Changes of Nutrient Components in Ultrafiltration Membrane Concentrated Milk
Ultrafiltration(UF),as a membrane separation technology,is often used in the production of protein concentration in dairy processing.Based on ultrafiltration membrane concentration technology to produce high protein dairy products,the influence of the concentration multiple of ultrafiltration on the nutrients in milk was investigated.The pasteurized milk was filtered by a rolled ultrafiltration membrane with an interception volume of 10 kDa.According to the measure results of the concentrations of protein,calcium,sodium,potassium and lactose in the interception solution and through solution,it was found that the concentrations of protein,calcium and magnesium in the interception solution increased with the increase of the concentration multiple,and the concentrations were linearly correlated with the concentration multiple.The concentration of sodium,potassium and lactose remained stable,and there was no obvious linear relationship,indicating that lactose,sodium and potassium could freely pass through the ultrafiltration membrane hole.
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