Journal of Arid Land Studies
Online ISSN : 2189-1761
Print ISSN : 0917-6985
ISSN-L : 0917-6985
Session II: Economic benefits of arid lands use: Biological resources assessment and trade-off analysis, Supporting of social initiatives
Integrated Membrane Process for the Recovery of Polyphenols from Olive Mill Water
Ilyes DAMMAKMitsutoshi NAKAJIMASami SAYADIHiroko ISODA
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2015 Volume 25 Issue 3 Pages 85-88

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Abstract
Olives are known to contain an appreciable amount of polyphenols with good antioxidant properties, which are abundantly occurred in olive mill water (OMW) during olive oil production. Membrane technology offers several advantages (low energy consumption, no additive requirements and no phase change) compared to traditional techniques to recover polyphenols from OMW. In the present study, we have proposed to analyse the potentialities of an integrated membrane process for the recovery and concentration of polyphenols from OMW. The proposed process included three membrane operations: microfiltration (MF), ultrafiltration (UF) and nanofiltration (NF). After preliminary centrifugation of OMW which resulted in the reduction of 45% of total dissolved solid, the supernatant was subjected to a MF operation. This step allowed achieving 8% reduction of total dissolved solid. Moreover, most polyphenols were recovered in the produced permeate solution. The MF permeate stream was then submitted to a UF treatment. Most polyphenols initially present in OMW were recovered in the permeate stream using the discontinuous diafiltration mode, with 70% reduction on total dissolved solid. A concentrated solution enriched of polyphenols was obtained by treating the UF permeate using NF operation. In particular, the proposed integrated system allows the recovery of 86% of total polyphenols in the NF retentate, with hydroxytyrosol and oleuropein representing nearly 50% of the total polyphenols.
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© 2015 The Japanese Association for Arid Land Studies
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