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Nutrient Removal Remedies: Troubleshooting BNR Processes Requires a Holistic Review

Nutrient Removal Remedies: Troubleshooting BNR Processes Requires a Holistic Review

Stone, E., Walker, S., Reardon, R., and Pretorius, C.
Published In: 
WE&T Water Environment and Technology,  
April 2015

Most water resource recovery facilities (WRRFs) using biological nutrient removal (BNR) processes are required by permit to reduce significantly the total nitrogen (TN) and total phosphorus (TP) concentrations discharged in reclaimed water. Consistently meeting low permit limits for nutrients can sometimes challenge even the most experienced facility personnel. Optimizing TN and TP removal requires an understanding of the chemical species of each nutrient, their expected concentrations throughout the process, the basic concepts of the processes designed to reduce them, and the interaction of components within the treatment facility. Having knowledge of process controls, and understanding how to apply them to daily facility operations, is essential for achieving low concentrations of nutrients — and doing so consistently.

Stone, E., Walker, S., Reardon, R., and Pretorius, C. "Nutrient Removal Remedies: Troubleshooting BNR Processes Requires a Holistic Review." WE&T Water Environment and Technology, Volume 27, Number 4, pp: 42, 2015.