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6CCVD Research

Performance of Electrochemical Processes in the Treatment of Reverse Osmosis Concentrates of Sanitary Landfill Leachate

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2019-08-10
JournalMolecules
AuthorsAnnabel Fernandes, Oumaima Chamem, Maria JosĆ© Pacheco, Lurdes CirĆ­aco, Moncef ZaĆÆri
InstitutionsUniversity of Beira Interior
Citations33

Abstract

Section titled ā€œAbstractā€

Electrochemical technologies have been broadly applied in wastewaters treatment, but few studies have focused on comparing the performance of the different electrochemical processes, especially when used to treat highly-polluted streams. The electrochemical treatment of a reverse osmosis concentrate of sanitary landfill leachate was performed by means of electrocoagulation (EC), anodic oxidation (AO) and electro-Fenton (EF) processes, and the use of different electrode materials and experimental conditions was assessed. All the studied processes and experimental conditions were effective in organic load removal. The results obtained showed that EC, with stainless steel electrodes, is the cheapest process, although it presents the disadvantage of sludge formation with high iron content. At high applied current intensity, AO presents the best treatment time/energy consumption ratio, especially if the samplesā€™ initial pH is corrected to 3. However, pH correction from natural to 3 deeply decreases nitrogen-containing compoundsā€™ removal. For longer treatment time, the EF process with a carbon-felt cathode and a BDD anode, performed at natural iron content and low applied current intensity, is the most favorable solution.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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