Performance and efficiency of old newspaper deinking by combining cellulase/hemicellulase with laccase-violuric acid system

Xu, Qingyu; Fu, Yingjuan; Gao, Yang; Qin, Menghua

doi:10.1016/j.wasman.2008.10.007

Cited by 48 publications

(23 citation statements)

References 8 publications

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“…The combination of cellulase or hemicellulase with the laccase-violuric acid system has also been considered for deinking to produce pulps with improved physical and optical properties; the enzyme combination is anticipated to be highly efficient and have low environmental impact [9,160,167]. The work was based on the proposal that the combination of a xylanase stage followed by a laccase-gallic acid treatment may have a synergistic delignification effect [168].…”

Section: Sequential Xylanase and Laccase Applicationmentioning

confidence: 99%

Mixed Enzyme Systems for Delignification of Lignocellulosic Biomass

Woolridge

2014

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Abstract:The application of enzymes such as laccase and xylanase for the preparation of cellulose from lignocellulosic material is an option for those industries seeking to reduce the use of chlorine-containing bleach agents, thus minimizing the environmental impact of their processes. Mixed hydrolytic and oxidative enzyme systems have been well described in the context of biopulping, and thus provide good precedent regarding effectiveness, despite the susceptibility of xylanase to inactivation by laccase-generated oxidants. This paper examines the progress towards development of sequential and simultaneous mixed enzyme systems to accomplish delignification.

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Section: Sequential Xylanase and Laccase Applicationmentioning

confidence: 99%

Mixed Enzyme Systems for Delignification of Lignocellulosic Biomass

Woolridge

2014

Catalysts

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“…Dissolved lignin residues from wastepaper sludge are also known to be a type of surfactant (Xu et al, 2009). These surfactants typically serve as air-entraining admixtures in concrete (Ramachandran, 1995), which changes the porosity and pore size distribution of the matrix, resulting in a lower density mortar block.…”

Section: Compressive Strengthmentioning

confidence: 99%

Properties of wastepaper sludge in geopolymer mortars for masonry applications

Yan

Sagoe‐Crentsil

2012

Journal of Environmental Management

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“…7D, 7E, 8D, and 8E), which indicated that the simultaneous hydrolysis of endoglucanase and lipase on the fiber surface facilitated the release of fibrils. In general, the morphological changes of the fibers, like cracks and peeling, were observed in the enzyme-deinked pulps (Xu et al 2009). These morphological modifications enhanced the contact area between the pulp fiber surface, which may explain the improvement in the paper properties by the Lip/EG1CD mixture and chimera Lip-EG1CD treatment (Virk et al 2013).…”

Section: Scanning Electron Microscopy For Fiber Morphologymentioning

confidence: 98%

The Enzymatic Deinking of Waste Papers by Engineered Bifunctional Chimeric Neutral Lipase – Endoglucanase

Liu¹,

Long²,

Wu³

et al. 2017

BioResources

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Endoglucanase and lipase showed good deinking efficiency for waste papers. The performances could be greatly improved further by the combined use of the two enzymes. To reduce the enzyme production cost and enhance synergistic action of endoglucanase and lipase on laser-printed paper and newspaper, a chimeric enzyme with endoglucanase and lipase activity was constructed and expressed in Pichia pastoris. The data indicated that the chimera Lip-EG1CD improved the ink removal efficiencies and sheet brightness better than a single enzyme or a mixture of two enzymes. The chimera Lip-EG1CD demonstrated an 89% removal of toner on both papers and 91% ISO and 60% ISO sheet brightness for laser-printed paper and newspaper, respectively. Handsheet strength was also clearly improved. It revealed that the combined deinking of endoglucanase and lipase on waste papers could be strengthened by constructing proper chimera due to intramolecular synergistic action. This would be useful for developing an economical process for waste paper recycling.

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Performance and efficiency of old newspaper deinking by combining cellulase/hemicellulase with laccase-violuric acid system

Cited by 48 publications

References 8 publications

Mixed Enzyme Systems for Delignification of Lignocellulosic Biomass

Mixed Enzyme Systems for Delignification of Lignocellulosic Biomass

Properties of wastepaper sludge in geopolymer mortars for masonry applications

The Enzymatic Deinking of Waste Papers by Engineered Bifunctional Chimeric Neutral Lipase – Endoglucanase

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