Abstract
This paper describes the effects of initial water quality conditions and water treatment variables on the removal of dissolved organic matter (DOM) during coagulation with aluminum sulfate. Inital pH, initial turbidity, aluminum dose, preozonation dose and flocculation time were studied as experimental variables. An orthogonal experimental design was employed with statistical analysis of data by the Duncan's Multiple Range test. The removal of DOM was studied by measuring nonpurgeable organic carbon (NPOC) and u.v. absorbance. Treated waters derived from selected experiments were further characterized to elucidate how important characteristics of the DOM affect its removal.
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