Article ID Journal Published Year Pages File Type
17729 Enzyme and Microbial Technology 2008 6 Pages PDF
Abstract

Three commercial cellulases were evaluated for their effects on deinking of both fresh and artificially aged old newsprint (ONP) mixed with fresh old magazines (OMG) at a ratio of 7:3. The enzymes were added at the beginning of the repulping stage followed by incubation for up to 3 h. Although these enzymes were able to detach a significant amount of ink from the ONP/OMG, cellulase deinking was less efficient than either sulphite or alkaline deinking chemistry. None of the three cellulase enzymes tested were able to deink aged ONP/OMG, and a poor deinkability was also observed by using either sulphite or alkaline chemistry. However, combining enzymes with sulphite chemistry significantly enhanced sulphite deinking and provided a potential strategy to achieve effective deinking of aged newsprint at neutral pH.

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Physical Sciences and Engineering Chemical Engineering Bioengineering
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