AWWA ACE70974

This powerpoint presentation begins by providing a brief overview of the drivers for considering alternative disinfection methods, and the California Code of Regulations, Title 22 on Approved Disinfection Technologies. A project at a northern California utility is presented, with the project goal of selecting the most suitable disinfection technology through a site-specific alternatives analysis. Disinfection technology criteria included: small footprint; meet or exceed 5-log removal of poliovirus; minimal operator attention; Title 22 approved; proven performance; and, maintain pressure head from membranes. Technologies selected for evaluation included: in-vessel MP UV Disinfection (Aquionics); HiPOx System (Applied Process Technology); and, pasteurization (Pasteurization Technology Group). An evaluation summary of the three technologies is presented, along with life cycle cost comparisons. Conclusions indicate: site specific alternatives analysis is key; UV, ozone, and pasteurization - Title 22 approved, proven disinfectants for various applications; and, costs are similar, though site-specific issues are critical. Includes table, figures.