Filtration Downflow Velocity Variation

Experiment 1: 6 mm/s downflow velocity, 5 NTU influent, 10 inch foam depth, 1.5 mg/L alum dose

Experiment 2: 12 mm/s downflow velocity, 5 NTU influent, 10 inch foam depth, 1.5 mg/L alum dose

Experiment 3: 20 mm/s downflow velocity, 5 NTU influent, 10 inch foam depth, 1.5 mg/L alum dose