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NEW BRIGHTON: ADVANCED OXIDATION PROCESS PILOT EVALUATION AND FINAL DESIGN FOR 1,4-DIOXANE REMOVAL FROM GROUNDWATER
Ling, A. and J. Macejkovic. | World Environmental and Water Resources Congress, 3-7 June, Minneapolis, Minnesota, 30 slides, 2018

Elevated 1,4-dioxane concentrations were discovered in New Brighton's groundwater supply wells in 2014, likely sourced from the nearby Twin Cities Army Ammunition Plant. To remediate contamination, an existing plant was upgraded. A 6-month pilot test evaluated 2 advanced oxidation process systems: low-pressure UV/peroxide, and ozone/peroxide. While both treated dioxane to <0.1 µg/L and would affect current treatment plant operations, the ozone/peroxide system was eliminated after it produced elevated bromate concentrations in the system effluent. A UV/peroxide system was designed in 2017, and plant start-up occurred in fall 2018. See presentation for more information http://rpic-ibic.ca/images/2019_FCSRW/presentations/14-Dioxane_Removal_in_Municipal_Water_Supply_Impacted_by_Off-Site_Groundwater_Contamination_.pdf



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