Record Display for the EPA National Library Catalog

RECORD NUMBER: 21 OF 70

OLS Field Name OLS Field Data
Main Title Effluent Ammonia Variability from Nitrification Facilities.
Author Rossman, L. A. ;
CORP Author Municipal Environmental Research Lab., Cincinnati, OH.
Year Published 1984
Report Number EPA-600/D-84-139;
Stock Number PB84-196450
Additional Subjects Ammonia ; Sewage treatment ; Nitrification ; Statistical analysis ; Concentration(Composition) ; Trends ; Seasonal variations ; Distributing ; Biological processes
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB84-196450 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 10p
Abstract
A statistical analysis was made on several years worth of daily effluent ammonia concentrations from seven Ohio nitrification plants. Significant seasonal and annual trends were found in six of the plants. The full range of ammonia variability within a season could not generally be fit to any of five commonly used probability distributions. Values above 0.5-1.0 mg/L fit the lognormal or shifted exponential distribution in most cases. Selected exceedance probabilities and concentration percentiles could be related to the overall seasonal mean concentration. These relationships suggested using the exponential distribution as a general model for approximating within-season ammonia variability.