Effect of flocculation on critical flux during crossflow microfiltration of bentonite suspensions
journal contributionposted on 02.06.2009, 08:58 by Kuhan Chellappah, Steve Tarleton, Richard J. Wakeman
The effectiveness of polymeric flocculant addition and hydrodynamics on increasing the critical permeation flux, Jcrit, during crossflow microfiltration of bentonite suspensions using a tubular ceramic membrane module was investigated. The investigation determined the effects of flocculant concentration on Jcrit at various crossflow velocities. The best filtration performance (highest Jcrit) was obtained at a flocculant dose of 500 mg kg-1 (mg of flocculant per kg of solids) and at a crossflow velocity of 1.71 m s-1. Particle size has been used as a parameter to fit the shear-induced hydrodynamic diffusion model to the experimental filtration data.
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