What is biogas?

Biogas is a source of energy produced through anaerobic fermentation of various types of organic matter. This process is also known as anaerobic digestion and is carried out by the microbial communities put under certain conditions.

The generated gas is made of methane (CH4), carbon dioxide (CO2) and trace elements of other gases, hydrogen sulphide (H2S) being one of them.

Anaerobic digestion also generates a type of digestate that is rich in nutrients (N, P, K, Ca, etc.) and organic matter that has lower levels of odours and whose main field of application is agriculture, where it is used as mineral fertiliser for crops

A large number of biogas installations (landfills, digesters, etc.) has inspired Ferro Bio to design a range of materials adjustable to all types of scenarios. This way, based on the requirements and specifications of the installations in question our team of engineers will devise the most efficient system to install, taking into consideration the residence time, concentration of contaminants such as hydrogen sulphide (H2S), volatile organic compounds (VOC) or siloxanes among others.

Desulphurising techniques

To avoid corrosion damages inflicted by H2S two techniques can be applied:

In Situ: Implies acting during the liquid phase (digestate) by applying iron-oxide and hydroxide minerals. In order to prevent bacteria from producing H2S gas, Ferro Bio must be added directly into the digester.

This will trigger the chemical reaction, creating Iron Sulphide and Sulphur, which, in turn, will avoid the creation of H2S.

Gas-phase: In this case, the technique is applied once the biogas has been created without being previously treated. Therefore, it takes place when the gas carries H2O.