A water purification method and system, wherein a source of ultraviolet light is disposed relative to the vessel containing the water to be purified for directing ultraviolet light along a major axis of the vessel, and the water is illuminated with the ultraviolet light. One of the systems includes a...http://www.google.se/patents/US20020144955?utm_source=gb-gplus-sharePatent US20020144955 - Method and system for purifying water contained in a vessel
