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2017 Public Works Department Annual Report
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2017 Public Works Department Annual Report
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2017 Annual Report • Public Works Department • St. Anthony Village, Minnesota <br /> <br /> <br /> <br />9 <br /> <br />V. Advanced Oxidation Process Water <br />Treatment Plant <br />The City of St. Anthony completed an addition to its water treatment plant in July 2017 that <br />uses ultraviolet (UV) light technology to remove 1,4-dioxane, an emerging contaminant in the <br />city’s municipal wells. The plant is the first in the state of Minnesota to use UV technology and <br />hydrogen peroxide together. The project was funded with $10.5 million dollars from the <br />Department of the Army in 2016. <br />When added to water in a vendor supplied UV reactor, the hydrogen peroxide absorbs UV light <br />which produces hydroxyl radicals that break down the 1,4-dioxane into non-toxic compounds <br />consisting of carbon dioxide, water, and residual chlorine. The treatment physically destroys <br />and removes dioxane from the environment and does not create other contaminants that <br />require disposal as hazardous materials. <br />During construction, the existing treatment plant facility remained in full operation with little to <br />no disruption to the water treatment process. The two systems were integrated during a two <br />day span, creating the first advanced oxidation water treatment plant for drinking water in <br />Minnesota. A ribbon cutting ceremony open to the public was held in August 2017 to <br />commemorate the completion of the project. A guided tour was provided explaining the <br />entirety of the water treatment process in detail. <br />
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