what is bnr
Biological Nutrient Removal. Biological Nutrient Removal (BNR) is a process used for nitrogen and phosphorus removal from wastewater before it is discharged into surface or ground water.he team of process design experts at Headworks BIO employs advanced modeling and design tools to determine the size, location, and quantity of ActiveCell media for each stage of the process to achieve the desired level of nutrient removal.