City of Nashua CSO Screening and Disinfection Facility Client: City of Nashua Location: Nashua, NH One of the nal pieces of the City of Nashua’s 12-year, $80 million Long Term CSO Control Program (LTCP) was the design and construction of a Screening and Disinfection Facility (SDF) to provide partial treatment for the two largest CSO discharges at CSO 005 and 006. A collection system model was developed during the LTCP planning process to evaluate baseline condition performance and the potential impact of CSO controls. Various CSO disinfection strategies were evaluated and Computational Fluid Dynamics (CFD) analysis was performed to conrm ow routing and disinfection contact times. The results of the modeling indicated that the recommended CSO control technologies would satisfy the requ

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