Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Single stage nitrification-denitrification /
Author Bishop, Dolloff F. ; Heidman, James A. ; Stamberg., John B.
Other Authors
Author Title of a Work
Heidman, James A.,
Stamberg, John B.,
CORP Author District of Columbia Dept. of Environmental Services, Washington,;National Environmental Research Center, Cincinnati, Ohio.
Publisher National Environmental Research Center, Office of Research and Development, U.S. Environmental Protection Agency : For sale by the Supt. of Docs., U.S. Govt. Print. Off.,
Year Published 1975
Report Number EPA-670/2-75-051; EPA-68-01-0162; EPA-ROAP-21ASO-026
Stock Number PB-242 857
OCLC Number 01624918
Subjects Sewage--Purification--Activated sludge process. ; Nitrification. ; Sewage disposal plants--Pilot plants.
Additional Subjects Activated sludge process ; Nitrification ; Sewage treatment ; Anaerobic processes ; Nitrosomonas ; Aeration ; Nitrobacter ; Dissolved gases ; Oxygen ; Performance ; Waste water ; Pilot plants ; District of Columbia ; Denitrification ; Dissolved oxygen ; Suspended solids
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 670-2-75-051 Headquarters Library/Washington,DC 05/20/2013
EJBD  EPA 670-2-75-051 Headquarters Library/Washington,DC 06/10/2015
ELBD  EPA 670-2-75-051 AWBERC Library/Cincinnati,OH 03/01/2021
NTIS  PB-242 857 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation viii, 29 pages : illustrations ; 27 cm.
The removal of 75 to 84% of nitrogen from primary wastewaters has recently been achieved in a single stage activated sludge process (30,000 to 50,000 gpd) at the EPA-DC pilot plant in Washington, D. C., without the use of supplemental organic carbon. The removal was achieved in a two pass biological reactor in which the dissolved oxygen concentration was varied from 0 to 2 to 3 mg/1. The air from the blower was applied on a 30-min cycle, first to one reactor pass then to the other pass. Mechanical mixers suspended the mixed liquor solids when the air was not applied to the pass. At a flow measurement ratio of 0.1 gm BOD5/day/gm mixed liquor volatile suspended solids, a mixed culture of carbonaceous (BOD5 removal), nitrifying and denitrifying organisms developed and essentially complete nitrification was achieved. With the dissolved oxygen at two or above, the nitrification readily occurred. When the dissolved oxygen decreased to near zero, denitrification occurred.
"Program element no. 1BB043." Includes bibliographical references (pages 27-28).