Micro Filtration is a low pressure process for separating larger size solutes from aqueous solutions by means of a semi-permeable embrane. This process is carried out by having a process solution flow along a membrane surface under pressure.

Retained solutes (such as articulate matter) leave with the flowing process stream and do not accumulate on the membrane surface. - Retains large suspended solids - Passes some suspended solids and all dissolved material - Pore ranges from 0.1 micron to 3 micron Nano Filtration