1. Enhanced biobleaching efficacy and heavy metal remediation through enzyme mediated lab-scale paper pulp deinking process
- Author
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Vinod Kumar Nathan, Narayanan Kannan, R. Gunaseeli, and Mary Esther Rani
- Subjects
0106 biological sciences ,Strategy and Management ,Cellulase ,010501 environmental sciences ,engineering.material ,01 natural sciences ,Industrial and Manufacturing Engineering ,law.invention ,law ,010608 biotechnology ,Effluent ,0105 earth and related environmental sciences ,General Environmental Science ,Laccase ,biology ,Renewable Energy, Sustainability and the Environment ,Chemistry ,Pulp (paper) ,Building and Construction ,Deinking ,Pulp and paper industry ,Xylanase ,engineering ,biology.protein ,Sewage treatment ,Water treatment - Abstract
The biological deinking method using microbial enzymes is quite promising and rather eco-friendly. In this paper, we discuss about the impact of enzymatic deinking of newspaper pulp using ligno-cellulosic (cellulase, xylanase and laccase) and lipolytic enzymes. The individual treatment of paper pulp with enzymes (cellulase/xylanase) could enhance the paper brightness to about 32.86% whereas combinational effect could enhance only about 28.67%. There was a release of chromophores from phenolic and hydrophobic compounds released during the deinking process. Physico-chemical parameters of effluents were also found to be within the standard limits and the metals like iron, lead and zinc were not detected in the enzyme assisted deinking effluent sample. The heavy metals in the paper pulp was found to be reduced after enzyme treatment. The obtained effluent was found have low phytotoxicity and was safe for agricultural applications. Hence, the present report was found to be a suitable enzymatic deinking process which was eco-friendly that results in non-toxic effluents. The method also provides an avenue in water resource recycling within industries.
- Published
- 2018