The diagram illustrates the comprehensive process of paper production and its subsequent recycling.
The procedure is delineated into two primary phases: the initial manufacturing of paper from raw materials and the recycling process of discarded paper. Both phases entail intricate mechanical operations aimed at transforming raw timber into usable paper and reintroducing waste paper into the production cycle.
In the initial phase of production, the process commences with the felling of trees, followed by the removal of bark utilizing rotating drums. Subsequently, the debarked wood is processed into smaller fragments known as wood chippings. These chippings are then fed into a refiner during the pulping stage, which generates pulp. This pulp is further subjected to a pressing operation, where it is compressed into flat sheets. Finally, the processed sheets are rolled and prepared for use as paper products.
The recycling phase begins with the utilization of printed newspapers. Upon disposal, these newspapers are collected and directed into the recycling system. The first step involves an ink removal process to eliminate residual ink, enabling the recovered paper to be cleansed effectively. Following this de-inking, the purified paper is repulped, resulting in a new batch of pulp that can seamlessly reintegrate into the paper production line, thereby facilitating a sustainable cycle of paper usage.