ABSTRACT
In all cases there is a strong influence of particle size, and it is often found that increasing particle size by a coagulation/flocculation procedure is a necessary preliminary step before one or more of the previously mentioned processes is used. Filtration can be an effective method, but, for various reasons, it may be preceded by another separation process, either sedimentation or flotation. This can greatly reduce the load on the subsequent filtration process and leads to longer filter runs. A typical sequence of steps in a solid-liquid separation procedure is shown schematically in Figure 7.1.
