Treating effluent with peroxide and iron

US4321143A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Klaus G. Wilms · Dormagen, DE
• Helmut Waldmann · Leverkusen, DE

Key dates

• Filing date: Jun 20, 1980
• Grant date: Mar 23, 1982
• Expiry date: Jun 20, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F1/725
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

In the process for decreasing the COD-content of effluent by treating with hydrogen peroxide in the presence of a transition metal compound, the improvement which comprises adding to the effluent about 50 to 65% of the calculated quantity of H.sub.2 O.sub.2 required for the total oxidation of the total COD-content of the effluent, the transition metal compound being dissolved in the effluent in an amount such that the molar ratio of H.sub.2 O.sub.2 to transition metal is from about 30:1 to 3:1, bringing the pH initially to about 2 to 9, maintaining the effluent at about 5.degree. to 100.degree. C., and separating from the effluent whatever material has flocculated. Thereafter the effluent can be subjected to conventional biological degradation such as by the activated sludge process.