Biological intermediate sewage treatment with ozone pretreatment

Details Biological intermediate sewage treatment with ozone pretreatment Biological intermediate sewage treatment with ozone pretreatment

1974-11-13

1979-12-11

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 18, 210 63Z, C02B 138, C02C 106

Patent

active

041782399

ABSTRACT:
A process for intermediate treatment of aqueous sewage containing biodegradable materials and non-biodegradable materials. The sewage is contacted with an ozone-containing gas to pretreat the sewage by converting a substantial amount of the non-biodegradable material to biodegradable material, followed by a conventional secondary treatment with an O.sub.2 -containing gas such as air in the presence of aerobic or facultative anaerobic microorganisms.
The process may also include subsequent tertiary treatment with ozone to destroy the microorganisms after secondary treatment. A relatively small amount of the overall oxidizing gas requirements is provided by ozone. The secondary treatment is made more efficient by the ozone pretreatment.

REFERENCES:
patent: 3660277 (1972-05-01), McWhirter et al.
patent: 3730881 (1973-05-01), Armstrong
patent: 3779909 (1973-12-01), Wisfeld et al.
patent: 3804755 (1974-04-01), Cervantes

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