We are providing engineering design services for a new 12.5mgd regional water treatment plant that will replace existing water treatment plants in Braintree, Holbrook, and Randolph, Massachusetts.
When water treatment plants (WTP) in three communities needed upgrading and PFAS was found in the source and treated water, the Tri-Town Water Commission decided to replace the three existing plants with a new 12.5 MGD plant – the Tri-Town Regional WTP.
Our approach
We are providing engineering design and architectural services for the new plant that will be located adjacent to the existing facility in Braintree.
To ensure the new plant will be capable of reducing the PFAS concentrations to compliance levels, we conducted analysis and performed pilot testing of treatment technologies. Our in-house laboratory services evaluated various granular active carbon filter medias and reviewed filter sizing to satisfy Massachusetts Department of Environmental Protection’s requirements for the removal of PFAS. In parallel, we performed separate rapid small-scale column tests that assessed the performance of a targeted novel adsorbent media using the same filtered water.
Outcome
Our analyses resulted in the PFAS selected adsorbent being chosen as the preferred media due to its superior performance to granular activated carbon. Further, its characteristics would result in smaller vessel footprint, fewer media changeouts and lower lifecycle costs.