Maximizing Final Settling Tank Capacity at the Northeast Ohio Regional Sewer District Wastewater Treatment Facilities Using CFD Modeling

Computational fluid dynamic (CFD) modeling was used to evaluate and maximize final settling tank (FST) performance and capacity at two facilities. Circular and rectangular FST performance and capacity was evaluated and increased by optimizing baffling, launder, and sludge removal improvements and improving sludge quality. CFD modeling provided a rationale and technical basis for increasing the rated capacity of the existing and new FSTs above “10-State Standards Recommended Guidelines” and saved the District in excess of $40 million.