Southwestern Public Service Company has two towers operating one sewage effluent make-up that have film fill.  This paper will look at the water treatment and the operating experience on these towers.  One tower has been in operation since 1976 and the other since 1980.  The effect of algae and slime on the fill will be discussed.

82-12: Sewage Effluent Make-Up to Cooling Towers with Film Fill