Record Display for the EPA National Library Catalog

RECORD NUMBER: 21 OF 35

OLS Field Name OLS Field Data
Main Title Nitrogen Removal by Ammonia Stripping.
Author O'Farrel, Thomas P. ; Bisho, Dolloff F. ; Casse, Alan F. ;
CORP Author District of Columbia Dept. of Environmental Services, Washington, D.C.
Year Published 1973
Report Number DI-14-12-818; EPA-11010-EYM; 06842,; 670/2-73-040
Stock Number PB-231 371
Additional Subjects Sewage treatment ; Nitrogen ; Calcium oxides ; Cooling towers ; Calcium carbonates ; Temperature ; pH ; Mathematical models ; Scaling ; District of Columbia ; Ammonia stripping ; Denitrification ; Secondary sewage treatment ; Air stripping
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-231 371 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 32p
Abstract
Ammonia removals of up to 90% from lime clarified filtered wastewater were obtained in a five stage counter current cross flow stripping tower. Decreases in operating temperatures from 78F to 43F during the cold weather reduced the stripping efficiency by 30% and caused icing in the tower. The variation of stripping efficiency was also studied as a function of the inlet pH of the water and the ratio of the air to liquid rate. The rate of calcium carbonate scaling on the tower was determined for wastewater pH's of 11.5 and 10.5. The heights of transfer units (HTU) were estimated by using a mathematical model and a computer iterative technique. (Modified author abstract)