In a Paris suburb, raw water monitoring conducted since 2000 revealed the presence of
Cryptosporidium. A risk assessment was conducted and
established that the elimination of Cryptosporidium would not be sufficient while complying with the
new bromate standards. Ultraviolet (UV) irradiation offers a cost-effective approach to achieve high
disinfection and appeared to be an appropriate alternative for the disinfection of surface water.
The question of where and how UV should be integrated in an existing water treatment
train was discussed, combining disinfection byproduct impact on downstream processes
and cost considerations. It was found that UV would meet the disinfection needs of
Neuilly-sur-Marne SWTP without photolysis of pesticides, production of nitrates, or
negative impact on downstream process. Results from pilot testing have shown that the best UV
location for water quality and cost considerations would be after GAC filtration. LP or MP
lamp technologies could be used and their impact on water quality appeared to be close but
in France, the MP system has to be authorized by water authorities before implementation. A
UV step will be implemented in the Neuilly-sur-Marne SWTP in 2008. Includes 17 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 270 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 13 |
| Published : | 06/17/2005 |
