An elutriation apparatus for assessing settleability of combined sewer overflows (CSOs)

J. Marsalek, B.G. Krishnappan, K. Exall, Q. Rochfort & R.P. Stephens
ABSTRACT An elutriation apparatus was proposed for testing the settleability of CSOs and applied to 12 CSO samples. In this apparatus, solids settling is measured under dynamic conditions created by flow through a series of settling chambers of varying diameters and upward flow velocities. Such a procedure reproduces better turbulent settling in CSO tanks than the conventional settling columns, and facilitates testing coagulant additions under dynamic conditions. Among the limitations, one could name the relatively...
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