In recent years, ultraviolet (UV) technology for drinking water disinfection has experienced rapid
growth in North America and Europe driven by the needs of disinfection byproduct reduction and
control of emerging pathogens, such as Cryptosporidium, that are resistant to chlorination. Tsinghua
University did some work based on pilot scale UV system in Dongguan. The objective of this study was to
evaluate the efficacy of UV systems for drinking water under pilot-scale conditions (continuous flow
system) and compared with the collimated beam results using the same water quality. The
experimental results showed that: UV was effective against E. coli and TBC. B. subtilis, and MS2
was more UV-resistant especially when UVT was below 90%; the inactivation of microorganisms
by UV could be described with first-order kinetics using fluence-inactivation data from laboratory
studies in CB tests for a certain fluence range, no inactivation at low fluences (shoulder) and no
further increase of inactivation at higher fluences (tailing) was observed for some challenge
micro-organisms; water quality and UV sensitivity of microorganism influenced the inactivation
rate; for the daily monitor results of 13000 hours, UV could be a stable disinfectant for
total coliform and TBC; and, the lamp intensity of the online monitor showed that the lamp efficiency decay
was limited within the first 12000 hours. Includes 10 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 790 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 13 |
| Published : | 11/01/2008 |
