Model of gas exchange dynamics for modified-atmosphere packages containing fresh produce

摘要

A model for modified-atmosphere packaging (MAP) systems containing fruits and vegetables was developed. The computer simulation was performed to predict the gas mass concentrations inside the packages and was successfully verified by experiments with yellow peaches at 5, 15 and 25 deg C using two types of packaging films. A Michaelis-Menten type respiration model with noncompetitive inhibition mechanism due to CO_2 was adopted while the respiration rates were measured with an improved permeable system method suitable for either steady or unsteady state. The applicability of the model in the design of MAP systems was demonstrated with a calculation to evaluate film specification and equilibrium concentrations of O_2 and CO_2 in the package containing yellow peaches.