Sewage treatment devices particularly for marine applications

Details Sewage treatment devices particularly for marine applications Sewage treatment devices particularly for marine applications

1975-03-06

1976-11-16

Hart, Charles N.

Liquid purification or separation

Structural installation

Flume stream type

210195S, 210220, 210256, C02C 108

Patent

active

039922995

ABSTRACT:
A sewage treatment apparatus of the activated sludge extended aeration type, particularly for use on board ships, comprises an inverted cone-shaped settling tank extending downwardly into an aerating tank. Sewage entering the aerating tank is constrained to flow around the outside of the settling tank, during which time it is aerated. The aerated liquid is then transferred to the settling tank, where sludge settling to the bottom thereof is removed and fed back to the aerating tank. An outlet means for removing treated liquid from just below the liquid surface in the settling tank is disposed at the center of said tank.

REFERENCES:
patent: 3118835 (1964-01-01), Butler et al.
patent: 3374893 (1968-03-01), Stretton
patent: 3487937 (1970-01-01), Koulovatos
patent: 3533508 (1970-10-01), Seipp et al.
patent: 3618779 (1971-11-01), Goodman
patent: 3627135 (1971-12-01), Goodman
patent: 3666111 (1972-05-01), Pielkenrood et al.
patent: 3744634 (1973-07-01), Schlenz
patent: 3746638 (1973-07-01), Gensman et al.

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