Synthetic colloidal particles with hard cores and soft, water-swollen shells were used to study cake formation during ultrafiltration. The total cake resistance was lowest for particles with thick shells, which indicates that interparticular forces between particles (steric hindrance and electrostatic repulsion) influenced cake formation. At low pressure the specific cake resistance could be predicted from the Kozeny-Carman equation. At higher pressures, the resistance increased due to cake compression. Both cake formation and compression were reversible. For particles with thick shells the permeate flux could be enhanced by lowering the pressure. Hence, the amount of water-swollen material influences both cake thickness and resistance.
|Title of host publication||WFC10 Proceedings : M-sessions|
|Publisher||Society for Chemical and Process Engineering|
|Publication status||Published - 2008|
|Event||World Filtration Congress - Leipzig, Germany|
Duration: 14 Apr 2008 → 18 Apr 2008
Conference number: 10
|Conference||World Filtration Congress|
|Period||14/04/2008 → 18/04/2008|
- Core-shell particles
Christensen, M. L., Nielsen, T. B., Andersen, M. B. O., & Keiding, K. (2008). Core-shell particles as model compound for studying fouling. In WFC10 Proceedings: M-sessions (pp. 261-264). Society for Chemical and Process Engineering.