Increasing sustainability of biological gas desulfurzation


H2S is a toxic, odorous and corrosive gas, which contributes to air pollution, acid rain and smog. The biotechnological desulfurization technology is a sustainable alternative compared to commonly used physio-chemical process to desulfurize gas streams. It uses natron-alkaline conditions to remove H2S from the gas stream and sulfide oxidizing bacteria (SOB) to convert the H2S to elemental sulfur (S0). This research focusses on increasing the sustainability of the process by supressing the formation of the unwanted by-products sulfate and thiosulfate as these require caustic addition and produce a bleed stream.