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US 6,554,977 B2Granted
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.
Claims9
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;
- pre-oxidation means for adjusting conductivity of the wastewater to a range of from about 200 μS/cm to about 2000 μS/cm;
- means for applying a voltage in a range of from about 1 V to about 20 V across the stainless steel anode and cathode to produce a current in a range of from about 2 to 20 amperes in the electrolytic oxidation cell to effect electrolytic oxidation conditions therein when the cell contains wastewater;
- and
- means for flowing wastewater into and out of the electrolytic oxidation cell.
2 more elements
Dependencies are inferred from the claim text.