Under the anaerobic conditions common in sewage, sulfate is reduced to hydrogen sulfide by sulfate-reducing bacteria (3). The emission of hydrogen sulfide in gravity sewer sections, sewage pumping stations, and inlet structures of wastewater treatment plants induces sulfide oxidation to form corrosive sulfuric acid on concrete surfaces exposed to air (4, 5). The presence of sulfate in wastewater and its conversion to sulfide in anaerobic sewers are generally considered unavoidable, and water utilities around the world have been focusing on the removal of sulfide after its formation (3, 5–7), incurring mitigation costs comparable to the value of asset losses (3).