Background
In 2024, Cyclopure was invited by Kemira to install a DEXSORB pilot system to demonstrate PFAS treatment in drinking water sourced from surface water for Passaic Valley Water Commission (PVWC) at Little Falls WTP in Totowa, New Jersey. The PFAS analysis data prior to the DEXSORB installation showed total PFAS concentrations as high as 34.8 ng/L in the drinking water.
Installation
The DEXSORB pilot system was installed and commissioned receiving a split stream of post-coagulation water. The pilot system consists of two 8-inch diameter Fiberglass Reinforced Plastic (FRP) vessels with a flow rate of 2.2 gpm and a hydraulic loading rate of 6.3 gpm/ft^2. Each vessel is loaded with 27 lbs of DEXSORB media to accommodate an empty bed contact time (EBCT) of 3 minutes per vessel.
Since Installation
The DEXSORB pilot system has been operating continuously for over 10 months since August 2024. The system has provided smooth operation across the dual DEXSORB vessels in lead-lag configuration and over 644,000 gallons of water treated for PFAS since system startup. With the successful pilot demonstration at this site, NJ DEP forwent the “requested side-stream study” and allowed Cyclopure to conduct a full-scale demonstration (i.e., a 100-gpm system) under Temporary Treatment Approval at a nearby WTP for PVWC.
