AWWA ACE63171

This slide presentation begins by outlining elements of the Filter Backwash Recycling Rule (FBRR) and goes on to outline how dissolved air flotation (DAF) will achieve compliance with the FBRR. Topics outlined include: settling rate vs. particle size; characteristics of water; Clari-DAF system; major equipment components; the saturation system; dispersion header and nozzles; saturated water; mechanical desludging; hydraulic desludging; pilot data for Williams WTP, Betasso WTP, Morgan WTP, and Lake Pleasant WTP; effects of recycle rate, contact time, loading rates; and, Clari-DAF Sludge Solids. Includes tables, figures.