Hydrothermal Treatment of Postconsumer Aseptic Packaging Material: Solid Fuel Production and Aluminum Recovery

In this study, Tetra Brik from Tetra Pak Company was used to produce solid fuel. Tetra Brik consists of paper, LDPE, and Aluminum arranged in 6 different layers. Aluminum should be recovered to obtain high-quality solid fuel. Hydrothermal treatment was used to separate aluminum from the solid fuel. Temperature and time were controlled and observed to get the best result. The temperature was varied between 200 °C and 240 °C, while time was ranged from 0 and 60 minutes. The result showed that composite of aluminum and LDPE was formed in the process, and full separation occurred in the experiment other than 200 °C in 0 minutes. Ultimate and Proximate analysis were done to understand solid fuel characteristic. As the temperature and time got higher, the calorific value also increase.