Autotrophic Nitrogen Removal from High Strength Ammonia Streams using Anaerobic Ammonium Oxidation - Full Report and Information

The City College of New York recently completed an assessment of a single stage nitritation / Anammox moving bed biofilm reactor (MBBR) to develop design and operational recommendations for full-scale separate centrate treatment for the New York City Department of Environmental Protection (NYCDEP).  This project was funded by NYCDEP and NYSERDA to implement sidestream nitrogen removal using the Anammox process using the MBBR configuration to help reduce energy cost, alkalinity required, eliminate the need for a carbon source, and reduce the production of sludge solids. The operating approach enabled growth of a biofilm on carriers with ammonia oxidizing bacteria (AOB) for “nitritation” on the surface and anammox bacteria in the inner anoxic layers for oxidation of ammonia to nitrogen gas. This coupling of AOB and Anammox bacteria in the biofilm enabled 60-70% N removal from the centrate of the 26th Ward WWTP using the available alkalinity. With supplemental alkalinity, removals in the 80-90% were achieved. The full report of this technology evaluation is available here courtesy of the project sponsors and the team.