Abstract
The aim of the study was to investigate the effects of individual non-lignolytic enzymes on mechanical pulping. Main emphasis was to decrease the energy consumption of refining and to improve the handsheet properties by the enzymatic treatments. Cellulases and hemicellulases were produced and purified in pilot scale. Samples of spruce TMP pulps (CSF 350 - 800 ml) were obtained from a pilot refiner (KCL) and from a pulp mill (Tampella Forest Oy). For screening of enzymes hydrolysis experiments with different enzyme dosages, incubation times and pulp compositions (fractioned - non-fractioned) were carried out. Very low level of hydrolysis by individual purified enzymes were detected. As expected the carbohydrates solubilized increased as a function of enzyme dosage and incubation time. Laboratory experiments were performed in order to study the effects of enzymatic treatments on energy consumption of refining. Best results were obtained by a purified cellulase; in the subsequent refining 10 - 20 % less energy, as compared to the untreated controls, was needed to achieve a low freeness level. Handsheet properties of the enzymatically treated pulps were at least equal to or even slightly better as compared to the controls. The result show that individual enzymes, especially cellulases free of
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Pere, J;
Siika-aho, M;
Viikari, L
[1]
- Technical Research Centre of Finland, Espoo (Finland). Biotechnical Lab.
Citation Formats
Pere, J, Siika-aho, M, and Viikari, L.
Enzymes in refiner mechanical pulping. Final report; Entsyymit mekaanisen massan valmistuksessa; Loppuraportti.
Finland: N. p.,
1993.
Web.
Pere, J, Siika-aho, M, & Viikari, L.
Enzymes in refiner mechanical pulping. Final report; Entsyymit mekaanisen massan valmistuksessa; Loppuraportti.
Finland.
Pere, J, Siika-aho, M, and Viikari, L.
1993.
"Enzymes in refiner mechanical pulping. Final report; Entsyymit mekaanisen massan valmistuksessa; Loppuraportti."
Finland.
@misc{etde_10135844,
title = {Enzymes in refiner mechanical pulping. Final report; Entsyymit mekaanisen massan valmistuksessa; Loppuraportti}
author = {Pere, J, Siika-aho, M, and Viikari, L}
abstractNote = {The aim of the study was to investigate the effects of individual non-lignolytic enzymes on mechanical pulping. Main emphasis was to decrease the energy consumption of refining and to improve the handsheet properties by the enzymatic treatments. Cellulases and hemicellulases were produced and purified in pilot scale. Samples of spruce TMP pulps (CSF 350 - 800 ml) were obtained from a pilot refiner (KCL) and from a pulp mill (Tampella Forest Oy). For screening of enzymes hydrolysis experiments with different enzyme dosages, incubation times and pulp compositions (fractioned - non-fractioned) were carried out. Very low level of hydrolysis by individual purified enzymes were detected. As expected the carbohydrates solubilized increased as a function of enzyme dosage and incubation time. Laboratory experiments were performed in order to study the effects of enzymatic treatments on energy consumption of refining. Best results were obtained by a purified cellulase; in the subsequent refining 10 - 20 % less energy, as compared to the untreated controls, was needed to achieve a low freeness level. Handsheet properties of the enzymatically treated pulps were at least equal to or even slightly better as compared to the controls. The result show that individual enzymes, especially cellulases free of synergistic action can be efficiently used to the modification of carbohydrate structures of coarse mechanical pulp. This modification leads to energy savings and improvement of fibre properties such as flexibility}
place = {Finland}
year = {1993}
month = {Dec}
}
title = {Enzymes in refiner mechanical pulping. Final report; Entsyymit mekaanisen massan valmistuksessa; Loppuraportti}
author = {Pere, J, Siika-aho, M, and Viikari, L}
abstractNote = {The aim of the study was to investigate the effects of individual non-lignolytic enzymes on mechanical pulping. Main emphasis was to decrease the energy consumption of refining and to improve the handsheet properties by the enzymatic treatments. Cellulases and hemicellulases were produced and purified in pilot scale. Samples of spruce TMP pulps (CSF 350 - 800 ml) were obtained from a pilot refiner (KCL) and from a pulp mill (Tampella Forest Oy). For screening of enzymes hydrolysis experiments with different enzyme dosages, incubation times and pulp compositions (fractioned - non-fractioned) were carried out. Very low level of hydrolysis by individual purified enzymes were detected. As expected the carbohydrates solubilized increased as a function of enzyme dosage and incubation time. Laboratory experiments were performed in order to study the effects of enzymatic treatments on energy consumption of refining. Best results were obtained by a purified cellulase; in the subsequent refining 10 - 20 % less energy, as compared to the untreated controls, was needed to achieve a low freeness level. Handsheet properties of the enzymatically treated pulps were at least equal to or even slightly better as compared to the controls. The result show that individual enzymes, especially cellulases free of synergistic action can be efficiently used to the modification of carbohydrate structures of coarse mechanical pulp. This modification leads to energy savings and improvement of fibre properties such as flexibility}
place = {Finland}
year = {1993}
month = {Dec}
}