TIMECOURSE STUDY OF COAGULATION-FLOCCULATION PROCESS USING ALUMINUM SULFATE
Journal: Water Conservation and Management (WCM)
Author: Zahra Farasat, Reza Panahi, Babak Mokhtarani
Print ISSN : 2523-5664
Online ISSN : 2523-5672
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
In conformity with drinking water standards, water purification units must remove colloid impurities in water which shelters microorganisms such as bacteria and viruses, and natural organic matter (NOM) using the sequence of treatment processes including coagulation-flocculation, sedimentation or filtration and disinfection. The coagulation-flocculation process consists of rapid mixing, followed by slow mixing and settling at room temperature. Efficiency of coagulation-flocculation process depends on process parameters. Optimization of significant parameters such as initial pH, coagulant and flocculant dosage, settling time, mixing parameters and the effective temperature for coagulation-flocculation performance is crucial. In this study, time course study of coagulation-flocculation as well as the effects of coagulant dosage and pH in the synthetic wastewater produced by kaolin was investigated. Coagulant dosage and pH optimization is necessary to achieve optimal efficiency. Appropriate coagulant dosage, pH and settling time were 70 mg/L, 6.5 and 45 minutes, respectively and resulted in 99.72% turbidity removal.