高浓度纤维素酶处理硬木预水解硫酸盐法制溶解浆。
High consistency cellulase treatment of hardwood prehydrolysis kraft based dissolving pulp.
机构信息
Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China; Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China; Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
出版信息
Bioresour Technol. 2015;189:413-416. doi: 10.1016/j.biortech.2015.04.069. Epub 2015 Apr 23.
For enzymatic treatment of dissolving pulp, there is a need to improve the process to facilitate its commercialization. For this purpose, the high consistency cellulase treatment was conducted based on the hypothesis that a high cellulose concentration would favor the interactions of cellulase and cellulose, thus improves the cellulase efficiency while decreasing the water usage. The results showed that compared with a low consistency of 3%, the high consistency of 20% led to 24% increases of cellulase adsorption ratio. As a result, the viscosity decrease and Fock reactivity increase at consistency of 20% were enhanced from 510 mL/g and 70.3% to 471 mL/g and 77.6%, respectively, compared with low consistency of 3% at 24h. The results on other properties such as alpha cellulose, alkali solubility and molecular weight distribution also supported the conclusion that a high consistency of cellulase treatment was more effective than a low pulp consistency process.
对于溶解浆的酶处理，需要改进该工艺以促进其商业化。为此，基于纤维素浓度越高有利于纤维素酶与纤维素相互作用的假设，进行了高浓纤维素酶处理，从而提高了纤维素酶的效率，同时减少了用水量。结果表明，与低浓度 3%相比，高浓度 20%使纤维素酶吸附率提高了 24%。因此，与低浓度 3%相比，在 24 小时时，高浓度 20%的粘度降低和福克反应性增加分别从 510mL/g 和 70.3%提高到 471mL/g 和 77.6%。其他性质如α纤维素、碱溶性和分子量分布的结果也支持这样的结论，即高浓纤维素酶处理比低浆浓处理更有效。
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