A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of Distribution System Materials on bacterial regrowth
To assess the interactions between pipe materials, organic carbon levels, and disinfectants, studies using annular reactors with ductile‐iron, polyvinyl chloride (PVC), epoxy, and cementlined coupons were carried out in the laboratory and at four field sites. Laboratory studies used biologically treated water with and without 0.2 mg/L residual free chlorine or monochloramine, in the presence or absence of 0.5 or 2.0 mg/L humic substances. In the lab studies, the type of disinfectant did not lead to significant differences in effluent and biofilm counts. Increases in carbon led to greater numbers of biofilm and effluent organisms, with the effect most pronounced on iron. Regardless of carbon level, PVC systems typically had the lowest numbers of bacteria, whereas iron had the highest. Cement and epoxy were intermediate. Depending on the site, field studies showed that iron had the highest number of bacteria or there was no difference in materials.
Effect of Distribution System Materials on bacterial regrowth
To assess the interactions between pipe materials, organic carbon levels, and disinfectants, studies using annular reactors with ductile‐iron, polyvinyl chloride (PVC), epoxy, and cementlined coupons were carried out in the laboratory and at four field sites. Laboratory studies used biologically treated water with and without 0.2 mg/L residual free chlorine or monochloramine, in the presence or absence of 0.5 or 2.0 mg/L humic substances. In the lab studies, the type of disinfectant did not lead to significant differences in effluent and biofilm counts. Increases in carbon led to greater numbers of biofilm and effluent organisms, with the effect most pronounced on iron. Regardless of carbon level, PVC systems typically had the lowest numbers of bacteria, whereas iron had the highest. Cement and epoxy were intermediate. Depending on the site, field studies showed that iron had the highest number of bacteria or there was no difference in materials.
Effect of Distribution System Materials on bacterial regrowth
Camper, Anne K. (author) / Brastrup, Kristin (author) / Sandvig, Anne (author) / Clement, Jonathan (author) / Spencer, Catherine (author) / Capuzzi, A.J. (author)
Journal ‐ American Water Works Association ; 95 ; 107-121
2003-07-01
15 pages
Article (Journal)
Electronic Resource
English
Distribution Systems , Reduction , Bacteria , Research , Biofilm , Utilities , Organic Carbon , Pipes
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