AWWA WQTC69426

This powerpoint presentation begins by providing a brief overview of Stage 2 DBP Rule Compliance, focusing on activated carbon, and granular activated carbon (GAC) filter adsorbers. A brief utility profile is presented of the Mohawk Valley Water Authority, along with potential GAC implementation strategies and preliminary filter performance and costs estimates. GAC Filter Adsorber Evaluations included bench tests using RSSCT to confirm viability of yearly changeout, and pilot tests to: confirm TOC and turbidity removal performance of mono- and dual-media filter adsorbers; gather additional SDS data (to better define TOC target); determine the TOC removal impact(s) of biological activity; and, gain New York State Department of Health approval for implementing GAC filter adsorbers at the Hinckley Plant. Presentation summary includes the following: under the right circumstances, GAC filter adsorbers can be an effective Stage 2 compliance strategy; much less expensive than post-filter contactors; avoid potential unintended consequences w/chloramines; MVWA Strategy - enhanced TOC removal for limited period; limited biological removal; mono-media vs. dual-media; backwashing of initial fines into lagoons; and, volatility of GAC market. Includes tables, figures.