Henderson, Katie

Presented at WEFTEC 2023.

Titles from this speaker

Description: Electrochemical Oxidation for PFAS Destruction: A Municipal Drinking Water Utility...

Electrochemical Oxidation for PFAS Destruction: A Municipal Drinking Water Utility Case Study

Abstract

Electro-oxidation (EO) provides a method to mineralize Per- and Polyfluoroalkyl Substances (PFAS) compounds, eliminating them forever. Demonstration studies for destruction of PFAS have been successfully conducted on highly concentrated waste streams, such as AFFF and landfill leachate, but most drinking water treatment plants in the US will experience lower concentrations of PFAS contaminations. In this study, conducted at a water treatment plant on surface water with PFAS concentrations in the parts per trillion range, Reverse Osmosis (RO), Foam Fractionation (FF), and Ion Exchange were used as means to remove and concentrate PFAS followed by EO. Using a concentration process prior to the EO process reduces the liquid volume needing treatment and improves energy and destruction efficiency of EO by orders of magnitude thereby reducing overall costs. The study investigated destruction of PFAS on the RO concentrate, foamate, and IX brine regenerant, including sampling and analysis of byproduct formation and transformation of PFAS compounds from longer chains to shorter chains.

Electro-oxidation (E) provides a method to mineralize Per- and Polyfluoroalkyl Substances (PFAS) compounds and a promising technology for onsite PFAS destruction. In this EO pilot study, conducted at a water treatment plant with PFAS in the ppt range, a treatment approach where PFAS is first removed and concentrated with other technologies prior to destruction and followed EO by polishing with adsorption media.

SpeakerHenderson, Katie

Presentation time

14:00:00

14:20:00

Session time

13:30:00

15:00:00

SessionMaking Forever Chemicals Gone Forever

Session locationRoom S405- Level 4

TopicAdvanced Level, Microconstituents and Contaminants of Emerging Concern (Non-PFAS), PFAS, Research and Innovation, Water Reuse and Reclamation

Author(s)

Henderson, Katie

Author(s)K. Henderson 1; M. Machacek 2 ; T. Leland 3; J. Slater 4; I. Ben Salah 4; M. Laaroussi 4; A. Galvan 5; K. Henderson 1;

Author affiliation(s)Ovivo USA 1; Ovivo USA 2 ; Ovivo 3; West Morgan East Lawrence Water and Sewer Authority 4; E2metrix 4; E2metrix 4; Ovivo USA 5; 1;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2023

DOI10.2175/193864718825159093

Volume / Issue

Content sourceWEFTEC

Word count13