Air Dosing Unit Brochure

Sulphur in biogas causes problems during combustion in the CHP. Desulphurization is useful. Using an air dosing unit it is possible to feed small amounts of oxygen into the digester tank. Desulphurization of biogas takes place within the digester through the activity of naturally occurring bacteria that use the hydrogen sulphide in their metabolism and deposit elemental sulphur. They need a small amount of oxygen. To this end an air pump blows a small amount of air into the gas space in the digester. The amount of air should be about 4-6% of the amount of gas produced.