A review on the treatment of landfill leachate by coupling advanced oxidation and biological processes
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The treatment of landfill leachate requires processes that efficiently remove the different contaminants present in this type of liquid waste. To treat this type of waste, a great diversity of biological processes have been used, which take advantage of the capacity to transform the different components of the liquid medium into biomass; however, these processes have limitations due to the intrinsic characteristics of the leachate. In recent years, the integration of biological processes with Advanced Oxidation Processes has been promoted, which would significantly reduce the toxic characteristics of these wastes to comply with the legal conditions to be discharged into the environment without causing damage. In this work, the authors present a review (2015 to 2021) concerning the biological treatment, and Advanced Oxidation Processes (based on ozone, electrochemical processes, and photocatalysis) are investigated. These processes are analyzed in combination to describe the optimal conditions under which pollutant loads of landfill leachate are reduced. Finally, it is possible to identify that the treatment processes under study are technologies that can be coupled, registering higher efficiency and lower generation of waste by-products or sludge.
Yrany M. Rubio-Gomez, Universidad Francisco de Paula Santander, Facultad de Ciencias Agrarias y del Ambiente, Norte de Santander, Colombia
https://orcid.org/0000-0001-6889-2859
Andrés F. Barajas-Solano, Universidad Francisco de Paula Santander, Facultad de Ciencias Agrarias y del Ambiente, Norte de Santander, Colombia
https://orcid.org/0000-0003-2765-9131
Luisa F. Ramírez Ríos, Universidad Francisco de Paula Santander, Facultad de Ciencias Agrarias y del Ambiente, Norte de Santander, Colombia
https://orcid.org/0000-0002-0973-3847
Fiderman Machuca-Martínez, Universidad del Valle, Facultad de Ingenierías, Cali, Colombia
https://orcid.org/0000-0002-4553-3957
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Accepted 2023-05-24
Published 2023-09-08
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