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Open AccessArticle

Purification of Sucrose in Sugar Beet Molasses by Utilizing Ceramic Nanofiltration and Ultrafiltration Membranes

1
Department of Chemical Engineering, Faculty of Engineering, Lund University, 221 00 Lund, Sweden
2
Department of Food Technology, Engineering and Nutrition, Faculty of Engineering, Lund University, 221 00 Lund, Sweden
*
Author to whom correspondence should be addressed.
Membranes 2020, 10(1), 5; https://doi.org/10.3390/membranes10010005
Received: 14 October 2019 / Revised: 7 December 2019 / Accepted: 23 December 2019 / Published: 27 December 2019
(This article belongs to the Special Issue EWM 2019: Membranes for a Sustainable Future)
Molasses is a sugar mill by-product with low value that today is used primarily for animal feed. However, molasses contains large amounts of sucrose which, if purified, could be used for other purposes. In this study, purification by membrane filtration using ceramic tubular ultrafiltration (UF) and nanofiltration (NF) was examined. NF purifies sucrose by removing small compounds, whereas UF removes larger compounds. Based on our results, high filtration fluxes could be obtained, and it was possible to clean the membranes sufficiently from fouling compounds. Sucrose was separated from other compounds, but the separation efficiency was generally higher with diluted molasses compared with concentrated molasses. This could be explained by more severe fouling when filtering dilute molasses or potentially due to aggregate formations in the molasses as our analysis showed. Overall, this study shows the potential of ceramic UF and NF membranes for sucrose purification from molasses. View Full-Text
Keywords: molasses; sugar beet; sucrose; ceramic membrane; ultrafiltration; nanofiltration; purification; membrane fouling and cleaning molasses; sugar beet; sucrose; ceramic membrane; ultrafiltration; nanofiltration; purification; membrane fouling and cleaning
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MDPI and ACS Style

Sjölin, M.; Thuvander, J.; Wallberg, O.; Lipnizki, F. Purification of Sucrose in Sugar Beet Molasses by Utilizing Ceramic Nanofiltration and Ultrafiltration Membranes. Membranes 2020, 10, 5.

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