Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1975-01-20
1977-10-11
Wyse, Thomas G.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 20, 210 32, 210 40, C02C 104, C02C 504
Patent
active
040533964
ABSTRACT:
Organic contaminants are removed from waste water streams by initially pretreating the stream to remove suspended solids and oil therefrom and thereafter passing the pretreated waste water through bed(s) of activated carbon while adding a controlled amount of oxygen to the bed(s) in an amount ranging from about 0.05 to about 0.15 pound of oxygen consumed per pound of total COD contaminants removed from the waste water by this process. By following the method of the present invention, the balance between the aerobic/anaerobic biological oxidation of the contaminants adsorbed on the activated carbon may be controlled so as to suppress the evolution of hydrogen sulfide from the bed while minimizing the formation of aerobic biological sludge which would plug the bed(s). This controlled biological activity that occurs in the carbon adsorption system provides for a substantial increase in the effective organic contaminant removal capacity of the activated carbon. It is preferred that the oxygen is dissolved in the waste water stream prior to contact with the bed(s) of activated carbon.
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Weber et al., "Physiochemical Treatment of Wastewater," J.W.P.C.F., vol. 42, Jan., 1970, pp. 83-99.
Clamen Allen
Fernbacher John M.
Trense Ronald V.
Ditsler John W.
Exxon Research & Engineering Co.
Wyse Thomas G.
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