PH = 5 | Beaker No. | 1 | 2 | 3 | 4 | 5 | 6 |
Alum Conc. (mg/l) | 0 | 10 | 15 | 20 | 30 | 40 | |
% of Turbidity reduction (sample A) | - | 40.6 | 68.0 | 90.9 | 89.2 | 65.1 | |
% of Turbidity reduction (sample B) | - | 54.4 | 72.3 | 80.0 | 71.3 | 68.3 | |
PH = 7 | Beaker No. | 1 | 2 | 3 | 4 | 5 | 6 |
Alum Conc. (mg/l) | 0 | 10 | 15 | 20 | 30 | 40 | |
% of Turbidity reduction (sample A) | - | 93.4 | 94.8 | 95.3 | 94.2 | 94.1 | |
% of Turbidity reduction (sample B) | - | 91.2 | 91.6 | 94.3 | 87.6 | 81.3 | |
PH = 9 | Beaker No. | 1 | 2 | 3 | 4 | 5 | 6 |
Alum Conc. (mg/l) | 0 | 10 | 15 | 20 | 30 | 40 | |
% of Turbidity reduction (sample A) | - | 91.8 | 93.0 | 93.7 | 95.4 | 91.2 | |
% of Turbidity reduction (sample B) | - | 85.3 | 89.0 | 89.2 | 94.9 | 93.8 |