Odour control, activated carbon

DORLING, T.A. (1978). Activated Carbon in Odour Control, Warren Spring Laboratory Report, LR 293 (AP). 

If odour control is also required, then this may be achieved by adding a separate activated carbon filter, or by adding a layer of this material (or of nonwoven fibres in which carbon particles are embedded) to the standard three-layer particulate filtration medium. 

---