Improvement of TCF Bleaching of Olive Tree Pruning Residue Pulp by Addition of a Laccase and/or Xylanase Pre-Treatment

Martín‐Sampedro, Raquel; Rodríguez, Alejandro; Requejo, Ana; Eugenio, María E.

doi:10.15376/biores.7.2.1488-1503

Cited by 10 publications

(16 citation statements)

References 32 publications

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“…However, these enzymes do not act directly on the lignin as it is the case of laccases. In this context, not only a typical LMS ( M. thermophila laccase and acetosyringone as mediator) but also xylanases have been used separately or in combination to bleach soda pulps from olive tree pruning and oil palm . Saleem et al .…”

Section: Laccases As Versatile Enzymes: Traditional and New Industriamentioning

confidence: 99%

Laccases as versatile enzymes: from industrial uses to novel applications

Moreno

Ibarra²,

Eugenio³

et al. 2019

J of Chemical Tech & Biotech

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The application of enzymes offers an enormous potential in the improvement of existing industrial procedures and in the establishment of new processes for obtaining high-added value products. Enzymes provide cleaner and more efficient industrial processes and contribute to the sustainability concept. In this sense, laccases are very versatile biocatalysts currently used in food, textile and pulp and paper sectors among others. During the last years, scientific efforts have been diverted to the exploitation of such interesting enzymes in novel fields like lignocellulosic biorefineries, biosensors or enzymatic biofuel cells. This review provides a general vision of the use of laccase enzymes describing their main characteristics and mode of action. Furthermore, their current uses in industrial processes are summarized and the most novel potential application of laccases are revealed. The increasing interest on laccases is also demonstrated by the research efforts on enzyme engineering as it is detailed in this review. wileyonlinelibrary.com/jctb www.soci.org AD Moreno et al. J Chem Technol Biotechnol 2020; 95: 481-494

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Section: Laccases As Versatile Enzymes: Traditional and New Industriamentioning

confidence: 99%

Laccases as versatile enzymes: from industrial uses to novel applications

Moreno

Ibarra²,

Eugenio³

et al. 2019

J of Chemical Tech & Biotech

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“…It is worth highlighting in this section that apart from xylanases, the use of laccases has been used for the bleaching of alternative raw materials [80][81][82][83][84]. As it is known, these enzymes need a mediator to make the bleaching more effective since thanks to them they are able to oxidize not only the phenolic part but also the non-phenolic of the lignin.…”

Section: Biobleachingmentioning

confidence: 99%

“…The three laccase-mediator systems improve the bleaching sequence, with L-Tv + AS being the LMS that provides the highest delignification and improvement of optical properties. Finally, Martín-Sampedro et al [83] also bleached soda pulp from olive tree pruning using not only a typical LMS but also adding xylanase jointly or prior to LMS to study the effect of this enzyme on the characteristics of the bleached pulps. The best results are found when both enzymes are applied in the same stage.…”

Section: Biobleachingmentioning

confidence: 99%

Alternative Raw Materials for Pulp and Paper Production in the Concept of a Lignocellulosic Biorefinery

Eugenio¹,

Ibarra²,

Martín‐Sampedro³

et al. 2019

Cellulose

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The main source of cellulosic fibre used for pulp and paper production comes from wood, while non-wood fibres are used to a lesser extent. However, a renewed interest exists in the use of non-woody raw materials due to their abundance as source of low-cost fibres and because they are sometimes the only exploitable source of fibres in certain geographical areas, mainly in developing countries. Moreover, the great variety of characteristics, fibre dimensions and chemical composition of these alternative raw materials give them a great potential to produce different types of papers. On the other hand, the pulp and paper industry is an excellent starting point for the development of lignocellulosic biorefineries, possessing the necessary technology and infrastructure as well as extensive experience in lignocellulosic biomass transformation. Since its beginnings, the pulp and paper industry has been practicing certain aspects of the biorefinery concept, generating the energy necessary for the production of cellulosic pulp from the combustion of lignocellulosic waste and black liquors, recovering the chemical reagents used and generating high value-added products (e.g. tall oil) together with cellulosic pulp. However, the evolution of the pulp and paper industry to a lignocellulosic biorefinery requires technological innovations to make bioenergy and new bioproducts available alongside traditional products.

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“…These tree pruning residues, which include a main woody fraction and a remaining fraction consisting of leaves and thin branches, have been extensively evaluated for their valorization due to its high carbohydrates (cellulose and hemicellulose) content. Then, cellulose has been used for production of bioethanol [3], cellulosic pulp and advanced materials such as nanocellulose, among others [1,[4][5][6]. Hemicelluloses have been exploited for production of xylitol and xylooligosacharides [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, soda/anthraquinone (soda/AQ) pulping, with AQ as a pulping additive to limit the carbohydrate degradation [12], is generally used for agriculture residues [14]. In this sense, soda/AQ pulping has been extensively used to produce paper pulp from orange and olive tree pruning residues [1,6]. Although smaller volumes of soda lignin are produced annually (5000 tons) compared to kraft lignin [13], soda lignin is sulfur-free, which makes it more attractive for the production of bio-based products.…”

Section: Introductionmentioning

confidence: 99%

Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning Residues

et al. 2021

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Some agroforestry residues such as orange and olive tree pruning have been extensively evaluated for their valorization due to its high carbohydrates content. However, lignin-enriched residues generated during carbohydrates valorization are normally incinerated to produce energy. In order to find alternative high added-value applications for these lignins, a depth characterization of them is required. In this study, lignins isolated from the black liquors produced during soda/anthraquinone (soda/AQ) pulping of orange and olive tree pruning residues were analyzed by analytical standard methods and Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic resonance (solid state 13C NMR and 2D NMR) and size exclusion chromatography (SEC). Thermal analysis (thermogravimetric analysis (TGA), differential scanning calorimetry (DSC)) and antioxidant capacity (Trolox equivalent antioxidant capacity) were also evaluated. Both lignins showed a high OH phenolic content as consequence of a wide breakdown of β-aryl ether linkages. This extensive degradation yielded lignins with low molecular weights and polydispersity values. Moreover, both lignins exhibited an enrichment of syringyl units together with different native as well as soda/AQ lignin derived units. Based on these chemical properties, orange and olive lignins showed relatively high thermal stability and good antioxidant activities. These results make them potential additives to enhance the thermo-oxidation stability of synthetic polymers.

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Improvement of TCF Bleaching of Olive Tree Pruning Residue Pulp by Addition of a Laccase and/or Xylanase Pre-Treatment

Cited by 10 publications

References 32 publications

Laccases as versatile enzymes: from industrial uses to novel applications

Laccases as versatile enzymes: from industrial uses to novel applications

Alternative Raw Materials for Pulp and Paper Production in the Concept of a Lignocellulosic Biorefinery

Chemical, Thermal and Antioxidant Properties of Lignins Solubilized during Soda/AQ Pulping of Orange and Olive Tree Pruning Residues

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