Researchers at Stanford University have developed a high speed, low cost, energy efficient water purification system that promises to reduce the incidence of waterborne disease in the developing world. The team has developed high speed filters using nano tubes made from silver, well known for its bacteria killing qualities and carbon which is a good electric conductor. The highly conductive nano coated cotton filters kills the pathogens using an electrical field instead of physically trapping the same when water flows through it.
The cost effective filters uses only a few milli amperes of current which is barely enough to cause a tingling sensation in a person. The researchers believe that the filters can kill 98% of the bacteria and is apt for regions that do not have access to chemical treatments such as chlorine.