AWWA JAW70393

Water utilities must ensure that adequate residualconcentrations of secondary disinfectants persistthroughout the distribution system to preventbacterial regrowth. To predict disinfectant concentrations,a utility must use a combination of modelingand water quality field sampling, which isexpensive. The need for sampling can be reduced ifa utility has a more robust water quality modelingcapacity. This study extends the understanding ofthe rate of chloramine decay in the distributionsystem, enabling utilities to make better predictionsof chloramine residuals and, perhaps, to reduce theamount of costly sampling required.This research demonstrates that a simple, inexpensivenew lab method, the pipe section reactor,can be used to systematically study the rate of disinfectantdecay in various pipe materials and waterquality conditions. In addition, this study provideskinetic models that can be used to predict chloraminedecay rates in all distribution systems. Includes 25 references, tables, figures.

Product Details

Edition:

Vol. 101 - No. 7

Published:

07/01/2009

Number of Pages:

12

File Size:

1 file , 950 KB