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

• Published in: Separation science and technology Vol. 53; no. 13; pp. 2126 - 2135
• Main Authors: de Araújo Padilha, Carlos Eduardo, Dantas, Paulo Victor Fortunato, Nogueira, Cleitiane da Costa, Leitão, Ana Laura de Sá, Almeida, Hanna Nóbrega, de Santana Souza, Domingos Fabiano, Oliveira, Jackson Araújo de, de Macedo, Gorete Ribeiro, dos Santos, Everaldo Silvino
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 02-09-2018; Taylor & Francis Ltd
• Subjects: Air flow; Ammonium; Ammonium compounds; Ammonium sulfate; Aqueous two-phase flotation; camu-camu; concentration; Flotation; Polyethylene glycol; Polyphenols; scale-up; Sulfates
• ISSN: 0149-6395; 1520-5754
• DOI: 10.1080/01496395.2018.1442865

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.