Record Display for the EPA National Library Catalog


Main Title Filtration of municipal waste with a moving bed contactor /
Author Mixon, Forest O.,
Publisher United States Environmental Protection Agency, Office of Research and Monitoring,
Year Published 1972
Report Number EPA17030-FWH-01 /72; W7212281; EPA/620/R-72/008
OCLC Number 00540668
Subjects Sewage--Purification--Filtration
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 620-R-72-008 Headquarters Library/Washington,DC 04/11/2011
EJBD  EPA 620-R-72-008 c.1 Headquarters Library/Washington,DC 11/04/2013
ELBD  EPA 17030-FWH-01-72 AWBERC Library/Cincinnati,OH 11/04/2011
Collation vii, 51 pages : illustrations, diagrams, chart ; 28 cm.
"January 1972." United States Environmental Protection Agency Contract no. Contract Number: 14-12-895. Includes bibliographical references (page 41).
Contents Notes
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.