Journal
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
Volume 37, Issue -, Pages 153-160Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ifset.2016.08.001
Keywords
Lycopene; Microfiltration; Carotenoids; Diafiltration; cis-Isomerization; Centrifugation
Categories
Funding
- Centre for International Cooperation in Agronomic Research for Development (CIRAD)
- University Lisandro Alvarado (UCLA-Venezuela)
- University Central of Venezuela (UCV-Venezuela)
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The concentration of thermosensitive bioactive compounds remains an important challenge. A gentle integrated process including enzymatic maceration, crossflow microfiltration, diafiltration and centrifugation was applied to watermelon juice to obtain a natural extract enriched with lycopene. Microfiltration was performed using ceramic membranes with different pore diameters (0.2 to 1.4 mu m), transmembrane pressures (50 to 200 kPa) and temperatures (50 degrees C and 60 degrees C). Using the best operating conditions during microfiltration, the permeate flux was close to 110 L center dot h(-1)center dot m(-2), and the lycopene concentration increased 11-fold in the retentate. Diafiltration allowed for the purification of lycopene up to 25-fold. Centrifugation enhanced the lycopene concentration up to 4-fold. cis-lsomerization remained low and similar to that of raw juice. This integrated process obtained a natural extract of lycopene that was 41 times more concentrated and 34 times purer than the initial juice, yielding an extract with up to 2% all-trans-lycopene on a dry basis. (C) 2016 Elsevier Ltd. All rights reserved.
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