aeration

aer·a·tion

aeration

n.
  1. Exposure to the free action of the air; airing; as, aëration of soil, of spawn, etc.
  2. A change produced in the blood by exposure to the air in respiration; oxygenation of the blood in respiration; arterialization. (Physiol.)
  3. The act or preparation of charging a liquid with carbon dioxide gas to make it effervescent.
  4. the act of charging a liquid with air or oxygen for the purpose of purification.