Improving electrodialysis separation efficiency of minerals from acid whey by nano-filtration pre-processing
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Acid whey (AW) contains valuable minerals, such as calcium and magnesium. Electrodialysis (ED) is an efficient technology to recover these minerals; however, the less nutritional sodium will also be recovered during ED. AW was processed by nanofiltration prior to ED in order to change the ratio between the monovalent and divalent ions. The nano-filtration increased the efficiency of the ED process regarding recovery of Ca2+ and Mg2+ ions by 70% and 67%, respectively, while it did not affect the K+, Na+, phosphates and lactate. The spent energy was more effectively used to recover Ca2+ in the nano-filtrated AW.
Original language | English |
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Journal | International Journal of Dairy Technology |
Volume | 75 |
Issue number | 4 |
Pages (from-to) | 820-830 |
Number of pages | 11 |
ISSN | 1364-727X |
DOIs | |
Publication status | Published - 2022 |
Bibliographical note
Funding Information:
The authors would like to acknowledge the Platform for Novel Gentle Processing supported by the Dairy Rationalisation Fund (DDRF), Copenhagen University and Arla Foods for funding this study.
Publisher Copyright:
© 2022 The Authors. International Journal of Dairy Technology published by John Wiley & Sons Ltd on behalf of Society of Dairy Technology.
- Acid whey, Calcium, Electrodialysis, Lactic acid, Minerals, Nanofiltration
Research areas
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