Means for biological treatment of water

Details Means for biological treatment of water Means for biological treatment of water

1978-03-29

1980-07-08

Castel, Benoit

Liquid purification or separation

Recirculation

Serially connected distinct treating or storage units

210220, C02F 320

Patent

active

042116570

ABSTRACT:
An improved means for biological treatment of sewage characterized in the provision of a single aerating device feeding waste water serially into first and second settling chambers. The aerating chamber has a horizontal sectional area which generally increases in size from a relatively smaller horizontal sectional area at the bottom of a relatively larger horizontal sectional area at the top. The aeration chamber is characterized in the introduction of relatively large air bubbles within the water being aerated. The larger bubbles tend to move more quickly to the surface of the liquid being aerated, thereby increasing normal water movement and achieving more rapid oxidation. Plural settling chambers are connected by passageways to the aeration chamber, and an aerator in the aeration chamber causes recirculation of activated sludge from both chambers through the passageways, thereby treating in succession and maintaining sludge loss in the effluent at a minimum.

REFERENCES:
patent: 2574685 (1951-11-01), Baxter et al.
patent: 3058908 (1962-10-01), Morgan
patent: 3246762 (1966-04-01), Sontheimer et al.
patent: 3339741 (1967-09-01), Bernard et al.
patent: 3355023 (1967-11-01), Foster
patent: 3464559 (1969-09-01), Bernard
patent: 3834540 (1974-09-01), Bernard
patent: 4059524 (1977-11-01), Chataigner et al.

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