Augmentation of saline streams in solar stills integrating with a mini solar pond

Industrial effluent was evaporated in a fin type single basin solar still and a stepped solar still separately. To preheat the saline water, a mini solar pond was integrated with these stills. Both the stills were operated with mini solar pond and tested individually. In fin type single basin solar still, maximum productivity is obtained, when it is modified with black rubber, sponge and sand. The stepped solar still was modified with fin, pebble and sponge to enhance their productivities. When mini solar pond, pebble, sponge and fin are used in stepped solar still, maximum productivity was obtained To settle the industrial effluent, a settling tank was also fabricated with five layers namely: tray for raw effluent, pebble layer, coal layer, sand layer and collection tray for settled effluent. Physical and chemical analyses were made for raw effluent, settled effluent and distilled water. Economic analysis was made.