Suitability of enzymes hydrolysing galactoglucomannan, glucan, xylan and pectin was tested for treating concentrate from ultrafiltration of circulation water obtained from a Finnish ground wood mill. The improvement of filterability after the enzymatic treatments was evaluated by secondary ultrafiltration. Filterability of the PGW-concentrate improved significantly by mannanase and cellulase treatments indicating that galactoglucomannan and glucan were the main carbohydrates impeding filtration. Since cellulase also loosened the structure of the membrane material used in the filtration experiments, cellulase containing enzyme products cannot be applied in an industrial filtration process when regenerated cellulose is used as membrane material.
|Number of pages
|Paperi ja puu
|Published - 2003
|MoE publication type
|B1 Article in a scientific magazine