In Orrville, Ohio, it’s never business as usual at the wastewater treatment plant. Visitors to the plant’s administration building are treated to a clever first-hand demonstration of the plant’s high-quality effluent. At the main entryway of the building, one might expect to see shrubs, flowers and a manicured lawn. Instead, visitors find an effluent-fed pond, home to some 30 flourishing goldfish and colorful Koi. “It’s a great way for us to demonstrate the high quality of our effluent,” says wastewater superintendent Bob Auten. Something differentThe Orrville plant (design flow 3.2 mgd, average 2.1 mgd) uses a three-stage biological treatment system
