Nitrifying Organism Concentration and Activity

by Embar G. Srinath, Staff Research Chemist; Union Carbide Corp., Tonawanda, N.Y.; formerly, Research Assoc., Dept. of Agr. Engrg., Cornell Univ., N.Y.,
Tata B.S. Prakasam, Project Mgr.; Research and Development Div., Metropolitan San. Dist. of Greater Chicago, Chicago, Ill.; formerly, Sr. Research Assoc., Dept. of Agr. Engrg., Cornell Univ., Ithaca, N.Y.,
Raymond C. Loehr, (M.ASCE), Dir.; Environmental Studies Program, Coll. of Agr. and Life Sci., and Prof., Dept. of Civ. and Agr. Engrg., Cornell Univ., Ithaca, N.Y.,


Serial Information: Journal of the Environmental Engineering Division, 1976, Vol. 102, Issue 2, Pg. 449-469


Document Type: Journal Paper

Abstract: A technique for estimating the concentration and activity of nitrifying microorganisms was developed. The oxidation rates of the nitrifying organisms were not affected by substrate concentration and followed zero-order kinetics. The rates were influenced by pH and the pH optima were in the range of 7.4-7.9. The concentration of nitrifying organisms influenced the oxidation rates. The steps to be followed in using the technique are presented. The technique appears to have promise as an aid for better design and operation of nitrifying processes.

Subject Headings: Oxidation | pH | Microbes | Substrates | Kinetics

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