Anammox or AMOX is a common abbreviation for Anaerobic Ammonium Oxidation. Half of the available ammonium is oxidized to nitrite and then directly converted to elemental nitrogen by anammox bacteria (also known as Planctomycetes / AMOX).
The process entails partial nitritation, not nitrification and thus no denitrification (carbon is not required). The process therefore demonstrates the maximum short cut of the nitrogen cycle.
For the treatment of wastewater, this results in enormous savings of energy (about 60%) and operating resources (no carbon required). It is used to treat highly contaminated wastewater (NH₄-N > 600 mg/l).
By means of the EssDe® process, anaerobic nitrogen oxidation has been practiced worldwide for many years and in many large-scale plants.


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