Abstract
The increased retention of hemicelluloses, particularly glucomannan, during poly sulphide pulping may affect the pulp's response to hemicellulase-assisted bleaching, possibly in the same way as postulated for redeposited xylans. MCC (modified continuous cooking) pulp prepared in the laboratory with and without poly sulphide (PS) addition was examined for hemicellulase-assisted bleaching with purified xylanase and mannanase from Trichoderma reesei.
Glucomannan solubilization during mannanase treatment was not increased for MCC/PS pulp over reference MCC pulp, suggesting that the yield gain for MCC/PS pulp was maintained. Improvements to chlorine dioxide (DED) and hydrogen peroxide (QPPP) bleaching after hemicellulase treatments were also unaffected by polysulphide addition to modified kraft pulping.
Glucomannan solubilization during mannanase treatment was not increased for MCC/PS pulp over reference MCC pulp, suggesting that the yield gain for MCC/PS pulp was maintained. Improvements to chlorine dioxide (DED) and hydrogen peroxide (QPPP) bleaching after hemicellulase treatments were also unaffected by polysulphide addition to modified kraft pulping.
| Original language | English |
|---|---|
| Pages (from-to) | 178-183 |
| Journal | Journal of Pulp and Paper Science |
| Volume | 24 |
| Issue number | 6 |
| Publication status | Published - 1998 |
| MoE publication type | A1 Journal article-refereed |