AWWA ACE70796

This powerpoint presentation begins by providing a brief overview of the Long Beach Water Department (LBWD) and its desalination program. Research on fouling control is presented, along with the test impact of blending desalination permeate on corrosion. Conclusions indicate that: generation method for ClO₂ is key; "free chlorine" free ClO₂ have been successfully applied onto PA membranes for 580 ppm-hours without noticeable damage to the membranes; ClO₂ is rejected during the desalination process; the application of chlorine dioxide controlled biofouling in cartridge filter system; post treatment testing facility construction is complete; CI, DI, and steel preconditioning stability; during preconditioning, pipes were superchlorinated and may have destabilized scale; however, more recent data suggest the new scale formation is stronger than previous scale; and, blending studies have begun and will proceed for the next 6 months. Includes tables, figures.