Filtering

Filtering is the mechanical separation of a suspension into its liquid and solid particles with the help of a liquid-permeable filter medium.

The filter medium allows the generally solid-free liquid - the filtrate - to pass through and holds back the solid particles as a filter cake. Both filtrate and filter cake can be recovered as a product.

Frequently, such filtration processes are combined with washing or extraction processes and so are utilised as multi-level processes.