The picture illustrates the process of recycling paper. Overall, the process comprises four main stages, starting from making pulp from used paper, through filtering and cleaning, to fully recycled paper.
The process begins with the used paper being conveyed on a belt into a large chamber, which contains a mixture of water and chemicals to clean the paper and break it down into fibre to form unfiltered pulp. This unfiltered pulp is then filtered to eliminate unwanted particles. Subsequently, the filtered pulp enters the cleaning stage, where it is deinked with water and soap in another chamber. During this stage, an air pump is installed, creating bubbles so that the ink is caused to rise to the surface, from where the ink is then removed through another pipe. This step is essential to ensure the pulp is free from any residual printing substances.
The process then moves to the final stage, during which clean pulp is passed through heated rollers, which squeeze out water and produce rolls of recycled paper.