The objective of this work was to evaluate the technical feasibility of coupling two membrane separation
processes, reverse osmosis (RO) and osmotic evaporation (OE), in order to concentrate clarified
camu–camu juice, focusing on the vitamin C, phenolic compounds and antioxidant activity of the final
product. The juice was firstly pre-concentrated by RO, reaching 285 g kg1 of soluble solids. During this
step, the juice’s osmotic pressure showed to be the main factor controlling mass transfer. The juice was
then concentrated by OE, reaching 530 g kg1 of soluble solids. Vitamin C, total phenolics and antioxidant
activity levels of 94.6 g ascorbic acid kg1, 105.2 g galic acid kg1 and 762 mmol Trolox kg1, respectively,
were achieved in the final product. The use of integrated membrane processes proved to be an interesting
alternative to the concentration of thermosensitive juices, reaching concentration levels up to 7 times for
camu–camu juice’s bioactive compounds
The objective of this work was to evaluate the technical feasibility of coupling two membrane separation
processes, reverse osmosis (RO) and osmotic evaporation (OE), in order to concentrate clarified
camu–camu juice, focusing on the vitamin C, phenolic compounds and antioxidant activity of the final
product. The juice was firstly pre-concentrated by RO, reaching 285 g kg1 of soluble solids. During this
step, the juice’s osmotic pressure showed to be the main factor controlling mass transfer. The juice was
then concentrated by OE, reaching 530 g kg1 of soluble solids. Vitamin C, total phenolics and antioxidant
activity levels of 94.6 g ascorbic acid kg1, 105.2 g galic acid kg1 and 762 mmol Trolox kg1, respectively,
were achieved in the final product. The use of integrated membrane processes proved to be an interesting
alternative to the concentration of thermosensitive juices, reaching concentration levels up to 7 times for
camu–camu juice’s bioactive compounds
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