Oxygen aeration system for contaminated liquids

Details Oxygen aeration system for contaminated liquids Oxygen aeration system for contaminated liquids

1974-07-24

1976-04-27

Hart, Charles N.

Liquid purification or separation

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

Responsive to fluid flow

210 15, 210195S, 210220, C02C 106

Patent

active

039533263

ABSTRACT:
In a process for the purification of an organically contaminated liquid in an aeration tank in the presence of activated sludge, wherein a gas having a higher concentration of oxygen than air is introduced into an aeration tank, containing a mixture of liquid and activated sludge said tank having above at least the major part of the liquid, an atmosphere more enriched with oxygen than air, wherein said liquid and activated sludge are passed to a secondary settling tank and wherein a portion of the activated sludge obtained from the secondary settling tank is recycled as return sludge into the aeration tank,
The improvement which comprises:

REFERENCES:
patent: 1937434 (1933-11-01), Platt
patent: 2366945 (1945-01-01), Walker
patent: 2638444 (1953-05-01), Kappe
patent: 3439807 (1969-04-01), Danjes
patent: 3547811 (1970-12-01), McWhirter
patent: 3547813 (1970-12-01), Robinson et al.
patent: 3617562 (1971-11-01), Cywin et al.
patent: 3660277 (1972-05-01), McWhirter et al.
patent: 3794303 (1974-02-01), Hirshon
patent: 3840216 (1974-10-01), Smith et al.

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