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Spouted pouches are being increasingly used in the beverage sector. However, aseptic packaging technology used for spouted pouches requires a highly complex sterilisation and rinsing process for the packaging materials before filling. This paper deals with the pouch packaging sterilisation process used in aseptic technology. A mixture composed of vaporised hydrogen peroxide and hot sterile air is injected into the package through a sterilisation nozzle. A CFD multicomponent model in ANSYS CFX (version 14.5) has been created and validated in order to simulate the real process. Based on this model, the paper aims to minimise hydrogen peroxide consumption and optimise the sterilisation treatment of the packaging. This issue has been approached using multi-objective optimisation software applied to CFD multicomponent simulations. The most suitable nozzle position inside the pouch has been established, as well as the optimal treatment time, concentration and flow rate of the sterilising mixture.

Modelling and Multi-objective Optimisation of the VHP Pouch Packaging Sterilisation Process