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Using ultrasound for improving hydration and debittering of Andean lupin grains
Author(s) -
Miano Alberto C.,
Rojas Meliza L.,
Augusto Pedro E. D.
Publication year - 2019
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/jfpe.13170
Subject(s) - ultrasound , extraction (chemistry) , chemistry , alkaloid , kinetics , lupinus , process (computing) , moisture , chromatography , materials science , botany , organic chemistry , biology , physics , quantum mechanics , computer science , acoustics , operating system
This article presents results about the potential use of ultrasound technology on the hydration and debittering process of Andean lupin grains ( Lupinus albus Sweet). The hydration process was conducted conventionally and also assisted by ultrasound technology (ultrasonic water bath, 25 kHz, 41 W/L). Further than the hydration kinetics, the alkaloid content was evaluated. As results, the hydration kinetics of this grain showed a sigmoidal behavior, which was accelerated almost 40% using ultrasound. The lag phase was reduced about 13%, and the equilibrium moisture content was increased about 14%. Finally, by using ultrasound during hydration process, the alkaloid extraction was also improved, extracting 21% more compared to the conventional process. It was concluded that ultrasound technology accelerates not only the hydration process but also the extraction of alkaloids. Practical Applications Andean lupin is a pulse with potential importance for human and animal alimentation due to its high quantity of proteins. However, this pulse has a considerable quantity of undesirable alkaloids that are bitter and toxic. Therefore, a debittering process is required. Further, before debittering, hydration of the grains is required, which is a long and batch process. This work demonstrated that both the hydration and the debittering processes can be enhanced by ultrasound. Consequently, ultrasound technology would have a double application during hydration process of Andean lupin grains.