Process and apparatus for high rate upflow water filtration...

Details Process and apparatus for high rate upflow water filtration... Process and apparatus for high rate upflow water filtration...

B - Operations, Transporting

01

D

182/26, 182/98

B01D 36/04 (2006.01) B01D 24/00 (2006.01) B01D 24/16 (2006.01) B01D 24/26 (2006.01)

Patent

CA 1191794

ABSTRACT OF THE DISCLOSURE High rate upflow filtration is conducted using a bed of buoyant media in a filter vessel unobstructed by cross-sectional, media-confining screens. A horizontal trough structure collects filter effluent and makes it possible to clean the bed by diffusing air into the liquid below the bed so that average fluid density in the bed is reduced. The reduction in fluid density results in expansion of the bed as media particles descend by gravity.

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