Enhancing the recovery and concentration of polyphenols from camu-camu (Myrciaria dubia H.B.K. McVaugh) by aqueous two-phase flotation and scale-up process |
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Authors: | Carlos Eduardo de Araújo Padilha Paulo Victor Fortunato Dantas Cleitiane da Costa Nogueira Ana Laura de Sá Leitão Hanna Nóbrega Almeida Domingos Fabiano de Santana Souza |
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Affiliation: | Laboratory of Biochemical Engineering, Chemical Engineering Department, Federal University of Rio Grande do Norte (UFRN), Natal, RN, Brazil |
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Abstract: | In this study, polyphenols obtained from camu-camu pulp residue were recovered and concentrated from aqueous two-phase flotation (ATPF) by evaluating different operating conditions, such as solvent type, pH, ammonium sulfate concentration, flotation time, air flow, and volumetric ratio. Under optimal conditions, the polyethylene glycol 400/ammonium sulfate ATPF system showed an efficiency of 81.02% and a concentration coefficient two times higher than traditional aqueous two-phase extraction. Experiments were also carried out on a semi-pilot scale, using an apparatus with a 2.5-L working volume. The results showed that the semi-pilot system was comparable to the smaller scale system. |
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Keywords: | Aqueous two-phase flotation camu-camu concentration polyphenols polyethylene glycol scale-up |
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