Corrosion failure in a large diameter reinforced concrete interceptor pipe and pockets of odor complaints from residents forced the City of St. Cloud to enact a systemwide mitigation plan. The City teamed with TKDA to develop a testing and improvement plan for odor and corrosion mitigation in their interceptor sewer system.
TKDA coordinated a sewage testing plan to determine concentrations of BOD, TSS, TS, nitrate and TKN, pH, dissolved oxygen, sulfate and sulfide. Following test completion, TKDA determined the most feasible method of treating or preventing the formation of odorous and corrosive compounds. Based on these results, TKDA designed a remotely operated chemical feed system along the gravity sewer system.