Abstract:
This study examined the disinfection efficiency of free chlorine and monochloramine for improve water quality, but if sources of controlling biofilm organisms in a model pipe system. The composition of the pipe material microbial contamination (e.g., sediment, was found to be a major influence on disinfection efficiency. Bacteria grown on galvanized, tubercles, flocculated materials) are not copper, or PVC pipe surfaces were readily inactivated by a 1-mg/L residual of free chlorine or eliminated, deterioration will soon monochloramine. Biofilms grown on iron pipes treated with free chlorine doses as high as 4 recur.lO In practice, it is difficult to mg/L (3-mg/L residual) for two weeks did not show significant changes in viability, but if effectively apply these procedures to treated with 4 mg/L of monochloramine for two weeks, these biofilms exhibited a more than transmission mains and trunk lines 3-log die-off. Accumulation of corrosion products on iron pipes was found to interfere with without extreme effort, high costs, and free chlorine disinfection.
