ST103: Construction Waste Segregation System

Wayne Liu Zhi Xuen University Of Wollongong Malaysia

This project aimed to build an autonomous segregation system for construction waste that can effectively and efficiently segregate distinctive construction waste without manual intervention. In addition, the project also aims to contribute to contributing to sustainable urbanization by effectively segregating construction waste. The segregation system, or RRR sorting system, is divided into six subsystems; a white input tube, a conveyor system, a rotating tumbler, an electromagnet, a vacuum chamber, and an air purge system. The white input tube has two openings; one at the input, and another at the output end. On the wall of the input tube, two openings were implemented to supply air pressure to segregate plastic and wood waste into two separate containers. The electromagnet was arranged at the bottom of the white input tube so that ferrous metal wastes have a higher possibility of successfully getting attracted by the electromagnet. The tumbler was implemented to segregate sandy materials and allow the remaining waste to roll onto the conveyor belt. The vacuum chamber encompasses two DC fans to create a vortex to sort plastic waste by implementing Bernoulli’s Principle. Finally, the air purge system was used to segregate wood waste from concrete waste by discharging a stream of compressed air. An ultrasonic sensor was implemented at the white input tube that would activate all the subsystems of the sorting system when waste is detected. After the successful fabrication of the RRR sorting system, several tests were conducted. According to the test results, it can be concluded that the RRR sorting system had a decent sorting efficiency, in which it was capable of sorting 85-90% of waste which included metal, plastic, wood, and concrete. The subsystems were arranged linearly for a simple flow of operation of the sorting system. In summary, the RRR sorting system is simple and effective.