Absorption of vapours
With the absorption of vapours, contaminants are washed from the vapour flow, by cleaning in counterflow with water or an aliphatic washing liquid (e.g. diesel or oil). This process is also known as scrubbing. The washing may also be carried out using caustic soda, acid or some other additive, of course depending on the specific situation.
We sometimes use scrubbing as a ‘peak shaver’, whereby any high influent peaks are levelled off for the eventual air purification.