The City of St. Robert, Missouri made the decision to install a new state-of-the-art sewer system. The goal was to use fewer lift stations and more gravity-based linear feet in order to move 50% of the city’s sewage. However, the challenge of a gravity-based system is how to oxygenate the sewage and control odor and corrosion. By installing one Vortex Flow unit the, the municipality was able to save the money it would have spent on adding chemicals to manage H2S emissions.