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Differential kinetics of ammonia- and nitrite-oxidizing bacteria: A simple kinetic study based on oxygen affinity and proton release during nitrification

Paper ID Volume ID Publish Year Pages File Format Full-Text
36197 45124 2006 9 PDF Available
Title
Differential kinetics of ammonia- and nitrite-oxidizing bacteria: A simple kinetic study based on oxygen affinity and proton release during nitrification
Abstract

The kinetics of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) could be differentiated during simple respirometric and titrimetric assays. The following properties were applied: NOB are more sensitive at low concentrations of oxygen than AOB, and it is only during the ammonium oxidation catalyzed by AOB that protons are released.For the AOB, the saturation coefficients by oxygen (K′AOBK′AOB) and substrate (KsAOB) were found to be 0.99 g O2/m3 and 0.3 g N-NH3/m3, respectively. For the NOB, the saturation coefficients by oxygen (K′NOBK′NOB) and substrate (KsNOB) were found to be 1.4 g O2/m3 and 2.2 × 10−4 g HNO2/m3, respectively.The respirometric and titrimetric assay was a quick and reproducible method for determining kinetic coefficients of nitritation and nitratation separately. Furthermore, through titrimetry, the concentration of ammonia could be evaluated on-line by means of the consumption of a pH-neutralizing solution of Na2CO3 (0.2 M).

Keywords
Respirometry; Titrimetry; Nitrification; Kinetic; Differential kinetics of AOB and NOB
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Differential kinetics of ammonia- and nitrite-oxidizing bacteria: A simple kinetic study based on oxygen affinity and proton release during nitrification
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 8, August 2006, Pages 1764–1772
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Don't Miss Today's Special Offer
Price was $35.95
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