AWWA JAW34153 Journal AWWA - Optimizing Chloramine Disinfection for the Control of Nitrification

Journal Article by American Water Works Association, 02/01/1993

Lieu, Nancy I.;Wolfe, Roy L.;Means, Edward G. III

Full Description

Previous studies have shown that nitrification of chloraminated drinking water can have deleterious effects on water quality. These studies also showed that the cause of nitrification is the oxidation of ammonia (used to form chloramines) to nitrite by autochthonous nitrifying bacteria. In this study, bench-scale experiments were conducted with fully treated drinking water to determine the optimum chloramine application conditions necessary to prevent nitrification in the distribution system. These experiments examined the survival and regrowth of nitrifying bacteria after exposure to three chloramine dosages, three weight ratios of chlorine to ammonia-nitrogen, three temperatures, and two contact times. The results indicate that the control of ammonia-oxidizing bacteria is highly dependent on temperature. Includes 22 references, table, figures.

Product Details

Edition: Vol. 85 - No. 2 Published: 02/01/1993 Number of Pages: 7 File Size: 1 file , 2 MB