Robert Lyle Chapman
Engineers at Ct St, Redding, CA
License number
Colorado 12324
Issued Date
Feb 9, 1974
Renew Date
Nov 19, 1985
Expiration Date
Nov 19, 1985
Type
Professional Engineer
Address
Address
1525 Court St, Redding, CA 96001
Professional information
Apparatus For Pretreatment Of Water Using A Bed Of Granular Activated Carbon
US Patent:
4659462, Apr 21, 1987
Filed:
Oct 24, 1985
Appl. No.:
6/790652
Inventors:
Robert L. Chapman - Redding CA
Assignee:
CH.sub.2 M Hill, Inc. - Corvallis OR
International Classification:
C02F 128, C02F 152
US Classification:
210202
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.