Rotating trickling filter

Details Rotating trickling filter Rotating trickling filter

1977-10-11

1979-07-10

Castel, Benoit

Liquid purification or separation

With gas-liquid surface contact means

210198R, 210 17, 261 92, C02C 104

Patent

active

041607368

ABSTRACT:
There is disclosed a rotating trickling filter formed from an elongated, hollow, circular cylindrical shell in which fixed film contactor media is mounted. Wastewater is introduced through an inlet at one end of the shell and exits through an outlet at the opposite end. The volume of wastewater within the shell is maintained as a small fraction of the total volume within the shell and collects as a shallow pool of wastewater at the bottom of the shell. Longitudinal channels sweep through the pool of wastewater as the shell is rotated to raise wastewater and discharge it over the media, which also rotates with the shell. In one embodiment the shell is cradled on belts, one of which is driven to rotate the shell. In another embodiment, the shell is mounted within a holding tank of wastewater and is driven by the release of gas under pressure from a conduit disposed beneath the shell, with the gas being trapped in cups arranged about the perimeter of the shell.

REFERENCES:
patent: 3325154 (1967-06-01), McDonnell
patent: 3779911 (1973-12-01), Freudenthal et al.
patent: 3827559 (1974-08-01), Gass et al.
patent: 3886074 (1975-05-01), Prosser
patent: 3956127 (1976-05-01), Holmberg

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