A pilot study was conducted from July 2001 to November 2003 to understand the
impact of ozonation on monochloramine decay and pH change in the future
Massachusetts Water Resources Authority's (MWRA) drinking water system. The
impact of the distribution system, which consists of old cast-iron pipes, was also
investigated.
Homogeneous and heterogeneous samples were taken from the Pipe Loop Pilot Plant
(PLPP), which represented the best and the worst scenarios respectively, i.e. a very
clean distribution system, or dead ends far from the main.
The results suggested that corrosion and biological activity inside the pipe were the
major causes of the deteriorated water quality in heterogeneous samples. In
homogeneous samples, ozonation may cause faster monochloramine decay and larger
decrease of pH. Therefore, more chemicals may be needed for pH adjustment and
residual disinfectant when the new Walnut Hill Water Treatment Plant (WHWTP) is
online. Includes 15 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.4 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 17 |
| Published : | 06/17/2005 |
