摘要：This study was conducted to assess the optimization of the coagulation-flocculation process and toinvestigate the interactive effects of experimental factors in automotive wastewater treatment. Basedon the coagulation-flocculation process, an automotive wastewater was treated using polyaluminiumchloride as the coagulant and anionic polyacrylamide as the flocculant. Response surface methodologywas applied to optimize the operating variables: coagulant dosage, flocculant dosage and pH. Wefound that the optimum conditions for chemical oxygen demand removal (73.7%) were, a coagulantdosage of 73.3 mg/L, a flocculant dosage of 3.46 mg/L and pH 7.45. The optimum conditions for theremoval of heavy metals (Fe, Cr, Cu) were, a coagulant dosage range of 65.26-170.9 mg/L, a flocculantdosage of 5.36 mg/L, and pH 6.13 (with 78.7-99.7% of heavy metals removal). The experimental dataand predicted model proved that RSM is a suitable approach for optimizing the coagulation-flocculationprocess in automotive wastewater treatment.
