(F) (SELF-PURIFICATION FACTOR) The self-purification factor is an indication of the ability of a stream to assimilate a waste discharge. It is defined as the ratio of the re-aeration (r) and the rate of deoxygenation (k), or F = r/k, where F is called the self-purification factor.
F
Meaning of F in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012