Online process monitoring improves nitrification
Problem: With already high ammonium levels and new compliance limits, the Meander Water Resource Recovery Facility in Mahoning County, Ohio, needed a more reliable solution than once- or twice-weekly grab sample measurements — specifically a new instrumentation and monitoring system with real-time data for ammonium, nitrate and pH — to improve the nitrification process.
Solution: The facility chose the IQ SensorNet from YSI, a Xylem brand. The monitoring system includes an IQSN 2020 controller and VARiON 700 probes with ammonium, nitrate and potassium electrodes, wired into a junction box (MIQ/JB) at the first- and second-stage clarifiers. In addition, a
