AWWA WQTC65951

This powerpoint presentation provides a brief overview of the Cleveland Water Division (CWD), and the problem it was having with: low Cl₂ residuals in a portion of thetransmission mains; suspected biofilm issues;distribution system model not suitable forthis arrangement, water age unknown for this small area; and, low flow demands. The approach used included: fluoride tracer study;shut off F- feed at Crown and Morgan Water Treatment Plants (WTPs),maintain at Baldwin WTP;sample strategically;control the variables;draw conclusions from data; and,pipe section sampling considered, butshelved due to cost. Conclusions were that: Independence Pump Station will not put waterinto Brecksville system if the bleeds are open;with bleeders open, 3rd high pushes water backtowards Independence; water from Independence then flows towards Parma;Chlorine Residuals will not increase in Brecksvillesystem as long as bleeders are open as they were inthe study;chlorine residual in 3rd high service near Brecksville islow;a biofilm is quite likely since there has been lowchlorine in system for some time;open or closed, bleeders will cause water quality issues; and,CWD will expend capital dollars to address. Includes figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2007

Number of Pages:

22

File Size:

1 file , 2.4 MB