Membrane Filtration Plants

Basic Filtration

The filtration process is used to separate dissolved and dispersed components of different molecular sizes from a liquid. 

Cross Flow filtration

Cross flow filtration applies tangential flow over the membrane, where the actual system pressure forces filtrate (permeate) through the membrane. The cross-flow/tangential flow greatly reduces the build-up of material/solids on the membrane surface (“self-cleaning” effect) allowing relatively long operating time between cleanings, when designed correctly.

 

“Dead-End” filtration

Conventional filtration or “Dead-End” filtration, e.g. bag filters, use designs where flow and pressure are directed “perpendicularly” on the filter/membrane. Material/solids will relatively fast build up on the filter/membrane surface, and gradually reduce the flow and eventually block the surface. The filter either needs emptying or replacement (depending on design) before the filtration can continue.

Microfiltration

Ultrafiltration

Nanofiltration

Reverse Osmosis