Method for reduction of cod in water
First Claim
1. A method for reducing chemical oxygen demand (COD) levels in water containing chemical contaminants comprising the steps of:
- (a) adding at least one oxygen source to the water;
(b) contacting the water with a first catalyst consisting of activated alumina;
(c) contacting the water from (b) with a catalyst selected from the group consisting of Group VIIIB metals, Group IB metals or mixtures thereof;
(d) reacting the chemical contaminants entrained in the water with the oxygen source in the presence of the first and second catalysts; and
, then(e) contacting the water with an adsorptive material to adsorb any chemical contaminants which remain in the water.
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Abstract
A method and apparatus for reducing chemical oxygen demand levels in water which includes the steps of:
(a) mixing the water to be treated with at least one oxygen source;
(b) contacting the water with a first, activated alumina catalyst;
(c) contacting the water with a catalyst selected from the group consisting of Group VIIIB metals, Group IB metals or mixtures thereof;
(d) reacting chemical contaminants in the water with the oxygen source; and finally
(e) contacting the water with an adsorptive material such as activated carbon.
The present invention also includes a method and apparatus for regenerating the catalyst in situ by contacting the catalyst with alkaline and acidic aqueous inorganic regeneration solutions.
41 Citations
29 Claims
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1. A method for reducing chemical oxygen demand (COD) levels in water containing chemical contaminants comprising the steps of:
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(a) adding at least one oxygen source to the water; (b) contacting the water with a first catalyst consisting of activated alumina; (c) contacting the water from (b) with a catalyst selected from the group consisting of Group VIIIB metals, Group IB metals or mixtures thereof; (d) reacting the chemical contaminants entrained in the water with the oxygen source in the presence of the first and second catalysts; and
, then(e) contacting the water with an adsorptive material to adsorb any chemical contaminants which remain in the water. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification