Startup of a partial nitritation-anammox MBBR and the iplementation of pH-based aeration control.



Citation:

Klaus S, Baumler R, Rutherford B, Thesing G, Zhao H, Bott C. Startup of a partial nitritation-anammox MBBR and the iplementation of pH-based aeration control. Water Environment Research 2017;89(6):500-508.

Abstract:

The single-stage deammonification moving bed biofilm reactor (MBBR) is a process for treating high strength nitrogen waste streams. In this process, partial nitritation and anaerobic ammonia oxidation (anammox) occur simultaneously within a biofilm attached to plastic carriers. An existing tank at the James River Treatment Plant (76 ML/d) in Newport News, Virginia was modified to install a sidestream deammonification MBBR process. This was the second sidestream deammonification process in North America and the first MBBR type installation. After 4 months the process achieved greater than 85% ammonia removal at the design loading rate of 2.4 g /m2 ┬Ěd (256 kg /d) signaling the end of startup. Based on observations during startup and process optimization phases, a novel pH-based control system was developed that maximizes ammonium removal and results in stable aeration and effluent alkalinity.