This paper discusses how a utility and its bulk supplier have been working cooperatively on a pilot study of entry
point chloramination to quench the formation of additional disinfection byproducts in the
distribution system. The bulk supplier constructed chloramination facilities at the entry
point and has been operating these facilities since June 2002. The utility and its bulk
supplier have been monitoring relevant entry point and distribution system water quality
parameters quarterly or monthly since 1998. The monitoring data illustrate the temporal
and spatial extent of disinfection byproduct control achieved through entry point
chloramination. The costs to construct and operate the pilot facilities provide benchmarks
for other utilities facing a similar challenge.
Chloramination of the entry point appears to have reduced the formation of additional
disinfection byproducts significantly. Chloramination also appears to have other water
quality benefits in the distribution system. The effort, financial and otherwise, needed to
implement entry point treatment is one that utilities should consider only after
implementing other strategies to minimize the formation of disinfection byproducts.
Other systems with variable bulk water quality, competing water quality objectives,
extensive reliance on unlined cast iron pipe, poorly configured pipe networks and limited
funds may benefit from the experiences of this system. Benefiting systems include those
considering boosting residuals in their distribution systems, as well as other consecutive
systems. Includes 4 references, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 420 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 14 |
| Published : | 11/02/2003 |
