Dewberry provided a variety of engineering services on the project, including planning-level criteria for improvements based on projected growth and regulatory requirements, an alternatives analysis with a preliminary opinion of probable construction cost and estimated operations and maintenance cost for each alternative, and an implementation plan for the recommended alternatives. The design of the secondary process improvements included primary effluent chemical oxygen demand (COD) fractionalization, BioWin model development, BioWin model calibration of existing treatment process, custom Johannesburg biological nutrient removal (BNR) secondary process, secondary clarifiers, supervisory control and data acquisition (SCADA) system improvements, an energy-efficient aeration system, a blower and chemical building, and new process pumps with return activated sludge and waste activated sludge and scum in the treatment complex.

“This system needed to be expanded and upgraded in order to meet the increasing regulatory demands and anticipated growth of the surrounding community,” says Dewberry Project Manager Patrick Radabaugh, PE. “Our team was proud to provide engineering design services for this improved facility.”