Case Study

IFAS System Doubles Ammonia Removal Capacity

Source: Brentwood Industries, Inc.
IFAS System Doubles Ammonia Removal Capacity

In August of 2007, the Michigan Department of Environmental Quality issued seasonal ammonia discharge limits for the Coldwater Wastewater Treatment Plant (WWTP), which included a daily maximum ammonia concentration of 2.0 mg/L between the months of May and November. The WWTP began to routinely exceed the new limits in the spring and summer of 2008, and as a result, the Coldwater Board of Public Utilities (CBPU) hired an engineering firm — Fishbeck, Thompson, Carr & Huber (FTC&H) — to investigate possible upgrades to the facility that would ensure compliance.