Recent Advances In Microbial Capture Of Hydrogen Sulfide From Sour Gas Via Sulfur-Oxidizing Bacteria
ENGINEERING IN LIFE SCIENCES(2021)
Abstract
Biological desulfurization offers several remarkably environmental advantages of operation at ambient temperature and atmospheric pressure, no demand of toxic chemicals as well as the formation of biologically re-usable sulfur (S-0), which has attracted increasing attention compared to conventionally physicochemical approaches in removing hydrogen sulfide from sour gas. However, the low biomass of SOB, the acidification of process solution, the recovery of SOB, and the selectivity of bio-S-0 limit its industrial application. Therefore, more efforts should be made in the improvement of the BDS process for its industrial application via different research perspectives. This review summarized the recent research advances in the microbial capture of hydrogen sulfide from sour gas based on strain modification, absorption enhancement, and bioreactor modification. Several efficient solutions to limitations for the BDS process were proposed, which paved the way for the future development of BDS industrialization.
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Key words
absorption enhancement, bioreactor modification, hydrogen sulfide, metabolic engineering, microbial capture, sulfur-oxidizing bacteria
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