APPARATUS AND METHOD FOR ELECTROCHEMICAL TREATMENT OF WASTEWATER

摘要

The wastewater treatment apparatus of present invention has an electro-coagulation unit for removing contaminants with at least one anode and at least one cathode and an electro-oxidation unit for oxidizing contaminants with at least one anode and at least one cathode wherein oxidants are electrochemically generated. Based on the type of wastewater, the apparatus can have an electro-flotation unit between the electrocoagulation unit and the electro-oxidation unit. The apparatus also has an oxidant removal unit which can have a metal ion-liberating electrode for reacting with and removing residual oxidants. In some cases, portions of effluent from the oxidant removal unit can be recirculated to the electro-coagulation unit for increased efficiency.

主权项

1. A process for treating wastewater comprising:
electro-coagulating contaminants of said wastewater in an electro-coagulation unit; electro-oxidizing contaminants of said wastewater in an electro-oxidation unit; and liberating metal ions from an electrode to react with residual oxidants and produce metal oxides that can be separated from the wastewater in an oxidant removal unit.