Partial demineralization and concentration of acid whey by nanofiltration combined with diafiltration

András, Román and Juanming, Wang and Csanádi, József and Hodúr, Cecilia and Vatai, Gyula (2009) Partial demineralization and concentration of acid whey by nanofiltration combined with diafiltration. DESALINATION, 241 (1-3). pp. 288-295. ISSN 0011-9164

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In this paper, nanofiltration (NF) combined with continuous variable volume diafiltration (CVVD) of cottage cheese whey (also known as acid whey) was investigated to simultaneously concentrate and partially demineralize it. The experiments were carried out in a laboratory NF equipment using a flat sheet membrane with the effective area of 0.046m2 and 96% sucrose rejection. Fat, protein, lactose and total solid content of the samples were analyzed by Infrared Milk Analyzer Bently 150. Ion composition of the samples was determined by ICP-MS instrument. The concentrations were carried out at different values of the ratio of the volume of dialyzation water and the volume of permeate (a). The degree of demineralization of monovalent ions reached 70% and 90% at 2.5 volume concentration ratio, and at diafiltration and permeate volume ratios of 0.5 and 0.75, respectively. The amount of multivalent ions increased continuously during the NF combined with CVVD of acid whey. The rejection of the valuable compounds of whey such as protein and lactose was over 90%.

Item Type: Article
Additional Information: Third Membrane Science and Technology Conference of Visegrad Countries (PERMEA). Siófok, 2–6 September 2007.
Subjects: S Agriculture / mezőgazdaság > SF Animal culture / állattenyésztés
Depositing User: MTMT SWORD
Date Deposited: 14 Mar 2014 09:21
Last Modified: 14 Mar 2014 09:21

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