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Published in: Cellulose 9/2019

08-05-2019 | Original Research

Overcoming the drying-induced pore closure of APMP poplar fibers in old newsprint by surfactant treatment to promote enzymatic hydrolysis of the cellulose

Authors: Wenxuan Mo, Bo Li, Yaping Li, Yue Li, Shubin Wu

Published in: Cellulose | Issue 9/2019

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Abstract

This study analyzed the hornification properties of the old newsprint fiber and its effects on the enzymatic hydrolysis and investigated the strategy for improving the hydrolysis efficiency. The results showed both of heating and vacuum can dry the fibers and cause hornification, which resulted in a significant decrease in the pore volume and the enzymatic saccharification efficiencies. A good linear relationship was presented between the enzymatic digestibility and the pore volume of the drying-induced hornified fibers from the two drying methods. The high content of lignin in this kind of hornified fiber aggravated the inhibition of hornification on the enzymatic saccharification of cellulose through physical barriers blocking cellulase to contact the partial surface of hornified cellulose. Moreover, the strategy of using surfactants to enhance enzymatic hydrolysis was preliminarily explored. The results showed that enzymatic saccharification of the hornified lignin-containing fiber was significantly improved after the addition of surfactants. The increase in glucose yield reached the maximum value of 7.15 g/L after adding PEG 8000. Anionic surfactants exhibited the similar effects but weaker than the non-ionic ones. And the most effective time of the surfactants applied to hornified fibers was postponed from 6 to 12 h as the fiber hornification degree increased. This study provides a meaningful complement for the research work of enzymatic hydrolysis of recycled fiber.

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Literature
go back to reference China Paper Association (2017) 2017 Annual report of China’s Paper Industry. Beijing China Paper Association (2017) 2017 Annual report of China’s Paper Industry. Beijing
go back to reference Sluiter A, Hames B, Ruiz RO, Scarlata C, Sluiter J, Templeton D (2008) Determination of structural carbohydrates and lignin in biomass. National Renewable Energy Laboratory Sluiter A, Hames B, Ruiz RO, Scarlata C, Sluiter J, Templeton D (2008) Determination of structural carbohydrates and lignin in biomass. National Renewable Energy Laboratory
Metadata
Title
Overcoming the drying-induced pore closure of APMP poplar fibers in old newsprint by surfactant treatment to promote enzymatic hydrolysis of the cellulose
Authors
Wenxuan Mo
Bo Li
Yaping Li
Yue Li
Shubin Wu
Publication date
08-05-2019
Publisher
Springer Netherlands
Published in
Cellulose / Issue 9/2019
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-019-02471-4

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