Key physiology of anaerobic ammonium oxidation

Appl Environ Microbiol. 1999 Jul;65(7):3248-50. doi: 10.1128/AEM.65.7.3248-3250.1999.

Abstract

The physiology of anaerobic ammonium oxidizing (anammox) aggregates grown in a sequencing batch reactor was investigated quantitatively. The physiological pH and temperature ranges were 6.7 to 8.3 and 20 to 43 degrees C, respectively. The affinity constants for the substrates ammonium and nitrite were each less than 0.1 mg of nitrogen per liter. The anammox process was completely inhibited by nitrite concentrations higher than 0.1 g of nitrogen per liter. Addition of trace amounts of either of the anammox intermediates (1. 4 mg of nitrogen per liter of hydrazine or 0.7 mg of nitrogen per liter of hydroxylamine) restored activity completely.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Ammonia / metabolism*
  • Bacteria, Anaerobic / growth & development
  • Bacteria, Anaerobic / metabolism*
  • Bioreactors
  • Hydrogen-Ion Concentration
  • Nitrites / metabolism
  • Oxidation-Reduction
  • Temperature

Substances

  • Nitrites
  • Ammonia