AWWA WQTC69234

This powerpoint presentation begins by presenting study objectives that include the following: develop a dynamic model to predictdistribution system chlorine residual;optimize distribution system chlorine residual;minimize distribution system TTHM level; and,save chemical costs. A brief overview of the Las Vegas Valley Water District (LVVWD) supply and distribution system, and distributed rechlorination system is presented, along with system challenges that include the following: complex distributed chlorination; various convection, dispersion andblending in the distribution systemnetwork; and,complicated chlorine reaction withdifferent materials, chemicals anddeposits. Approach methodology included the following:utilize supervisory control and data acquisition (SCADA) information and LaboratoryInformation Management System (LIMS) data; simplify chlorine model by grouping reactionconstants; calibrate chlorine model using field testscoupled with a Genetic Algorithm (GA)optimization; and,continue model calibration accountingoperation changes or system expansion. Potential benefits include:improved understanding of water qualityvariations in a complex water distributionsystem;ensured adequate residual chlorinethroughout the system;saved chemical costs by optimizingchlorine dose; and, minimized TTHM growth by tracking andreducing bulk chlorine demand throughdaily operations. Includes figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2008

Number of Pages:

26

File Size:

1 file , 2.1 MB