Water clarification determines remove of suspended solids and particulate matter, by improving settling [1]. In this paper, we studied water clarification used in the treatment of industrial effluent from ammonia plants. Clarification is the first step of wastewater treatment and consist in coagulation, flocculation, and sedimentation [1, 2]. Coagulation is used for the removal of the colloid-sized suspended matter and consist in destabilization by charge neutralization. Flocculation is the process of getting together the destabilized with forming agglomerated particles, or "floc". Finally, flocculated particles are removal from suspension by sedimentation. In present iron and aluminium coagulants, are used, its hydrolysis products having a significant role in the coagulation process. The pH affects particle surface charge and floc precipitation, but the pH for the best clarification performance not always coincide with the optimum pH for floc formation [3]. The efficiency of clarification depends greatly on the nature of the turbidity particles, the amount of turbidity, and the mixing or reaction energies available during coagulation. The waters with NTU (Nephelometric Turbidity Units) up to 60 can be clarified with the best results by a combination of an inorganic salt and cationic polymer. At turbidity greater than 60 NTU, a polymeric primary coagulant alone is normally sufficient. In this paper was studying the removal of total suspended solids (TSS) and turbidity NTU from ammonia plant wastewater. The performance of the coagulant was tested using a JAR Tester. The turbidity was measured with a Cole Parmer Model 8391-40 turbidity meter. The experiments are carried on real industrial waters, in the period January-May 2019. For the TSS removal, 100 mL of the waste water was filled in the jar tester and stirred at 130 rpm for 10 min, in order to maintain a homogeneous TSS distribution. The coagulant sample was weighed carefully to make 0.2-0.8 ppm in the wastewater sample. On the other hand was used ppm of the 2-12 ppm 7221 coagulant, a low molecular weight cationic coagulant. Simultaneous experiments were realized with both coagulants. After the coagulant was added, the wastewater was stirred at 30 rpm for 10 min and then at 5 rpm for 10 min. The pH in the test was adjusted by adding sulphuric acid and sodium hydroxide solutions. The initial TSS was 180 g/L. The pH in the test was adjusted in the range of 7–8.5. In the case of aluminium sulphate maximum removal degree was 88% for 0.7 ppm dosage, and for 71221 maximum degree was 86% for 10 ppm. The removal degree was improved by using 0.6 ppm aluminium sulphate and 4 ppm 71221 coagulant, when was obtained 95% removal degree. The mixture of coagulants was more effective than conventional treatment in TSS removal, and determines an improved efficiency and reduced costs in clarification processes.