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Wet-Weather Pilot Studies Demonstrate Effectiveness of High-Rate Filtration Technologies

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Like many communities across the United States, Johnson County, Kansas and the City of St. Joseph, Missouri, are considering means to control collection system overflows from their publicly owned treatment works while maintaining or improving water quality. Planning studies for both communities evaluated several wet-weather treatment alternatives and included benchscale and pilot trials of the following processes during actual wet-weather peak flow conditions: (1) chemically enhanced sedimentation, (2) ballasted flocculation, (3) cloth media filtration, (4) dynamic tangential disc filtration and (5) compressible media filtration. These studies indicated that high-rate filtration processes, particularly compressible media filtration, produced effluent of a quality similar to that produced by high-rate clarification without the need for chemical coagulation and flocculation, and appear to be viable alternatives for certain wet-weather

treatment applications.
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Keywords: CSO; Compressible Media Filtration; High-Rate Treatment; Wet Weather

Document Type: Research Article

Publication date: 2010-01-01

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