Persülfat ve Peroksimonosülfat Oksidasyonu ile Kentsel Atıksuların Arıtımı

Advanced oxidation processes have started to be used as an alternative to conventional treatment methods in urban wastewater treatment. In the scope of this experimental study, the usability of PS/UV-C and PMS/UV-C processes for removing COD and TOC pollution parameters in urban wastewater was investigated in terms of being an alternative to conventional treatment methods and the performances of the processes were compared under varying conditions. An economic analysis comparison was also made for PS/UV-C and PMS/UV-C processes. The inlet wastewater of a real urban wastewater treatment plant was used as the inlet wastewater sample. As a result of studies investigating the effect of initial oxidant concentration (5, 10, 15, 20, and 25 mM) on the removal of COD and TOC parameters with PS/UV-C and PMS/UV-C processes, the highest removal efficiency was achieved with PS/UV-C process. At 25 mM persulfate concentration, after 180 minutes of reaction time, 95% COD and 92% TOC removal efficiencies were obtained at the natural pH value (7.6) of the input sample. Experimental studies were carried out at 25 mM oxidant concentration to determine the effect of the initial pH value (4, 7, 9, and 11) of the inlet wastewater sample on the removal of COD and TOC parameters by PS/UV-C and PMS/UV-C processes. As a result of the experimental studies carried out, the highest removal efficiency was obtained with the PS/UV-C process. In the case of an initial pH value of 4, removal efficiencies of 97% for COD and 98% for TOC were obtained. As a result of the cost comparison, the most effective and cost-effective process was found to be the PS/UV-C process. Electricity consumptions for the highest COD and TOC removal efficiencies were calculated as 73.3 kWh/m3 and 71.2 kWh/m3. In the light of the results obtained from the experimental studies, it was found that COD and TOC parameters were effectively removed from urban wastewater by PS/UV-C and PMS/UV-C processes.