title: Global sensitivity analysis of an in-sewer process model for the study of sulfide-induced corrosion of concrete.
abstract: The presence of high concentrations of hydrogen sulfide in the sewer system can result in corrosion of the concrete sewer pipes. The formation and fate of hydrogen sulfide in the sewer system is governed by a complex system of biological, chemical and physical processes. Therefore, mechanistic models have been developed to describe the underlying processes. In this work, global sensitivity analysis was applied to an in-sewer process model (aqua3S) to determine the most important model input factors with regard to sulfide formation in rising mains and the concrete corrosion rate downstream of a rising main. The results of the sensitivity analysis revealed the most influential model parameters, but also the importance of the characteristics of the organic matter, the alkalinity of the concrete and the movement of the sewer gas phase.
authors.affiliation: Research Department, Aquafin NV, Dijkstraat 8, B-2630 Aartselaar, Belgium E-mail: brecht.donckels@aquafin.be.
authors.forename: B M R
authors.initials: BM
authors.lastname: Donckels
authors.affiliation: Research Department, Aquafin NV, Dijkstraat 8, B-2630 Aartselaar, Belgium E-mail: brecht.donckels@aquafin.be.
authors.forename: S
authors.initials: S
authors.lastname: Kroll
authors.affiliation: Research Department, Aquafin NV, Dijkstraat 8, B-2630 Aartselaar, Belgium E-mail: brecht.donckels@aquafin.be.
authors.forename: M
authors.initials: M
authors.lastname: Van Dorpe
authors.affiliation: Research Department, Aquafin NV, Dijkstraat 8, B-2630 Aartselaar, Belgium E-mail: brecht.donckels@aquafin.be.
authors.forename: M
authors.initials: M
authors.lastname: Weemaes
mesh_terms: D003343:Corrosion; D004323:Drainage, Sanitary; D008962:Models, Theoretical; D013440:Sulfides / Q000737:chemistry*
chemical_list: D013440:Sulfides