Purification of phenolic compounds from genipap (<i>Genipa americana</i> L.) extract by the ultrasound assisted ultrafiltration process

Abstract

The aim of this study was to evaluate the potential of an integrated membrane process for purification of polyphenol and genipin components from genipap fruit extract. Optimal conditions for aqueous extraction of polyphenols from genipap fruit pulp were at 71°C for 49 min using a fruit pulp:water ratio of 1:3 (w w -1 ). Microfiltration with membranes of different pore sizes (0.22, 0.3 and 0.8 μm) resulted in a clarified permeate with similar physical-chemical properties, but the permeate flux through the 0.8 μm membrane was higher than through the other membranes. The sequential ultrafiltration process reduced even more total and soluble solids of the microfiltered extract. Purities of polyphenols and genipin were, respectively, 2.5 and 1.2 times greater in the permeate than in the feed stream. Application of ultrasound during the ultrafiltration increased the steady state permeate flux and the purities of polyphenols and genipin in the permeate stream. Results suggest application of microfiltration as a clarification step followed by the ultrasound assisted ultrafiltration to produce a purified genipap extract with high contents of polyphenols and genipin.

Performance of asymmetric spinel hollow fiber membranes for hibiscus (Hibiscus sabdariffaL.) extract clarification: Flux modeling and extract stability

“…Madrona et al. (2018) showed that the clarification of genipap extract through a 0.8 µm cellulose ester microfiltration membrane reduced TS and TSS contents of feed extract in 19.70% and 33.80%, respectively. The sequential process of centrifugation and membrane filtration was more effective than the single processes in clarifying the hibiscus extract, with a reduction of TS and TSS of 19.82 and 27.12%, respectively (Table 1).…”

“…Madrona et al. (2018) reported a permeate flux of genipap fruit extract through a flat polymeric membrane of 0.22 µm of 9.50 kg/m 2 hr –1 . Terra et al.…”

“…Madrona et al. (2018) evaluated the microfiltration of genipap extract through cellulose ester membranes (0.8, 0.3 and 0.22 µm) at 1 bar of transmembrane pressure and reported that the major fouling mechanism was cake formation. Balyan et al.…”

“…Table 1 presents the physicochemical characteristics of feed and permeate hibiscus extracts in terms of pH, total soluble solids (TSS), total solids (TS), total phenolic compounds (TPC), total anthocyanins (Table 1). Madrona et al (2018) showed that the clarification of genipap extract through a 0.8 µm cellulose ester microfiltration membrane reduced TS and TSS contents of feed extract in 19.70% and 33.80%, respectively. The sequential process of centrifugation and membrane filtration was more effective than the single processes in clarifying the hibiscus extract, with a reduction of TS and TSS of 19.82 and 27.12%, respectively (Table 1).…”

The effect of ultrasound treatment on the efficiency of membrane clarification of carrot juice

“…Madrona et al. (2019) used the ultrasound‐assisted ultrafiltration to purification of phenolic compounds from genipap extract. They concluded that application of ultrasound can increase the purity of permeate stream during ultrafiltration of genipap extract.…”