Effect of xylanases on refining process and kraft pulp properties

Buzała, Kamila Przybysz; Kalinowska, Halina; Borkowski, Jędrzej; Przybysz, Piotr

doi:10.1007/s10570-017-1609-y

Cited by 18 publications

(7 citation statements)

References 19 publications

(19 reference statements)

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“…6e). Therefore, since dosed at identical endoglucanase activities based on cellopentaose, this indicates the important role of this activity in refining in accordance with some previous studies (Pere et al 1997). Furthermore, the fact that the release of reducing sugars cannot be used as a parameter for dosing refining enzymes was confirmed similarly to what was previously reported in several studies (Gil et al 2009;Wu et al 2020).…”

Section: Effect Of Enzyme Formulations and Purified Endoglucanases On Refiningsupporting

confidence: 89%

“…The highest protein concentrations were measured in EnzC (254 mg mL -1 ) followed by EnzB (176 mg mL -1 ), while EnzA exhibited the lowest protein concentration of 27.1 mg mL -1 . All enzyme preparations showed endoglucanase activity which has been reported to play a major role in refining of pulps (Pere et al 1997). However, activities measured on the endoglucanase specific CellG5 substrate (derivatized cellopentaose) varied over a wide range from 1.3 nkat mg -1 (EnzA) to 13.7 nkat mg -1 for EnzC (Fig.…”

Section: Comparison Of Refining Enzyme Formulationsmentioning

confidence: 89%

“…Xylanases are also able to reduce the refining energy to reach a certain degree of refining. However, some xylanases also negatively affected paper properties depending on the rate of degradation of hemicelluloses (Przybysz Buzała et al 2018). Laccases aid the refining process though degradation of lignin and increasing the amount of carboxyl groups, thus leading to increased bonding of fibres (Lin et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Biorefining: the role of endoglucanases in refining of cellulose fibers

et al. 2021

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With an annual production of more than 400 million tons, paper is the main product of the largest biorefinery process industrially implemented. Enzymes have been used for pulp refining to dramatically reduce energy consumption. However, exact mechanisms related to the individual enzymes are hardly understood. Yet, this knowledge would be important to predict enzyme performance in industrial processes. Three commercial refining enzyme formulations showed different endoglucanase (1.25 nkat mg−1–13.7 nkat mg−1), β-glucosidase (0.57 nkat mg−1–1.34 nkat mg−1) and xylanase activities (1.78 nkat ml−1–62.1 nkat mg−1) on model substrates. Additionally, distinct amounts of reducing sugars from hardwood sulfate pulp were released. Endoglucases were purified from each formulation by using hydrophobic interaction and anion exchange chromatography and showed molecular weights from 20 to 55 kDa and specific activities ranging between 3.11 and 26.3 nkat mg−1 according to endoglucanase specific derivatized cellopentaose (CellG5). Refining trials of hardwood sulfate pulp were conducted using a PFI laboratory mill and fiber properties such as degree of refining or fiber length and properties of formed sheets like tensile index were monitored. Thereby, enzymes were dosed based on identical endoglucanase activity on CellG5. Enzyme formulations and purified endoglucanases led to an increase of the degree of refining of up to 47.9 [°SR] at 6000 PFI revolutions while the tensile index was improved by up to 76.0 Nm g−1. In summary, refining effects can be primarily attributed to endoglucanases indicating activity on CellG5 being a suitable parameter for enzyme dosing.

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Section: Effect Of Enzyme Formulations and Purified Endoglucanases On Refiningsupporting

confidence: 89%

Section: Comparison Of Refining Enzyme Formulationsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Biorefining: the role of endoglucanases in refining of cellulose fibers

et al. 2021

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“…Nilai derajat giling pulp A. mangium cenderung lebih rendah dibandingkan E. pellita, derajat giling pulp A. mangium sekitar 570-590 mLCSF sedangkan E. pellita sekitar 630-640 mLCSF. Derajat giling yang tinggi cenderung memerlukan energi yang lebih besar untuk menurunkan nilai derajat gilingnya agar laju penghilangan airnya sesuai dengan target yang diharapkan (Buzała et al, 2018). Pulp A. mangium memerlukan jumlah putaran sekitar 4.900-5.200 dan E. pellita sekitar 5.200-5.300 untuk mencapai nilai derajat giling yang sama (300 mL CSF).…”

Section: Derajat Giling (Freeness)unclassified

Pengaruh Alkali Aktif terhadap Karakteristik Pulp Kraft Putih Acacia mangium dan Eucalyptus pellita

