The effectiveness of ultrasound for inactivation of Escherichia coli and MS2 coliphage was
quantified. The results showed that sonication alone could inactivate both organisms to non-
detectable levels, especially with long sonication times. A high power to volume ratio (900 W/L)
provided better inactivation than a low ratio (180 W/L). Inactivation resulted predominantly
from temperature effects as temperature increased to greater than 70C in less than 10 minutes at
900 W/L. Sequential application of sonication followed by chlorination did not show synergy;
rather, inactivation by the two disinfectants was less than additive. Simultaneous application of
sonication and chlorination showed significant synergism. Even with short contact times, when
temperature increases were not a factor, 4 to 5 log10 inactivation of E. coli was achieved by
simultaneous disinfection, compared to less than 2 log10 inactivation that would be predicted if
the effects were only additive. Similar trends were observed in MS2 inactivation experiments. Includes 8 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 260 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 8 |
| Published : | 11/01/2002 |
