The separation of batch dispersions is affected by the initial turbulence present in the settler which reduces the initial sedimentation rate and the onset of interfacial coalescence. As the turbulence decays, these rates gradually increase, giving rise to sigmoidal sedimentation and coalescence profiles. A model is presented which describes the separation of a dispersion of height H-0 and holdup epsilon(0) with an initial drop diameter phi(0), and interfacial coalescence time tau(d) allowing for the turbulence decay time t(d) and coalescence incubation time t(0). For a given holdup epsilon(0), the drop diameter phi(0) and initial turbulence are themselves functions of the mixing conditions. The model is used to describe experimental data for both water-in-oil and oil-in-water dispersions for different liquid-liquid systems ranging from a heavy crude to a water-like model oil. The effect of physical properties, holdup, initial turbulence, and settler geometry is investigated.