Process

Pressure Difference

Work

Microfiltration (MF)

Pressure difference of about 100 KPa

Suspended particles, fibers

Ultrafiltration (UF)

0.1 - 1.0 MPa pressure difference

Colloidal macromolecules

Reverse osmosis (RO)

0.5 - 1 MPa pressure difference

Solute, salt

Nanofiltration (NF)