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Elsevier, Journal of Biotechnology, 1(108), p. 79-89

DOI: 10.1016/j.jbiotec.2003.10.016

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Enzymatic versus chemical deinking of non-impact ink printed paper

Journal article published in 2004 by H. Pala, M. Mota, F. M. Gama ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Enzymatic versus chemical deinking is examined for MOW and photocopy prints. Several enzymatic preparations and two fibre/ink particle separation methods are tested. Deinking was monitored by image analysis and standard pulp and paper characterisation procedures. The effectiveness of the fibre/ink particle separation method depends on the ink particle’s size: for smaller particles a washing step is recommended whereas for larger particles, the use of flotation is necessary. The enzymatic treatment is a competitive alternative for MOW and photocopy paper deinking. However, the process requires the selection of an adequate enzymatic preparation for each paper grade.