“Hydrogen sulfide emission in sewer systems is associated with several problems, including biogenic corrosion of concrete, release of obnoxious odors to the urban atmosphere and toxicity of sulfide gas to sewer workers (ASCE, 1989; Nielsen and Keiding, 1998; Nielsen et al., 1998; US Environment Protection Agency (US EPA), 1974). Minor problems of concrete corrosion have been reported when the concentration of total sulfide in the wastewater is within the range of 0.1–0.5mg S L1. Severe concrete corrosion may occur at sulfide concentrations from 2.0mg S L1 on (Hvitved-Jacobsen et al., 2002). In Los Angeles County, approximately 10% of the sewer pipes are subject to significant sulfide corrosion, and the costs for the rehabilitation of these pipelines are roughly estimated at h400 million (Sydney et al., 1996). The restoration of the overall damaged sewer systems in Germany is estimated to cost about h100 billion per year (Kaempfer and Berndt, 1998). In Flanders (Belgium), biogenic sulfuric acid corrosion of sewers is approximated at h5 million per year, representing about 10% of total cost for wastewater collection and treatment (Vincke, 2002).”
WAT ER R E S EARCH 42 (2008) 1– 12, “Chemical and biological technologies for hydrogen sulfide emission control in sewer systems: A review”