Diseño y construcción de un prototipo de reactor UV-C mediante manufactura aditiva para la esterilización de leche

Abstract

Research concerning milk sterilization by means of UV-C radiation and its application in reactors is lacking in terms of studies, mathematical models and design proposals that adjust to the particularities of milk. In addition, there are challenges in relation to the economic aspects and the conservation of nutrients in other sterilization techniques. For this reason, the main purpose of this study was the design and construction of a prototype UV-C reactor using additive manufacturing techniques, in order to carry out the sterilization of milk. The methodology executed started from the 3D design in Fusion 360, meticulously considering each parameter necessary to create an appropriate structure that would guarantee the effective sterility of the milk. An approach of a mixed nature was adopted, derived from the integration of quantitative and qualitative aspects. On the one hand, quantification was considered through the analysis of E. coli counts, as well as the exploration and analysis of statistical variables. On the other hand, the qualitative dimension was incorporated, which was manifested through the sensory evaluation carried out at the end of the milk sterilization process. The result of the application of this methodology showed that the total elimination of Escherichia Coli was achieved under flow conditions of 0.05 ml/s and a radiation dose of 3.9x104 J/m2 with a thickness of 1.1 mm. It is important to note that the milk subjected to this treatment maintained the quality standards stipulated by current regulations (INEN 10:2012). In conclusion, the accurate determination of design parameters, the adaptability of 3D printing, validation through statistical analysis and confirmation of regulatory compliance enriched this comprehensive approach, this study represents a significant achievement that opens new possibilities to address food safety challenges.