Ultraviolet light disinfection provides great promise for utilities that will need to meet the
Cryptosporidium inactivation requirements of the Long Term 2 Enhanced Surface water
Treatment Rule. Ultraviolet disinfection is very effective against both Giardia and
Cryptosporidium as well as other microbiological pathogens. The technology is compact,
inexpensive and easy to operate. Theory suggests that ultraviolet disinfection does not
promote the formation of disinfection byproducts or impart enough energy to the water
to create new types of disinfection byproducts; however, there had not been a study
conducted within the United States to determine if there are unanticipated affects
resulting from ultraviolet disinfection of water on the long term quality of the water in the
distribution system.
The Massachusetts Water Resources Authority (MWRA) and the Town of Concord, Massachusetts
in coordination with the Southern Nevada Water Authority (SNWA), and the Portland
Water Bureau, through an American Water Works Research Foundation (AwwaRF)
Tailored Collaboration Project are evaluating the effectiveness of ozone followed by
medium-pressure ultraviolet light (MP-UV) and of medium-pressure UV alone for
disinfection of unfiltered source water and distributed water quality. This research will
determine:
disinfection effectiveness (log inactivations) of Giardia, Cryptosporidium and
human enteric viruses, particularly in cold water; and,
synergistic impacts on disinfection byproduct formation, biostability, corrosion
control, and red water. Includes 2 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 370 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 13 |
| Published : | 11/02/2003 |
