The anaerobic oxidation of ammonium

Key physiology of anaerobic ammonium oxidation.

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 n...

Biological Nitrogen Removal Using Anaerobic Ammonium Oxidation

ANaerobic AMMonium OXidation (Anammox) is an efficient microbiological process for the removal of ammonia nitrogen from wastewater. Although several Anammox reactors have been operated successfully in European water pollution control plants, there are challenges associated with the process which must be addressed to ensure dependable performance when treating high strength wastestreams in New Y...

Riverine anaerobic ammonium oxidation across contrasting geologies

Significance of anaerobic ammonium oxidation in the ocean.

A missing link in the nitrogen cycle has recently been found: bacteria capable of oxidizing ammonium to nitrogen gas (N2). This new source of N2 has now been detected in both the water column and the sediments in marine environments. This discovery is important because it necessitates re-evaluation of (1) major fluxes in the global nitrogen budget and (2) regulation of the processes leading to ...

Anaerobic ammonium oxidation with an anode as the electron acceptor.

Anaerobic ammonium oxidation with an anode as the electron acceptor was realized in a dual-chamber microbial electrolysis cell (MEC). Nitrate was the main product that accounted for approximately 95% of ammonium consumed, but nitrite was also detectable. Using 16S ribosomal RNA analysis, we found that the microbial community attached to the electrode was dominated by Nitrosomonas europaea (40.3...