Cleaning water with UV light
The UV-Tube, a low-cost water disinfecting system, is the sort of technology that disaster relief agencies may begin to turn to in the arduous cleanup in the wake of Hurricane Katrina. Other ideas include cheaper systems to test water and, further in the future, new styles of chemical purifiers.
The UV-Tube--which kills germs in water with an ultraviolet light bulb--costs about $70 to put together, can be assembled from components that are fairly easy to find, and can be run off of a solar panel, key in an area where the electrical grid has crumbled.
More importantly, it can process about five liters of water per minute.
Source: news.com.comAdded: 26 October 2005