The Yorkville-Bristol Sanitary District faced multiple challenges including capacity constraints from population growth and industrial loads, space limitations, and phosphorus discharge compliance requirements. In 2017, they implemented ZeeLung MABR technology as a solution. When increased flow created new clarifier capacity challenges, the facility was further upgraded in 2023 with ZeeLung MABR with zeeDENSE technology providing a 40% increase in secondary clarifier capacity without new construction and 75% chemical savings from optimized biological phosphorus removal.