Abstract
To establish a method of determining the operation conditions for pickle production, a model of water and NaCl transfer were examined. In the experiments, a turnip was immersed in NaCl solutions of different concentrations (pickling solutions), and water and NaCl transfer phenomena during immersion were examined. The larger the difference in NaCl concentration between the turnip and the pickling solution, the rate of water and NaCl transfer were higher. When the difference in NaCl concentration between the turnip and pickling solution became nearly zero, there is a possibility that the transfer of water and NaCl transfer stopped. From the above result, the difference in NaCl concentration between the turnip and the pickling solution was considered to be the dominant promoter of water and NaCl transfer. We formulated an equation of material transfer during water and NaCl transfer using the NaCl concentrations of the pickled sample and pickling solution as driving force. As a result, the rate coefficient of this equation was almost constant. When the change of the NaCl concentrations in the turnip was estimated by using our model, the estimated values well agreed with the measured values.
