B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
182/9
B01D 15/00 (2006.01) C02F 1/28 (2006.01) C02F 1/52 (2006.01)
Patent
CA 1306421
ABSTRACT OF THE DISCLOSURE A water treatment plant includes a granulated activated carbon bed contactor used in pretreating influent water, including waste water, prior to any filtration of the water in downstream stages of the plant. The contactor is operable either primarily for adsorption purposes or in a dual role for both adsorption and clarification or flocculation purposes to improve performance of downstream filters. In one embodiment, the carbon bed is partially fluidized and expanded by water flowing upwardly through the bed. This fluidization allows the passage of solids through the bed and minimizes the plugging of the bed. The flow rate of water through the bed is adjustable and controllable to establish the degree of solids capture by the bed. Upwash and backwash cleaning mechanisms are provided. Furthermore, the contactor has a countercurrent spent carbon removal and fresh carbon introduction system for rejuvenating the bed.
534082
Ch2m Hill Inc.
Oyen Wiggs Green & Mutala
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