Filtration of municipal waste with a moving bed contactor /

Filtration of municipal waste with a moving bed contactor /

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Bibliographic Details
Author / Creator:Mixon, Forest O.
Imprint:[Washington : Environmental Protection Agency]; for sale by the Supt. of Docs., U.S. Govt. Print. Off, 1972.
Description:vii, 51 p. : ill. ; 28 cm.
Language:English
Series:Water pollution control research series
Water pollution control research series.
Subject:
Sewage -- Purification -- Filtration.
Sewage -- Purification -- Filtration
Format: Print Book
URL for this record:http://pi.lib.uchicago.edu/1001/cat/bib/9377324
Hidden Bibliographic Details
Other authors / contributors:United States. Environmental Protection Agency. Office of Research and Monitoring.
Notes:"17030 FWH 01/72."
Prepared under contract no. 14-12-895.
Bibliography: p. 41.
Summary:A novel moving bed contactor has been used in filtration studies of municipal waste at various stages within a trickling filter plant. Granular, buoyant filter medium is slurried with process feed and introduced to the bottom of a column equipped with lateral retaining screens and filter medium harvesting machinery, both positioned toward the top of the column. Within the column, filter medium rises by buoyancy and forms a porous plug that traps suspended solids from the feed stream. Filtered liquid is removed from the lateral screen, and soiled filter medium is continuously removed from the column top, washed and recycled to the column bottom. The process operates stably and dependably on all feeds tested--raw wastewater, primary clarifier effluent, and trickling filter effluent. Filtration of alum-coagulated feed is less effective than that of untreated feed. Costs of the process, including equipment, power, construction, and amortization, were estimated.
Govt.docs classification:EP 1.16:17030FWH01/72
EP 1.16:17030 FWH 01/72

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