Sewage treatment system and process

Details Sewage treatment system and process Sewage treatment system and process

1979-04-02

1981-06-02

Cintins, Ivars C.

Liquid purification or separation

Processes

Treatment by living organism

210703, 2101953, 2102212, 210197, 210202, 210537, C02B 300, B01D 2110

Patent

active

042710278

ABSTRACT:
The following disclosure teaches ways and means for clarifying raw sewage and thickening secondary sewage sludge. The disclosed apparatus comprises a tank having upper and lower feedwells disposed therein. Raw sewage is introduced into the lower feedwell and flows into the lower part of the tank to be clarified therein, and secondary sludge is aerated and introduced into the upper feedwell so that it flows therefrom and thickens in the upper part of the tank by flotation type thickening.

REFERENCES:
patent: 2679477 (1954-05-01), Kivari
patent: 2713026 (1955-07-01), Kelly
patent: 2772234 (1956-11-01), Kelly
patent: 2779730 (1957-01-01), Kelly et al.
patent: 3140259 (1964-07-01), Kelly
patent: 3622508 (1971-11-01), Komline
patent: 3642617 (1972-02-01), Brink et al.
patent: 4082671 (1978-04-01), Kelly
patent: 4173534 (1979-11-01), Kelly

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