Standard system for removal of H2S out of biogas
Besides the Sulfurex® DMT also offers the possibility of desulphurisation without using any chemicals at all: The BioSulfurex®. This installation uses a biological system, requiring no (or in some cases minimal) chemicals or external utilities, for the removal of H2S from Biogas or landfill gas. The DMT BioSulfurex® system is a very cost effective method and yet still provides efficient removal of H2S.
Characteristics of the BioSulfurex® process:
- No chemicals needed
- Low capital and running costs
- High efficiency
- > 95% reductions in of H2S for incoming biogas with up to 1 vol. % (10.000 ppm H2S).
- Almost no utilities necessary
- No waste flow requiring treatment or transportation
- Safe process; All equipment & instrumentation Ex-proof
- Compressed air supply linked to the biogas flow and oxygen demand
Basic Process Description
The biogas is fed into a vertical column with packing media in a counter current pattern. The packing media provides sufficient contact surface area for the gas flow, nutrients and oxygen: it is also used as a carrier for the bacteria. Oxygen is added to the gas in the form of compressed air. The compressed air is brought into the column and when it moves up through the column, the bacterium treats the gas flow. An automatic control system adjusts the amount of air flow according to the actual requirement which in turn is correlated with the biogas flow. The amount of oxygen required depends on the amount of air and the oxygen already present in the flow. The nutrients are sprayed on top of the medial and refreshed automatically as required. Nutrients and trace elements can usually be sourced from the digested substrate or other natural sources (e.g. landfill leachate) and need not to be added artificially.
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