Industrial Validation of the Pasteurization Process for Frankfurter-Type Sausages in Small-Caliber Collagen Casings

This study presents the industrial validation of the pasteurization process for finely minced cooked sausages (Frankfurter-type sausages) in small-caliber edible collagen casings, addressing the stringent “zero-tolerance” mandate for Listeria monocytogenes under European Union (EU) Regulation 2024/2895. Real-time thermal-processing evaluation across three industrial chambers using high-resolution temperature monitoring demonstrated that achieving a 74 °C core temperature over a 96 min cycle yielded cumulative pasteurization values of 35.56–50.76 min, inducing a 10.78 to 15.4 log10 reduction in L. monocytogenes. These findings exceed the standard target typically established for vegetative-pathogen reduction, validating this study-derived operational-process threshold by establishing a compliant safety buffer against elevated initial bioburdens, even under documented worst-case industrial field constraints. Ultimately, while rigorous scientific validation of thermal-process parameters provides a robust preventive framework, verifying full compliance with the end-product microbiological standards of Regulation (EC) No 2073/2005 remains fundamentally dependent on routine end-product testing combined with strict maintenance of the cold chain (0–4 °C).