Improvement of ultrafiltration performance by oxidation treatment in the recovery of galactoglucomannan from wood autohydrolyzate

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: M. Mänttäri, M. Al Manasrah, E. Strand, H. Laasonen, S. Preis, L. Puro, C. Xu, V. Kisonen, R. Korpinen, M. Kallioinen
Publication year: 2015
Journal: Separation and Purification Technology
Journal acronym: SEP PURIF TECHNOL
Volume number: 149
Start page: 428
End page: 436
Number of pages: 9
ISSN: 1383-5866
eISSN: 1873-3794


The possibility to enhance ultrafiltration in the recovery of galactoglukomannan (GGM) from wood auto-hydrolysate with the gas-phase pulsed corona discharge (PCD) oxidation was studied. The filtration capacity, membrane fouling, and purity of hemicelluloses in the membrane concentrates were used as criteria to evaluate the benefits of the hybrid separation process. The results showed that the PCD oxidation significantly improved the filterability of the wood autohydrolyzate, although its effect on the fouling of the very hydrophilic cellulose-based UF membranes was low. The positive influence on filterability can be at least partly explained by the decreased viscosity of the oxidized autohydrolyzates. Oxidation modified the structure of the lignin but its effect on the lignin molar mass was small. As a result of oxidation, the average molar mass of hemicelluloses was also slightly decreased. Therefore, the influence of oxidation on the purity of the concentrated hemicellulose fractions was not as high as expected. However, oxidation removed lignans and lipophilic wood extractives, which have some influence on the purity of the produced hemicellulose fractions.


Ethanol Oxidation, Hemicellulose, Ultrafiltration, Wood autohydrolyzate

Last updated on 2020-05-04 at 03:34