 |
|
| Table 2: (DZ) and (ZD) treatments of an unbleached softwood kraft pulp (Kappa number 24). |
| Bleaching Sequence |
D E D E D |
(DZ)E D E D |
(ZD)E D E D |
| ClO2, kg ClO2/ODT of pulp |
35 |
27 |
29 |
| O3, kg/ODT of pulp |
- |
3.7 |
3.6 |
| ISO Brightness (%) |
90.0 |
90.5 |
90.3 |
| Viscosity, mPa.s |
15.1 |
13.2 |
13.7 |
| AOX, kg/ODT of pulp |
1.5 |
0.65 |
0.61 |
| Replacement Ratio, kgClO2/kg.O3 |
- |
2.1 |
1.7 |
| AOX measured on the combined effluent as is. |
|