Enzymatic approaches in paper industry for pulp refining and biofilm control

Torres, Claudia; Negro, Carlos; Fuente, Elena; Blanco, Ángeles

doi:10.1007/s00253-012-4345-0

Cited by 62 publications

(25 citation statements)

References 62 publications

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“…This in turn loosens the 3D structure of fibers, which become more flexible and form paper with more compact structure and high strength [7]. The main objective of application of enzymatic preparations for pulps treatment is to reduce refining energy and make the process not only less expensive but also more environmentally friendly [8]. However, enzymatic treatment must not lead to deterioration of paper properties and therefore selection of suitable enzyme preparations is of key importance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cellulases and Xylanases on Refining Process and Kraft Pulp Properties

et al. 2016

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Samples of bleached kraft pine cellulosic pulp, either treated with an enzyme preparation (a Thermomyces lanuginosus xylanase, an Aspergillus sp. cellulase, and a multienzyme preparation NS-22086 containing both these activities) or untreated, were refined in a laboratory PFI mill. The treatment with cellulases contained in the last two preparations significantly improved the pulp’s susceptibility to refining (the target freeness value of 30°SR was achieved in a significantly shorter time), increased water retention value (WRV) and fines contents while the weighted average fiber length was significantly reduced. These changes of pulp parameters caused deterioration of paper strength properties. The treatment with the xylanase, which partially hydrolyzed xylan, small amounts of which are associated with cellulose fibers, only slightly loosened the structure of fibers. These subtle changes positively affected the susceptibility of the pulp to refining (refining energy was significantly reduced) and improved the static strength properties of paper. Thus, the treatment of kraft pulps with xylanases may lead to substantial savings of refining energy without negative effects on paper characteristics.

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Section: Introductionmentioning

confidence: 99%

Effect of Cellulases and Xylanases on Refining Process and Kraft Pulp Properties

et al. 2016

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“…The use of substances that reduce reliance on antimicrobial agents, such as enzymes also known as "green chemicals," would be an attractive strategy (Bajpai, 2012;Simoes et al, 2010). Enzymes have been evaluated by several researchers in both the laboratory and in paper process streams for control of microbiological slime deposits (Anonymous, 1984(Anonymous, , 1990aAnstey et al, 1998a,b;Fischer and Baurich, 1999;Freis, 1984;Galon, 1997;Gould, 1998;Hagelsieb et al, 1996;Hagelsieb et al, 1999;Hart, 2001;Jaquess, 1994;Kanto and Brutar, 1996;Kupfer and Baurich, 1999;Lindvall, 1998b;Siika-aho et al, 2000;Schuetz and Wollenweber, 1999;Van Haute, 1997b;Benard, 2010;Rivera and Jara, 2007;Loosvelt and Datweiler, 2007;Xu, 2005;Paice and Zhang, 2005;Buchert et al, 2004;Bajpai, 2012;Bajpai and Bajpai, 2001;Grant, 1998;Johnsrud, 1997;Torres et al, 2011Torres et al, , 2012Schenker et al, 1997;Moor and Hatch, 1984;Patterson, 1986;Colasurdo and Wilton, 1988;Hatch and Moore, 1984;Augustin et al, 2004). Table 8.31 shows the characteristics and advantages of enzymatic "green" biocide.…”

Section: Enzyme Usementioning

confidence: 99%

The Control of Microbiological Problems∗∗Some excerpts taken from Bajpai P (2012). Biotechnology for Pulp and Paper Processing with kind permission from Springer Science1Business Media.

Bajpai

2015

Pulp and Paper Industry

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“…Initial one-electron oxidations of the dominating non-phenolic lignin units presuppose redox potentials of E 0 > 1.5 V taken vs. normal hydrogen electrodes (NHE) [17]. This catalytic potential is afforded by lignin peroxidases and versatile peroxidases of certain wood-decaying basidiomycete fungi (E 0 = 1.4-1.5 V).…”

Section: Introductionmentioning

confidence: 99%

Formation of the Azodication (ABTS2+) from ABTS [2,2′-Azinobis-(3-ethylbenzothiazoline-6-sulphonate)] in Sterile Plant Cultures: Root–Exuded Oxidoreductases Contribute to Rhizosphere Priming

Gramss

2018

Soil Systems

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Abstract:Rhizosphere priming by terrestrial plants comprises increased or repressed efflux of CO 2 and N from soil organic matter (SOM), decaying under the impact of temperature, moisture, and the composition of rhizodeposits. Contemporarily, increases in water solubility vs. losses in molecular size, aromaticity, and the content in phenolic OH groups denote the degradation of SOM in planted soil. Root peroxidases (POs) and 'polyphenoloxidases' are surmised to contribute to these effects, however, final evidence for this is lacking. Therefore, seedlings of white mustard, alfalfa, and oilseed rape with wide spans in PO release were grown in hydroponic cultures at variable levels of Cu/Fe/Mn as Fenton metals, but also under P and Fe starvation to stimulate the release of carboxylic acids that form catalytic Mn 3+ chelants from Mn 2+ and MnO 2 . The shortage in active oxygen as a cosubstrate of POs delayed the immediate oxidation of 2,2 -azinobis-(3-ethylbenzothiazoline-6-sulphonate) (ABTS) supplements to the green ABTS •+ by PO/H 2 O 2 , the possible formation of Mn 3+ via PO catalyzed aryloxy radicals from root-released phenolics, and of HO • by metal cations in H 2 O 2 dependent Fenton-like reactions. Enhanced by exuded and external malate, O 2 independent MnO 2 supplements in some treatments formed ABTS •+ spontaneously. The culture fluids then turned red in all treatments within 24-60 h by the formation of azodication (ABTS 2+ ) derivatives in a second plant initiated oxidation step that is known to be catalyzed by substrate radicals. It is concluded that plants initiate oxidative activities that contribute to rhizosphere priming in an environment of oxidoreductase and carboxylate exudates, the indicated presence of mediating substrate radicals, and the cations and (hydr)oxides of transition metals. Pathways of H 2 O 2 production upon the degradation of carboxylates and by the POs themselves are indicated.

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Enzymatic approaches in paper industry for pulp refining and biofilm control

Cited by 62 publications

References 62 publications

Effect of Cellulases and Xylanases on Refining Process and Kraft Pulp Properties

Effect of Cellulases and Xylanases on Refining Process and Kraft Pulp Properties

The Control of Microbiological Problems∗∗Some excerpts taken from Bajpai P (2012). Biotechnology for Pulp and Paper Processing with kind permission from Springer Science1Business Media.

Formation of the Azodication (ABTS2+) from ABTS [2,2′-Azinobis-(3-ethylbenzothiazoline-6-sulphonate)] in Sterile Plant Cultures: Root–Exuded Oxidoreductases Contribute to Rhizosphere Priming

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