Development of a low-cost reverse vending machine for clear plastic bottles and aluminum cans
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Abstract
The trend of environmental conservation has become an interesting topic over the past decade; a lot of waste has been recycled to preserve the environment. The objective of this research was to design and develop a low-cost reverse vending machine to support solid waste management in Khao Rup Chang Municipality, Songkhla province, Thailand. For the first step, clear plastic bottles and aluminum cans were classified using a color sensor and a proximity sensor. Next, coupon slips and earned points could be printed out for customers to exchange for money or rewards under the project. All of the mentioned steps were controlled by a microcontroller. The experiments were conducted using 1280 samples. The results showed that the accuracy of sorting three types of materials: clear plastic bottles, aluminum cans, and both materials, was 96.50%, 100%, and 95.25%, respectively. The processing time for each container was 5.52 s on average.
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