2. Design a sedimentation treatment system for raw water with the following characteristics: Maximum daily flow...
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2. Design a sedimentation treatment system for raw water with the following characteristics: Maximum daily flow Average daily flow = Coagulant = Settling velocity of floc= 4 m/s %3D 3 m/s %3D alum 3.2 m/hr Your design should be for a horizontal flow rectangular basin with a chain and scrapper sludge removal system. You can assume the dynamic viscosity of water of 0.00131 kg/m-s and a density of 999.7 kg/m?. You should specify the number of sedimentation basins, the basin dimensions the hydraulic residence time and the horizontal flow velocity. Sludge scrappers are in a standard 6 meter length so basin width should be in increments of 6 meters. Pay attention to the area, length, width, detention time and horizontal velocity. Design for a maximum 3 sedimentation tanks. Parameter Units Value Unitless 2 Mi Minimum number of tanks Water depth Minimum length- to -depth ratio Unitless 15:1 Width -to -depth ratio Meters 3 to 5 Unitless 3:1 to 6:1 Minimum length to width ratio Unitless 4:1 to 5:1 Overflow rate Im/hr 1.25 to 2.5 Horizontal mean flow velocity m/min 0.3 to I.I Detention time |hr 1.5 to 4 *Number of tanks should be sufficient to allow one tank to be taken off-line for maintenance without causing overloading of remaining tank(s). 2. Design a sedimentation treatment system for raw water with the following characteristics: Maximum daily flow Average daily flow = Coagulant = Settling velocity of floc= 4 m/s %3D 3 m/s %3D alum 3.2 m/hr Your design should be for a horizontal flow rectangular basin with a chain and scrapper sludge removal system. You can assume the dynamic viscosity of water of 0.00131 kg/m-s and a density of 999.7 kg/m?. You should specify the number of sedimentation basins, the basin dimensions the hydraulic residence time and the horizontal flow velocity. Sludge scrappers are in a standard 6 meter length so basin width should be in increments of 6 meters. Pay attention to the area, length, width, detention time and horizontal velocity. Design for a maximum 3 sedimentation tanks. Parameter Units Value Unitless 2 Mi Minimum number of tanks Water depth Minimum length- to -depth ratio Unitless 15:1 Width -to -depth ratio Meters 3 to 5 Unitless 3:1 to 6:1 Minimum length to width ratio Unitless 4:1 to 5:1 Overflow rate Im/hr 1.25 to 2.5 Horizontal mean flow velocity m/min 0.3 to I.I Detention time |hr 1.5 to 4 *Number of tanks should be sufficient to allow one tank to be taken off-line for maintenance without causing overloading of remaining tank(s).
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Related Book For
Foundations in Microbiology
ISBN: 978-0073375298
8th edition
Authors: Kathleen Park Talaro, Barry Chess
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