Study of Effluent Disinfection for Urban Rivers in Chicago

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Abstract:

Consoer Townsend Envirodyne Engineers, Inc. (CTE) was retained in 2004 by the Metropolitan Water Reclamation District of Greater Chicago (District) to provide engineering services to prepare a comprehensive Infrastructure and Process Needs Feasibility Study (Feasibility Study) for the North Side Water Reclamation Plant (WRP) and conduct studies of water quality management options for the urban rivers of Chicago. This paper documents the results of the CTE study of effluent disinfection alternatives for the District's North Side, Calumet and Stickney WRPs which have average design flows of 333 million gallons per day (MGD), 354 MGD and 1,200 MGD, respectively. The results of this study will be used by the state and federal environmental protection agencies in the Use Attainability Analysis (UAA) being conducted for the urban receiving rivers of the three District WRPs. As part of the UAA, there is a possibility that the current secondary contact use for the urban rivers of Chicago may be changed which may require effluent disinfection at the District's North Side, Calumet and Stickney WRPs. The cost of effluent disinfection must be considered in the UAA process along with the potential public health impacts. Based upon the cost estimate and depending upon the effluent disinfection technologies chosen, the combined capital cost for effluent disinfection for the three largest District WRPs could exceed $1.8 billion and annual operation and maintenance costs could exceed $43 million.

Keywords: CHICAGO; DISINFECTION; EFFLUENT; WATERWAYS

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193317707X224121

Affiliations: 1: Consoer Townsend Envirodyne Engineers, Inc 2: Metropolitan Water Reclamation District of Greater Chicago 3: Drexel University 4: John Hopkins Bloomberg School of Public Health 5: University of Illinois

Publication date: July 1, 2007

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