Results · Technical white paper
CAST Treatment Technology White Paper
June 2025 · Non-confidential · CAST pretreatment for PFAS programs (ECT2 / Onterris RSSCT context). You are still on flotration.com — Results, Home, or Docs stay available.
What this paper covers
Technical narrative on CAST as pretreatment ahead of ion exchange for PFAS programs: experimental context, performance discussion, and implications for media life and program economics. CAST is not described as a standalone PFAS-removal technology; the public evaluation isolates the pretreatment effect on breakthrough and column pressure in a CAST-plus-IX train.
- Role of CAST: upstream pretreatment that reduces fouling load on downstream media — often the largest recurring cost in PFAS trains.
- Evidence base: independent RSSCT by ECT2 (now Onterris) with and without CAST ahead of Dow PSR2+ resin; targets aligned with USEPA MCLs (e.g. 4 ng/L PFOS / PFOA).
- Headline result: PFOS breakthrough delayed from under about 1,619 bed volumes without CAST to about 13,767 with CAST pretreatment — more than eightfold longer media run life in that test design (CAST-plus-IX effect, not CAST alone).
- Use: non-confidential for general distribution · full laboratory report available on request for qualified evaluation · site performance confirmed in a paid pilot on your matrix.
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