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Open AccessArticle

A Contribution for the Valorisation of Sheep and Goat Cheese Whey through Nanofiltration

1
Escola Superior Agrária, Polytechnic Institute of Beja, Rua Pedro Soares, Ap. 6158, 7801-908 Beja, Portugal
2
LEAF—Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, University of Lisbon, Tapada da Ajuda, 1349-017 Lisboa, Portugal
3
Instituto Superior de Agronomia, University of Lisbon, Tapada da Ajuda, 1349-017 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Membranes 2018, 8(4), 114; https://doi.org/10.3390/membranes8040114
Received: 1 August 2018 / Revised: 27 August 2018 / Accepted: 14 October 2018 / Published: 20 November 2018
(This article belongs to the Special Issue Fouling in Liquid Separation Membrane Technologies)
The amount of cheese whey generated from the production of speciality sheep and goat cheese is significantly growing due to the acclaimed nutritional and medicinal benefits of the milk from these species. However, most of the cheese whey generated has no applications, thus giving rise to environmental problems. This work focuses on the study of the performance of the nanofiltration process for recovering the permeates of ultrafiltration from sheep and goat cheese whey. Nanofiltration experiments were carried out with membranes of nanofiltration (NF) in total recirculation and concentration modes, at 25 °C. Nanofiltration of the ultrafiltration permeates from sheep cheese whey was done at a pressure of 3.0 × 106 Pa and a circulation velocity of 1.42 m·s−1, until a volume concentration factor (VCF) of 2.5. Nanofiltration of the permeates from ultrafiltration of goat cheese whey was performed at a pressure of 2.0 × 106 Pa and a circulation velocity of 0.94 m·s−1, until a VCF of 2.0. From the results, it was concluded that osmotic pressure was the most important factor affecting the performance of the process. In both cases, the final permeates had a much lower organic load and its future use in the process of cheese making should be evaluated. View Full-Text
Keywords: sheep cheese whey; goat cheese whey; ultrafiltration permeates; nanofiltration performance sheep cheese whey; goat cheese whey; ultrafiltration permeates; nanofiltration performance
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Macedo, A.; Monteiro, J.; Duarte, E. A Contribution for the Valorisation of Sheep and Goat Cheese Whey through Nanofiltration. Membranes 2018, 8, 114.

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