Pilot Testing of Nitrate Treatment Processes with Minimal Brine Waste

Jul 11, 2019
This webcast discussed Pilot Testing Nitrate Treatment Processes with Minimal Brine Waste (project 4578).  The project independently evaluated emerging technologies (biological and electrochemical denitrification) to cost effectively treat nitrate in groundwater, while reducing waste streams and optimizing spent brine recycling. Current treatment technologies can alleviate the fundamental problem (i.e., reduce nitrate concentration in drinking water), but often create significant waste streams, which must be managed. Utilities that require nitrate treatment to meet regulatory compliance requirements will be provided with better understanding and guidance to assess the applicability of these technologies to their own conditions. Pilot testing was conducted at the City of Avondale, Arizona, which has experienced regulatory and operational challenges due to elevated nitrate and co-occurring chromium in groundwater, including waste disposal concerns associated with spent brine and excess waste stream production. Since the City relies on groundwater exclusively, nitrate treatment is a high priority to ensure a safe and reliable potable water supply that complies with the regulations and water quality goals.