Characterization of Corrosion Microbial Communities
The corrosive conditions in sewers influence the corrosion development on concrete sewers. With the corrosion development, the continuous acid production alters the corrosion layer conditions and the microbial community. This chapter briefly discussed the dynamic corrosive conditions within sewers and their impacts on corrosion development. H2S concentration, temperature, relative humidity, and contact with wastewater are critical environmental factors for corrosion development. The pH reduction due to corrosion development changed the corrosion layer conditions and corrosion microbial communities, where a temporal succession from neutrophilic sulfur-oxidizing microorganisms (NSOM) to acidophilic sulfide-oxidizing microorganisms (ASOM) occurs. Through culture-dependent and culture-independent detection approaches, a diverse range of NSOM and ASOM was detected in corrosion layers along with heterotrophic microbes. The functions and physiology of core members in corrosion communities, especially in relation to the corrosion process are summarized.
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