A critical review of state-of-the-art electrocoagulation technique applied to COD-rich industrial wastewaters

Electrocoagulation (EC) is one of the emerging technologies in groundwater and wastewater treatment as it combines benefits coagulation, sedimentation, flotation, electrochemical oxidation processes. Extensive research efforts implementing EC technology have been executed over last decade to treat chemical oxygen demand (COD)-rich industrial wastewaters with aim protect freshwater streams (e.g., rivers, lakes) from pollution. A comprehensive review available recent literature utilizing high COD levels presented. In addition, recommendations are provided for future studies improve broaden its range application. This paper introduces some which often adopted treatment. Then, process compared those techniques a COD-rich wastewater. The considered most privileged by different groups owing ability deal abundant volumes After, application single combined thoroughly reviewed. Finally, this attempts highlight potentials limitations EC. Related batch operation mode, best operational conditions found at 10 V 60 min voltage reaction time, respectively. These values guarantee removal efficiencies > 90%. also concludes that considerably large costs appears be serious drawback renders an unfeasible approach handling rich wastewaters. end, has attempted highlights potential limitation suggests vast notably field continuous flow system essential introduce convincing technology.