The Waste water will be pumped on a Metal Open tray (painted with absorber paint) through a simple pump and from there it will be falling on the Receiver by gravity. The receivers will be heated by concentrating solar energy. The temperatures on the Receivers will be more than 1,000° C. The falling water on the receivers will start evaporating and the rest of the water which is not evaporated will be heated up. The heated water will fall again in the nearby Solar Pond through a sprinkler system and the cycle will be repeated continuously.