...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Process Biochemistry >Cellulase-assisted refining of chemical pulps: Impact of enzymatic charge and refining intensity on energy consumption and pulp quality
【24h】

Cellulase-assisted refining of chemical pulps: Impact of enzymatic charge and refining intensity on energy consumption and pulp quality

机译：纤维素酶辅助化学浆的精制：酶电荷和精制强度对能耗和纸浆质量的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Paper production requires fibres to be refined, meaning mechanically treated to present sufficient bonding potential. As it is a highly energy consuming stage, various charges of cellulase as a pre-treatment were investigated to reduce the energy consumption and improve paper properties. The enzyme was added during pulp slushing and conditions of treatment were chosen to be compatible with an industrial application. Results obtained after low consistency disc refining of a softwood bleached kraft pulp were compared at a given drainage index. Enzymatically-treated samples showed a better development of fibrillation leading to a stronger paper. Moreover, fibre swelling was significantly improved. The impact of cellulase charge added to the pulp was identified. However, for all cellulase charges tested, fibre intrinsic resistance was lowered. Consequently fibres became shorter and tear index dropped. A solution was found by applying a milder treatment consisting in reducing refining intensity. This was a way to limit the intense fibre cutting at high refining levels. Moreover, by treating pulp with cellulase, it became possible to reduce refining intensity by 33%, keeping breaking length similar to control.
机译：造纸需要对纤维进行精制，这意味着要进行机械处理才能提供足够的粘合潜力。由于它是一个高能耗的阶段，因此对各种纤维素酶进料进行了预处理，以减少能耗并改善纸张性能。在纸浆浸浆期间添加酶，并选择处理条件以使其与工业应用兼容。在给定的排水指数下，比较了软木漂白牛皮纸浆的低浓度圆盘精制后获得的结果。经酶处理的样品显示出更好的原纤化，从而增强了纸张强度。此外，纤维溶胀得到显着改善。确定了添加到纸浆中的纤维素酶电荷的影响。但是，对于所有测试的纤维素酶电荷，纤维的固有电阻都降低了。因此，纤维变短并且撕裂指数下降。通过进行较温和的处理（降低精制强度）发现了解决方案。这是在高精炼水平下限制强力纤维切割的一种方法。此外，通过用纤维素酶处理纸浆，可以将精制强度降低33％，同时保持断裂长度与对照相似。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号