Comparative study on application of T.lanuginosus SSBP xylanase and commercial xylanase on biobleaching of non wood pulps

Ziaie-Shirkolaee, Yaser; Talebizadeh, Alireza; Soltanali, Saeed

doi:10.1016/j.biortech.2008.02.032

Cited by 35 publications

(14 citation statements)

References 18 publications

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“…Reduction in kappa number indicates reduction in chlorine required for subsequent bleaching (Gupta et al, 2000). Commercially available Xylanase HS when used for biobleaching of bagasse and wheat straw pulp decreased kappa number by greater than one (Shirkolaee et al 2008). An increase of 5.3 and 14.5% in brightness and whiteness, respectively, and decrease of 9.7% in yellowness was obtained in enzyme-treated unbleached wheat straw pulp (Table 7).…”

Section: Optimization Of Enzyme Treatment Conditionsmentioning

confidence: 96%

“…Xylanases (1,4-b-D-xylan xylanohyrolase; EC 3.2.1.8) constitute one of the most important industrial enzyme that depolymerizes xylan molecule into xylose units and is produced by different microorganisms, including bacteria (Sanghi et al 2008;Lakshmi et al 2009;Garg et al 2011;Nagar et al 2010), fungi (Shirkolaee et al 2008;Camassola and Dillon 2010;Sanghvi et al 2010) and actinomycetes (Beg et al 2000;Bajaj and Singh 2010). In recent years, interest in xylanases have been increased due to their potential use in the pulp and paper industry, textile industry, food processing and wine industry (Hang and Woodams 1997;Csiszar et al 2006;Battan et al 2007Battan et al , 2008Dhiman et al 2008Dhiman et al , 2009.…”

Section: Introductionmentioning

confidence: 99%

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Xylanase production using agro-residue in solid-state fermentation from Bacillus pumilus ASH for biodelignification of wheat straw pulp

et al. 2011

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Two stage statistical design was used to optimize xylanase production from Bacillus pumilus ASH under solid-state fermentation. Initially, Plackett-Burman designing (PB) was used for the selection of crucial production parameters. Peptone, yeast extract, incubation time, moisture level and pH were found to be the crucial factors for the xylanase production. Crucial variables were further processed through central composite designing (CCD) of response surface methodology (RSM) to maximize the xylanase yield. Each significant factor was investigated at five different levels to study their influence on enzyme production. Statistical approach resulted in 2.19-fold increase in xylanase yield over conventional strategy. The determination coefficient (R (2)) as shown by analysis of variance (ANOVA) was 0.9992, which shows the adequate credibility of the model. Potential of cellulase-free xylanase was further investigated for biobleaching of wheat straw pulp. Xylanase aided bleaching through XCDED(1)D(2) sequence resulted in 20 and 17% reduction in chlorine and chlorine dioxide consumption as compared to control. Significant increase in pulp brightness (%ISO), whiteness and improvement in various pulp properties was also observed.

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Section: Optimization Of Enzyme Treatment Conditionsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Xylanase production using agro-residue in solid-state fermentation from Bacillus pumilus ASH for biodelignification of wheat straw pulp

et al. 2011

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“…These compounds are toxic, mutagenic, persistent, and bio-accumulated in the environment, causing numerous harmful disturbances in biological systems. Thus, there is a motivation to replace or supplement traditional bleaching with environmentally compatible procedures (Ziaie-Shirkolaee et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Biobleaching Effects of Crude Xylanase from Streptomyces griseorubens LH-3 on Eucalyptus Kraft Pulp

Cheng¹,

Chen²,

Huang³

et al. 2013

BioResources

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In this work, a xylanase-producing strain, Streptomyces griseorubens LH-3, was cultured, and the crude xylanase was prepared. Analysis of its enzymatic properties revealed that the crude xylanase possessed good thermal stability at temperatures below 60 o C, exhibited a wide pH range from 4.0 to 9.0, and was cellulase-free. This crude enzyme was used to treat eucalyptus kraft pulp, and the release of chromophores was the highest at the dosage of 20 IU g −1 dry pulp. Compared with the untreated group, biobleaching of eucalyptus kraft pulp with this enzyme increased the brightness of the pulp by 12.9% and reduced the Kappa number by 27.4%. Biobleaching of eucalyptus kraft pulp with this enzyme obtained the same final pulp brightness compared with that of the control; however, hydrogen peroxide consumption was reduced by 17% and the yield and viscosity of the pulp was increased by 1.47% and 1.53%, respectively. This crude xylanase has promising potential for industrial applications.

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“…23,49) Xylanase preparations suited to such an application should retain activity at elevated temperatures and alkaline pH and be free of cellulases. [50][51][52] Thermomyces lanuginosus is a thermophilic fungus that is a cellulase-free, single-xylanase producer. 13) A single xylanase from T. lanuginosus 195 has been purified 9.3-fold from a crude koji extract, with a specific activity of 6,182 U/mg of protein.…”

Section: Effect Of Supplemented Carbon Source On Xylanase Productionmentioning

confidence: 99%

Optimization of Xylanase Production byThermomyces lanuginosusin Solid State Fermentation

Gaffney

Doyle²,

Murphy

2009

Bioscience, Biotechnology, and Biochemistry

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Comparative study on application of T.lanuginosus SSBP xylanase and commercial xylanase on biobleaching of non wood pulps

Cited by 35 publications

References 18 publications

Xylanase production using agro-residue in solid-state fermentation from Bacillus pumilus ASH for biodelignification of wheat straw pulp

Xylanase production using agro-residue in solid-state fermentation from Bacillus pumilus ASH for biodelignification of wheat straw pulp

Biobleaching Effects of Crude Xylanase from Streptomyces griseorubens LH-3 on Eucalyptus Kraft Pulp

Optimization of Xylanase Production byThermomyces lanuginosusin Solid State Fermentation

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