PDF created with pdfFactory Pro trial version www.pdffactory.com ١ Influence of using Porcelanite as coagulant aids on the Floc Filtration and determination optimum percentage removal turbidity Abstract The implication of energy input (G value) and energy input time (T f) as well as the GT f value (Camp number) resulting from the orthokinetic particle aggregation as part of the adsorption coagulation with charge neutralization were investigated in the laboratory using a direct filtration tests

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... arried out at a constant particle concentration. The water was flocculated with alum alone=44 mg/l, pH=7.6 (case NO.1) ; alum =30 mg/l and porcelanite dose =12 mg/l (as coagulant aids);pH=7.51; Temperature =31.4C o (case No.2) and alum =23 mg/l and porcelanite dose =18 mg/l (as coagulant aids); pH=7.6; Temperature =34.4C o (case No.3). In this research optimum removal of turbidity by means of this a direct filtration apparatus was achieved in the case No.2 at G values of around 25 sec-1 , T f =10 min the percentage removal of turbidity obtained was about (90 %) , whereas in case No.1 , the optimum percentage obtained was about (84 %) at G = 40 sec-1 , T f = 20 min and case No.3 , the optimum percentage obtained was about (86 %) at G= 30 sec-1 , T f = 20 min.