The Sun Prairie Wastewater Treatment Facility serves the community of Sun Prairie, one of the fastest growing communities in Wisconsin with a current population at 39,419. The facility meets strict effluent permit limits utilizing BNR activated sludge and anaerobic digestion. The facility treats approximately 4 million gallons of water, produces 90,000 cubic feet of gas, and generates 13 cubic yards of biosolids daily. The facility was originally constructed in 1982 with upgrades in 2002, 2005, and 2022. The most recent upgrade added new horizontal dry pit submersible influent pumps, an additional fine screen and wash press, additional primary clarifiers, primary gravity thickener/fermenter, additional secondary clarifiers, and cloth disc filters. The facility is currently in the design phase for a 2025 upgrade that will address biosolids handling. The future solids handling facility will feature a pre-digestion Class A biosolids process, an ELODE dewatering device, a solar dryer with in floor heat, and pelletizing of the material. After the tour, attendees can gather at the downtown Great Dane Pub & Brewing Company. No shuttle bus will be arranged. Attendees will need to drive or carpool.
