Liquid purification or separation – Processes – Separating
Patent
1991-12-23
1993-10-12
Drodge, Joseph W.
Liquid purification or separation
Processes
Separating
210274, 210277, 210280, 210290, 210293, 210797, 210798, B01D 4102
Patent
active
052522318
ABSTRACT:
A process for the treatment of water using a granular bed (3) of granular support materials of a volumic mass less than that of the water to be treated. According to this process, each washing cycle comprises interrupting the withdrawal of treated water and stopping the feed of water to be treated in such a manner that the granular bed (3) floats in a given volume VL of water, admitting cleansing air into the reactor for assuring agitation of the floating bed, interrupting the admission of air in order to permit a separation of the granular materials and sediment by their difference in volumic mass, with decantation of said sediment and flotation of said materials, and evacuating the sediments at the base of the reactor as well as the water contained therein for evacuating the granular bed (3).
REFERENCES:
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patent: 3260366 (1966-07-01), Duff et al.
patent: 3631983 (1972-01-01), Mail
patent: 4113613 (1978-09-01), Sekoulov et al.
patent: 4118320 (1978-10-01), Stuart
patent: 4693831 (1987-09-01), Garzonetti
patent: 4719020 (1988-01-01), Elmaleh
patent: 4976873 (1990-12-01), Ross
Drodge Joseph W.
Dutton, Jr. Harold H.
Institut National des Sciences Appliquees de Toulouse
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