Kardiansyah

Sugesty

2020

J selulosa

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Industri pulp Indonesia saat ini memiliki masalah dalam penyediaan bahan baku kayu Acacia mangium, karena serangan penyakit tanaman dan hama. Hal ini harus diantisipasi melalui bahan baku alternatif pengganti Acacia mangium, spesies Eucalyptus pellita dipilih karena lebih tahan terhadap hama dan penyakit. Penelitian ini dilakukan untuk mengetahui karakteristik kualitas pulp kraft putih E. Pellita. Penelitian pembuatan pulp kertas dilakukan dengan proses kraft dengan bahan baku A. mangium dan E. pellita. Pemasakan dilakukan dengan variasi alkali aktif 16-20%, sulfiditas 28,7%, pada suhu 165 °C, rasio larutan pemasak terhadap kayu 3,5:1 dan faktor H 1.022. Pemutihan pulp dilakukan dengan proses ECF (Elemental Chlorine Free) dengan tahapan OD0EoD1. Karakteristik pulp kraft hasil pemasakan A. mangium lebih tinggi pada parameter rendemen tersaring, bilangan kappa dan viskositas dibandingkan dengan E. pellita. Penggunaan alkali aktif 16% pada pemasakan A. mangium lebih rendah dari E. pellita (18%), namun kualitasnya dapat memenuhi spesifikasi kualitas pulp kraft putih sesuai SNI 6107:2015 (Pulp Kraft Putih Kayu daun) pada parameter derajat giling, derajat putih dan sifat fisik. Karakteristik pulp kraft putih A. mangium lebih tinggi pada parameter derajat giling, derajat putih dan sifat fisik dibandingkan dengan E. pellita. Namun demikian E. pellita berpotensi untuk dikembangkan di Hutan Tanaman Industri sebagai bahan baku pulp.Effect of Active Alkali on Characteristic of Acacia mangium and Eucalyptus pellita Bleached Kraft PulpAbstractThe Indonesian pulp industry currently has problems in supplying Acacia mangium wood raw materials, due to plant disease and pest attacks. This could be anticipated through alternative raw materials to substitute Acacia mangium, the Eucalyptus pellita species chosen because it is more resistant to pests and diseases. This study was conducted to determine the quality characteristics of E. Pellita bleached kraft pulp. The research on making paper pulp using A. mangium and E. pellita was carried out by means of the kraft process. The cooking was carried out with a variation of 16-20% active alkali, 28.7% sulfidity, at a temperature of 165°C, a liquor to wood ratio of 3.5:1 and an H factor of 1.022. The bleaching of the pulp has been carried out using the ECF (Elemental Chlorine Free) process with the OD0EoD1 stage. Characteristics of kraft pulp from A. mangium cooking were higher in the screening yield, kappa number and viscosity compared to E. Pellita. The use of 16% active alkaline in cooking of A. mangium is lower than E. pellita (18%), but the quality can meet the quality specifications of white kraft pulp according to SNI 6107: 2015 (White Kraft Leaf Wood Pulp) on the parameters of milled degree, whiteness and properties. The characteristics of A. mangium white kraft pulp were higher in parameters of grind degree, whiteness and physical properties compared to E. pellita. However, E. pellita has the potential to be developed in Industrial Plantation Forests as raw material for pulp.

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“…Studies have shown that the tensile index and energy absorption of the xylanase-treated wheat straw do not increase; however, its tear index decreases significantly [ 19 ]. Xylanase enhances the bleaching process and has a positive impact on pulp, paper and wastewater treatment, aiming to reduce the use of bleaching chemicals in the pulp refining process [ 6 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Construction and Characterization of Fitting Equations for a New Wheat Straw Pulping Method

Liang,

Wei,

et al. 2023

Polymers

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The pretreatment of pulp with enzymes has been extensively studied in the laboratory. However, due to cost constraints, the application of enzymes in the pulp and paper industry is very limited. In this paper, an environment-friendly and efficient pulping method is proposed as an alternative to traditional pulping and papermaking methods. This new method overcomes the low efficiency and extreme pollution problems associated with traditional pulping methods. In addition, fitting equations for the new pulping method are constructed using data on enzyme treatments, which reflect the effect of enzymes and enable the realization of real-time control of the pulping process. The experimental results show that the efficiency of the pulping and papermaking process can be improved using biological enzymes, and the separation of cellulose can be facilitated using mixed enzymes, which have a better effect than single enzymes.

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Effect of xylanases on refining process and kraft pulp properties

Cited by 18 publications

References 19 publications

Biorefining: the role of endoglucanases in refining of cellulose fibers

Biorefining: the role of endoglucanases in refining of cellulose fibers

Pengaruh Alkali Aktif terhadap Karakteristik Pulp Kraft Putih Acacia mangium dan Eucalyptus pellita

Construction and Characterization of Fitting Equations for a New Wheat Straw Pulping Method

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