Process for removing COD and heavy metals from FGD wastewater using electrolysis

摘要

PURPOSE: To provide a process for removing COD and heavy metals from flue gas desulfurization (FGD) wastewater, which is capable of reducing steps for the process and maximizing a maintenance efficiency, by using an electrolysis. CONSTITUTION: The process comprises the steps of (a) precipitating floating solid materials in FGD wastewater to remove the floating solid materials therefrom; (b) electrolyzing the floating solid materials removed FGD wastewater to remove refractory COD component, heavy metals, fluorine, calcium and the like therefrom; (c) precipitating a scale component generated by the electrolysis to remove it as a slurry form; and (d) removing the floating solid material remained after the precipitating step.