Automação de um pasteurizador de leite como aplicação da indústria 4.0: um sistema de controle e monitoramento web

Abstract

Industry 4.0 has marked a significant evolution for companies, but not all sec- tors have been equally benefited. Small dairy agroindustries still face financial and technological barriers to adopting such innovations. This work presents the develop- ment of an automation and web supervision solution for a Compact Electric Slow Pas- teurizer, aiming to modernize the production of small and medium-sized dairy plants at low cost. The methodology involved replacing electromechanical and analog controls with a digital system based on a Programmable Logic Controller (PLC) and Human- Machine Interface (HMI), using Ladder logic for precise control of pasteurization, cool- ing, and treatment cycles. To enable remote supervision, a proprietary IoT communi- cation architecture was developed, consisting of a Python Gateway that performs data acquisition via Modbus TCP/IP protocol and persists them in a database. The system is completed by a Full-Stack Web application (Node.js and React.js), which allows real- time monitoring, user management, report generation, and remote mirroring of the HMI via noVNC. The results demonstrate the technical and economic feasibility of integrat- ing industrial automation and web systems, providing operational standardization, pro- cess traceability, and greater competitiveness for the producer, aligning conventional equipment with Industry 4.0 concepts.