Concentration of acerola (Malpighia emarginata DC.) juice by integrated membrane separation process

Acerola is a tropical fruit with a high antioxidant activity which may be attributed to its high vitamin C and anthocyanins content. The aim of this work was to produce a high quality concentrated acerola juice by an integrated membrane process, alternative to thermal evaporation. Acerola juice was...

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Bibliographic Details
Published in:Desalination and water treatment 2011-03, Vol.27 (1-3), p.130-134
Main Authors: Pagani, Mônica M., Rocha-Leão, Maria Helena, Barbosa Couto, Aline Bravo, Pinto, Juliana P., Ribeiro, Alan O., dos Santos Gomes, Flávia, Cabral, Lourdes M.C.
Format: Article
Language:English
Subjects:
Anthocyanins
Antioxidant activity
Antioxidants
Applied sciences
Ascorbic acid
Berries
Evaporation
Exact sciences and technology
Folds
Fruits
Instability
Juices
Malpighia emarginata
Membrane processes
Membranes
Microfiltration
Osmotic evaporation
Pollution
Reverse osmosis
Separation processes
Stability
Tropical climate
Tropical fruit
Vitamin C
Vitamins
Water treatment and pollution
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Summary:Acerola is a tropical fruit with a high antioxidant activity which may be attributed to its high vitamin C and anthocyanins content. The aim of this work was to produce a high quality concentrated acerola juice by an integrated membrane process, alternative to thermal evaporation. Acerola juice was clarifi ed by the microfiltration process. The clarifi ed juice was preconcentrated by reverse osmosis process up to a total soluble solid content (TSS) of 28° Brix and after that the osmotic evaporation process (OE) was used to reach a TSS up to 55° Brix, corresponding to a concentration factor of 1.93. The vitamin C, anthocyanins content and antioxidant activity increased, respectively, 2.21, 1.41 and 2.28 folds in relation to the pre-concentrated juice when the OE was performed. The results showed that there was no change on the vitamin C content and antioxidant activity of the juice after its processing. However, it was verified a reduction on the anthocyanins content, probably due to the great instability on this pigment. The obtained results showed that the integrated membrane process may be used as an alternative to obtain high quality concentrated juice, as the final product still showed a very high antioxidant activity and a very high amount of vitamin C.
ISSN:1944-3986
1944-3994
1944-3986
DOI:10.5004/dwt.2011.2076