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Low Velocities in Force Mains: Impacts and Solutions

Weftec 2011 Weftec 2011 Low Velocities in Force Mains: Impacts and Solutions Sean O Rourke, Bo Copeland, Weftec 2011 Low Velocities in Force Mains (FMs): Presentation Outline Overview Complications and consequences Contributing factors Standards and engineering practice Design and O&M Solutions Case studies Conclusion Questions Weftec 2011 Overview: Low Velocity in Force Mains Primary Concerns: deposition pocket accumulation (incl. air binding) / Biofilm accumulation Which can lead to: Pipe deterioration Reduced asset life Increased life-cycle cost Weftec 2011 Overview: Solid-liquid Horizontal Flow Behavior Behavior is dependent on fluid properties, velocity, particle sizes, density, etc.

4. USEPA (2000) “Wastewater Technology Fact Sheet: Sewers, Force Main”: EPA 832-F-00-071. 5. Departments of the Army and the Air Force (1985) “Sanitary and Industrial Wastewater Collection—Pumping Stations and Force Mains”: Army TM 5-814-2, Air Force AFM 88-11, Vol. 2. 6.

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  Solutions, Fact, Sheet, Technology, Wastewater, Impact, Main, Force, Sewer, Velocities, Impacts and solutions, Wastewater technology fact sheet, Low velocities in force mains

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