AWWA DSS65663

Aging water in distribution system storage facilities can have a detrimental impact on the qualityof water delivered to customers. Excess water age can result in increased disinfection byproduct(DBP) formation and loss of chlorine residual. Utilities that use chloramination for finaldisinfection in efforts to minimize DBP formation often experience nitrification events in storagefacilities as a result of extended water age.This paper presents a review of the types of typical distribution system storage facilities and thefactors that influence the selection of storage facilities. It summarizes several case reports ofdistribution system water quality issues that have recently been reported in professionalpublications. The results from recent extended period simulation (EPS) water age and sourcetrace analyses which were used to evaluate the impact of the operation, type, and location ofstorage facilities on distribution system water quality for a sample pressure zone are presented.These EPS analyses results show the relative impact that type and location of a storage facilitycan have on water quality in the distribution system. Includes 6 references, figures.

Product Details

Edition:

Vol. - No.

Published:

09/01/2007

Number of Pages:

21

File Size:

1 file , 5.2 MB