Description
This powerpoint presentation begins by presenting study objectives that include the following: to investigate how low-level intrusions,from different sources, impact thechlorine and chloramine residuals,and the potential for microorganismsurvival; and,if water is intruded through a leakafter a low-pressure event, determine if microbialsurvival may be enhanced if thematrix exerts a disinfectant demand. Batch disinfection kinetics studieswere conducted in continuously-mixed500 mL glass reactors(maintained at 10ºC). Study conclusions indicate the following:understanding matrix characteristics is important fordetermining the significance of a low-level intrusion, thehigher the total organic carbon (TOC), the greater the potential to impactdisinfection residuals;free chlorine residuals are more sensitive to wastewaterintrusion than chloramine residuals, 0.1% intrusion ofsewage caused up to 50% decrease (instantaneous) inchlorine residuals but did not impact chloramine residuals; maintenance of a disinfectant residual provides aprotective barrier against low-level intrusions, and microbialrisk assessments are required to determine the extent ofthe barrier; and,low-level intrusion events are likely to go undetected byonline water quality monitors. Includes tables, figures.
Product Details
- Edition:
- Vol. – No.
- Published:
- 11/01/2008
- Number of Pages:
- 10
- File Size:
- 1 file , 1.1 MB
- Note:
- This product is unavailable in Ukraine, Russia, Belarus
