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Correlation using multivariate analysis and control of drying and storage conditions of sunflower grains on the quality of the extracted vegetable oil
Author(s) -
Coradi Paulo Carteri,
Dubal Ítala Thaísa Padilha,
Bilhalva Nairiane dos Santos,
Fontoura Camila Nunes,
Teodoro Paulo Eduardo
Publication year - 2020
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/jfpp.14961
Subject(s) - relative humidity , sunflower , yield (engineering) , sunflower oil , environmental science , extraction (chemistry) , pulp and paper industry , materials science , food science , chemistry , mathematics , composite material , chromatography , meteorology , physics , combinatorics , engineering
The kinetics and mathematical modeling of sunflower drying subjected to different storage conditions to obtain yield and quality of the extracted oil were investigated. The sunflowers grains were submitted to drying at 45, 55, 65, and 75°C, after the grains were stored at natural environment (25°C and 50%) and two climate chambers (20°C and 60%, and 30°C and 40% relative humidity [RH] air) for two types of packaging (paper and raffia bag) during 6 months. The increase in the drying temperature caused variations in the effective diffusivity and in the isosteric heat desorption, interfering in the physical properties of the grains and reducing the yield and quality of the extracted oil. Sunflower grains stored in raffia packages under controlled conditions of 20°C and 60% RH ensure the quality of sunflower grains and higher oil yield; however, 30°C and 40% RH had lower oil acid. Novelty Impact Statement The vegetable oil extraction industry needs to monitor and control the preprocessing operations for sunflower grains, mainly in the drying and storage stages. The application of high temperatures in the drying air associated with inadequate temperatures and air relative humidity in the storage environments interfere in the quality of the sunflower grains and, consequently, in the yield and quality of the extracted oil.