Abstract: A process for treating cooling tower water in a system which includes a recirculated evaporative cooling water stream and a source of make-up water. A side stream is taken off of the source of make-up water and the side stream is directed to either a strong acid cation exchange resin unit and/or to a weak acid cation exchange resin unit, after which it is returned to the make-up water line. The pH of saturation is determined for the recirculated evaporative cooling water as is the pH. Depending upon the difference between the pH and the pH of saturation, the side stream of the make-up water is opened or closed and directed to one or both of the cation exchange units.

Abstract: A process for treating cooling tower water in a system which includes a recirculated evaporative cooling water stream and a source of make-up water. A side stream is taken off of the source of make-up water and the side stream is directed to either a strong acid cation exchange resin unit and/or to a weak acid cation exchange resin unit, after which it is returned to the make-up water line. The pH of saturation is determined for the recirculated evaporative cooling water as is the pH. Depending upon the difference between the pH and the pH of saturation, the side stream of the make-up water is opened or closed and directed to one or both of the cation exchange units.

Abstract: A process for conditioning recirculated evaporative cooling water in a cooling water system. The process reduces the amount of make-up water required during the operation of this system as compared to conventional water treatment systems. The process includes the steps of determining the pH of saturation. A strong cation exchange media is used in a controlled sidestream and operated so that the pH of the recirculated cooling water is within about a plus or minus 0.4 of the pH of saturation. The system avoids the necessity of storing acid at the water treatment site and also significantly reduces the amount of make-up water required.