Home About Browse Search
Svenska


CRUW Mechanical Pulping: Sub-project 10, enzyme treatment of chips for energy reduction in TMP

Salmén, Lennart and Ander, Paul and Fernando, Dinesh and Daniel, Geoffrey and Viforr, Silvia and Mårtensson, Tomas and Hildén, Lars and Hilden, Lars and Moberg, Anders and Paulson, Magnus and Nelsson, Erik and Bäck, Roland and Sandström, Peter (2013). CRUW Mechanical Pulping: Sub-project 10, enzyme treatment of chips for energy reduction in TMP. Uppsala: (S) > Dept. of Forest Products, Sveriges lantbruksuniversitet. Intern rapport / Centrum för forskning om vedfiberns ultrastruktur ; 10
[Report]

[img]
Preview
PDF
3MB

Abstract

In order to evaluate the possibilities of using enzymes for pre-treating softwood chips as a means of lowering the energy demand in mechanical pulping, impregnation and refining trials were performed using a set of different enzymes. The enzymes tested pectinase, xylanase and mannanase gave increased sugar release in the impregnation trials indicating that most of the sugar released occurred in the first 60 minutes and that activities thereafter seemed to level off. Refining trials using a small Wing refiner showed that for chips treated for 60 minutes with pectinase, xylanase and mannanase no energy savings to a given freeness level was observed. The property development was similar to that of reference pulps in the case of pectinase and xylanase while for chips treated with mannanase a less favourable development of the tensile index was noted. For chips treated for two hours, using xylanase or pectinase, energy savings could be observed for pectinase treated chips down to a freeness level of 200 CSF. However when refined further, the properties approached those of the reference pulp. Considering the much higher enzymatic activity reached when the initial fibre material was further disintegrated it is assumed that the possibilities for enzymes to attack desired structures of the intact fibre wall may have been too few even in the case of Impressafiner treated material.

Authors/Creators:Salmén, Lennart and Ander, Paul and Fernando, Dinesh and Daniel, Geoffrey and Viforr, Silvia and Mårtensson, Tomas and Hildén, Lars and Hilden, Lars and Moberg, Anders and Paulson, Magnus and Nelsson, Erik and Bäck, Roland and Sandström, Peter
Title:CRUW Mechanical Pulping: Sub-project 10, enzyme treatment of chips for energy reduction in TMP
Series/Journal:Intern rapport / Centrum för forskning om vedfiberns ultrastruktur (BIB19552896)
Year of publishing :2013
Depositing date:30 August 2016
Number:10
Number of Pages:32
Place of Publication:Uppsala
Publisher:Department of Forest Products, Swedish University of Agricultural Sciences.
Language:English
Publication Type:Report
Article category:Other scientific
Full Text Status:Public
Agris subject categories.:K Forestry > K50 Processing of forest products
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 209 Industrial Biotechnology > Bioprocess Technology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Wood Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Agrovoc terms:mechanical pulp, energy saving, enzymes, solid fuel
Keywords:thermomechanical pulping, enzyme treatment, chips, energy reduction
URN:NBN:urn:nbn:se:slu:epsilon-e-3632
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3632
ID Code:13513
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Products
Deposited By: SLUpub Connector
Deposited On:30 Aug 2016 14:16
Metadata Last Modified:31 Aug 2016 06:33

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits