| Main Title |
Single stage nitrification-denitrification / |
| Author |
Bishop, Dolloff F., ;
Heidman, James A. ;
Stamberg., John B.
|
| Other Authors |
|
| 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 |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD |
EPA 670-2-75-051 |
|
Headquarters Library/Washington,DC |
06/10/2015 |
| ELBD ARCHIVE |
EPA 670-2-75-051 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| ELBD |
EPA 670-2-75-051 |
|
AWBERC Library/Cincinnati,OH |
03/01/2021 |
| NTIS |
PB-242 857 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
viii, 29 pages : illustrations ; 27 cm. |
| Abstract |
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. |
| Notes |
"Program element no. 1BB043." Report prepared by the EPA-DC Pilot Plant, Washington, D.C. Includes bibliographical references (pages 27-28). |
