Advanced treatment of the reverse osmosis concentrate produced during reclamation of municipal wastewaterAdvanced treatment of the reverse osmosis concentrate produced during reclamation of municipal wastewater Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-11-182008enThe work investigated the treatment of the concentrate produced from the reverse osmosis treatment of an MBR effluent. Two conventional chemical processes, coagulation and activated carbon adsorption, and three advanced oxidation processes (electrochemical treatment, photocatalysis and sonolysis) were applied. Coagulation with alum gave dissolved organic carbon (DOC) removals up to 42%, while FeCl(3) achieved higher removals (52%) at lower molar doses. Adsorption with granular activated carbon showed the highest DOC removals up to 91.3% for 5 g/L. The adsorption isotherm was linear with a non-adsorbable organic fraction of around 1.2 mg/L DOC. The three oxidation methods employed, electrolytic oxidation over a boron-doped diamond electrode, UVA/TiO2 photocatalysis and sonolysis at 80 kHz, showed similar behavior: during the first few minutes of treatment there was a moderate removal of DOC followed by further oxidation at a very slow rate. Electrolytic oxidation was capable of removing up to 36% at 17.8A after 30 min of treatment, sonolysis removed up to 34% at 135W after 60 min, while photocatalysis was capable of removing up to 50% at 60 min. http://creativecommons.org/licenses/by/4.0/Water Research42184603-4608 Dialynas Emmanouil Διαλυνας Εμμανουηλ Mantzavinos Dionysis Μαντζαβινος Διονυσης Diamantopoulos Evaggelos Διαμαντοπουλος Ευαγγελος Elsevier Water research Wastewater