Sampling points | Before treatment (mg/l) | After treatment (mg/l) | Percentage reduction (%) | Average (%) |
P1 | 44.72 | 9.08 | 79.70 | 83.55 |
P2 | 51.12 | 9.59 | 81.24 | |
P3 | 57.89 | 5.96 | 89.70 |