Effect of fermentation and dry roasting on the nutritional quality and sensory attributes of quinoa
Journal article, 2019

BackgroundQuinoa is a pseudocereal with relatively high content of proteins and minerals that also contains mineral inhibitors such as phytate. The aim of the present study was to evaluate lactic acid fermentation and dry roasting on the nutritional quality and sensory attributes of quinoa. Various processes were evaluated, and quinoa grains were dry-roasted, milled, and fermented, either with or without the addition of wheat phytase or activated quinoa phytase (added as back-slop starter), for 10 hr. In other processes, raw quinoa flour was fermented for 10 hr or 4 hr and dry-roasted. Hedonic sensory evaluation was then performed to evaluate the acceptability of the fermented flours prepared as porridges. ResultsThe combined dry roasting and fermentation processes significantly (p < .05) degraded phytate between 30% and 73% from initial content. The most effective process was fermentation of raw quinoa flour followed by dry roasting, which improved the estimated zinc and iron bioavailability. Particularly, estimated zinc bioavailability improved from low (Phy:Zn 25.4, PhyZn:Ca 295) to moderate (Phy:Zn 7.14, PhyZn:Ca 81.5). Phytate degradation was mainly attributed to the activation of endogenous phytase during fermentation. Dry roasting was effective in improving the sensory attributes of the fermented quinoa flour. Porridge made with raw quinoa flour fermented for 4 hr and dry-roasted was more favorable to overall acceptability than that which was fermented for 10 hr and dry-roasted. ConclusionFermentation of quinoa flour for 4 hr followed by dry roasting was successful in improving both nutritional and sensory attributes of the final product.

sensory attributes

fermentation

phytate degradation

quinoa

dry roasting

minerals

Author

Vanesa Castro-Alba

University of San Simón

Lund University

Claudia Eliana Lazarte

Lund University

Daysi Perez-Rea

University of San Simón

Ann-Sofie Sandberg

Chalmers, Biology and Biological Engineering, Food and Nutrition Science

Nils-Gunnar Carlsson

Chalmers, Biology and Biological Engineering, Food and Nutrition Science

Annette Almgren

Chalmers, Biology and Biological Engineering, Food and Nutrition Science

Bjorn Bergenstahl

Lund University

Yvonne Granfeldt

Lund University

Food Science and Nutrition

2048-7177 (eISSN)

Vol. 7 12 3902-3911

Subject Categories

Food Science

Chemical Process Engineering

Bioprocess Technology

Areas of Advance

Life Science Engineering (2010-2018)

DOI

10.1002/fsn3.1247

More information

Latest update

9/15/2020