Liquid purification or separation – With means to add treating material – Plural distinct separators
Patent
1985-10-24
1987-04-21
Cintins, Ivars
Liquid purification or separation
With means to add treating material
Plural distinct separators
210266, 210275, 210661, C02F 128, C02F 152
Patent
active
046594620
ABSTRACT:
A water treatment plant includes a granulated activated carbon bed contactor used in pretreating influent water, including wastewater, 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 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 carbon bed cleaning mechanisms are provided. Furthermore, the contactor has a countercurrent spent carbon removal and fresh carbon introduction system for rejuvenating the bed.
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CH.sub.2 M Hill, Inc.
Cintins Ivars
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