Table 7 Effect of cell-free enzyme pretreatment on the charge of fiber surfaces
Enzyme dose (%) | Cationic starch dose (%) | Start potential (mV) | Cationic demand (µeq/L) |
|---|---|---|---|
Refined to 1000 revs | |||
0 | 0 | − 1649 | 7 |
|  | 0.5 | − 687 | 3 |
|  | 1 | − 317 | 1 |
0.5 | 0 | − 977 | 7 |
|  | 0.5 | − 672 | 6 |
|  | 1 | − 362 | 3 |
1 | 0 | − 826 | 7 |
|  | 0.5 | − 690 | 6 |
|  | 1 | − 513 | 3 |