A targeted study on possible free ammonia inhibition of Nitrospira. Issue 5 (1st September 2006)

• Record Type: Journal Article
• Authors: Ramey, William D; Simm, R A; Mavinic, Donald S
• Is Part Of: Journal of environmental engineering and science. Volume 5:Issue 5(2006)
• Page Start: 365
• Page End: 376
• Publication Date: 2006-09-01
• Subjects: nitrous acid; -- molecular methods; -- RNA slot blotting; -- fatty acid methyl esters; -- Nitrospira; -- nitrite; -- nitrous oxide; -- Nitrobacter; -- free ammonia inhibition; -- nitrification; -- wastewater treatment; Environmental engineering -- Periodicals; Sanitary engineering -- Periodicals; Environmental engineering -- Canada -- Periodicals; Environnement, Technique de l' -- Périodiques; Technique sanitaire -- Périodiques; Environnement, Technique de l' -- Canada -- Périodiques; Environmental engineering; Sanitary engineering; Canada; Electronic journals; Computer network resources; Periodicals; 628.05
• DOI: 10.1139/s05-044
• Languages: English
• ISSNs: 1496-2551

Abstract

Abstract : Batch tests were carried out with Nitrospira in mixed and pure cultures using concentrations of free ammonia widely believed to be inhibitory to nitrite-oxidizing organisms. The mixed culture batch tests were conducted with mixed liquor from a bench scale completely stirred tank reactor (CSTR) treating a synthetic wastewater having a low C:N ratio. Nitrospira were confirmed as the dominant nitrite oxidizers via RNA slot blotting. Nitrospira moscoviensis were used for the pure culture trials. The results from this study suggest that free ammonia (NH3 -N) concentrations of up to 10 mg/L were not inhibitory to Nitrospira either in situ or in pure culture.