High consistency cellulase treatment of hardwood prehydrolysis kraft based dissolving pulp.
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.
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. Electronic address: wangqiang8303@163.com.
Qiang
Q
Wang
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.
Shanshan
S
Liu
Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China.
Guihua
G
Yang
Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China.
Jiachuan
J
Chen
Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada. Electronic address: yonghao@unb.ca.
Yonghao
Y
Ni
D000327:Adsorption; D000468:Alkalies / Q000494:pharmacology; D002480:Cellulase / Q000494:pharmacology*; D002482:Cellulose / Q000378:metabolism; D006868:Hydrolysis; D008970:Molecular Weight; D010209:Paper; D012995:Solubility; D014783:Viscosity; D014934:Wood / Q000187:drug effects*
D000468:Alkalies; D002482:Cellulose; D002480:Cellulase
Cellulase; Dissolving pulp; Fock reactivity; High consistency; Viscosity