Settable solids
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Settable solids are those solids that will settle to the bottom of an Imhoff cone (a cone-shaped container) in one hour and determined by allowing a wastewater sample to stand for one hour in an Imhoff cone which enables to read the volume of the settled solids. It is expressed as mL/L and is important, because it is related to the efficiency of sedimentation tanks.
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