In order to meet the established performance and sustainability objectives, ECT2 designed, fabricated, delivered and installed two groundwater treatment systems, employing the company’s proprietary SORBIXTM RePURE regenerable resin. The treatment system for the FFTA source area was designed and fabricated in two 53-foot shipping containers, and the Southern area treatment system was designed and fabricated inside a single modiﬁed 53-foot shipping container. In addition, a system to enable the regeneration of the SORBIX RePURE resins from both groundwater treatment systems, as well as in an ECT2 surface water treatment system on the Base, was housed in a 40-foot shipping container.
The resin is regenerated using ECT2’s patented technology, which involves a speciality brine ﬂowing through the resin to remove PFAS from the resin beads. Removing PFAS from SORBIX is only possible due to ECT2’s extensive research and the development of the speciality brine. Without the exact brine mixture, PFAS would remain adhered to the resin beads. Following removal of PFAS from SORBIX, the PFAS laden brine is processed through ECT2’s regenerant recovery and SuperloadingTM process. This regeneration process allows SORBIX to be conﬁdently reused rather than sent for subsequent treatment using thermal desorption or landﬁlled for future generations to contend with.
The FFTA treatment system has been operational since July 2018. The regeneration system has been operational since September 2018, and the Southern area treatment system has been operating since April 2019. The groundwater treatment systems manage ﬂows of in excess of 25 L/sec allowing 2.1 million litres of water to be treated daily, and the ability to regenerate resin results in approximately one litre of waste being generated for each one million litres of water treated. By early February 2021, the groundwater treatment systems had treated over 1.3 billion litres of groundwater, and the regeneration system had conducted 36 regenerations of media that would have otherwise been sent offsite for further treatment and disposal.
There have been no exceedances of the established criteria in treated water.