Apparatus for and method of automatically cleaning an obstructed

Details Apparatus for and method of automatically cleaning an obstructed Apparatus for and method of automatically cleaning an obstructed

1975-11-17

1976-11-16

Schwadron, Martin P.

Fluid handling

Processes

Cleaning, repairing, or assembling

137238, 1374875, 13762411, F16K 5100

Patent

active

039917819

ABSTRACT:
Waste water containing particulate matter is saturated with air or other gas by a dynamic mixer and ejected into a gravity filter system at a point above the filter media but below the water surface level. Upon entering the filter tank, the dissolved gas is released, forming small bubbles on filterable particles to float these particles to the surface for removal. The system further includes a back pressure valve at the sewage inlet port which, if obstructed, is automatically flushed. During the backwash cycle, the water level above the filter bed may be lowered to the level of a wash-through zone, and filtered water then pumped upward through the filter media, thereby carrying particles from the filter media out through the wash-through zone.

REFERENCES:
patent: 3385522 (1968-05-01), Kock
patent: 3433245 (1969-03-01), Cymbalisty

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