Description
This powerpoint presentation begins by providing a brief overview of Dallas Water Utilities and a case study involving colored water complaints. The study design included monitoring 16 distribution system locations for aperiod of 12 months, and monitoring of parameters that included:pH;disinfection residual; assimilable organic carbon (AOC);biological growth indicators – HPCs;nitrification indicators – Nitrite, Nitrate, AOB; and,corrosion indicators – iron, turbidity. Elements contributing to the cause of colored water were identified as the following:water leaving the treatment plants wasbiologically unstable; biological re-growth,nitrification and lowering of pH in the distribution system; and, the leaching of pipe scale resulted in red water at customer taps. A pilot study of pipe wall/water interactions is presented, along with colored water managementstrategies for treatment plants including enhancedcoagulation, biologicalfiltration, and chlorine/ammoniaratio of 5:1. Recommended colored water treatment strategies for thedistributionsystem included periodicflushing,boosterchlorination, and corrosioninhibitoraddition. Includes tables, figures.
Product Details
- Edition:
- Vol. – No.
- Published:
- 11/01/2008
- Number of Pages:
- 28
- File Size:
- 1 file , 2.1 MB
- Note:
- This product is unavailable in Ukraine, Russia, Belarus
