Application of cross-flow ultrafiltration on inorganic membranes in purification of food materials
Hinkova, A.(Vysoka Skola Chemicko-technologicka, Prague (Czech Republic). Ustav Chemie a Technologie Sacharidu) | Bubnik, Z.E-mail:zdenek.bubnik@vscht.cz | Pour, V. | Henke, S. | Kadlec, P.
This paper brings data on ultrafiltration on inorganic membranes (MEMBRALOX, France, mean pore size 20 and 100 nm, 0.8 m long, filtration area 0.2 square m) which were used for the purification of different liquid materials from the food industry, such as egg blend, amaranth starch suspension, and caramel (i.e. natural colorant). The ultrafiltration was carried out on a pilot plant filtration unit TIA (Bollene, France), cross-flow permeate fluxes being measured at first. Using the experimental data, mathematical models describing membrane fouling were suggested. The obtained permeate steady-state fluxes (40 L/h/square m for amaranth starch solution, 20 L/h/square m for egg blend and 5-30 L/h/square m for caramel) depended partially on the filtration temperature (15-17 deg C for egg blend, 40 deg C for amaranth, and 50-70 deg C for caramel) but mostly on the character of the medium filtered.
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