Experimental Data and Theoretical Analysis of Particle Removal Efficiency in a Novel Hydraulic Separation Unit
Publication: Journal of Environmental Engineering
Volume 132, Issue 10
Abstract
This research investigates the removal efficiency of a novel hydraulic separation unit—a counter-current upflow column that hydraulically separates sediment particles based on size—for washing contaminated soils with remediation technology. Significant attributes of the new design include the capability for continuous loading and the use of a side-entry tee as a slurry port. Eight tests were performed in a bench-scale model of the hydraulic separation unit to experimentally determine the impact of washwater and slurry flow rates on removal efficiency. After analyzing the experimental results qualitatively, a theoretical residual power approach was used to predict removal efficiency and analyze soil/fluid interaction under the varying flow rates. Optimal separation was obtained for three tests. The residual power analysis revealed two conditions for the optimal tests: (1) the slurry flow rate dominates the approach flow rate at the slurry mixing-jet and the power analysis is a good predictor; and (2) the approach flow rate dominates separation, fluidizing both fine and coarse particles, and agreement with the power analysis is poor.
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Acknowledgments
The writers would like to acknowledge the University of Dayton Research and Grant Study Enhancement Fund for support of this project. They would also like to acknowledge Jim Fox, General Contractor in Akron, Ohio, for technical advice on this project.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 132 • Issue 10 • October 2006
Pages: 1307 - 1313
Copyright
© 2006 ASCE.
History
Received: Mar 19, 2005
Accepted: Feb 13, 2006
Published online: Oct 1, 2006
Published in print: Oct 2006
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