Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Rock filters for removal of algae from lagoon effluents /
Author Swanson, Gregory R. ; Williamson, Kenneth J.
Other Authors
Author Title of a Work
Williamson, Kenneth J.
CORP Author Oregon State Univ., Corvallis. Dept. of Civil Engineering.;Municipal Environmental Research Lab., Cincinnati, OH.
Publisher Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ; Available to the public through the National Technical Information Service,
Year Published 1980
Report Number EPA-600/2-80-038; EPA-R-805416
Stock Number PB80-190077
OCLC Number 06541864
Subjects Algae--Control. ; Sewage lagoons. ; Sewage--Purification--Filtration.
Additional Subjects Filtration ; Fluid filters ; Algae ; Water pollution control ; Lagoons(Ponds) ; Rocks ; Cost effectiveness ; Removal ; Settling ; Rates(Per time) ; Mathematical models ; Pilot plants ; Separation ; Field tests ; Oregon ; Veneta(Oregon)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAM  TD753.S8 1980 Region 1 Library/Boston,MA 04/29/2016
EJBD ARCHIVE EPA 600-2-80-038 Headquarters Library/Washington,DC 03/21/2011
EJBD  EPA 600-2-80-038 c.1 Headquarters Library/Washington,DC 01/14/2014
EKAM  EPA 600/2-80-038 Region 4 Library/Atlanta,GA 07/03/1997
EOBD  EPA 600-2-80-038 NEIC Library/Denver,CO 01/28/2000 DISPERSAL
ESAD  EPA 600-2-80-038 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB80-190077 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation x, 79 pages : illustrations, charts ; 28 cm.
The objective of this project was to show that rock filtration was an effective, low cost unit process for removing algae from lagoon effluents and correspondingly upgrading lagoon treatment. Sedimentation is the primary mechanism of algal removal within rock filter. The settling rates of three species of algae common to lagoons were measured as varying from 0.02 to 0.3 m/day, depending on species and temperature. Settling rates of algae from the Veneta, Oregon lagoon were about 0.05 m/day. A mathematical model of the sedimentation mechanism was constructed based on discrete settling theory. A full-scale horizontal flow operating rock filter designed for a maximum hydraulic loading of 0.28 cu m/cu m (1.6 days detention time) located at Veneta, Oregon was evaluated. Weekly average BOD5 and TSS did not exceed 20 mg/l. With improved flow characteristics a pilot scale rock filter achieved similar results for a short period of testing at twice the hydraulic flow.
"Oregon State University." "Wastewater Research Division, Municipal Environmental Research Laboratory." "March 1980." Includes bibliographical references. "Grant no. R-805416."