Optimal Design of the Chicago Calumet Water Reclamation Plant (CCWRP) Primary Settling Tanks with 3D Numerical Models
Publication: World Environmental and Water Resources Congress 2008: Ahupua'A
Abstract
A three-dimensional numerical model was developed for the proposed primary settling tank (PST) for the Calumet Water Reclamation Plant (CWRP) in Chicago, IL. The numerical model can deal with three-dimensional multi-phase turbulent flow. Two-fluid model is used to capture the behavior of the solid-water mixture. Hindered settling was modeled by an empirical exponential relationship between the settling velocity and the solids concentration. The sludge was modeled as a Bingham plastic with parameters estimated from experiments. During the design, the most important parameters are the tank's depth and diameter. These two parameters are also the controlling factors for the construction cost. Other parameters include the inlet/outlet structure, feed well depth/diameter, bottom slope, etc. The tank diameter is fixed due to the space restriction. The tank depth and feed well depth were analyzed by comparing different options. Once these two parameters were fixed, other parameters were fine tuned to optimize the performance of the tank. Due to the length of this paper, only the simulations for the tank depth and the feed well depth are introduced.
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Copyright
© 2008 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Ecosystems
- Engineering fundamentals
- Environmental engineering
- Equipment and machinery
- Flow (fluid dynamics)
- Fluid dynamics
- Fluid mechanics
- Hydrologic engineering
- Mathematics
- Models (by type)
- Numerical models
- Parameters (statistics)
- Sedimentation tanks
- Statistics
- Tanks (by type)
- Three-dimensional flow
- Three-dimensional models
- Water and water resources
- Water reclamation
- Water tanks
- Water treatment
- Water treatment plants
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