The effects of fungi pre-treatment of poplar chips on the kraft fiber properties

Garmaroody, Esmaeil Rasooly; Fardim, Pedro; Hosseini, S. Z.; Rahnama, K; Saraeeyan, Ahmad Reza; Mirshokraee, S A

doi:10.1016/j.biortech.2010.12.054

Cited by 11 publications

(4 citation statements)

References 18 publications

(22 reference statements)

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“…These results revealed that pretreatment with pectinase before pulping could yield further improvements in the paper quality. The results were similar to findings form other researchers (Pulkkinen et al 2006;Garmaroody et al 2011). The pectinase pretreatment may facilitate an increase in fiber average length and variations in the level of fiber bonding (Bajpai 1999).…”

Section: Effects Of Pectinase Pretreatment On Soda-aq Pulps Propertiessupporting

confidence: 91%

Effects of pectinase treatment on pulping properties and the morphology and structure of bagasse fiber

Liu

Jiang

Yang

et al. 2017

BioRes

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Bagasse was pretreated by pectinase, and both the control and pretreated bagasse were subjected to soda-anthraquinone (AQ) pulping. There were significant improvements in pulp properties after pectinase treatment, such as relative increases of brightness (5.5%), breaking length (17.1%), burst factor (16.5%), and tear factor (7.0%). The samples were analyzed by a fiber analyzer, scanning electron microscope (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The pectinase treatment changed the material properties, which would improve the efficiency of subsequent pulping, such as increasing the fiber length (20.0%), lowering the fines length (10.6%), and increasing the percentage of flexible fiber. Pectinase treatment removed some non-cellulose components; in particular, the pectin and alcohol-benzene extractives were decreased by 19.4% and 37.3% after enzymatic treatment. The hemicellulose and lignin were decreased by 5.5% and 1.9%, respectively. A bulkier and more collapsed fiber surface was observed in the treated fibers, which suggested greater pore volume and more accessible surface area. Treatment caused a slight incline by 4.8% in the crystallinity index. Some chemical structures in pectin, hemicellulose, and lignin were partly broken, showing the effect of pectinase treatment on the degradation of non-cellulose components. Pectinase treatment prior to pulping is therefore recommended, given its efficiency and eco-friendly nature.

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Section: Effects Of Pectinase Pretreatment On Soda-aq Pulps Propertiessupporting

confidence: 91%

Effects of pectinase treatment on pulping properties and the morphology and structure of bagasse fiber

Liu

Jiang

Yang

et al. 2017

BioRes

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“…Although the enzyme was more functional at values greater than 60 min, exhibited by a 22.57% decrease in Kappa number and a 36.51% increase in residual alkali at 100 min, the extension of treatment time did not clearly improve the brightness, pulp yield, or the physical properties of the handsheets. These results are similar to the findings of Garmaroody and Pulkkinen (Pulkkinen et al 2006;Garmaroody et al 2011). In consequence, the optimal time for pectinase pretreatment was determined to be 60 min.…”

Section: Optimization Of Enzymatic Treatment Processsupporting

confidence: 88%

Effect of Alkali Pectinase Pretreatment on Bagasse Soda-Anthraquinone Pulp

Liu¹,

Jiang²,

Xie³

et al. 2017

BioResources

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Pectinase pretreatment prior to bagasse soda-anthraquinone (AQ) pulping was conducted, and the effects of pectinase pretreatment on the pulp strength properties, energy consumption, and pulpability were evaluated in this study. Considering the pulp properties, the optimal conditions for the pectinase pretreatment were a pectinase dosage of 60 U/g (with respect to oven-dry bagasse) and 60-min treatment time. Compared with the control pulps obtained under the same treatment conditions with enzyme pretreatment (just without enzyme addition), the pretreated pulps attained a reduction in kappa number of 17.8% and an increase in total pulp yield of 15.8%. Moreover, higher breaking length, burst factor, and tear factor after soda-AQ pulping were found in the pectinase-pretreated samples, which suggests some improvements in pulp strength properties. With pectinase treatment, a 1% reduction in alkali charge and 20% decrease in pulping time were observed in subsequent pulping stages without affecting the pulp properties. Pectinase treatment prior to pulping seems to be a promising, economically feasible, and eco-friendly concept.

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“…In recent years, it has been demonstrated that the pretreatment of wood and agricultural wastes with lignin-degrading fungi could be beneficial not only to the process of mechanical pulping (Akhtar et al 1998;Scott et al 2002;Singh and Chen 2008) but also in chemical pulping (Messner and Srebotnik 1994;Akhtar et al 1998;Isroi et al 2011). Reports on biochemical pulping indicate a reduction in kappa number at a given pulp yield (Oriaran et al 1990;Blanchette et al 1992;Mosai et al 1999;Yaghoubi et al 2008) as well as improvements in certain physicochemical properties of paper handsheets, such as brightness and strength properties (Akhtar et al 1998;Shukla et al 2004;Singh et al 2010;Isroi et al 2011;Garmaroody et al 2011) and a reduction of pollutants in the waste water from these industries (Yadav et al 2010).…”

Section: Discussionmentioning

confidence: 99%

“…Among them, composting and use as a raw material for the production of ethanol as an alternative combustible form seem to be the most economically feasible. Moreover, the general use of alternative, environmentally friendly technologies that introduce lignocellulose enzymes at different stages of pulp and paper manufacture as a pretreatment to pulping (biopulping) and bleaching (biobleaching) have allowed considerable electrical power savings, improvements in paper strength, and a reduction of pollutants in the waste water from these industries (Akhtar et al 1998;Shukla et al 2004;Singh et al 2010;Isroi et al 2011;Garmaroody et al 2011). In addition, pretreatment of agricultural wastes with ligninolytic fungi enables the use of the wastes as raw material for paper manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Selection of Fungal Isolates for Biopulping of Rice Straw

El-Din¹,

Kheiralla²,

Malek³

et al. 2013

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Sixty-two fungal isolates were screened for lignin peroxidase production. The most potent isolates for lignin peroxidase production were identified using the DNA sequence of the internal transcribed spacer (ITS) region as Phanerochaete chrysosporium and Pleurotus ostreatus. The pretreatment of rice straw with P. chrysosporium, Pl. ostreatus, or lignin peroxidase for use in the biopulping process was studied. Great variations in the loss of pulp yield and kappa number were recorded with different fungal and enzyme treatments. Pretreatment of rice straw with P. chrysosporium for 25 days resulted in a substantial decrease in pulp yield (by 9.1%) and kappa number (by 25.6%). Losses of pulp yield and kappa number were considerably lower with lignin peroxidase treatment (3.7 and 14.1%, respectively). However, the pretreatment of rice straw with the Pl. ostreatus isolate caused moderate pulp yield losses (5.8%) and preferential lignin degradation (kappa number losses of 34.6%). This indicated that the Pl. ostreatus isolate might be superior to both the isolate of P. chrysosporium and lignin peroxidase for use in the biopulping process or other processes in which preferential lignin degradation is desired.

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The effects of fungi pre-treatment of poplar chips on the kraft fiber properties

Cited by 11 publications

References 18 publications

Effects of pectinase treatment on pulping properties and the morphology and structure of bagasse fiber

Effects of pectinase treatment on pulping properties and the morphology and structure of bagasse fiber

Effect of Alkali Pectinase Pretreatment on Bagasse Soda-Anthraquinone Pulp

Selection of Fungal Isolates for Biopulping of Rice Straw

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