Welcome to Chemistry and Industry of Forest Products,

›› 2012, Vol. 32 ›› Issue (4): 77-82.

• 研究报告 • Previous Articles     Next Articles

Enzyme Treatment before and after Oxygen Delignification of Acacia EMCC Kraft Pulp

WANG Yu-xiu1,2, TONG Guo-lin1, YOU Ji-xue1   

  1. 1. Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China;2. Shandong Asia Pacific SSYMB Pulp & Paper Co., Ltd, Rizhao 276826, China
  • Received:2011-09-04 Revised:1900-01-01 Online:2012-08-30 Published:2012-08-30

Abstract: The effect of enzyme treatment on oxygen delignification of Acacia EMCC kraft pulp was investigated. The results indicated that the optimum dosage of laccase/xylanase system (LXS), which produced by white-rot fungus, was 7IU/g in the pretreatment process. For LXS pretreated pulp, high quality pulp was obtained when fibers were treated by 2.5 alkali dosage for 60 min at 100℃ in oxygen delignification. The optimum treatment time and enzyme dosage was 2h and 5IU/g when LXS was used for pulp posttreatment after oxygen delignification. The SEM indicated that the fibers with rough surface and many tiny holes and cracks in the cross section of the cell wall were obtained after enzyme treatment. It clearly showed that LXS could be used as posttreatment following oxygen delignification.

Key words: Acacia EMCC kraft pulp, oxygen delignification, enzyme treatment

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