Table 3.
Summary of flocculation and re-flocculation indicators.
| Primary flocculant concentration (mg/g PCC) | Re-flocculation aid (mg/g PCC) | d50 after 1st flocculation stage (µm) | d50 after re-flocculation (µm) | SE after 1st flocculation stage | SE after re-flocculation | Re-flocculation % |
|---|---|---|---|---|---|---|
| E1++++ (8 mg/g) | – | 198.7 | 40.2 | 2.27 | 2.42 | 8 |
| E1++++ (8 mg/g) | E2 (2.9 mg/g) | 198.1 | 41.2 | 2.28 | 2.38 | 14 |
| E1++++/E2 (50/50) 8 mg/g | – | 54.3 | 24 | – | 2.37 | 14 |
| E1++++ (8 mg/g) | BHMW (2.6 mg/g) | 191.2 | 95.5 | 2.27 | 2.33 | 40 |
| E1++++ (8 mg/g) | Bentonite (2.5 mg/g) | 191.8 | 159.1 | 2.26 | 2.59 | 70 |
| E1++++ (8 mg/g) | Bentonite (25 mg/g) | 191.8 | 80.5 | 2.26 | 2.0 | 29 |
| E2++++ (8 mg/g) | – | 123.2 | 60.1 | 2.38 | 2.53 | 26 |
| E2++++ (8 mg/g) | E2 (2.41 mg/g) | 120.5 | 96.1 | 2.39 | 2.48 | 48 |
| E2++++/E2 (50/50) 8 mg/g | – | 88.0 | 34.9 | – | – | 18 |
| E2++++ (8 mg/g) | BHMW (2.7 mg/g) | 120.2 | 94.0 | 2.34 | 2.37 | 46 |
| E2++++ (8 mg/g) | Bentonite (2.5 mg/g) | 128.3 | 120.1 | 2.38 | 2.78 | 62 |
| E2++++ (8 mg/g) | Bentonite (25 mg/g) | 128.3 | 67.1 | 2.38 | 2.1 | 21 |
| F1++++ (10 mg/g) | – | 199.3 | 45.9 | 2.19 | 2.30 | 6 |
| F1++++ (10 mg/g) | F1 (4.5 mg/g) | 197.6 | 69.9 | 2.17 | 1.96 | 7 |
| F1++++/F1 (50/50) 10 mg/g | – | 129.7 | 29.1 | – | – | 7 |
| F1++++ (10 mg/g) | BHMW (2.5 mg/g) | 183.2 | 146.9 | 2.18 | 2.32 | 57 |
| F1++++ (10 mg/g) | Bentonite (2.5 mg/g) | 199.4 | 145.6 | 2.16 | 2.60 | 58 |
| F1++++ (10 mg/g) | Bentonite (25 mg/g) | 199.4 | 79.8 | 2.16 | 2.05 | 25 |