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Permeation Rate During Reverse Osmosis of Milk Influenced by Osmotic Pressure and Deposit Formation
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1988
Year
Osmotic PressureMembrane FormationEngineeringOsmotic StressEnvironmental EngineeringOsmosisReverse OsmosisTransport PhenomenaMembrane BiologyDeposit FormationProcessing VariablesInorganic IonsMembrane CharacterizationMembrane PermeationMembrane ProcessMembrane TechnologyPermeation Rate
ABSTRACT During the concentration of milk by reverse osmosis deposited layers are formed on the membrane which constitute an additional resistance to permeation. Permeation is seen as mass flow through two resistances, namely laminar flow through the deposited layer and transport by diffusion through the membrane. A comparison of reverse osmosis of pure milk protein solutions and skim milk showed that inorganic ions increased the resistance to flow of the deposited layer considerably. The pressure loss through the deposited layer Δ p L was found by experiment. By means of regression analysis, mathematical relationships could be obtained to describe the effects of the processing variables on it.