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Study Of The Rehydration Kinetics Of Nixtamalized Corn By Using Two Nixtamalization Methods

Published in: Prospective and trends in technology and skills for sustainable social development. Leveraging emerging technologies to construct the future: Proceedings of the 19th LACCEI International Multi-Conference for Engineering, Education and Technology
Date of Conference: July 19-23, 2021
Location of Conference: Virtual
Authors: Jesús Sánchez-González (Departamento de Ciencias Agroindustriales, Universidad Nacional de Trujillo, PE)
Meliza Lindsay Rojas (Dirección de Investigación y Desarrollo, Universidad Privada del Norte, PE)
Guillermo Linares (Departamento de Ciencias Agroindustriales, Universidad Nacional de Trujillo, PE)
Leslie Lescano (Departamento de Ciencias Agroindustriales, Universidad Nacional de Trujillo, PE)
Alexander Vega Anticona (Departamento de Ingeniería de Materiales, Universidad Nacional de Trujillo, PE)
Danny Chávez Novoa (Departamento de Ingeniería de Materiales, Universidad Nacional de Trujillo, PE)
Full Paper: #45

Abstract:

The present study aimed to study the rehydration kinetics of previously nixtamalized and dried corn. Nixtamalization was carried out using two methods: using wood ash (classical method) and using calcium hydroxide (Ca(OH)2) (traditional method), after samples were sun-dried. The rehydration kinetics was described using six mathematical models (Fick, Peleg, Weibull, Page, Ibarz et al. and first-order model) in which the possible interpretation of its parameters and the goodness of fit was evaluated. As results, it was obtained that the treatment with ash obtained better rehydration properties, kinetic parameters value of the used models showed that the rehydration in this treatment was the fastest. In addition, this treatment also reached a high moisture content (49.22 ± 2.10%) compared to other treatments (Control and Ca(OH)2). The evaluation of the models fit suggests that the first-order model is not adequate to describe the rehydration in any treatment here evaluated, while Fick is suitable to describe the rehydration of Control samples (without treatment), and the experimental models such as Page, Peleg or Weibull are suitable for describing rehydration in samples processed by nixtamalization, especially with ash.