Journal of Applied Science and Environmental Studies
Abstract
An optimization study of the coagulation-flocculation chemical treatment process was carried out at the Ain Nokbi station in Fez in order to identify the problems associated with liquid rejects. The purpose of the study involved optimizing three key factors in the coagulation-flocculation process: the pH of the raw water, the coagulant amount (aluminum sulphate) and the flocculent amount (sodium alginate solution or polyelectrolyte at 0.1 mg/l). This demonstrated how acidification can improve treatment performance, particularly in terms of pH. Specifically, reducing the pH to 7 revealed advantages during disinfection, boosting the efficiency of the process. In addition, the optimum dosage of coagulant (aluminum sulphate) has been determined to be around 50 mg/l instead of 60 mg/l, saving 10 mg/l and reducing annual costs by MAD 240,000
