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Removing suspended solids and colloids are one of the most important watertreatment processes. In this research, experimental tests have been done toassess the effects of pH and different doses of PACL on turbidity removalefficiency. The optimum dose of poly aluminum chloride (PACL) for removingturbidity was also determined. Turbidity was created artificially by adding theKaolin with six different initial turbidities between 20 to 300 NTU rested forhalf an hour. The results have been showed that the best removal efficiency wasat the pH of natural water. The optimal doses consumption of PACL was about 5PPM.

Estimating of optimal dose of PACL for turbidity removing from water