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AWWA WQTC71343
- Water Quality Analysis Related to Finished Water Mixing and Disinfectant Byproduct Concentration in Water Storage Tanks: Preliminary Report
- Conference Proceeding by American Water Works Association, 11/01/2009
- Publisher: AWWA
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The Birmingham Water Works Board (BWWB) is taking a proactive approach in anticipating the impending, stricter Stage 2DBP Rule requirements. The BWWB has implemented over twenty studies involvingDBP compliance. This study examines potential DBP formation in finished waterstorage tanks.The degradation of finished water in storage tanks is of great concern to water utilities. Itis widely assumed that tank mixing enhances water quality, and slows the creation ofDBPs. The BWWB is conducting a study, which examines the correlation betweenmixing and water age to DBP production. Ten storage tanks scattered throughout the distributionsystem, equipped with mixing devices, were sampled for residual chlorine, HAAs, andTTHMs at varying heights. The fact that no tankshowed a variation in temperature top to bottom of greater than 1.5 degrees couldindicate proper mixing or an equalization of temperature as the sample traveled to thespigot. The second part of this study dealt directly with tank water temperature variationstop to bottom as measured by sensors located in a tank. Includes 4 references, table, figure, extended abstract only.
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