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Fractionation of Dry Recycled Papermill Sludge to Higher Value Components

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Recycled paper manufacturing is considered an environmentally favourable practice, however disposal of the waste by-product is a subject of much controversy. Current disposal methods are not sufficient for sustaining the industry. In this work wet and dry fractionation methods are applied to recycled paper mill sludge to determine potential for obtaining homogenous fractions which can be used in value added applications. Kinetically dried sludge showed a greater potential for bio-refining than air dried sludge. Strong chemical bonds developed in air dried sludge prevent separation of component materials. Kinetically dried sludge fractionated successfully into higher purity fractions. The chemical composition and morphology of the sludge agglomerates and derived fractions were investigated using scanning electron microscope (SEM) coupled with energy dispersive X-ray (EDX) analysis and thermo gravimetric analysis.
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Keywords: CALCIUM CARBONATE; DEINKING; FRACTIONATION; KAOLIN; NATURAL FIBRE; PAPER; RECYCLING; SLUDGE DISPOSAL; THERMOGRAVIMETRIC ANALYSIS

Document Type: Research Article

Publication date: 01 December 2007

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  • The goal of the creation of a biobased economy is challenging to agriculture, forestry, academia, government and industry. The extractable resources of the Earth are finite, regardless of the quibble over when they will be depleted. The economic, political and social demands for biobased chemicals, materials and energy are expected to radically transform the materials industries, particularly the plastics industry as well as the biofuel industry. These changes will be based on the principles of sustainability, eco-efficiency, industrial ecology, and green chemistry and engineering. In keeping with the growth of knowledge in this field, there is a strong need for a forum to share original research related to biobased materials and bioenergy. The Journal of Biobased Materials and Bioenergy (JBMB) has been created as an international peer-reviewed periodical to fulfill the need for communication in these research areas. This journal will encompass related research activities in all fields of science, engineering and the life sciences.
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