High-yield kraft pulping of Eucalyptus grandis Hill ex Maiden biotreated by Ceriporiopsis subvermispora under two different culture conditions
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Abstract
In the present study, it was evaluated how two different culture conditions for the biotreatment of Eucalyptus grandis by Ceriporiopsis subvermispora affect a subsequent high-yield kraft pulping process. Under the varied culture conditions investigated, different extracellular enzyme activities were observed. Manganese-peroxidase (MnP) secretion was 3.7 times higher in cultures supplemented with glucose plus corn-steep liquor (glucose/CSL) as compared to non-supplemented (NS) cultures. The biotreated samples underwent diverse levels of wood component degradation as losses of weight and lignin were increased in glucose/CSL cultures. Mass balances for lignin removal during kraft pulping showed that delignification was facilitated when both biotreated wood samples were cooked. Delignification efficiency did not correlate positively with MnP levels in the cultures. On the other hand, biopulps from NS and glucose/CSL cultures saved 27% and 38% beating time to achieve 28° Schopper-Riegler freeness during refining, respectively. Biopulps disposed of decreased tensile and tear resistances, thus easier refining of the biokraft pulps seems to be a consequence of less resistant fiber walls. Improved beatability of biopulps was tentatively related to short fibers and fines formation during refining. We suggest that to some extent polysaccharide depolymerization occurred during the biotreatment, which also resulted in diminished pulp yields in the case of glucose/CSL cultures.
©2009 by Walter de Gruyter Berlin New York
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- An improved drying model for highly-impermeable hardwoods
- Neutron attenuation coefficients for non-invasive quantification of wood properties
- Topochemical investigations of cell walls in developing xylem of beech (Fagus sylvatica L.)
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- Short Notes
- Apigenin derivatives from Paulownia tomentosa Steud. var. tomentosa stem barks
- Forming limits for the bulk forming of solid wood
- Meetings
- Meetings
Articles in the same Issue
- Original Papers
- 2D-NMR (HSQC) difference spectra between specifically 13C-enriched and unenriched protolignin of Ginkgo biloba obtained in the solution state of whole cell wall material
- Colour in thermally modified wood of beech, Norway spruce and Scots pine. Part 1: Colour evolution and colour changes
- Colour in thermally modified wood of beech, Norway spruce and Scots pine. Part 2: Property predictions from colour changes
- The relationship found between fibre length and viscosity of three different commercial kraft pulps
- High-yield kraft pulping of Eucalyptus grandis Hill ex Maiden biotreated by Ceriporiopsis subvermispora under two different culture conditions
- Analysis of microwave vs. thermally assisted grafting of poly(methyl-vinyl ether co-maleic acid)-polyethylene glycol to birch kraft pulp
- Selective enzyme impregnation of chips to reduce specific refining energy in alkaline peroxide mechanical pulping
- Radical chain reactions in pyrolytic cleavage of the ether linkages of lignin model dimers and a trimer
- Quantitative chemical indicators to assess the gradation of compression wood
- Comparison of mechanical properties of thermally modified wood at growth ring and cell wall level by means of instrumented indentation tests
- Revisiting the transition between juvenile and mature wood: a comparison of fibre length, microfibril angle and relative wood density in lodgepole pine
- Characterization of the wood quality of pernambuco (Caesalpinia echinata Lam) by measurements of density, extractives content, microfibril angle, stiffness, color, and NIR spectroscopy
- An improved drying model for highly-impermeable hardwoods
- Neutron attenuation coefficients for non-invasive quantification of wood properties
- Topochemical investigations of cell walls in developing xylem of beech (Fagus sylvatica L.)
- Effects of substrate on laboratory spalting of sugar maple
- Short Notes
- Apigenin derivatives from Paulownia tomentosa Steud. var. tomentosa stem barks
- Forming limits for the bulk forming of solid wood
- Meetings
- Meetings
