Filter Sterilization

Suspended solids may be separated from a fluid during filtration by the following mechanisms:

(i) Inertial impaction.

(ii) Diffusion.

(iii) Electrostatic attraction.

(iv) Interception.

(i) Inertial impaction

Suspended particles in a fluid stream have momentum. The fluid in which the particles are suspended will flow through the filter by the route of least resistance. However, the particles, because of their momentum, tend to travel in straight lines and may therefore become impacted upon the fibres where they may then remain. Inertial impaction is more significant in the filtration of gases than in the filtration of liquids.

Air vent

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