Backflush filter system

Details Backflush filter system Backflush filter system

1976-08-04

1977-07-19

Wyse, Thomas G.

Liquid purification or separation

Recirculation

Of filtrate

210264, 210274, 210279, 210323T, B01D 2324, B01D 2908

Patent

active

040367576

ABSTRACT:
A filter system to follow a primary sewage treatment unit delivering substantially clarified effluent, the filter system having plural vertical filter columns nearly filled with filter aggregate and each column having a vertical stand pipe terminating near the bottom of the column and operative to introduce air to bubble up through the aggregate while the column is having water backflushed through it, and the filter system having a separate path by which backflushed water with the solids entrained therein is returned to the primary treatment unit during backflush purge cycles.

REFERENCES:
patent: 364934 (1887-06-01), Hyatt
patent: 1312041 (1919-08-01), Morison
patent: 2541799 (1951-02-01), White
patent: 2559784 (1951-07-01), Moore
patent: 3547270 (1970-12-01), Kass
patent: 3681236 (1972-08-01), Bergles et al.
patent: 3709364 (1973-01-01), Savage
patent: 3713543 (1973-01-01), Heaney
patent: 3741390 (1973-06-01), Wallace et al.
patent: 3841999 (1974-10-01), Bennett et al.
patent: 3966608 (1976-06-01), Mason et al.

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