ATPS formed by PEG (molecular weights: 200–8000 g.mol⁻¹) with sodium or ammonium sulfate were investigated. In this work, Aqueous Two-Phase Systems (ATPS) were studied for the recovery of lactose, BSA, β-lactoglobulin and α-lactalbumin, key components of cheese whey. Two configurations of EDBM were compared in terms of fouling on the BM surface, electrodialysis capacity, and energy consumption.Ĭheese whey is an environmental problem as an effluent, but also a source of valuable raw materials, namely proteins and lactose. With increasing the demineralization rate of the whey in ED the diffusional transport of species in EDBM reduces due to the decrease in ion content of the whey. The cations were mainly transported by diffusion in developed configurations of EDBM while anions were transported either with diffusion or migration depending on the type of milk whey sample. The mechanisms of ion transport during EDBM for either cations or anions were investigated. It was figured out that the increase in pH was not accompanied by any significant increase in total solids and ash content of the samples. The changes in pH, total solids, ash content, and minerals profile of various samples after EDBM were investigated. However, the pH of NFW sample only increased to the values less than 6. When the samples which had been demineralized first with conventional ED, were submitted in EDBM the pH increased to the desired values. Two configurations of EDBM were applied to increase the pH of the milk whey samples. Three milk whey samples differing in demineralization rate in ED were subjected to the EDBM. First, ED was used to desalinate the nanofiltrated whey (NFW). In this work, electrodialysis with the bipolar membrane (EDBM) was examined to neutralize the desalinated whey after ED. However, the addition of these solutions results in an increase in total solids and ash content of the whey sample.
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