Record Display for the EPA National Library Catalog


Main Title Methods for improvement of trickling filter plant performance: part II : chemical addition.
Author Brown, James Clement, ; Little., Linda W.
Other Authors
Author Title of a Work
Little, Linda West.
CORP Author North Carolina Univ. at Chapel Hill. Dept. of Environmental Sciences and Engineering.;Municipal Environmental Research Lab., Cincinnati, Ohio. Wastewater Research Div.
Publisher U.S. Environmental Protection Agency, Municipal Environmental Research Laboratory,
Year Published 1977
Report Number EPA 600/2-77/012; EPA-14-12-505
Stock Number PB-266 424
OCLC Number 39863933
Subjects Sewage disposal plants ; Sewage--Purification--Activated sludge process ; Sewage--Purification--Biological treatment ; Water--Purification--Biological treatment
Additional Subjects Trickling filters ; Sewage treatment ; Chemical removal(Sewage treatment) ; Phosphorus ; Water pollution control ; Coagulants ; Pilot plants ; Aluminum sulfate ; Performance evaluation ; Sludges ; Experimental design ; Concentration(Composition) ; Design criteria ; Biochemical oxygen demand ; Process charting ; Circulation ; Precipitate(Chemistry) ; Solid wastes ; Chapel Hill(North Carolina)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-2-77-012 Headquarters Library/Washington,DC 12/30/2013
EJBD  EPA 600-2-77-012 Headquarters Library/Washington,DC 04/17/2014
ELBD  EPA 600-2-77-012 AWBERC Library/Cincinnati,OH 11/20/1998
ESAD  EPA 600-2-77-012 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-266 424 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xi, 108 pages : illustrations ; 27 cm.
An experimental program to explore potential methods for removing phosphorus and generally enhancing trickling filter plant performance was conducted at the Mason Farm Wastewater Treatment Plant, Chapel Hill, North Carolina. Preliminary investigations included jar testing with several coagulants and coagulant aids and pilot studies to determine the effect of the point of alum addition on phosphorus removal. Follow-up full-scale studies utilized the Chapel Hill high-rate trickling filter plant which consists of two parallel identical main-stream trains. From January 25 through October 6, 1972, alum was added to the influent of one final clarifier. Alum dosage and influent flow rates to the dosed train were varied and phosphorus removal, general plant performance, sludge production, and sludge digestion performance were monitored. Alum addition effectively removed phosphorus and enhanced overall plant performance. Optimization of alum precipitation will require a flow-paced alum feed system, restriction of average dry weather final settling tank surface loadings to 20.4 cu m/day/sq m (500 gpd/sq ft), and inclusion of tertiary fine solids removal facilities. Alum sludge decreased the alkalinity and pH in the primary anaerobic digester and led to liquid/solids separation problems in the secondary digester. Separate facilities may be necessary for handling alum-humus sludge from the final settling tank.
"EPA-600/2-77-012." EPA contract no. 14-12-505; project no. 11010 DGA. EPA project officer: Richard Brenner. Includes bibliographical references (pages 102-103).
Contents Notes
pt. l. Chemical addition.