Brother, in cooler climates, you may also consider 'solar pasteurization'
which kills germs using solar thermal energy (heat).
Please visit my website (http://www.h2ohow.com
) to find some new solar
pasteurization and SODIS techniques that you can make for yourself.
One technique I developed is called the 'Solar Kangaroo'. On sunny days
with temperatures above 70° F (21° C) it will pasteurize a 2-liter bottle
(or bag) in about 5-hours. I see no reason why the technique would not
work indoors with direct sunlight exposure. Again, unlike SODIS this
technique does not depend on UV radiation, but thermal energy (heat)
that is created from sunlight, focused and conserved by the tool.
Each kangaroo system can be hand-made (by you) in 20 minutes at a
cost of under $4 in materials.
I hope this information is helpful.
04 Dec 2010 17:51