The noun FILTRATION has 2 senses: 1. the process whereby fluids pass through a filter or a filtering medium. 2. the act of changing a fluid by passing it through a filter. Familiarity information: FILTRATION used as a noun is rare.
A sentence averages eleven words; an A4 / letter size sheet averages 32 to 35 sentences. A normal size sheet of paper with a standard layout, based on 80% - 90% coverage contains about 350 to 400 words.
In the absolute, most strict guidelines of MLA formatting, you can expect about 270 words per page. I think based on much of the above response, expecting 250-300 words per page is fairly safe, but certainly test it out using the style guidelines of whomever you're submitting to.