Treating effluent with peroxide and iron

Details Treating effluent with peroxide and iron Treating effluent with peroxide and iron

1980-06-20

1982-03-23

Castel, Benoit

Liquid purification or separation

Processes

Treatment by living organism

210721, 210759, C02F 172

Patent

active

043211437

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.

REFERENCES:
patent: 4221661 (1980-09-01), Shimizu et al.

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