Microfiltration and Ultrafiltration | Porex Filtration

Microfiltration (MF) is a low pressure (0.7 – 7 bar, 10-100 psig) separation process for separation of 0.1 μm and larger size solutes from aqueous solutions by means of a semi-permeable membrane. Ultrafiltration (UF) is also a low pressure separation process for separation of solutes in the size range from 0.01 μm to 0.1 μm.

In Tubular Microfiltration and Tubular Ultrafiltration, this process is carried out by having a process solution flow along a membrane surface under pressure. Retained solutes (such as particulate matter) leave with the flowing process stream and do not accumulate on the membrane surface. This is also called Cross-flow filtration.

In Cross-flow filtration, the fluid flow is tangential to the filtration surface. This design provides turbulence at the membrane surface which prevents build-up of particulates and continuously flushes away the concentrated solids.

In Porex Tubular Membrane Filter (TMF) modules, the membrane is made in a tubular design, where the membrane is deposited in the wall of a PVDF or PE substrate tube. Tubular Membranes are bundled together in modules and the modules are linked together to create a filtration system.