Wood represents one of the primary costs associated with production of chemical pulps, so it is crucial to
use wood in the most efficient manner possible. In kraft pulping, it takes about 2.3 dry kg wood to produce
1 dry kg fully bleached pulp, a yield of about 43%. The 57% yield loss occurs primarily during cooking
(pulping) and to a lesser extent during bleaching, as the lignin and other non-fibrous wood components
are removed and the pulp is brightened.
Click on the links at the right for more information.
More information:
Pulp yield for ECF and TCF pulps
Effects of pulping on wood requirements
Effectiveness of chlorine-based vs. oxygen-based bleaching
- WATER
- ENERGY
- GREENHOUSE GASES
- WOOD USE
- EMISSIONS TO AIR
- DISCHARGE TO WATER
- SOLID WASTE
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