RT Journal Article
T1 Treatment of mature landfill leachate by electrocoagulation followed by Fenton or UVA-LED photo-Fenton processes
A1 Tejera Tejo, Javier
A1 Hermosilla Redondo, Daphne
A1 Gascó, Antonio
A1 Miranda Carreño, Rubén
A1 Alonso, Víctor
A1 Negro Álvarez, Carlos Manuel
A1 Blanco Suárez, Ángeles
AB The main objective of this study is to optimize a two-step treatment for mature landfill leachate consisting of electrocoagulation (EC) followed by Fenton or UVA-LED photo-Fenton processes aiming to provide a more efficient and feasible alternative treatment strategy that also increases biodegradability and decreases conductivity. Although 5 mA cm−2 EC is cheaper than 10 mA cm−2 EC per kg of removed COD (0.63 vs. 0.89 € kgCOD−1), it achieved the half total COD removal (13% compared to 26%), and the low residual iron concentration (100 mg L−1) that remained at the end of the process made necessary a long treatment time to perform the posterior Fenton (48 h) or UVA-LED photo-Fenton (6 h) process. When EC was performed at 10 mA cm−2, the residual iron concentration (220 mg L−1) was high enough to reduce treatment time by one half for both Fenton processes. Consequently, treatment cost decreases from 5.91 to 3.48 € kgCOD−1 for the EC + UVA-LED photo-Fenton ([H2O2]/COD = 1.063) treatment combination; whereas it slightly decreases from 1.68 to 1.61 € kgCOD−1 for the alternative EC + conventional Fenton combination. In both cases, total COD removal was around 87%. In addition, SUVA removal was >40%, conductivity was reduced about 20–30%, and biodegradability (BOD5/COD) increased over 0.3.
PB Elsevier
SN 1876-1070
YR 2021
FD 2021-02-18
LK https://hdl.handle.net/20.500.14352/6749
UL https://hdl.handle.net/20.500.14352/6749
LA eng
NO CRUE-CSIC (Acuerdos Transformativos 2021)
NO Ministerio de Economía, Industria y Competitividad (MINECO)
NO Comunidad de Madrid
DS Docta Complutense
RD 30 abr 2024