Australian Water Management Review Vol. 1 2014 | Page 17

Ventilation and Odour Control
A fan assisted odour control system is installed to
extract and treat any odours generated in the tank.
The process objectives of the odour control system are
to treat the air from the off-take chamber, inlet pipe,
pump station and storage tank, discharging clean air
to atmosphere with an odour concentration no greater
than 500 Odour Units and the odour level should not
exceed 2 Odour Units at the nearest receiver.
The system was purpose designed for this project
and not a package unit. The contaminated air
passes through a bed of activated carbon where the
contaminants are absorbed onto the carbon matrix
thus removing them from the air stream allowing for
the cleaned air to be discharge to atmosphere.

the unit’s performance with regards to the removal
of odour. The heater will ensure that the relative
humidity of the air stream will be no greater than
80%. The air will flow through the activated carbon
filter where the contaminants will be absorbed onto
the carbon, removing them from the gas phase.
From the filter, the cleaned air will be drawn through
two extraction fans. These fans will operate in a
duty/standby regime with auto changeover on fan
failure, low airflow and operator adjustable rot F