Meeting Dissolved Oxygen Requirements
Water pollution degrades surface waters making them unsafe for drinking, fishing, swimming and other activities. In an effort to improve these waters, stringent discharge limits often are enacted to ensure that water released into the environment (rivers, lakes, ocean, wetlands, etc.) meets strict dissolved oxygen (DO) criteria. Utilities frequently have the added difficulty of keeping DO levels in compliance due to seasonal storm events, unusually high temperatures or treatment plant operational upsets. To meet today’s required DO standards, post-aeration has become a critical process at most wastewater treatment plants.