RT info:eu-repo/semantics/article
T1 UVA-LED technology’s treatment efficiency and cost in a competitive trial applied to the photo-fenton treatment of landfill leachate
A1 Tejera Tejo, Javier
A1 Gasco Guerrero, Antonio María
A1 Hermosilla Redondo, María Daphne
A1 Alonso Gómez, Víctor
A1 Negro Alvarez, Carlos Manuel
A1 Blanco Suárez, Ángeles
K1 Sewage - Purification
K1 Water - Purification
K1 Aguas residuales - Depuración y tratamiento
K1 Tratamiento de aguas
K1 Residuos - Tratamiento
K1 Coagulation pre-treatment
K1 Pretratamiento de coagulación
K1 Landfill leachate
K1 Lixiviados de vertedero
K1 Photo-Fenton
K1 3308.10 Tecnología de Aguas Residuales
AB The objective of this trial was to assess the application of UVA-LED technology as an alternative source of irradiation for photo-Fenton processes, aiming to reduce treatment costs and provide a feasible treatment for landfill leachate. An optimized combination of coagulation with ferric chloride followed by photo-Fenton treatment of landfill leachate was optimized. Three different radiation sources were tested, namely, two conventional high-pressure mercury-vapor immersion lamps (100 W and 450 W) and a custom-designed 8 W 365 nm UVA-LED lamp. The proposed treatment combination resulted in very efficient degradation of landfill leachate (COD removal = 90%). The coagulation pre-treatment removed about 70% of the COD and provided the necessary amount of iron for the subsequent photo-Fenton treatment, and it further favored this process by acidifying the solution to an optimum initial pH of 2.8. The 90% removal of color improved the penetration of radiation into the medium and by extension improved treatment efficiency. The faster the Fenton reactions were, as determined by the stoichiometric optimum set-up reaction condition of [H2O2]0/COD0 = 2.125, the better were the treatment results in terms of COD removal and biodegradability enhancement because the chances to scavenge oxidant agents were limited. The 100 W lamp was the least efficient one in terms of final effluent quality and operational cost figures. UVA-LED technology, assessed as the application of an 8 W 365 nm lamp, provided competitive results in terms of COD removal, biodegradability enhancement, and operational costs (35–55%) when compared to the performance of the 450 W conventional lamp.
PB MDPI
SN 2227-9717
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/59804
UL https://uvadoc.uva.es/handle/10324/59804
LA eng
NO Processes, 2021, Vol. 9, Nº. 6, 1026
NO Producción Científica
DS UVaDOC
RD 22-dic-2024