Mechanisms and Processes of Concrete Corrosion in Sewers

Li, X; Jiang, G; Grengg, C; Mittermayr, F

Mechanisms and Processes of Concrete Corrosion in Sewers

Li, X

Jiang, G Grengg, C Mittermayr, F

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Publisher:: Springer
Publication Type:: Chapter
Citation:: Microbiologically Influenced Corrosion of Concrete Sewers: Mechanisms, Measurements, Modelling and Control Strategies, 2023, pp. 21-34
Issue Date:: 2023-01-01

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Field	Value	Language
dc.contributor.author	Li, X https://orcid.org/0000-0003-1768-9556
dc.contributor.author	Jiang, G
dc.contributor.author	Grengg, C
dc.contributor.author	Mittermayr, F
dc.date.accessioned	2023-09-30T04:47:41Z
dc.date.available	2023-09-30T04:47:41Z
dc.date.issued	2023-01-01
dc.identifier.citation	Microbiologically Influenced Corrosion of Concrete Sewers: Mechanisms, Measurements, Modelling and Control Strategies, 2023, pp. 21-34
dc.identifier.isbn	978-3-031-29940-7
dc.identifier.uri	http://hdl.handle.net/10453/172407
dc.description.abstract	Concrete corrosion in sewers is caused by the combination of chemical and biological processes including sulfide and carbon dioxide generation and partition in wastewater, sulfide oxidation, neutralizing reactions of carbon dioxide, hydrogen sulfide, and its oxidation products (mainly sulfuric acid) with concrete. Wastewater is a sulfate-rich environment with sufficient carbon sources. The metabolism of sulfate-reducing bacteria leads to the formation of hydrogen sulfide in wastewater under anaerobic conditions. During wastewater transport through the sewers, depending on the dissolved oxygen concentrations and pH in wastewater, hydrogen sulfide can be chemically or biologically oxidized in wastewater, or partition into sewer gas in gravity sewers. Due to the alkaline and porous nature of concrete sewer pipes, the hydrogen sulfide reacts with intact concrete and reduces the concrete pH, lowering the concrete surface pH through chemically induced corrosion. The additional outgassing of CO2 from the wastewater further accelerates these processes. The reduction of surface pH facilitates the colonization of sulfide-oxidizing microorganisms on concrete surfaces. Sulfide-oxidizing microorganisms can further biologically oxidize hydrogen sulfide into sulfuric acid, leading to microbiologically influenced concrete corrosion. This chapter describes and discusses the mechanisms of these processes in sewers.
dc.format.extent	12
dc.language	en
dc.publisher	Springer
dc.relation.ispartof	Microbiologically Influenced Corrosion of Concrete Sewers: Mechanisms, Measurements, Modelling and Control Strategies
dc.relation.ispartofseries	Engineering Materials
dc.relation.isbasedon	10.1007/978-3-031-29941-4_2
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.title	Mechanisms and Processes of Concrete Corrosion in Sewers
dc.type	Chapter
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	recently_added	*
pubs.consider-herdc	false
dc.date.updated	2023-09-30T04:47:40Z
pubs.place-of-publication	Switzerland
pubs.publication-status	Published
dc.location	Switzerland

Abstract:

Concrete corrosion in sewers is caused by the combination of chemical and biological processes including sulfide and carbon dioxide generation and partition in wastewater, sulfide oxidation, neutralizing reactions of carbon dioxide, hydrogen sulfide, and its oxidation products (mainly sulfuric acid) with concrete. Wastewater is a sulfate-rich environment with sufficient carbon sources. The metabolism of sulfate-reducing bacteria leads to the formation of hydrogen sulfide in wastewater under anaerobic conditions. During wastewater transport through the sewers, depending on the dissolved oxygen concentrations and pH in wastewater, hydrogen sulfide can be chemically or biologically oxidized in wastewater, or partition into sewer gas in gravity sewers. Due to the alkaline and porous nature of concrete sewer pipes, the hydrogen sulfide reacts with intact concrete and reduces the concrete pH, lowering the concrete surface pH through chemically induced corrosion. The additional outgassing of CO2 from the wastewater further accelerates these processes. The reduction of surface pH facilitates the colonization of sulfide-oxidizing microorganisms on concrete surfaces. Sulfide-oxidizing microorganisms can further biologically oxidize hydrogen sulfide into sulfuric acid, leading to microbiologically influenced concrete corrosion. This chapter describes and discusses the mechanisms of these processes in sewers.

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http://hdl.handle.net/10453/172407