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Published on: August 23, 2019
Fermentation in nutrient salt mixtures affects green Spanish-style Manzanilla table olive characteristics
Antonio López-López1, Joaquín Bautista-Gallego1, José María Moreno-Baquero1
1Department of Food Biotechnology, Instituto de la Grasa (CSIC), Campus Universitario Pablo de Olavide, Building 46, 41013 Sevilla, Spain.
Abstract:
This work studies the effects of the substitution of NaCl with KCl and CaCl2 on the physicochemical, mineral and sensory profile of fermented green Spanish-style Manzanilla olives, using an enlarged centroid mixture design. An increasing presence of CaCl2 in the initial brines improved the colour index, L(∗), b(∗) values, and firmness. The Na in the olives decreased (linearly) while the levels of K and Ca increased (quadratic) as a function of the KCl and CaCl2 concentrations in the initial brines. CaCl2 also improved the retention of Zn and P in the flesh. PLS showed a strong relationship between Ca and bitterness, hardness, fibrousness, crunchiness and saltiness (negative) and allowed for the prediction of sensory attributes (except acid) from the mineral contents in the flesh. Most of the treatments could lead to new green Spanish-style Manzanilla olive presentations with reduced Na and healthier characteristics.
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