-Microfiltration process dead-end filtration and cross-flow filtration mode.
Dead end filtration
Under the pressure, liquid flow direction and perpendicular to the surface of the filter is called a dead-end filtration membrane. Total amount of dead-end filtration is also called filtering, DC filter.
When the dead-end filtration, solvent and solute particles smaller than the holes inthe pressure pushed through the membrane, solute particles larger than the holestrapped, usually deposited on the membrane surface,. As time increases, more and more particles accumulate on the membrane surface, film permeability will drop,then had to stop to clean the membrane surface or replacement.
Under the pressure, liquid flow direction parallel to the surface of the filter as cross-flow filtration.
Liquid flows along the surface, have a shear force on membrane surface of interception, return the part in the main stream, thereby reducing membrane fouling. Membrane through speed can be maintained in a relatively long period of time at a high level.