Merchantville-Pennsauken Water Commission (MPWC) intended to construct activated carbon plants at both their Woodbine Avenue and National Highway Water Treatment Plants (WTPs) for the removal of Perfluorooctanoic acid (PFOA) and Perfluorononanoic acid (PFNA). RVE served as Engineering Consultant responsible for developing and implementing a plan to design a full-scale carbon treatment plant at both the Woodbine Avenue and National Highway WTPs. Woodbine Avenue Water Treatment Plant improvements included the installation of an Advanced Oxidation Process (AOP) using Ultraviolet light and Hydrogen Peroxide to treat 1,4 Dioxane and the installation of a Granular Activated Carbon (GAC) system to treat for PFNA contamination. National Highway Water Treatment Plant improvements included the installation of an AOP using Ultraviolet light and Hydrogen Peroxide to treat 1,4 Dioxane and the installation of a GAC system to treat for per- and polyfluoroalkyl substances (PFAS) contamination. Both upgrades included all necessary treated water and sanitary piping, valves and appurtenances, electrical, instrumentation and controls, connections to the existing system, building modifications, and structural improvements necessary to support the structures.
RVE completed a feasibility study regarding the potential treatment methodologies for each contaminant, examine the potential location for the treatment processes, and develop conceptual layouts for the alternatives
Due to the presence of 1, 4 Dioxane, the treatment using GAC was selected by MPWC such that the GAC would treat the PFOA/PFOS contaminants while quenching any remaining hydrogen peroxide oxidant from the AOP.
During the design phase, the location of the treatment processes was examined. The distribution system hydraulics, well locations, operational requirements and available space required for the treatment process was outlined including the present worth cost analysis for each option.