Wiktionary
microfiltration
n. filtration through a microporous membrane
Wikipedia
Microfiltration
Microfiltration (commonly abbreviated to MF) is a type of physical filtration process where a contaminated fluid is passed through a special pore-sized membrane to separate microorganisms and suspended particles from process liquid. It is commonly used in conjunction with various other separation processes such as ultrafiltration and reverse osmosis to provide a product stream which is free of undesired contaminants.
Usage examples of "microfiltration".
Johnny Gentle, managing somehow to look presidential in a Fukoama microfiltration mask, whose Inaugural Address heralded the advent of a Tighter, Tidier Nation.