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A critical review on waste paper sorting techniques
Rahman, M. O.; Hussain, A. & Basri, H.
Abstract
Efficient waste paper recycling has a significant
role in the sustainable environment. Recyclable waste paper
as a fundamental ingredient of municipal solid wastes
(MSWs) is indeed an ‘‘urban ore’’. Waste papers are considered
as the solid recovered fuel which is recovered from
MSW. Recyclable waste papers are segregated into various
grades to produce high-quality products. Moreover, sorted
paper streams save energy, chemicals, and water, as well as
reduce sludge and rejects. Information technology is widely
integrated with the waste management industry into its
operations such as recycling, reuse, segregating based on
categories and so on. This review article focuses on the life
cycle of waste paper and existing waste paper sorting techniques.
In the paper industry, many types of sensors are used
in different mechanical and optical waste paper sorting
systems. Such sensors include lignin, gloss, stiffness,
mid-infrared, infrared, and color sensors. In this review, also
described the effectiveness of different waste paper sorting
systems, and finally, recommended appropriate waste paper
sorting techniques based on effectiveness and low-cost
implementation.
Keywords
Waste paper sorting; Paper grade; Template matching; Lignin sensor; Stiffness sensor; Color sensor; Intelligent computer vision
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