Microfiltration

Microfiltration media - 10 down to 0.2 micron holes

Microfiltration is a filtration process which removes contaminants from a fluid (liquid & gas) by passage through a microporous membrane layer. A typical microfiltration filtermedia pore size range is 0.1 to 10 microns. Microfiltration can use a pressurized system but it does not need to include pressure as in reverse osmoses or nanofiltration.

The principle of micro filtration is physical separation. The extent to which dissolved solids, turbidity and microrganisms are removed is determined by the size of the pores in the membranes. Substances that are larger than the pores in the membranes are fully removed. Substances that are smaller than the pores of the membranes are partially removed, depending on the construction of a refuse layer on the membrane. A cross-flow process can help to minimize the fouling of the surface of the microfiltration filter.

Stork Veco has two microfiltration filter principles. VecoMicro and VecoMicro-S. VecoMicro goes from 2 up to 10 micron holes; VecoMicro-S can go down to 0.2 microns.

Examples of microfiltration applications are:

· Cold sterilisation of beverages and pharmaceuticals

· Clearing of fruit juice, wines and beer

· Separation of bacteria from water

· Separation of oil/ water emulsions

· Pre-filtratio of water for nano filtration or Reverse Osmosis

· Solid-liquid separation for pharmacies or food industries

Filtration materials manufactured by Stork Veco: