The Massachusetts Water Resources Authority (MWRA), in coordination with the Southern
Nevada Water Authority (SNWA), the Town of Concord, MA, and the Portland, Oregon Water
Bureau, through an American Water Works Research Foundation (AwwaRF) Tailored
Collaboration Project is evaluating the effectiveness of ozone followed by medium-pressure
ultraviolet light (MP-UV), and of medium-pressure UV alone for disinfection of water and its
effects on distributed water quality. This paper presents early results of the research which will
determine: the effectiveness of ozone and UV for inactivation, in terms of log inactivation, of
Giardia, Cryptosporidium, and human enteric viruses; the synergistic impacts of ozone and
UV on disinfection byproduct formation, biostability, corrosion control, and red water; and,
provide guidance for the design and operation of the optimum primary disinfection scheme. This
study involves many water quality evaluations, but the crucial results are those that will affect
the design and implementation of ozone and UV treatment processes in water treatment facilities.
Preliminary results indicating the percent UV transmittance reduction following ozone and the
potential for reduction in disinfection byproducts are presented, along with bench-scale test results of cold
water impacts on Cryptosporidium and Giardia inactivation. Results of MS-2
challenge tests are also presented. Includes 6 references, tables, figure.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 910 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 15 |
| Published : | 06/15/2003 |
