文献类型：期刊文献

英文题名：OPTIMIZING ENZYMATIC PRETREATMENT OF RECYCLED FIBER TO IMPROVE ITS DRAINING ABILITY USING RESPONSE SURFACE METHODOLOGY

作者：Liu, Jun[1] Hu, Huiren[2] Xu, Jianfeng[2] Wen, Yangbing[1]

第一作者：Liu, Jun

通信作者：Liu, J[1]

机构：[1]Tianjin Univ Sci Technol, Tianjin Key Lab Pulp & Paper, Tianjin 300457, Peoples R China;[2]Chinese Acad Forestry, Key Lab Wood Sci & Technol State Forestry Adm, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2012

卷号：7

期号：2

起止页码：2121-2140

外文期刊名：BIORESOURCES

收录：;EI(收录号：20122915264365);Scopus(收录号：2-s2.0-84863812669);WOS:【SCI-EXPANDED(收录号:WOS:000306481700058)】；

基金：The authors would like to acknowledge the financial support of the International Scientific and Technological Joint Project of China and Canada (Grant No. 2008DFA91290 of the Ministry of Science and Technology of China). Financial support from the Tianjin technological innovated develop system and the planned project of the condition development platform (No. 10SYSYJC28000) is also gratefully acknowledged.

语种：英文

外文关键词：Response surface methodology (RSM); Box-Behnken Design (BBD); Recycled fiber; Drainage; Cellulase modification

摘要：A three-factor, three-level Box-Behnken Design (BBD) was used with enzyme dosage (0.05-0.15% o.d. fiber), enzymatic contact time (20-40 min), and pulp consistency (3-7%, o.d.) as independent variables to understand and optimize the enzymatic pretreatment conditions of mixed office waste (MOW) for maximum improvement of its drainability. All the independent variables considered were found to have significant influence on the drainability of the pulp. The enzyme dosage had a predominate effect, the pulp consistency took second place, and the contact time seemed to have low priority. A quadratic polynomial model had high Adj-R-2 value and low p value for predicting the decrement of beating degree of the pulp. Applying desirability function method, the optimal pretreatment conditions were found to be an enzyme dosage of 0.11 parts per thousand o.d., enzymatic contact time of 31.0 min, and pulp consistency of 4.50% o.d. The optimal pretreatment resulted in a maximum decrement of 10 units of beating degree, a decrease by 20% when compared with the control sample. The observed and predicted values of beating degrees were in close agreement. Results of fiber morphology analysis and physical property tests showed that the optimal pretreatment partially recovered the fiber flexibility and retained the strength properties of the handsheet even under the lower beating degree. Isothermal (Thermogravimetric Analyzer) TGA experiments of the fibers confirmed that the enzymatic pretreatment decreased the fiber hornification.