Full Description

Ultraviolet light disinfection provides great promise for utilities that will need to meet theCryptosporidium inactivation requirements of the Long Term 2 Enhanced Surface waterTreatment Rule. Ultraviolet disinfection is very effective against both Giardia andCryptosporidium as well as other microbiological pathogens. The technology is compact,inexpensive and easy to operate. Theory suggests that ultraviolet disinfection does notpromote the formation of disinfection byproducts or impart enough energy to the waterto create new types of disinfection byproducts; however, there had not been a studyconducted within the United States to determine if there are unanticipated affectsresulting from ultraviolet disinfection of water on the long term quality of the water in thedistribution system.The Massachusetts Water Resources Authority (MWRA) and the Town of Concord, Massachusettsin coordination with the Southern Nevada Water Authority (SNWA), and the PortlandWater Bureau, through an American Water Works Research Foundation (AwwaRF)Tailored Collaboration Project are evaluating the effectiveness of ozone followed bymedium-pressure ultraviolet light (MP-UV) and of medium-pressure UV alone fordisinfection of unfiltered source water and distributed water quality. This research willdetermine:disinfection effectiveness (log inactivations) of Giardia, Cryptosporidium andhuman enteric viruses, particularly in cold water; and,synergistic impacts on disinfection byproduct formation, biostability, corrosioncontrol, and red water. Includes 2 references, tables, figures.

Product Details

Edition: Vol. - No. Published: 11/02/2003 Number of Pages: 13 File Size: 1 file , 370 KB