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- W4313256837 abstract "BACKGROUND This study investigates, for the first time, the most beneficial conditions for photocatalytic oxidation under ultraviolet (UV) irradiation provided by either a solar simulator, UVA light-emitting diode (UVA-LED), or UVA blacklight lamp (UVA-BL) as a post-treatment step for the degradation of the residual COD and color in winery wastewater (WiWW) after biological treatment. RESULTS The effect of WiWW dilution (0, 50%), TiO2 concentration (0–1000 mg/L), catalyst type (TiO2, ZnO), pH (3, 6, 8.4), H2O2 addition (0–1000 mg/L), and treatment time on process efficiency was evaluated. At the best-assayed conditions (1000 mg/L TiO2, 1000 mg/L H2O2), COD removal percentages in the range of 94–97% were obtained and color was removed by 99% within 180 min of treatment under all irradiation sources. The process was enhanced when the WiWW was subjected to 50% dilution and its pH was adjusted to 6. Among the three irradiation sources, UVA-BL led to a marginally higher photocatalytic performance than solar and UVA-LED, both of which achieved similar removal efficiencies. Regarding energy efficiency, UVA-LED was found to be up to 1.7 times more energy efficient than UVA-BL/TiO2. Finally, in most cases, the phytotoxicity of secondary effluent was eliminated during solar photocatalytic treatment. CONCLUSION Alteration of basic operating parameters significantly improved process efficiency. In all cases, LED-driven photocatalysis combined high removal performance and energy efficiency, proving to be an appropriate and sustainable alternative to solar photocatalysis for 24 h operation or for supplementary application during the harvest, when the majority of WiWW is generated. © 2022 Society of Chemical Industry (SCI)." @default.
- W4313256837 created "2023-01-06" @default.
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- W4313256837 date "2023-01-02" @default.
- W4313256837 modified "2023-09-25" @default.
- W4313256837 title "Photocatalytic treatment as a polishing step for the degradation of bio‐recalcitrant fractions of winery wastewater under solar, <scp>UVA‐LED,</scp> and blacklight irradiation" @default.
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- W4313256837 doi "https://doi.org/10.1002/jctb.7304" @default.
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