AWWA WQTC64060

This study funded by the U.S. Bureau of Reclamation focused on evaluating the viability of capacitive deionization technology (CDT) in water reuse and desalination of methane produced water generated from natural gas fields. The tested water was characterized as brackish groundwater of sodium chloride type with TDS concentration of 5,000 mg/L. The water was also characterized by elevated concentrations of iodide around 55 mg/L. Industrial-scale CDT® aquacells (CDT Systems, Inc., Dallas, Texas) were tested at a gas production site in Montana with focus on fouling/scaling behavior, regeneration effectiveness and desalting efficiency. The effect of operational conditions on the treated water quality, such as applied power, flow rate and staging was examined. The removal efficiencies of specific constituents of interest were identified. The viability of CDT in water reuse and desalination was also assessed with respect of treatment efficiency, operational condition, and operational costs. Includes 5 references.