Record Display for the EPA National Library Catalog

RECORD NUMBER: 25 OF 36

Main Title Municipal Sewage Treatment with a Rotating Biological Contactor /
CORP Author Allis-Chalmers Mfg. Co., Milwaukee, Wis. Research Div.
Publisher Allis-Chalmers, Research Division,
Year Published 1969
Report Number PB-201 701
Stock Number PB-201 701
OCLC Number 976002768
Subjects Sewage--Purification--Research ; Sewage disposal--Wisconsin--Pewaukee
Additional Subjects ( Sewage treatment ; Contactors) ; Biochemical oxygen demand ; Microorganisms ; Nitrogen ; Phosphorus ; Particles ; Clarification ;
Holdings
Library Call Number Additional Info Location Last
Modified		 Checkout
Status
ELBD RPS EPA 950-K-69-002 repository copy AWBERC Library/Cincinnati,OH 03/22/2017
NTIS  PB-201 701 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 66 unnumbered pages : illustrations, charts, photographs ; 28 cm
Abstract
The Milwaukee Metropolitan Sewerage Commission installed a rotating biological contactor (RBC) to treat municipal sewage. The RBC obtained in excess of 90% BOD removal at loading rates of 350 to 400 lbs COD per day per 1000 cu. ft. of disc volume. Nitrogen was shown to be removed in a ratio of 1:25, nitrogen to COD. Percent BOD removal was consistently 5% greater than percent COD removal. Treatment efficiency was increased with increased detention time, and decreased by: (1) lower disc speed; (2) lower strength wastes; and (3) high hydraulic loading. Recovery from periods of high hydraulic loading was extremely quick. Further planned investigations included isolation and identification of individual species of microorganisms and comparison with the microorganisms of activated sludge and trickling filters. (WRSIC abstract)
Notes
"May, 1969." "Contract No. 14-12-24 - Modification No. 2." "EPA grant no. S802905. EPA project officer: Robert L. Bunch."
Contents Notes
The Milwaukee Metropolitan Sewerage Commission installed a rotating biological contactor (RBC) to treat municipal sewage. The RBC obtained in excess of 90% BOD removal at loading rates of 350 to 400 lbs COD per day per 1000 cu. ft. of disc volume. Nitrogen was shown to be removed in a ratio of 1:25, nitrogen to COD. Percent BOD removal was consistently 5% greater than percent COD removal. Treatment efficiency was increased with increased detention time, and decreased by: (1) lower disc speed; (2) lower strength wastes; and (3) high hydraulic loading. Recovery from periods of high hydraulic loading was extremely quick. Further planned investigations included isolation and identification of individual species of microorganisms and comparison with the microorganisms of activated sludge and trickling filters. (WRSIC abstract)