Aerated grit tank

Details Aerated grit tank Aerated grit tank

1982-09-30

1987-06-02

Fisher, Richard V.

Liquid purification or separation

With means to add treating material

With distinct reactor tank, trough or compartment

210220, 210525, 210526, 2105321, 261 77, 261123, B01D 2300

Patent

active

046701427

ABSTRACT:
An aerated grit tank is provided having a longitudinally extending control wall dividing the tank into parallel lift and settling chambers. An air discharge apparatus is provided at the bottom of the lift chamber to induce an upward flow of sewage causing a generally helical flow of sewage around the control wall. The control wall is supported in the tank by mechanisms selectively operable to vertically position the wall with a bottom longitudinally extending edge in predetermined spaced relationship to a bottom floor of the tank whereby the velocity of the cross currents may be effectively controlled. One form of the structure has a single control wall unit while a second form of the invention has two wall forming panels with an uppermost panel supported in fixed relationship to the tank and a lowermost panel supported for vertical displacement.

REFERENCES:
patent: 2537904 (1951-01-01), McAllister
patent: 2708520 (1955-05-01), Dallas
patent: 2826306 (1958-03-01), Burns
patent: 3215276 (1965-11-01), Lind et al.
patent: 3244280 (1966-04-01), Lind et al.
patent: 3456798 (1969-07-01), Urdanoff
patent: 3768657 (1973-10-01), Hoag
patent: 4123365 (1978-10-01), Middelbeek
patent: 4192747 (1980-03-01), Wykoff
patent: 4243527 (1981-01-01), Leonard

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