The Effect of Temperature and Transmembrane Pressure on the Camel Milk Ultrafiltration Performance: An Optimization Study

Document Type : Research Paper

Authors

1 Department of Food Science and Technology, Ferdowsi University of Mashhad (FUM), POBox: 91775-1163, Mashhad, Iran

2 Division of Food Engineering, Department of Food Science and Technology, Ferdowsi University of Mashhad (FUM), Iran

3 Department of Food Science and Technology, Ferdowsi University of Mashhad, POBox: 91775-1163, Mashhad, Iran

10.22079/jmsr.2021.521519.1432

Abstract

In this study, the effects of transmembrane pressure (TMP, 80-160 kPa) and temperature (T, 20-40 oC) were investigated  on the ultrafiltration (UF) performance of camel milk, including pseudo-steady state permeate flux (JPSS), intrinsic membrane resistance (Rm), reversible fouling resistance (Rrf), irreversible fouling resistance (Rif), solutes rejection (protein (RP), lactose (RL), ash (RA) and total solids (RTS)) and minerals rejection (aluminum (RAl), iron (RFe), zinc (RZn),  manganese (RMn), calcium (RCa), phosphorus (RPh), sodium (RNa), magnesium (RMg), and potassium (RK)). According to the obtained results, increasing TMP led to a significant increase in JPSS, Rrf, and RA while increasing T caused a  significant increase in JPSS, Rrf, RL, RA, and the rejection of all minerals. Although the total fouling resistance (Rf)  increased by increasing TMP and T, the share of Rrf was higher in high TMP and T compared to Rif. The results also  showed that none of the linear, quadratic, and interaction effects of TMP and T on the Rm, RTS, and RP of the samples  were significant. In general, camel milk solute rejections, i.e., RTS, RP, RL, RA, RAl, RFe, RZn, RMn, RCa, RPh, RNa, RMg,  and RK were, on average, 51.03, 97.51, 4.73, 34.07, 99.05, 95.70, 90.64, 99.99, 46.09, 32.74, 20.44, 19.44, and 7.78%,  respectively. Finally, the optimum UF performance conditions in this research with the lowest Rrf, Rif, RL, and RA while the  highest JPSS and RP were 135 kPa TMP and 35 ºC T. 

Graphical Abstract

The Effect of Temperature and Transmembrane Pressure on the Camel Milk Ultrafiltration Performance: An Optimization Study

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