Main Title |
Nitrification and Denitrification of Waste Water. |
Author |
Johnso, Walter K. ;
Vani, George B. ;
|
CORP Author |
Minnesota Univ., Minneapolis. Sanitary Engineering Div. |
Year Published |
1971 |
Report Number |
Sanitary Engineering-175-S; FWQA-WP-01028; FWQA-17010-FMX; 11792,; 17010-FMX-01/71 |
Stock Number |
PB-202 350 |
Additional Subjects |
( Chemical removal(Sewage treatment) ;
Nitrates) ;
( Sewage treatment ;
Denitration) ;
( Nitrification ;
Sewage treatment) ;
( Activated sludge treatment ;
Denitration) ;
Aeration ;
Biochemical oxygen demand ;
Flow rate ;
Process control ;
Kinetics ;
Tests ;
Metabolism ;
Carbon ;
Water pollution control
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-202 350 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
171p |
Abstract |
The report discusses denitrification of waste water. The denitrification was accomplished by continuous flow reactor, a gravity solids-liquid separator, and sludge recycle. A portion of the raw waste-water was added as an external carbon source. By operating two completely mixed biological reactors in series it was possible to accomplish both nitrification and denitrification. Aeration times of 7-9 hours were used to produce a completely nitrified effluent at temperatures as low as 10-12C. Denitrification was accomplished with a 1.3 hour mean reaction tank detention time at 20C and in 2.6 hours at 10C. Effluent ammonia nitrogen was that amount which was added to provide a carbon source. Therefore, addition of wastes with little or no ammonia nitrogen as a carbon source would produce an effluent nearly devoid of ammonia nitrogen. The BOD to nitrogen ratio was shown to be the critical parameter, inasmuch as high ratios would produce a high effluent carbon content, and low ratios resulted in complete denitrification. Keeping the ratio constant resulted in an effluent nitrogen concentration well below 1.0 mg/1. By this same analysis, the rate of nitrate reduction was shown to be a linear function of the sludge loading rate. (WRSIC abstract) |
NTIS Title Notes |
Final rept.. |
PUB Date Free Form |
1 Jan 71, |
Category Codes |
13B; 68D |
NTIS Prices |
PC A08 MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
326520607 |
Origin |
NTIS |
Type |
CAT |