Kinetic characterisation of an enriched Nitrospira culture with comparison to Nitrobacter

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Richard Blackburne
  • Vel M. Vadivelu
  • Zhiguo Yuan
  • Jürg Keller

Detail(s)

Original languageEnglish
Pages (from-to)3033-3042
Journal / PublicationWater Research
Volume41
Issue number14
Publication statusPublished - Jul 2007
Externally publishedYes

Abstract

Nitrospira and Nitrobacter are nitrite-oxidising bacteria commonly identified in nitrogen removal wastewater treatment plants. Little is known about the growth parameters of Nitrospira or the effects of environmental conditions or inhibitory compounds on Nitrospira activity. These bacterial properties were investigated using an enriched Nitrospira culture and an enriched Nitrobacter culture or Nitrobacter literature values. Compared to Nitrobacter, Nitrospira was found to have a comparable optimal pH range (8.0-8.3); similar normalised activity-temperature relationship (0.44e0.055(T-15)) for temperatures between 15 and 30 °C and a similar oxygen half-saturation constant, KO (0.54±0.14 mg L-1). The major differences identified were that Nitrospira had a lower nitrite half-saturation constant, KS (0.9±0.07 mg NO2-N L-1); lower inhibition threshold concentrations for free ammonia (between 0.04 and 0.08 mg NH3-N L-1) and free nitrous acid (less than 0.03 mg HNO2-N L-1) and a higher yield (0.15±0.04 g VSS g N-1). Therefore, Nitrospira is more likely to dominate nitrite oxidation under conditions with low ammonium and nitrite concentrations, which would provide an advantage to them due to their lower KS value while avoiding any free ammonia or free nitrous acid inhibition. © 2007 Elsevier Ltd. All rights reserved.

Research Area(s)

  • Kinetics, Nitrification, Nitrite-oxidising bacteria, Nitrobacter, Nitrospira, Wastewater treatment, Yield

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Kinetic characterisation of an enriched Nitrospira culture with comparison to Nitrobacter. / Blackburne, Richard; Vadivelu, Vel M.; Yuan, Zhiguo et al.
In: Water Research, Vol. 41, No. 14, 07.2007, p. 3033-3042.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review