Recycling cellulase towards industrial application of enzyme treatment on hardwood kraft-based dissolving pulp

Qiang Wang; Shanshan Liu; Guihua Yang; Jiachuan Chen; Xingxiang Ji; Yonghao Ni

doi:10.1016/j.biortech.2016.04.048

Recycling cellulase towards industrial application of enzyme treatment on hardwood kraft-based dissolving pulp

Bioresour Technol. 2016 Jul:212:160-163. doi: 10.1016/j.biortech.2016.04.048. Epub 2016 Apr 13.

Authors

Qiang Wang¹, Shanshan Liu², Guihua Yang³, Jiachuan Chen³, Xingxiang Ji⁴, Yonghao Ni⁵

Affiliations

¹ Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province 510640, China; Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada. Electronic address: wangqiang8303@163.com.
² Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province 510640, China; Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
³ Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China.
⁴ Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province 510640, China.
⁵ Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.

PMID: 27099940
DOI: 10.1016/j.biortech.2016.04.048

Abstract

Cost-effectiveness is vital for enzymatic treatment of dissolving pulp towards industrial application. The strategy of cellulase recycling with fresh cellulase addition was demonstrated in this work to activate the dissolving pulp, i.e. decreasing viscosity and increasing Fock reactivity. Results showed that 48.8-35.1% of cellulase activity can be recovered from the filtered liquor in five recycle rounds, which can be reused for enzymatic treatment of dissolving pulp. As a result, the recycling cellulase with addition fresh cellulase of 1mg/g led to the pulp of viscosity 470mL/g and Fock reactivity 80%, which is comparable with cellulase charge of 2mg/g. Other pulp properties such as alpha-cellulose, alkaline solubility and molecular weight distribution were also determined. Additionally, a zero-release of recycling cellulase treatment was proposed to integrate into the dissolving pulp production process.

Keywords: Cellulase treatment; Cost effectiveness; Dissolving pulp; Recycling.

MeSH terms

Cellulase / chemistry*
Cellulose / chemistry*
Molecular Weight
Recycling / methods*
Solubility
Viscosity
Wood / chemistry*

Substances

Cellulose
Cellulase