A call for Mindstorming- Affordable Cholera prevention!

Filtering Cholera with old sari- the original article
A great article, that probably saved a lot of life,

http://www.pnas.org/content/100/3/1051.full

I hope to spread and use this knowledge in Zimbabwe, to help the locals avoid Cholera by using affordable and common matereals.
Anyone with an Idea how to improve this method is VERY invited to comment and share his/her ideas here.
Has anyone an idea how to harnass Ultra Violet (UV) rays for aid in annihilation of the bacteria?
I thought about somehow using the sun, but have yet to find a cheap and affordable method for resourceless places like many poor areas in Zimbabwe and elsewhere in the world.

Quotes from a research on Filtering out Cholera by using simple cloth filter

"They found that an old sari cloth, folded at least four times, was as successful as specially designed nylon filters at removing plankton from water."

"Villages trained to use sari cloth experienced about half the historic average of new cholera cases.

The nylon filter produced marginally less impressive results.

The researchers say that not only does the use of old sari cloth, and similar fabrics worn in other parts of the world, appear to be an effective way to combat cholera, the material is cheap and convenient to obtain."

from : http://news.bbc.co.uk/2/hi/health/2640307.stm