Studies on Wind Aided Intensified Evaporation for Rapid Removal of Salts and Pollutants

Reverse Osmosis (RO) process is a water purification technology which purifies drinking water, desalinate the seawater and treatment of effluents from various domestic and industries to yield potable water in the form of permeate and waste in the form of RO reject or Retentate or Concentrate. The main objective of the present research work is the optimization of RO rejects process management efficiency and issues related to the conventional ZLD approach. In order to minimize the large land requirement, while we using conventional type method such as evaporation pond, which are expensive and needs maintenance because of the materials of construction and their complexity, with particularly high operating costs primarily due to energy consumption and for the management of reject water ZLD technologies intends to develop an alternative solution for brine water management by modern method using wind as an energy source for managing the reject water. Wind aided intensified evaporation is a method in which water is pumped on to fabrics to provide additional surface area for evaporation. The brine is slowly distributed across the sheets. Brine flows down the vertical sheets, concentrating as it falls, due to the evaporation of water by the wind passing across the surface of sheets. The concentrated brine is collected at the base of the system and returned to the holding area. In this article the surface of sheets acts as an absorbing medium that simply absorbs the feed solute and suppose to evaporate the solute with the action of wind velocity. The experimentation is done by practising NaCl solution with different range of concentration in the laboratory scale unit which is almost equivalent to brine concentrations.