Merrill Wastewater Treatment Facility

Merrill Wastewater Treatment Facility is a facility located in Merrill, Wisconsin. The facility employs 2 people and generates $2.5 million in annual revenue. This treatment facility provides conventional activated sludge treatment, including primary settling and biological secondary treatment. The process begins with primary settling and waste activated sludge being pumped to anaerobic digesters where it is digested and stabilized. The facility has undergone several upgrades throughout its history. Initial construction began in the early 1950s, followed by an upgrade in the 1970s that included the addition of the activated sludge process, gravity thickener, and disinfection. Further improvements in the late 1980s and early 1990s involved anaerobic digestion, belt filter presses, sludge storage facilities, and chemical phosphorus removal. Currently, the facility is testing a full-scale biological phosphorus removal pilot project. For more information about Merrill Wastewater Treatment Facility, please visit their website at ci.merrill.wi.us.