What Is Anammox Deammonification Treatment Technology？

Anammox deammonification is a biological treatment process that uses a microbial process known as anammox to convert ammonia to nitrogen gas. The process can be an important step in removing nitrogen from wastewater.
The name ‘anammox’ is an abbreviation for anaerobic ammonium oxidation, wherein bacteria, often known as anammox bacteria, convert nitrite and ammonium into nitrogen.
Anammox deammonification is sometimes referred to as simply ‘deammonification.’ The anammox process is involved in only one of the two steps necessary to convert ammonia to nitrogen gas. Deammonification is achieved through two biological processes: partial nitritation and denitritation. Because of this, the entire process can also sometimes be referred to as ‘partial-nitritation/anammox.’
Under partial nitritation, aerobic oxidation turns about half of the ammonia (NH4) to nitrite (NO2). The bacteria performing this oxidation is called autotrophic aerobic ammonia oxidizing bacteria (AerAOB).
Under denitritation, the anammox reaction occurs.  In this step, anammox bacteria oxidizes ammonia into nitrogen gas (N2) and nitrate (NO3), using the nitrite as an electron acceptor.
Anammox deammonification is applied as part of onsite biological treatment. The process can introduce anammox bacteria to wastewater through suspended growth or attached growth systems.