Abstract
A model for the unstirred ultrafiltration of flocculating colloids is presented. The model allows for the growth of colloidal flocs above the membrane and the tendency to flocculate is related back to the zeta potential of individual particles. By calculating the deposited floc size from flocculation kinetics and particle proximity from double layer theory, it is possible to use the Carman-Kozeny equation to determine the specific resistance of successively deposited layers. This in turn allows the progress of the ultrafiltration to be predicted. Calculated flux declines and final fluxes from the model agree well with those measured experimentally for spherical silica colloid, r = 12.5 mm, in the range 0 ≦ zeta potential ≦ 35 mV.
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© 1986 Springer Science+Business Media New York
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McDonogh, R.M., Fell, C.J.D., Fane, A.G. (1986). Predicting Flux-time Behavior of Flocculating Colloids in Unstirred Ultrafiltration. In: Drioli, E., Nakagaki, M. (eds) Membranes and Membrane Processes. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-2019-5_20
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DOI: https://doi.org/10.1007/978-1-4899-2019-5_20
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