Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
638536 | Journal of Membrane Science | 2007 | 10 Pages |
Abstract
To reduce the problems with fouling and concentration polarization during crossflow ultrafiltration of industrial enzyme solutions an electric field is applied across the membrane. The filtration performance during electro-ultrafiltration (EUF) has been tested with several enzymes. Results show that EUF is an effective method to filter high concentrated solutions at low crossflow. The flux improved 3-7 times for enzymes with a significant surface charge at an electric field strength of 1600âV/m compared to conventional UF. The greatest improvement is observed at high concentration. Not all enzymes can be filtered with EUF, mainly due to a low surface charge and impurities in the feed solution. Using a pulsed electric field did not improve the flux compared to a constant field. Gel electrophoresis experiments of the enzymes appear to be a useful method for estimating the influence of the electric field.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
A.D. Enevoldsen, E.B. Hansen, G. Jonsson,