H2S Removal from Agricultural Biogas

Agricultural Biogas Production and Use

Agricultural biogas produced in farm-based anaerobic digesters or covered lagoons can be used as a fuel source to power generator sets, or converted to compressed natural gas on-site or at third-party compressor stations through utility pipeline transmission.


In order to meet sulfur dioxide emission limits on engine exhausts H2S may need to be removed prior to combustion. In cases of extremely low general emission limits, where a catalytic converter is necessary, the H2S must be removed prior to combustion or the life of the expensive catalyst will be reduced substantially.


Typical User Conditions
Flow rates are typically low to mid-range, 100scfm to 1,000scfm, but H2S concentrations are generally high, in some cases up to 10,000ppmv. Importantly, concentrations can vary widely and seasonally according to water sources and the addition of other material to the digester.
