Thanks Perry.
The links to Lenntech were most informative. The one thing I didn't see explained very well is the time/temperature curve. Isn't an increase in temperature usually accompanied by an increase in the chemical reaction rate?
Here in the Pacific Northwest our stream water is often near 32°F. Which means we might have to wait much longer for the disinfection process to take place. It seems to me an increase of only 18°F (to 50°F) would be huge.