Abstract
In this paper we describe the effect of enzyme treatments
on the production of polymeric xylan, oligosaccharides
and hemicellulose lean pulp by alkaline extraction of
bleached hardwood kraft pulp. Enzyme treatments were
carried out before one or in between two subsequent
alkaline extractions by purified Trichoderma reesei
xylanase and endoglucanase II (Cel 5a) as well as by a
commercial monocomponent endoglucanase (FibreCareR).
Without enzyme pre-treatment 61% and 7% of the pulp xylan
was extracted in high purity in the first and second
alkaline stage, respectively. Higher molecular mass xylan
was obtained in the second than in the first alkaline
extraction. Xylanase treatment before alkaline extraction
hydrolyzed up to 12% of xylan to xylooligosaccharides.
According to our results, preparation of polymeric xylan,
and/or oligosaccharides as well as hemicellulose lean
pulp with cellulose content of 93-94%, is possible by
enzyme-aided alkaline extraction process
| Original language | English |
|---|---|
| Pages (from-to) | 102-108 |
| Journal | Carbohydrate Polymers |
| Volume | 93 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2013 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- Dissolving pulp
- endoglucanase
- enzyme treatment
- oligosaccharide
- xylan
- xylanase