The utility of Life Cycle Assessment in the ready meal food industry

Lifestyle and consumer habits increasingly demand ready meals with high quality standards. A ready meal is a packaged food product already prepared for eating with minimum handling. Generally, ready meals only require heating or hydration, and can even consist of a complete prepared dish including all the ingredients, such as a stew. The ready meals industry uses raw materials with high environmental loads, needs energy and water and generates solid and liquid waste that must be properly managed. The environmental performance of the food industry is an issue of great importance for consumers, companies and administrative authorities responsible for environmental policies. This work demonstrates the utility of using the Life Cycle Assessment (LCA) approach to identify more sustainable options in the ready meals food sector.The complete production process for a canned ready meal, a stew product based on cooked pulses and pork meat cuts (sausages and ham), has been analyzed in a real factory using an LCA approach through its entire life cycle, with a cradle to grave perspective. Two different methodologies were applied for the impact assessment step in LCA: a problem-oriented method (midpoints) and a damage-oriented method (endpoints). The subsystems showing the highest environmental loads turned out to be food ingredients and solid waste management. The impact categories most affected by the production cycle of the ready meal were land use, fossil fuel consumption and water ecotoxicity. An impact analysis of different packaging systems for the specific product, applicable to packaging selection, was performed, considering five alternative scenarios to tinplate cans. The selection of biopolymer packaging systems as an alternative end-of-life scenario could help to reduce the environmental impacts of the ready meal product under study.