Scum removal system for a sewage settling tank

Details Scum removal system for a sewage settling tank Scum removal system for a sewage settling tank

1976-02-02

1977-10-18

Nozick, Bernard

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Float

210138, 210221R, 210242S, 210525, 210527, 210540, B01D 2102

Patent

active

040545202

ABSTRACT:
A scum removal system for sewage settling tanks and the like employs a floating skimmer system which is lowered onto the surface of the liquid at one end of the tank and then moved toward the opposite end where floating materials collected by the skimmer are passed into a scum trough. At the trough end of the tank, the skimmer is raised from the surface of the liquid and returned to the first end while being held above the liquid surface. Continuous flow into the scum trough is prevented by a floating beach hinged to the scum trough. The beach is submerged as the skimmer approaches so that flow over the submerged beach carries the collected materials into the scum trough. Flow over the submerged beach is controlled by the depth as well as the length of time that the beach is held beneath the surface.

REFERENCES:
patent: 3437212 (1969-04-01), Thorn et al.
patent: 3923661 (1975-12-01), Crisafulli

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