Design and Evaluation

How does an engineer design a wastewater system to counter the corrosion effects of hydrogen sulfide gas [H2S]and sulfuric acid? The simple answer is,... reduce the conditions that generate H2S. Even so, this is not always possible nor economical. Excluding piping, approximately 40 percent of a wastewater system is made up of concrete structures. Therefore, some means of reducing the corrosion of concrete must be utilized. It must be effective and economical. This paper presents the "state of the art " information, circa 1995, for solving the problem of Microbial Induced Corrosion in sewer systems. It contains a total systems approach for design, known as H2S MODELING DESIGN METHOD, which utilizes a time-tested method for estimating hydrogen sulfide generation and subsequent corrosion in sewer systems. This systems approach also addresses products such as high alkalinity concrete, antimicrobial concrete,[3] impervious coatings, inert liners and inert pipe. These products can be used alone or in combinations, as the levels of protection warrant