UVA-LED Technology’s Treatment Efficiency and Cost in a Competitive Trial Applied to the Photo-Fenton Treatment of Landfill Leachate

The objective of this trial was to assess the application UVA-LED technology as an alternative source irradiation for photo-Fenton processes, aiming reduce treatment costs and provide a feasible landfill leachate. An optimized combination coagulation with ferric chloride followed by leachate optimized. Three different radiation sources were tested, namely, two conventional high-pressure mercury-vapor immersion lamps (100 W 450 W) custom-designed 8 365 nm lamp. proposed resulted in very efficient degradation (COD removal = 90%). pre-treatment removed about 70% COD provided necessary amount iron subsequent treatment, it further favored process acidifying solution optimum initial pH 2.8. 90% color improved penetration into medium extension efficiency. faster Fenton reactions were, determined stoichiometric set-up reaction condition [H2O2]0/COD0 2.125, better results terms biodegradability enhancement because chances scavenge oxidant agents limited. 100 lamp least one final effluent quality operational cost figures. technology, assessed lamp, competitive removal, enhancement, (35–55%) when compared performance