Effect of microfiltration on bioactive components and antioxidant activity of açaí (Euterpe oleracea Mart.)

Microfiltration of centrif uged acai pulp was performed using two types of membrane (ceramic and polymeric), each one at two temperatures (25 and 35 degree C), aiming to evaluate the influence of these parameters on its chemical composition and antioxidant activity. Temperature and membrane material...

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Bibliographic Details
Published in:Desalination and water treatment 2011-03, Vol.27 (1-3), p.97-102
Main Authors: GIL CRUZ, Ana Paula, DE ANDRADE MATTIETTO, Rafaella, DIB TAXI, Cristina Maria Araujo, CORREA CABRAL, Lourdes Maria, MARINO DONANGELO, Carmen, MARTINS DA MATTE, Virginia
Format: Article
Language:English
Subjects:
Anthocyanins
Antioxidants
Applied sciences
Ceramics
Euterpe oleracea
Exact sciences and technology
Flux
Fruits
Membranes
Microfiltration
Pollution
Water treatment
Water treatment and pollution
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Summary:Microfiltration of centrif uged acai pulp was performed using two types of membrane (ceramic and polymeric), each one at two temperatures (25 and 35 degree C), aiming to evaluate the influence of these parameters on its chemical composition and antioxidant activity. Temperature and membrane material did not significantly influence the bioactive components contents and the antioxidant activity of the two obtained fractions. However, permeate flux was strongly dependent on both factors, reaching the highest mean value (117 l/h m super(2)) with the ceramic membrane at 35 degree C. Clarified juice, the permeate fraction, contained about 16 mg/100 g of anthocyanins, 138 mg/100 g of total phenolics and 9 mu mol Trolox/g of antioxidant activity. The retained fraction, with characteristics similar to the original acai fruit, presented 75 mg/100 g of anthocyanins, 433 mg/100 g of total phenolics and 31 mu mol Trolox/g of antioxidant activity. Therefore, microfiltration of acai resulted in two fractions with distinct characteristics, both rich in bioactive components and with potential industrial application.
ISSN:1944-3994
1944-3986
DOI:10.5004/dwt.2011.2064