Optimization of composite polymer dosing and pH in wastewater treatment plants

Abstract

In this paper, a composite Aluminum Chloride–polyacrylamide polymer (indicate AlCl3-PAM) was prepared by physical mixing. the response surface methodology (RSM) and central composite design (CCD) was utilized for modeling and optimization of the flocculation process of the wastewater, to utilized maximum removal of the (turbidity, total suspended solid and chemical oxygen demand). moreover, the influence of composite polymer dosage and pH on the wastewater flocculation process was discussed. Square models developed for the three responses (Turbidity, TSS and COD) denoted the optimum condition of flocculation process in terms of optimal composite polymer dosage and optimal pH. The optimum composite polymer dosage was (2.5 mg/l) with an optimum pH 7. In these optimal values, the wastewater treatment achieved (84.9%, 97%, and 92.4%) removal of COD, turbidity, and TSS, respectively.