Whey is an important by-product of milk
technology. The byproduct of cheese-producing industries, cheese whey, is
considered as an environmental pollutant due to its high biological oxygen
demand (BOD) and chemical oxygen demand (COD) values. High organic load of whey
arises from the presence of residual milk nutrients. As demand for milk-derived
products is increasing, it leads to the increased production of whey, which has
a serious waste management problem. To overcome this problem, various
technological approaches have been employed to convert cheese whey into
value-added products. Using membrane technology to whey processing, it has become
possible to demineralize, concentrate, and fractionate cheese whey in an
efficient way and thus convert the waste by-product into highly valuable
products. In this study, the potential of an integrated membrane process based
on ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) was
investigated for fractionation of cheese whey components. Experimental studies
were performed using a laboratory scale membrane test system (SEPA CF II
GE-Osmonics). The pH, temperature, salinity, conductivity, and total dissolved
solids (TDS) of the concentrate and permeate samples were measured by Hach
Lange-HQD multi-meter. Protein contents of samples were determined by
Kjeldahl-N measurement and the lactose concentration with HPLC method. According
to the results, when the permeate of the UF membrane was passed through the
NF-90 membrane, the conductivity, total dissolved solids (TDS) and salinity
removal reached up to 90%, while the NF-270 membrane was removed at 40%. In the
integrated UF-NF-90 and UF-NF-270 studies, the enrichment rate of protein was
26-28%, protein rejections were 69-74%, respectively, while the enrichment rate
of lactose was 28% and 11%, lactose rejections were 99% and 97% respectively.
Lastly, when the NF-270 concentrate composition was treated with the BW30-RO
membrane, the enrichment rate of lactose reached up to 19-20% from 11% and
lactose rejection was reached up to 99%. This showed that integrated membrane
processes are more effective than a single membrane process in separating the
fractions of whey.
Primary Language | Turkish |
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Journal Section | Research Papers |
Authors | |
Publication Date | December 31, 2018 |
Submission Date | May 20, 2017 |
Published in Issue | Year 2018 Volume: 16 Issue: 4 |
Bu eser Creative Commons Atıf-GayriTicari 4.0 (CC BY-NC 4.0) Uluslararası Lisansı ile lisanslanmıştır.
Akademik Gıda (Academic Food Journal) is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0).