Resumen de Development of a biotrickling filter for the removal of H2S from biogas
One of the most important obstacles to widespread the use of biogas by injecting it on the natural gas grid or using it in fuel cells is related to the strict requirements concerning gas quality, as some detrimental compounds like hydrogen sulphide must be almost completely removed for these uses. Nowadays H2S is mainly removed by expensive physical-chemical methods. The objetive of this study is the devolpment of a cost-effective biotrickling filter for treating biogas containing high concentrations of H2S (2000 ppmv) in order to reduce it to less than 3 ppmv. With this intention a laboratory trickle bed filter was set up. It was found that for H2S inlet concentrations up to 900 ppmv the H2S outlet concentration was < 3 ppm with an efficiency > 99%.
