Preventing Microbial Corrosion of Concrete in Wastewater Treatment Plants

Abstract

Thirty-one field investigations were carried out to prevent the microbial concrete corrosion occurred in the rural sewerage facilities. It was found that the corrosion mechanism was well defined by the hierarchical relation already reported. The following proposals, therefore, are made with the preventive methods to the microbial corrosion.
1) Fundamental measures such as controlling the generation of hydrogen sulfide are difficult to apply because of the uncertain effect and the cost problem.
2) The protective coating of concrete is the best way at the present time. The designation of protective coating should be classified with using three indexes of the condition, which are the concrete surface pH, the concentrations of hydrogen sulfide and carbon dioxide.