Developer, Autore a Air Dep

EQUIPMENT TYPE
For biogas desulphurization with a counter current
scrubber and a soda recovery vessel.

APPLICATION
High efficiency hydrogen sulphide (H2S) removal from
biogas or from the air or from other gases.

OPERATING PRINCIPLE
In biogas production plants one of the main problems is due
to the high concentration of H2S in the biogas. The
technologies used are essentially: addition of iron oxides
powder in the digester (with a high operating costs);
biological scrubbers (with a very high investment cost);
Chemical scrubbers (with very high operating costs and
more frequent maintenance) and static filters using
activated carbon or iron oxides (with very high operating
costs).
airdep has designed New Innovative technology with very
low investment cost and a low operating cost.
The plant is composed of a tower and a separate vessel, the
biogas flows up from the bottom of the column and is
washed with liquid which is fed from the top of the tower.
After the liquid has passed through the contact bed in the
scrubber, it reaches the oxidation vessel through a
connecting pipe, in this tank the liquid undergoes an
oxidation through air blown from the bottom by a blower.
From the oxidation tank the liquid is pumped back to the
scrubber through a recirculation pump that draws from the
bottom of the tank and sends it to the top of the scrubber
bed.

THE MAIN ADVANTAGES
The DBC is designed for the desulfurization of biogas with
H2S concentration from 2 to 20,000 ppm.
– Low investment cost
– Low operating cost
– Non Hazardous Liquid Waste