“…Gas emissions from point sources by some of the largest CO 2 emitting industries, such as petroleum refineries (Perez, 2013; Vostrikov et al , 2017), steel (Mochizuki and Tsubouchi, 2017), pulp and paper (de Souza, 1988) and power production industry (particularly geothermal) (Kristmannsdóttir et al , 2000), as well as biogas production, are often accompanied by various impurities (Osorio and Torres, 2009; Vostrikov et al , 2017). A major concern when upgrading these gas streams in the context of CCU is that H 2 S, as one of the more common impurities, can already be toxic for microorganisms, both in pure culture and within microbial communities, at concentrations of a few ppm (Wu et al , 2015).…”