Desulferization

The substrate introduced in biogas plants also contains sulfur compounds that are converted to hydrogen sulfide during fermentation. Theses must be removed from the biogas due to their toxic, environmentally harmful, and, above all, corrosive properties (damage to downstream devices and systems such as pumps and engines). The processes used for this must be monitored for proper functioning, and the purified gas must be monitored for compliance with permissible residual concentration.

UNION Instruments uses its modular INCA gas analyzer for this in a version that is optimally configured to the specific desulferization process. The measuring points are located upstream and downstream of the desulferization plant. This solution measures H2S and sometimes (in the case of biological desulferization) also oxygen. INCA has a special patented technology for the continuously reliable measurement of H2S in gases. Ideally suited device implementation for this:

Reliable monitoring of the desulferization or residual content of hydrogen sulfide in the biogas determines its safe usability on site and for infeed into the gas network after conditioning. Furthermore, the measured values provide important information for process control, e.g., for timely changing of activated carbon filters. They also assure the plant owner of compliance with regulatory requirements.