Though it certainly can be used as a stand-alone aid, Tetra Tech’s Biological Nutrient Removal (BNR) Troubleshooting Chart is the perfect addition for owners of the new Activated Sludge Troubleshooting Chart who are operating biological nutrient removal facilities.

The chart addresses 34 specific conditions of plant upset typically experienced in the operation of facilities engaged in nitrogen conversion, nitrogen removal, and phosphorus removal through biological means. Like its companion, the BNR Chart has been produced as a laminated 24” x 36” poster, equipped with a dry-erase pen, and accompanied by a searchable digital manual in CD format.

Biological Nutrient Removal Troubleshooting Chart