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Comparison of enzymatic and refining treatment of pulp fibres for strength improvement
KTH, School of Chemical Science and Engineering (CHE).
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Jämförelse av enzymatisk behandling och raffinering av massafibrer för styrkeförbättringar (Swedish)
Abstract [en]

Today, in pulp and paper industry, refining is used for strength improvement. This process requires energy and therefore, alternative methods with less energy consumption are of interest for the industry. In tissue production, only small energy consumption is used for refining and an enzymatic treatment could possibly replace the refining process. Therefore, a quantitative comparison between refining and enzymatic treated pulp as a function of grammage was done in this study. To find out if it was possible to replace refining by enzymes, a bleached kraft softwood pulp from pine and spruce was used. The pulp was subjected to enzymatic treatments of two different monocomponent endoglucanases and by mechanical treatment by a Voith laboratory refiner for comparison. To investigate different properties of the samples, tensile test, stretch at break and Schopper-Riegler was performed. The experiments in this study demonstrated that the enzymatic treatment did not give any effect on strength or dewatering. Therefore, enzymes cannot replace refining by the method used in this study.

Place, publisher, year, edition, pages
2016.
Keyword [en]
Enzymatic treatment, refining, chemical pulp, softwood pulp, bleached pulp, tissue, strength properties
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-206736OAI: oai:DiVA.org:kth-206736DiVA: diva2:1093650
Available from: 2017-05-08 Created: 2017-05-08 Last updated: 2017-05-08Bibliographically approved

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