Biomechanical pulping of softwood with enzymes and white-rot fungus Physisporinus rivulosus

Maijala, Pekka; Kleen, Marjatta; Westin, Christoffer; Poppius-Levlin, Kristiina; Herranen, K.; Lehto, Jouko; Reponen, P.; Mäentausta, O.; Mettälä, Aila; Hatakka, Annele

doi:10.1016/j.enzmictec.2007.11.017

Cited by 58 publications

(33 citation statements)

References 18 publications

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“…The surface roughness was improved because the middle lamella, primary wall and outer layer of secondary wall were broken. Maijala et al (2008) tested 100 U.g -1 of MnP produced by Bjerkandera adusta from JenaBiosGmbH(Germany), laccase produced by Trametes versicolor, and pectinase (Aspergillus) from Fluka (Germany). The consumption of energy for refining was examined with a laboratory low-intensity refiner after 6-h enzyme treatments.…”

Section: Mechanical Pulpsmentioning

confidence: 99%

Enzymatic approaches in paper industry for pulp refining and biofilm control

Torres

Negro

Fuente

et al. 2012

Appl Microbiol Biotechnol

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The use of enzymes has a high potential in the pulp and paper industry to improve the economics of the paper production process and to achieve, at the same time, a reduced environmental impact. Specific enzymes contribute to reduce the amount of chemicals and energy required for the modification of fibers and helps to prevent the formation or development of biofilms. This review is aimed at presenting the latest progresses made in the application of enzymes as refining aids and biofilm control agents.

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Section: Mechanical Pulpsmentioning

confidence: 99%

Enzymatic approaches in paper industry for pulp refining and biofilm control

Torres

Negro

Fuente

et al. 2012

Appl Microbiol Biotechnol

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“…White-rot fungi are able to oxidize lignin efficiently while degrading lignocellulose [1][2][3]. Use of lignin degrading fungi and their oxidative enzymes has been intensively studied for many potential applications such as biopulping, bleaching of chemical pulps and detoxification of waste waters or production of bio-based chemicals [2,[4][5][6]. The possibility to use fungi and their enzymes in the pretreatment of lignocellulose before enzymatic saccharification of cellulose [7,8] and further for the production of bioethanol, has also gained much interest due to the depletion of fossil fuels and general demand for eco-friendly alternatives in sustainable economy.…”

Section: Introductionmentioning

confidence: 99%

Improved Efficiency in Screening for Lignin-Modifying Peroxidases and Laccases of Basidiomycetes

Kinnunen

Maijala

Järvinen

et al. 2017

CBIOT

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Abstract:Background: Wood rotting white-rot and litter-decomposing basidiomycetes form a huge reservoir of oxidative enzymes, needed for applications in the pulp and paper and textile industries and for bioremediation.Objective: The aim was (i) to achieve higher throughput in enzyme screening through miniaturization and automatization of the activity assays, and (ii) to discover fungi which produce efficient oxidoreductases for industrial purposes.Methods: Miniaturized activity assays mostly using dyes as substrate were carried out for lignin peroxidase, versatile peroxidase, manganese peroxidase and laccase. Methods were validated and 53 species of basidiomycetes were screened for lignin modifying enzymes when cultivated in liquid mineral, soy, peptone and solid state oat husk medium.Results: Manganese peroxidases were the most common enzymes produced by 96% of the species. They typically had acidic pH optima, although Hyphodontia sp., Pleurotus pulmonarius and Trametes ochracea produced enzymes highly active at pH 7. Versatile peroxidase was produced by 66% of the fungi with efficient production from Phlebia radiata, P. pulmonarius and Galerina marginata. Novel lignin peroxidase producing fungi Cylindrobasidium evolvens and Daedaleopsis septentrionalis were found among the 26% of the species showing here lignin peroxidase production. Laccase was shown in 92% of the species. Several fungi produced laccase active at pH 7, which is noteworthy because usually laccases of white-rot fungi are efficient and relevant for many industrial applications. Conclusion:Automated screening allowed us to monitor many specific enzyme activities and extend the range of assay conditions from relatively small fungal cultivation sample volumes.

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“…After wood is debarked, chipped and screened, wood chips are briefly steamed to reduce natural chip microorganisms, cooled with air, and inoculated with the biopulping fungus for 1 to 4 weeks prior to further processing. The biopulping has been indicated as a technology technologically feasible and economically beneficial [193].…”

Section: Biopulping and Wood Utilizationmentioning

confidence: 99%

Lignocelluloses Feedstock Biorefinery as Petrorefinery Substitutes

Cheng¹,

Wang²

2013

Biomass Now - Sustainable Growth and Use

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Lignocelluloses Feedstock Biorefinery as Petrorefinery Substitutes 349The LCF Biorefinery is a promising alternative due to the abundance and variety of available raw materials and the good position of the conversion products on the market [14]. Its profitability is also dependent on the technology employed to alter the structure of lignocellulosic biomass in order to produce high value co-products from its three main fractions i.e. cellulose, hemicellulose, and lignin [15].Currently the main feedstock for biorefineries is still based on starch. The practiced technologies in fuel ethanol industry are primarily based on the fermentation of sugars derived from starch and sugar crops, which are quite mature with little possibility of process improvements. However, using starch and sugar crops to produce ethanol also has been questioned since it draws its feedstock from a food stream. Lignocellulosic biomass is a more promising renewable resource as it is available in large quantities and does not compete with food or feed. Lignocellulosic biomass is a renewable resource that stores energy from sunlight in its chemical bonds, with great potentials for the production of affordable fuel ethanol [16,17]. Its main obstacle for a major breakthrough is the high production costs for bioenergy products.On the other hand, lignocellulosic biomass-derived products can significantly reduce green house gas emissions, compared to fossil-based products. Also, many common petrochemicals could be obtained with lower green house gas emissions from bio-based feedstocks. The maturity and economics of the conversion processes and logistics is a major challenge for lignocellulosic biomass [18].

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Biomechanical pulping of softwood with enzymes and white-rot fungus Physisporinus rivulosus

Cited by 58 publications

References 18 publications

Enzymatic approaches in paper industry for pulp refining and biofilm control

Enzymatic approaches in paper industry for pulp refining and biofilm control

Improved Efficiency in Screening for Lignin-Modifying Peroxidases and Laccases of Basidiomycetes

Lignocelluloses Feedstock Biorefinery as Petrorefinery Substitutes

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