Occurrence and Impact of Simultaneous Nitrification/Denitrification (SND) in BNR Processes (Request for Proposals)

Description: Occurrence and impact of simultaneous nitrification/denitrification (SND) in BNR processes. Project objectives; establish a definition of "successful" simultaneous nitrification/denitrification (SND) based on a compilation of published and unpublished datasets. Develop a framework for where SND has worked and where it has struggled; identify and characterize the operational, physical, and biological conditions that promote or inhibit SND occurrence at full-scale water resource recovery facilities (WRRFs). This should include an evaluation of the microbial community and the impact of different carbon sources on SND performance. Assess current modeling capabilities using commonly used modeling software for accuracy and limitations in SND prediction versus current operations. Provide recommendations for modeling improvements and calibration approaches.