MEMBRANE FILTRATION
The principle of membrane system is physical separation. The extent to which dissolved solids turbidity and microrganisms are removed is determined by the size of the pores in the membranes.
Substances that are larger than the pores in the membranes are fully removed. Substances that are smaller than the pores of the membranes are partially removed, depending on the construction of a refuse layer on the membrane. Micro filtration and ultra filtration are pressure-dependent processes, which remove dissolved solids and other substances from water to a lesser extend than Reverse Osmosis.