aeration

1. (countable, uncountable)The process by which air is circulated through or mixed with a substance such as soil or a liquid.

   the process of exposing to air (so as to purify)

2. (countable, uncountable)By extension, a process in which other gases (such as carbon dioxide or nitrogen or argon) are circulated through or mixed with a substance (usually liquid), sometimes with the consequence of increasing the transfer of air into the same liquid at the surface due to the induced circulation.

   Belüftung

regular