Wastewater treatment

Details Wastewater treatment Wastewater treatment

1984-06-25

1986-02-11

Hruskoci, Peter

Liquid purification or separation

Processes

Chemical treatment

210763, 423544, C02F 172

Patent

active

045697698

ABSTRACT:
Aqueous alkaline sulfidic waste effluents are often subjected to air oxidation processes that for economic sizing oxidize the sulfides only to thiosulfates. Thiosulfates are still immediate oxygen demanders and thus their concentration in the effluent must normally be reduced to below a threshold level before the effluent can be discharged. The effectiveness of hydrogen peroxide for this purpose can be significantly improved both as to rate of reaction and extent of removal by employing a copper catalyst in solution.

REFERENCES:
patent: 3186942 (1965-06-01), Benger
patent: 3721624 (1973-03-01), Fisch et al.
patent: 4292293 (1981-09-01), Johnson et al.
patent: 4321143 (1982-03-01), Wilms et al.
patent: 4443342 (1984-04-01), Stas et al.
Schumb, et al., Hydrogen Peroxide, pp. 398-399, Reinhold Publishing Co. (1955).
Mucenieks, et al., "The Use of Hydrogen Peroxide for the Oxidation of Sulfur Chemical Wastes", Presented at the 7th Middle Atlantic Industrial Waste Conference, Drexel University, Nov. 13, 1974.
Kibble, W. H., "Treating Industrial Wastewater with Hydrogen Peroxide", Plant Engineering, Nov. 15, 1979, pp. 137-140.
Kibble, W. H., "Peroxide Treatment for Industrial Waste Problems", Industrial Water Engineering, Aug./Sep. 1976, pp. 6-11.

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