Overview
ABSTRACT
This article analyzes the transfer mechanisms that occur during the reverse osmosis (RO), nanofiltration (NF), ultrafiltration (UF) and microfiltration (MF). These methods of liquid-phase separation by permeation through permselective membranes under the action of a pressure gradient involve complex phenomena. The purpose of this theoretical presentation is to enable the user to achieve a better understanding of each of these techniques in order to at best optimize their implementation.
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Read the articleAUTHORS
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Pierre AIMAR : Chemical Engineering Laboratory UMR CNRS/INP/UPS Paul Sabatier University (Toulouse)
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Patrice BACCHIN : Chemical Engineering Laboratory UMR CNRS/INP/UPS Paul Sabatier University (Toulouse)
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Alain maurel : Consultant
INTRODUCTION
The aim of this dossier [J 2789] is to analyze the transfer mechanisms involved in membrane filtrations such as :
OI reverse osmosis;
nanofiltration NF ;
UF ultrafiltration;
MFT microfiltration;
so that the user can identify the most limiting transfer mechanisms for a given application, and understand the influence of operating conditions on process operation.
After a few general points, we present the theoretical considerations required to analyze the transfer mechanisms that determine process operation: filtration speed, material accumulation and selectivity. This dossier forms the theoretical basis on which the
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Membrane filtration (IO, NF, UF, MF) - Theoretical aspects: transfer mechanisms
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