The goal of this slide presentation was to provide an overview of recent Canadian-led
research activities related to distribution
systems, including:
Anti-Microbial Resistance of Escherichia coli and
Opportunistic Pathogens in Distribution Systems
(AwwaRF 3087);
Strategy to manage and Respond to Total Coliforms and
E. coli in the Distribution Systems (AwwaRF 3116); and,
protecting the Integrity of Drinking Water Distribution
Systems (CWN Project). AwwaRF 3087
Project Objectives were:
to examine the effects of UV disinfection in
combination with chemical disinfectants on E.
coli and heterotrophic bacteria in model drinking
water distribution systems;
to examine the effects of UV disinfection in
combination with chemical disinfectants on E.
coli and heterotrophic bacteria in model drinking
water distribution systems; and, to
understand the phenotypic
changes of E. Coli in distribution
systems as they relate to
disinfection conditions and pipe
material. The technical approach used:
annular reactors (ARs) to
simulate conditions and model pathogens
in drinking water distribution systems. An example operation of two ARs is outlined along with API test results. Preliminary conclusions
(AwwaRF 3087) included:
UV treatment had little effect on growth of biofilm HPC
bacteria;
no significant difference between pre and post UV
treatment;
biofilm HPCs unaffected by disinfection in CI ARs;
suspended HPCs best inactivated in PC ARs; and,
CI ARs supported an order of magnitude higher of
biofilm HPCs over PC ARs. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 3.3 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 27 |
| Published : | 06/01/2006 |
