Microbial-induced concrete deterioration in sewer environment: Mechanisms and Microbial populations
Author(s): Peyre Lavigne, M., Lors, C., Valix, M., Herisson, J., Paul, E., and Bertron, A
Paper category: Conference
Book Title: International RILEM Conference on Microorganisms-Cementitious Materials Interactions
Editors: Virginie Wiktor, Henk Jonkers, Alexandra Bertron
Publisher: RILEM Publications SARL
Publication year: 2016
Total Pages: 17
Abstract: Microbial Induced Concrete Corrosion (MICC) in sewer environment leads to several problems during the collection of wastewater, as infiltration of rain water into the wastewater treatment system, and as leaching of polluted wastewater in the soils and/or in the groundwater.
Currently, this complex phenomenon is described by the links of successive processes.Hydrogen sulfide (H2S) production by sulfate-reducing bacteria in the immersed stagnant zones of the sewer induced at the wall of non-immerged zones the colonization of sulfuroxidizing bacteria. These bacteria under aerobic conditions convert reduced sulfur compounds to sulfuric acid as end-product. This local acid production leads to the deterioration of the concrete infrastructures by dissolution of the original hydrated phases and their mineralogical changes.
During the last 50 years, in situ experiments were conducted in different place in the world. Some general principles are commonly admitted to describe MICC in sewers environment. However, few cementitious materials were investigated, with lacks in the description of the deterioration mechanisms as in the microbial populations involved.
This paper presents a state of the art of this phenomenon, including microbial communities associated to biological and chemical processes involved. The first objective is to propose a synthesis of the studies operated in sewers during the last 50 years, and the second based on the last works published underlining the understanding lacks in the interactions of microorganisms and cementitious materials.
Online publication: 2016
Publication Type: full_text
Public price (Euros): 0.00