title: Key physiology of anaerobic ammonium oxidation.
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.
authors.affiliation: Department of Biotechnology, Delft University of Technology, 2628 BC Delft, The Netherlands.
authors.forename: M
authors.initials: M
authors.lastname: Strous
authors.forename: J G
authors.initials: JG
authors.lastname: Kuenen
authors.forename: M S
authors.initials: MS
authors.lastname: Jetten
mesh_terms: D000641:Ammonia / Q000378:metabolism*; D001421:Bacteria, Anaerobic / Q000254:growth & development / Q000378:metabolism*; D019149:Bioreactors; D006863:Hydrogen-Ion Concentration; D009573:Nitrites / Q000378:metabolism; D010084:Oxidation-Reduction; D013696:Temperature
chemical_list: D009573:Nitrites; D000641:Ammonia