The AnammoPAQ® process is an elegant shortcut in the natural nitrogen cycle. The process utilizes Anammox bacteria which directly convert ammonium (NH4+) and nitrite (NO2-) into nitrogen gas. Paques developed the original process for commercial purposes in cooperation with Delft University of Technology and the University of Nijmegen. Since the first full-scale plant started up in 2002 (treatment of sidestream from sludge digestion), many other plants have been installed and are running successfully.
1. Ammonia-rich influent 2. Aerators for mixing and ammonia removal process 3. AnammoPAQ® separator for biomass retention 4. Effluent exits the reactor