Flocculant and Surfactant Aided Dewatering of Fine Particle Suspensions: A Review

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Abstract
Dewatering in general is reviewed for fine particles. The review encompasses dewatering fundamentals, capillary theory of dewatering, residual saturation, dewatering kinetics, factors influencing fine particle dewatering and the use of flocculants and surfactants as dewatering aids. The mechanism of flocculant and surfactant aided dewatering along with the factors influencing them are highlighted. The advantages of synergistic effect of flocculants and surfactants on dewatering have been illustrated and scope for further work in this direction is emphasised.