Retention efficiency, filter media

All filters require a filter medium to retain solids, whether the filter is for cake filtration or for filter-medium or depth filtration. Specification of a medium is based on retention of some minimum parficle size at good removal efficiency and on acceptable hfe of the medium in the environment of the filter. The selection of the type of filter medium is often the most important decision in success of the operation. For cake filtration, medium selection involves an optimization of the following factors ... 

The primary objective of a sterilizing filter is to remove microorganisms. The filter medium used to accomplish such an efficient retention may be classified as one of two types—the reusable type or the disposable type. 

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