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Bleaching of wheat straw-rich soda pulp with xylanase from a thermoalkalophilic Streptomyces cyaneus SN32
- Source :
- Bioresource Technology. 97:2291-2295
- Publication Year :
- 2006
- Publisher :
- Elsevier BV, 2006.
-
Abstract
- An alkalistable endoxylanase from Streptomyces cyaneus SN32 was applied in bleaching of wheat straw enriched soda pulp. The xylanase dose of 10 IUg(-1) moisture free pulp exhibited maximum bleach boosting of soda pulp (pH 9.5-10.0) optimally at 65 degrees C after 2 h of reaction time. Pre-treatment of pulp with xylanase and its subsequent treatment with 6% hypochlorite reduced the kappa number by 8.7%, enhanced the brightness index by 3.56% and improved other paper properties such as tear index and burst index. The enzymatically-prebleached pulp when treated with 10% reduced level of hypochlorite (5.4%) gave comparable brightness of resultant hand sheets to the fully bleached pulp (6% hypochlorite).
- Subjects :
- Paper
Environmental Engineering
Bleach
Color
Hypochlorite
Bioengineering
Alkalies
engineering.material
Kappa number
chemistry.chemical_compound
stomatognathic system
Botany
Streptomyces cyaneus
Food science
Waste Management and Disposal
Triticum
Endo-1,4-beta Xylanases
biology
Renewable Energy, Sustainability and the Environment
Pulp (paper)
General Medicine
Hydrogen-Ion Concentration
Straw
biology.organism_classification
Wood
Streptomyces
stomatognathic diseases
chemistry
engineering
Xylanase
sense organs
Subjects
Details
- ISSN :
- 09608524
- Volume :
- 97
- Database :
- OpenAIRE
- Journal :
- Bioresource Technology
- Accession number :
- edsair.doi.dedup.....673f33d1cb2058e1f43c1efd52f76eed