Bio Gas Scrubbing

Anaerobic Digesters and landfill sites can produce biogas with high levels of impurities. Hydrogen Sulphide in particular above 500mg/m3 can result in high maintenance costs for electrical power generators. These additional costs arise through frequent oil changes and internal corrosion. For Bio Methane to be produced as a saleable fuel, there is also a requirement to remove H2S and other Sulphur compounds. At many sites, H2S levels can fluctuate significantly throughout the year and from year to year.  Regular monitoring of H2S levels is always recommended. 

   
 
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Further Info

Hydrogen Sulphide

The SulfaTreat dry scrubbing process is ideal for this application. It is suitable for water saturated streams and the material has an indefinite inactive life. Vessels can therefore remain in the standby mode for long periods of time. A lead/lag vessel configuration is recommended to achieve optimum running costs. Maximum efficiency and life is achieved if trace levels of oxygen are present in the stream.
Single tower typically with 3.0m height of snow flake packing. Sump retention times are less than 2 minutes.

 

Siloxane

 Siloxane compounds are present in many domestic products. As a consequence Siloxane concentrations in bio gas can reach levels at which serious damage to the combustion chambers of power generators can occur. A further dry scrubbing process after H2S removal will result in Siloxane concentrations being reduced. 
Siloxane compounds are present in many domestic products. Siloxane treatment normally follows after H2S treatment.

 

 
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