International Gas Research Conference, 1995. The BIO-SRTM process is an emerging liquid redox technology for the removal of hydrogen sulfide from subquality natural gas. The BIO-SR liquid reagent is maintained at a pH in the range of 1.5 to 2.0 to sustain its selectivity for hydrogen sulfide even in the presence of carbon dioxide. The distinquishing feature of the process is the use of nodegradable ferric sulfate solution which is regenerated by robust and resilient Thiobacillus ferrooxidans bacteria, thereby eliminating the costs associated with replenishing degradable liquid redox reagents, such as chelated iron. This is also a primary driving force behind the favorable economics and low operating costs of the BIO-SR process.
Sulfur is recovered from the process as elemental sulfur.
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