i saw some "bleach" generators on amazon which work by electrolysis of slightly salted water. this seems like a pretty decent idea for emergency water treatment, would require a solar panel and some salt. i wonder if there are studies on the efficiency.

@bonifartius Good question, salt storage isn't much of an issue as you can have tons of it.
Efficiency of the setup is a good question.
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@mangeurdenuage you just need adequate concentration of chlorine which can't be that high - i read about using household bleach (NaOCl) and you apparently only need a few drops of it for one liter. the water has to be clear of solids of course, but that is the case for most methods which aren't boiling.

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