Overview
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Read the articleAUTHORS
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Pierre BLAZY: Professor at the Institut National Polytechnique de Lorraine (INPL) - Director, Centre de Recherche sur la Valorisation des Minerais (CRVM)Laboratoire Environnement et Minéralurgie (LEM) - CNRS UMR 75-69 (ENSG-INPL)
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El-Aïd JDID: Doctor of Science - Research Engineer at CRVM, LEM - CNRS UMR 75-69 (ENSG-INPL)
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Jean-Luc BERSILLON: Doctor of Philosophy - Professor at INPL - LEM UMR 75-69 (ENSG-INPL)
INTRODUCTION
Decanting is a unitary operation, among the liquid-solid separation techniques based on the sedimentation phenomenon, which consists of separating suspended particles from a liquid using gravitational forces. The processes used differ depending on whether the aim is simply to increase the concentration of solids (thickening) or to obtain a clear liquid from a diluted suspension (clarification).
Sedimentation takes place on different types of suspended solids, among which two opposing behaviors can be distinguished: that of granular particles, which settle independently of each other, and that of more or less flocculated particles, which have variable falling speeds, depending on the size of the flocs and their abundance.
The theory of settling and the procedure for sizing equipment take these considerations into account.
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