Pulsed electrophoretic membrane cleaning for dead-end ultrafiltration process
Membrane separation technology has been identified as a new and clean technology and as an alternative to the conventional separation technology since it can offer some advantages over those separation technologies. Nevertheless, membrane fouling appears to be the major bottleneck of this technol...
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| Main Authors: | , |
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| Format: | Article |
| Published: |
2002
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| Online Access: | http://journalarticle.ukm.my/1391/ http://www.ukm.my/jkukm/index.php/jkukm |
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| Summary: | Membrane separation technology has been identified as a new and clean technology
and as an alternative to the conventional separation technology since it can offer some
advantages over those separation technologies. Nevertheless, membrane fouling
appears to be the major bottleneck of this technology. Many approaches have been
proposed to reduce membrane fouling. The approach considered in this paper is the
application of electric pulse to remove deposits from the membrane surface. An
experimental test rig is constructed to study the effect of electric pulse on the
membrane cleaning effectiveness. The filter cake is collected after every application
of each electric pulse to ensure that the deposited materials which has been removed
from the membrane surface after each electric pulse will not be redeposited onto the
membrane surface. The dead-end ultrafiltration of silica dioxide (Si02) dispersion is
conducted with various values of pulse interval, pulse duration and feed
concentration. It is found that the application of the electric pulse to reduce membrane
fouling and restore high permeation rate is effective in the dead-end filtration process.
The application of electric pulses across the membrane gives a higher permeation rate
than the conventional ultrafiltration process |
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