Similar term(s): MF.
Water under high pressure is forced through a membrane, a thin material with
very small pores, stopping small particles (including bacteria).
There are four categories of membrane filtration: reverse osmosis (RO),
nanofiltration (NF), ultrafiltration (UF), and microfiltration (MF). As opposed
to granular activated carbon, membrane filtration is a non-absorbent water
Granular activated carbon - Natural organic matter - Ozone biofiltration