AWWA ACE68714

This powerpoint presentation begins by presenting an outline of an evaluation of biological treatment and membrane bioreactors (MBRs). Hybrid Adsorption Membrane Biological Reactors (HAMBgRs) are presented, along with the application of HAMBgRs to Perchlorate Removal, and Perchlorate Treatment Process Options. Key questions addressed in the presentation for HAMBgR process include: how well does I-X resin attenuate shock loads and biological reactor upsets; how well does the I-X Resin regenerate biologically; what is the effect of the resin on biological degradation rates; and, what are the resin effects on membrane fouling related to reduced fouling via foulant adsorption on resin and less dense cake structure? Presentation conclusions indicate that: HAMBgR process mitigates key weaknesses of conventional biological and ion exchange treatment systems; stabilizes reactor performance under changing conditions; avoids brine generation and disposal issues; resin biological regeneration appears to be sufficient for long-term operation; occasional brine cleaning may extend useful life; performance of an MBR can be enhanced by adding an ion exchange resin; and, higher net degradation rates. Includes figures.