The flocculation activity achieved with aqueous solutions of polyacrylamide and
acrylamide/acrylate copolymers is shown to be highly dependent upon the solution age.
Continuous flocculation with a standard kaolin slurry in a Couette mixing device, giving
settling rate and in-line chord length distributions, allows the comparison of different
flocculant properties and make-up conditions. The multiple-stage ageing process proposed
by Owen et al.[Owen, AT, Fawell, PD, Swift, JD and Farrow, JB (2002), The impact of …