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UDC 628.147.22:576.8
Vasilyev V. M., PANKOVA G. A., Stolbikhin Iu. V.
Deterioration of sewage tunnels and in-line structures as a result of microbiologic corrosion
Summary
The process of microbiology corrosion of sewers and structures was considered; corrosion protection is a most expensive issue in operating wastewater facilities. General cost of rehabilitating corroded structures amounts to billions euro annually. The present-day concept of a complicated microbiologic corrosion process affected by a great number of different factors such as higher turbulence, and as a result high degree of wastewater flow degassing, is presented. The main indicator of the problem, i. e. concentration of hydrogen sulfide in the ambient air of the structure, is determined. The results of sewer wells inspection in St. Petersburg and their analysis are presented. The high rate of corrosion and extreme operating conditions of No. 10 sewer well are recorded.
Key words
wastewater , sewer , microbiologic corrosion , reinforced concrete
