Enhanced enzymatic digestibility of poplar wood by quick hydrothermal treatment

Liping Tan; Zhongyang Liu; Tongtong Zhang; Zhaojiang Wang; Tongjun Liu

doi:10.1016/j.biortech.2020.122795

Enhanced enzymatic digestibility of poplar wood by quick hydrothermal treatment

Bioresour Technol. 2020 Apr:302:122795. doi: 10.1016/j.biortech.2020.122795. Epub 2020 Jan 11.

Authors

Liping Tan¹, Zhongyang Liu², Tongtong Zhang³, Zhaojiang Wang³, Tongjun Liu⁴

Affiliations

¹ State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; Shandong Provincial Key Laboratory of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
² Shandong Provincial Key Laboratory of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
³ State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
⁴ State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; Shandong Provincial Key Laboratory of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China. Electronic address: liutongjun@outlook.com.

PMID: 32004810
DOI: 10.1016/j.biortech.2020.122795

Abstract

To elevate the glucose yield from the enzymatic hydrolysis of poplar wood for bio-ethanol production, quick hydrothermal treatment (QHT) was conducted at 200 °C for a short period of time from 5 min to 25 min. It was found that the QHT could remove >85% of the hemicelluloses and ~30% of the lignin in the poplar wood, and achieve 82% cellulose conversion at a low cellulase dosage of 10 FPU/g substrate. The enhancement digestibility of poplar wood was ascribed to the higher accessibility of cellulose, as the specific surface area of the substrate increased from 3.0 m²/g to 7.1 m²/g from the of untreated wood to the QHT-treated wood. The results demonstrate the improvements in digestibility and hydrolysis rates after QHT.

Keywords: Enzymatic hydrolysis; Physical structure; Poplar wood; Quick hydrothermal treatment; Specific surface area.

MeSH terms

Cellulase*
Hydrolysis
Lignin
Populus*
Wood

Substances

Lignin
Cellulase