NaOH-free debittering of table olives using power ultrasound

Habibi, M, Golmakini, M, Farahnaky, A, Mesbahi, G and Majzoobi, M 2016, 'NaOH-free debittering of table olives using power ultrasound', Food Chemistry, vol. 192, pp. 775-781.


Document type: Journal Article
Collection: Journal Articles

Title NaOH-free debittering of table olives using power ultrasound
Author(s) Habibi, M
Golmakini, M
Farahnaky, A
Mesbahi, G
Majzoobi, M
Year 2016
Journal name Food Chemistry
Volume number 192
Start page 775
End page 781
Total pages 7
Publisher Elsevier BV
Abstract A major drawback to the extension of NaOH-free olive debittering is its lengthy processing. In this research, the power ultrasound efficacy was investigated in a laboratory scale to accelerate this process. Olive fruits were sonicated in water or brine (15% NaCl). The effects of ultrasound-assisted debittering (UAD) were evaluated on olives physicochemical and textural properties in comparison with conventional debittering (CD). In UAD, however, the removal rate of phenolic compounds, which cause olives natural bitterness, increased significantly and as a result, the processing time decreased by 37.8% and 38.6% when debittering was done in water and brine, respectively. The chemical compositions, fatty acids profile, total color differences, Firmness and other textural parameters of UAD-treated samples remained unchanged and their antioxidant activity was significantly higher in comparison with CD-treated samples. Remarkably, UAD was able to speed up and promote NaOH-free olive debittering, without causing any undesirable changes.
Subject Food Processing
Keyword(s) Olive debittering
Physicochemical properties
Textural properties
Ultrasound
DOI - identifier 10.1016/j.foodchem.2015.07.086
Copyright notice © 2015 Elsevier Ltd. All rights reserved.
ISSN 0308-8146
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