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) | - | 90.8 | 94.6 | 95.9 | 93.7 | 84.1 | |
% of Turbidity reduction (sample B) | - | 81.3 | 87.4 | 95.2 | 94.8 | 93.8 | |
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) | - | 89.7 | 93.5 | 96.5 | 91.2 | 87.7 | |
% of Turbidity reduction (sample B) | - | 92.5 | 95.7 | 97.5 | 94.8 | 83.4 | |
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) | - | 87.5 | 87.7 | 92.9 | 94.1 | 84.3 | |
% of Turbidity reduction (sample B) | - | 80.1 | 88.5 | 93.8 | 97.5 | 94.0 |