AWWA ACE65470

This powerpoint presentation begins by providing background information on a chromium problem at a Glendale, California, Water Treatment Plant (GWTP). A Four-Phase Program Initiated by Glendale included: Phase I Bench Study, AwwaRF-sponsored study to screen technologies for Cr(VI) removal and evaluate redox chemistry (Brandhuber et al., 2005); Phase II Pilot Study, US Environmental Protection Agency (USEPA)-sponsored study of 6 technologies at pilot-scale (McGuire et al., 2006; Qin et al, 2005); Phase III Demonstration Study, USEPA- and AwwaRF-sponsored Bridge Project, Additional requests for demo. funding; and, Phase IV Full-Scale treatment implementation. Treatment technology evaluation includes: Bridge Project - initial part of the Phase III Demonstration Study; purposes of the Bridge Project including test additional WBA resins, test constant pH conditions, and investigate characteristics of WBA residuals to identify mechanisms of Cr(VI) removal. Treatment technology evaluation and residuals analysis are provided.