It is the result of numerous visits to recycling centers and meetings, particularly in Cairo, Burkina Faso and Thailand. The washing tank was designed in the Plastic Odyssey workshop in Marseille. The washing tank on board the Plastic Odyssey They are then removed from the tank and drained. In contrast, the targeted plastics (PP, HDPE, LDPE), with a lower density than than water, float on the surface of the washing tank. These impurities, which have a higher density than water than water, will sink and settle at the bottom of the tank. The friction between the chips caused by the movement of the water helps loosen impurities. The plastic chips and water contained in a tank are mixed by a system of rotating blades. The role of the washing tank is similar to the action of a washing machine. It makes it possible to integrate this waste, which is currently barely recycled in industry, into the recycling process and thus increase its recovery rates. Washing is an essential step in treating dirty waste. This step is necessary to ensure washing of all inaccessible surfaces, such as the inside of a bottle. The plastic that gets washed is in the form of chips as a result of shredding beforehand. Improper washing causes defects on the new objects it is used to create. These impurities are incompatible with recycling machines and can cause problems during the stages of plastic processing. The purpose of the washing tank is to separate the impurities from the plastic waste.
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