Improved surface properties of CTMP fibers with enzymatic pretreatment of wood chips prior to refining

Liu, Xiaochun; Zhao, Yu; Li, Kecheng; Pelletier, Andre

doi:10.1007/s10570-012-9792-3

Cited by 19 publications

(7 citation statements)

References 10 publications

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“…Chemical treatments (e.g., by using hydrogen sulfite (HSO 3 )) can also be applied to TMP during the steaming stage for further modifications to form CTMP (Ekstrand et al, 2013). In recent years, some studies have been carried out to optimize the CTMP which produces fibers by biological (e.g., Lei et al, 2012) or chemical pre-treatment (e.g., Pan et al, 2013) of wood chips prior to refining. Chemical pre-processing of the raw materials, before exposing to mechanical pulping, is another common way to increase the efficiency of the process which is called CMP.…”

Section: Pandp From Virgin Fiber -Production Techniquesmentioning

confidence: 99%

Review on recent developments on pulp and paper mill wastewater treatment

Kamali

Khodaparast

2015

Ecotoxicology and Environmental Safety

438

246

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Section: Pandp From Virgin Fiber -Production Techniquesmentioning

confidence: 99%

Review on recent developments on pulp and paper mill wastewater treatment

Kamali

Khodaparast

2015

Ecotoxicology and Environmental Safety

438

246

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“…It allows for loosening the structure of lignocelluloses without utilizing and releasing environmentally harsh chemicals. In fact, the biological pretreatment has been used to pretreat wood in the pulping process to save energy as well as to improve the pulp quality (Lei et al 2012;Masarin et al 2009;Vicentim et al 2009). In addition, the utilization of biological pretreatment for the production of biofuels has received increasing attention nowadays.…”

Section: Introductionmentioning

confidence: 99%

Effect of Biological Pretreatment with White-rot Fungus Trametes hirsuta C7784 on Lignin Structure in Carex meyeriana Kunth

Mao

Zhang

et al. 2013

BioResources

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Carex meyeriana Kunth was subjected to biological pretreatment with the white-rot fungus Trametes hirsuta C7784, and the structural changes of the lignin were investigated. Results showed that there was a slight decrease in carbohydrate content after pretreatment for 3 weeks, but a noticeable decrease in lignin and carbohydrate contents after 6 weeks. Detail structural analysis of the isolated lignin from the samples revealed that Carex meyeriana Kunth lignin consisted mainly of p-hydroxyphenyl (H), guaiacyl (G), and syringyl (S) units with minor p-coumarate and ferulate units. The predominant lignin interunits were β-O-4´ ether linkages, followed by phenylcoumaran, together with a lower portion of resinol and tricin substructures. After pretreatment for 6 weeks, the contents of β-β´ and β-5´ linkages notably decreased, suggesting that the fungus preferentially attacked these linkages. The pretreatment led to an increase of S/G ratio from 0.64 in the control to 0.83 in the sample pretreated for 6 weeks. The comprehensive understanding of the structural changes of lignin offers new insights into the biological degradation of Carex meyeriana Kunth by white-rot fungus.

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“…When the enzyme dosage is 20 U/g, the pulp yield is 86.0%, which is a decrease of 1.3% compared with the control sample. The removal of xylan using xylanase results in loosened structures and increased porosity [30]. As the xylanase dosage is increased, the reaction between xylanase and xylan is promoted.…”

Section: Resultsmentioning

confidence: 99%

Effects of Xylanase Pretreatment on the Quality of Refiner Mechanical Mulberry Branch Fibers

Tao

Guo

Meng

et al. 2019

Advances in Polymer Technology

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We performed xylanase pretreatment prior to mechanical refining in the production of mulberry branch fibers, with the objective of saving energy and studying the effects of such pretreatment on the quality of the fibers. To determine the effects of the enzyme action, we analyzed the energy required for refining, related yield, and the dimension, deformation, and morphology of the fibers. We found that, with the xylanase pretreatment, the refining energy was reduced by 4%, with the yield of fibers being maintained at >85%. In addition, the fiber bundles were defibered further, resulting in reduced average length of the fiber. Furthermore, the fiber widths increased because of the improved swelling effect of the xylanase pretreatment. However, in some instances, the fine elements were reduced. With a low enzyme dosage, the fiber coarseness decreased remarkably and, because of the swelling and softening effects of the xylanase pretreatment on the mulberry branches, the fiber kink ratios and curl were reduced. Additionally, the mulberry branch tissue was loosened, facilitating fiber separation. In view of these findings, the biomechanical process could be a potentially green and efficient process for the manufacturing of mulberry branch fibers.

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Improved surface properties of CTMP fibers with enzymatic pretreatment of wood chips prior to refining

Cited by 19 publications

References 10 publications

Review on recent developments on pulp and paper mill wastewater treatment

Review on recent developments on pulp and paper mill wastewater treatment

Effect of Biological Pretreatment with White-rot Fungus Trametes hirsuta C7784 on Lignin Structure in Carex meyeriana Kunth

Effects of Xylanase Pretreatment on the Quality of Refiner Mechanical Mulberry Branch Fibers

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