Procesamiento de Arvejas (Pisum sativum L.). Parte 3: Cinética de Pérdida de Agua en Chips de Arveja en Condiciones de Fritura Convencional y a Vacío

Abstract

The kinetics of water loss from chips peas (Pisum sativum L.) of Andina Obonuco variety in different frying conditions at atmospheric pressure and vacuum was determined. Three pressures were considered (78, 43 and 9 kPa) associated at three temperatures (140, 160 and 180 °C), and a seed/oil ratio 1: 8 (w/v) was used taking measurements between 0 and 240 seconds. The effects of pressure and temperature were evaluated by the diffusion coefficient (Deff) and the activation energy (Ea), while the kinetics of water loss was studied with three models (Newton, Henderson-Pabis and Page). The dependence of diffusivity on temperature and pressure was determined. The Arrhenius equation gave values for the activation energy Ea of 18.67, 13.82 and 13.75 kJ/mol at 78, 43 and 9 kPa respectively. The models analyzed in this work adequately describe the kinetics of water loss.