Results of deinking efficiency of photocopier paper showed that the enzyme used in the present work performed better than the conventional chemicals used for deinking.Įnzymatic and chemical deinking not only significantly influence the optical and mechanical properties of deinked paper, but also influence the pulp properties and wastewater effluent generated. The physical properties, namely burst index and tensile index, were observed to improve by 15.3% and 2.7%, respectively and brightness and tear index decreased by 2.1% and 21.9%, respectively. The application of enzymatic deinking improved ink removal efficiency by 24.6% and freeness by 21.6% with a reduction in drainage time of 11.5% in comparison to those obtained with chemical deinking. Then these parameters were compared in terms of ink removal ability of the process, as well as optical and strength properties of the deinked paper. The ink was removed by flotation and washing processes. Parameters of deinking experiments were optimized for hydrapulping. In this study the deinking of photocopier paper was examined using chemicals and a commercial cellulase enzyme. Enzymes offer potential advantages in ecofriendly deinking of recovered paper. Recycling of photocopier paper is a major problem due to difficulty in removal of nonimpact ink. The utilization of post-consumer papers in the production of new paper products is increasing all over the world in recent years. To overcome these problems, the dispersive system operations are controlled by PLC along with sensors which make the process easier and replacing the chemicals with enzymes will reduce the chemical concentration level of industrial outlet water and increases the quality of paper. In conventional deinking technology, dispersive system is controlled by DCS which is quite complicated to control complex loop of operations. Chemicals are added in this deinking process which causes a serious problem by increasing the chemical concentration level of industrial outlet water. In recycling, dispersive system is responsible for the de-inking process, which is one of the pulp purifying process which removes the printing ink from fibers. Now there is a need to increase the quality of recycled paper to equalize the quality of virgin paper, to reduce the demand for trees to make virgin pulp. The paper, which is made from virgin pulp is called as virgin paper and this is considered as better quality paper than the recycled paper. The demand for trees, which are the basic raw material for making virgin pulp, increasing constantly in enormously growing paper manufacturing industry. Virgin pulp is made by splitting up cellulose fibers from the woods by mechanical and chemical process without adding any recycled pulp content.
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