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US 4,066,538 AGranted
Water purification by treating with activated carbon before biochemical treatment
AssigneePhillips Petroleum Company
InventorsMartin R. Cines, Ben B. Buchanan
Life of this patent
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Abstract
Waste water having a high chemical oxygen demand caused primarily by soluble organic matter is treated with activated carbon and thereafter passed to a biochemical treating operation.
Claims11
A process comprising:
- contacting waste water having a COD of greater than 1000 milligrams/liter, over 50 percent of the material creating said COD being soluble in said water, with activated carbon;
- thereafter subjecting said thus treated water to a biochemical treatment to further reduce said COD.
Dependencies are inferred from the claim text.