Water chemicals
Polyaluminium chloride

| Before processing | After processing | ρ(Flocculant)/ mg·L-1 |
| Blue turbid | Colorless and transparent | Polymerization of ferric chloride:100 |
| PH:7.0 | PH:6.8 | |
| COD:150mg/L |
COD:70mg/L |

| Before processing | After processing | ρ(Flocculant)/ mg·L-1 |
| Blue turbid | Colorless and transparent | Polymerization of ferric chloride:100 |
| PH:7.0 | PH:6.8 | |
| COD:150mg/L |
COD:70mg/L |