การพัฒนาระบบ IoT รีไซเคิลน้ำและเศษน้ำแข็งโดยใช้การสะกิดเตือนเชิงนิเวศเพื่อเสริมสร้างพฤติกรรมการคัดแยกขยะอย่างยั่งยืน

Abstract

In the framework of smart city development, efficient waste management and water resource circularity are critical challenges. An environmental issue frequently overlooked in buildings is the contamination of dry waste by liquids, caused by disposing of beverage cups containing fluid and ice scraps directly into general bins. This study presents an IoT-based water and ice scrap recycling system prototype that integrates Internet of Things technology with Eco-Nudge mechanisms to foster waste sorting behavior change. The architecture employs an ESP32 microcontroller paired with flow sensors to manage liquid storage via a stainless-steel filter mesh, alongside a Three.js graphical engine to generate real-time 3D visualizations that deliver psychological rewards to users by converting collected water volume into a corresponding number of chili plants. The stored water can be automatically distributed to a plant irrigation system. Engineering evaluations demonstrated that the flow sensors achieved mean measurement errors of 1.16% and 4.23%, with standard deviations of ±7.9 and ±31.8 mL, respectively. The data recovery system achieved a 100% success rate, and the automated control system successfully triggered plant irrigation under the specified conditions. A preliminary field test indicated that the system attracted passerby attention; however, systematic behavioral evaluation is required in future research.