Patent ID: 7494572
Filing Date: 2009-02-24
Classification: B01D,C02F,Y02A,Y02W,Y10S

Abstract:
1. A water still for placement on or in a body of contaminated water for collecting condensed water vapor comprising: a chamber having a substantially impervious upper section and a base coupled to the substantially impervious upper section, the base formed from a membrane, said membrane being of a material which performs membrane separation by preferentially absorbing water molecules over sodium and chloride ions and transporting said water molecules across said membrane as a vapor such that in the presence of a humidity differential where said membrane has a high humidity side and a low humidity side, water vapor is released from the low humidity side; and a water collection well having an opening into which condensed water vapor can collect, the water collection well sited within the base and generally extended outwardly therefrom, wherein the water collection well acts, in use, as a heat sink of the water still.