Trotter and Associates are working with the Village of Roselle to design and implement improvements at their J. Botterman Sewage Treatment Plant. The project includes replacing the existing screening equipment within the Headworks Building, converting the existing oxidation ditch biological process to an AlternatIR Carrousel process for biological nutrient removal, and rehabilitating the Final Clarifiers. The project is in the final design phase, and construction is expected to begin in 2025.