Packed bed scrubber (wet srcubbing)
GGE

Odors are mostly spread because they are transported by supports with minimum dimensions (micro-dusts which are as small as thousandths/hundredths/tenths of micron) or by gasifying molecules.
Scrubbers are vertical towers where fumes or gases are washed.
The operation of these towers is based on the absorption principle; in fact, in these machineries the water-soluble polluting components, which are a means of transport for the odorant molecules, are transferred.
The most used absorbing liquid is water, which nevertheless limits the efficiency of the systems in presence of odor sources coming from poorly water-soluble compounds.
The most water-soluble molecules are: ammonia, alcohols, volatile fatty acids; the most hardly water-soluble ones are substances such as: amines, hydrogen sulphide, ketones, aldehydes.