The flow diagram depicts the procedure for plastic bottles recycling.
Looking from an overall perspective, it is apparent that the process comprises 9 stages with collecting and sorting bottles as initial steps and producing new products from former waste materials as an ending phase.
First of all, plastic wastes are collected in specialized bins for recycling, which are afterwards gathered up by workers and transported to the recycling centers by truck. After the bottles are successfully delivered to the center, the plastic is sorted into two groups: recyclable and non-recyclable. In the following stage, the recyclable plastic undergoes compression into square-shaped blocks and is crushed into small pieces, which then fall into a reservoir full of water, where the bits of plastic are washed. Once the pieces are cleaned, they are turned into granules by the use of a machine. After that, the produced pellets are heated at high temperatures to form a material for future products. At the end of the cycle, these raw materials are used to manufacture various products, such as containers, plastic bags, pencils, and even t-shirts.