3.Result and Discussion
Dosage was one of the most important parameters that been considered to determine the optimum condition for the performance of coagulant in coagulation and flocculation. Basically, insufficient dosage or overdosing would result in the poor performancein flocculation (Hassan, Tan, & Noor, 2009).
Therefore, it was crucial to determine the optimum dosage in order to minimize the dosing cost and obtain the optimum performance in treatment. The optimum dosage of coagulant is defined as a value above which there is no significant increase in removal efficiency with further addition of the coagulant
(Zainol, Aziz, Yusoff, & Umar, 2011)