A3.10.3 Chemical Technology



Chemical Scrubbers are often used for odour control. The principle is that the odour is absorbed by a chemical agent and therefore not released to the atmosphere.


Flocculation is a process used in water treatment, where particles are removed from suspension in the form of flakes. Particles finer than 0.1 µm in water remain continuously in motion due to electrostatic charge (often negative) which causes them to repel each other. Once their electrostatic charge is neutralized by the use of coagulant chemical, the finer particles start to collide and combine together.

Flocculants are chemicals that promote flocculation by causing suspended particles in liquids to aggregate.