assessed, giving a treatment capacity of 0.80 m3 m-2 d-1. The treatment capacities obtained in this work, which have never been achieved with solar water treatments, demonstrate the potential of this technology for commercial-scale application.
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