AWWA ACE65406

This powerpoint presentation outlines a RCR Project in Dinuba, California, that used ultraviolet (UV) disinfection application for high quality reclaimed water. The presentation provides information on reclaimed water treatment regulations that include: disinfected tertiary recycled water criteria, according to the California Code of Regulations; NWRI 2003 UV Guidelines and UV design criteria; and, criteria not appropriate, high quality percolated effluent. Topics covered under Reclaimed Water Quality include: Percolation Results in Extremely High UVT; similarity of Turbidity and PSD of Percolated Water; and, Microorganisms - No Detectable MS Phages or Coliforms in Percolated Water. Determination of UV Design Parameters includes a comparison of conventional design costs. UV system selection includes: open channel or in-vessel; performance-based selection; and, Aquionics In-vessel Reactors. Conceptual UV System Design and Costs looks at: UV system design; conceptual layout; and, substantial cost savings. Next steps include: regulatory issues for 60 mJ/cm² dose; 2-log virus removal credit for percolation; bacteriophage method detection limit; Fresno reuse application status; seeking virus credit for SAT from CaDHS; and, in the meantime - irrigation restrictions. Includes tables, figures.