Design and fabrication of a food waste dryer

Methods such as landfilling, incineration, and aerobic composting of waste are not suitable methods for their management because the production of greenhouse gases and the accumulation of vermin and high cost and the need for a lot of space are the problems of using these methods. The purpose of this study is to select a suitable method with the lowest energy consumption and maximum efficiency in the use of waste. For this purpose, a dryer was designed and fabricated for vegetable and food waste. The most suitable method of waste drying, the method of moving the mass using a helix, was selected. In this food waste dryer, to prevent energy loss, the tank of the device was made of double walls, and ceramic insulation was used between the two walls, and the perforated tank inside the device will cause uniform drying by spreading heat to all parts of the waste. Hot air from the tank outlet was also used. The results of the calculators showed that about 69,000 kJ of energy is needed to remove about 30 kg of moisture from the waste. This high capacity will be able to be used in small and large restaurants and kitchens and for livestock consumption.