Abstract
This paper describes the effects of several important water quality and water treatment variables on particle formation and growth during chemical coagulation. Experimental variables included initial pH, initial turbidity, aluminum sulfate dose, preozonation dose and flocculation time. An orthogonal experimental design was employed with statistical analysis of data by the Duncan's Multiple Range Test. The variables investigated proved to be capable of imparting, individually or collectively, statistically significant effects on particle formation and growth. Particle growth during coagulation is a necessary prerequisite for the effective use of subsequent solid-liquid separation processes.
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