The fogging systems have been very useful until the appearance of Dry Vapor technology.
It consists essentially in projecting a neutralizing solution (water + product) into the atmosphere in the form of fine drops (<50 µ) which allows them to remain in suspension and can trap the odorous molecules to neutralize them.
Pneumatic fogging systems use compressed air and special nozzles with liquid and air inlet. Inside the nozzle the air "breaks" the flow of liquid and microdroplets are emitted into the environment.
These systems are not as sensitive as hydraulic systems, but they also require some maintenance and have a high consumption of compressed air.