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Plots of effluent volume as a function of time for hydrolyzed polyacrylamide (HPAM) polymer concentrations of 3000 mg/L (a) and 3300 mg/L (b) in the filtration ratio tests. The slope denotes the filtration ratio. It can be seen that a slop of 1.0 was obtained for the concentration of 3000 mg/L and a slop of 1.08 was obtained for the concentration of 3300 mg/L.
