Problem: When the wastewater treatment plant for the city of Madison, Indiana, received a new phosphorus limit of 1.0 ppm, the staff of 12 assessed the plant’s treatment processes and determined that biological reduction alone wouldn’t be enough to meet the new limit.
Solution: The decision was made to add a chemical-feed program to the process. Since frequent rain events increase flow but dilute the concentration of phosphorus entering the plant, plant leadership ruled out flow-based feeds. They instead selected a ChemScan mini oP Analyzer from In-Situ for its large, blockage-resistant sample tubing, internal self-cleaning features and low cost of ownership.
