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Examination of Whey Degreasing by Modified Membrane Filtration

Journal of Agricultural Science and Technology(B) 2016年第1期6卷 57-66页

作者： Szilard Szelpal Zsuzsanna Kohany Eszter Fogarassy Jozsef Csanadi Gyula Vatai cecilia hodur Department of Process Engineering Faculty of Engineering University of Szeged Moszkvai krt. 5-7 1-1-6725 Szeged Hungary Department of Food Engineering Faculty of Food Science Corvinus University of Budapest Menesi ut 44 H-1118 BudapestHungary Department of Food Engineering Faculty of Engineering University of Szeged Moszkvai krt. 5- 7 H-6725 Szeged Hungary

The largest amount of dairy by-products, especially the whey, comes from the manufacture of cheese. The whey proteins are used in several different industry technologies. The forage production is used for animal feeding in the forms of various flours mixed in feeds, and the food industry uses whey proteins as human nutrition, such as different dry soups, infant formulas and supplements. The fat components of whey may inhibit the efficient processing and might impair the use of whey in these technologies. Thus, the aim of the experiment was to investigate a cheap and economical separation of the lipid fraction of whey. This separation method was made by microfiltration, which is an inexpensive, effective and energy efficient method for this task. During the measurements, 0.2 μm and 0.45 μm microfiltration membranes were used in a laboratory tubular membrane filtration module, and the membrane separation method was combined and modified by using astatic mixer and/or air insufflation. The same pore size membranes were used in a vibrating membrane filtration equipment （VSEP）, too. The two different membrane filtration devices allowed the comparison of the effect of vibration and the effect of the static mixer and/or air insufflation. The flux values above 0.2 MPa transmembrane pressures strongly decreased on using the tubular membrane. Therefore, it can be determined that the use of the lower transmembrane pressures gave better flux combined with air insufflation and the use of static mixer. The flux values increased three times higher with using vibration during the microfiltration process than that without vibration. Comparing these methods, it can be concluded that the separation made on tubular membrane （0.2 μm） combined with statics mixer gave sufficient result according to the degreasing, retentions and flux values of the other components.

关键词： Degreasing membrane filtration vibrating membrane filtration equipment air insufflation static mixer.

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