The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	The effects of oxygen tension on nitrate reduction by pseudomonas isolate
Author:	Hsing, Hao-Jan
View Online:	njit-etd1991-061 (iii, 30 pages ~ 0.9 MB pdf)
Department:	Department of Chemical Engineering, Chemistry and Environmental Science
Degree:	Master of Science
Program:	Environmental Science
Document Type:	Thesis
Advisory Committee:	Kafkewitz, David (Committee chair) Armenante, Piero M. (Committee member) Trattner, Richard B. (Committee member)
Date:	1991-12
Keywords:	Water -- Purification -- Nitrogen removal Bacteria, Denitrifying Pseudomonas Biochemical oxygen demand
Availability:	Unrestricted
Abstract:	It is a generally accepted concept that nitrate reduction only occurs under anaerobic conditions. Oxygen inhibits denitrification. However many studies of nitrate reduction under low oxygen tension have shown what has been called aerobic denitrification. This project examines the process of aerobic denitrification. Oxgyen affects cell growth and the amount of nitrate utilized. When oxygen is absent, the cell growth rate is lower and nitrate utlization is higher then when oxygen is present. Nitrate is reduced to nirite under anaerobic conditions. Nitrite accumulation did not continue increase. But increased then decreased producing a "Z" shaped graph when plotted.