Abstract-Eskom has a zero-effluent discharge policy stipulation in their water use license. Thus, the wastewater generated from various processes should be treated and recycled for re-use. One of these types of water is RO-reject. This can be treated through the crystallization process along with coagulation and flocculation. The coagulant used in this study was Rheofloc 5023, the flocculent Rheofloc 5414; lime was used to increase the pH of the water samples. An optimal dosage for the lime was found to be 250 ppm, when the dosages of the coagulant and the flocculent were 2 ppm and 1 ppm, respectively. Under such conditions, turbidity, total hardness and alkalinity removal of 18, 26 and 67% were respectively achieved. The reduction of the levels of such parameters in water can contribute to minimize the probability of scale formation in the downstream process.