Pre-coagulated landfill leachate treatment by synergistic ultraviolet and electro-persulfate process

OpenAlex İngilizce

In this study, the integration of ultraviolet (UV) and electrochemically activated persulfate (PS) oxidation (UV/Electro-PS) was investigated in pretreated landfill leachate treatment.Optimum process parameters for chemical oxygen demand (COD), UV 254 , and color removal from pre-coagulated landfill leachate were investigated.The process variables and ranges of variables were selected as pH 3-11, applied current 1-5 A, PS dose 1-9 g/L, and reaction time 5-35 min.Optimum process conditions were determined as pH 3, applied current 3 A, PS dose 5 g/L, and reaction time 25 min.By applying optimum conditions, COD, UV 254 , and color removal efficiencies by the UV/Electro-PS process were 55.6%, 68.5%, and 89.9%, respectively.The total energy consumption was calculated as 27.4 kWh/kg COD for the optimum process conditions.UV/Electro-PS process was effective for the COD, UV 254 , and color removal from pre-coagulated landfill leachate.