AWWA ACE68962
Controlling the Blend of Chlorinated and Chloraminated Source Waters: Case Studies from Two Southern California Utilities
Conference Proceeding by American Water Works Association , 11/01/2008
Blute, Nicole K.; McGuire, Michael J.; Russell, Caroline; Wu, Ying; Bernosky, Joseph; Vilander, Jerry
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This powerpoint presentation begins by providing a brief overview of chloramine chemistry and water quality issues that can arise from nitrification. The impact of source water blending on nitrification is presented, along with a brief overview of case studies at Western Municipal Water District (WMWD) and at the City of La Habra. Presentation summary and conclusions indicate the following: WMWD concluded that chloramination of their
Murrieta wells would allow maximum operational
flexibility throughout the year;
La Habra did not observe significant nitrification in the
system, likely due to wintertime free chlorination (i.e.,
burnout); and,
considerations for utilities blending chlorinated and
chloraminated source waters include location of blending - reservoir/tank or pipeline, seasonal water usage - natural free Cl<sub>2</sub> burnout periods, and disinfection byproduct (DBP) formation potential and possibility of breakpoint
chlorination. Includes tables, figures.
