Electrolytic wastewater treatment apparatus
OwnerClyde Kuen-Hua Hu, Paul Pei-Yung Hu +1inventors
InventorsClyde Kuen-Hua Hu, Paul Pei-Yung Hu, Patrick Pei-Chih Hu
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Abstract
A method and apparatus for purifying aqueous effluent streams to reduce chemical oxygen demand thereof, where the method comprises direct oxidation of water-soluble organic material in an electrochemical cell that incorporates stainless steel electrodes, whose stability and lifetime are enhanced by inclusion of circulating metal chips.
Claims20
An electrolytic oxidation process for purifying wastewater by oxidation of organic and oxidizable inorganic substances contained therein, said process comprising:
- flowing the wastewater into an electrolytic oxidation cell, where the cell comprises a stainless steel anode and cathode and contains iron chips, said chips being in electrical contact with the anode and prevented from making electrical contact with the cathode by a non-electrically-conductive, liquid-permeable barrier;
- applying a voltage across the electrodes to energize the electrolytic oxidation cell and effect electrolytic oxidation of organic and oxidizable inorganic substances in the wastewater;
- and
- discharging from the electrolytic oxidation cell a treated wastewater having a reduced COD content.
An electrolytic oxidation apparatus for purifying wastewater by oxidation of water-soluble organic and oxidizable inorganic substances contained therein, said apparatus comprising:
- an electrolytic oxidation cell, where the cell comprises a stainless steel anode and cathode and contains iron chips, said chips being in electrical contact with the anode and prevented from making electrical contact with the cathode by a non-electrically-conductive, liquid-permeable barrier;
- means for applying a voltage across the stainless steel anode and cathode sufficient to effect electrolytic oxidation conditions in the electrolytic oxidation cell when the cell contains wasterwater;
- and
- means for flowing wastewater into and out of the electrolytic oxidation cell.
An electrolytic oxidation apparatus for oxidation of wastewater to reduce the COD content thereof, said apparatus comprising an electrolytic cell including a stainless steel anode and a stainless steel cathode, a non-conductive, liquid-permeable barrier between the anode and cathode, metal chips in the cell on the anode side of the liquid-permeable barrier, means for introducing wastewater to the cell and for discharging COD-reduced wastewater therefrom, and means for impressing an electrical potential difference across the anode and cathode to effect electrolytic oxidation of wastewater when introduced to the electrolytic cell.
Dependencies are inferred from the claim text.