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Biodeinking

Chapter

Abstract

Ink removal is a significant technical hurdle to the greater use of recycled paper. Conventional deinking process requires significant energy input and harsh chemical usage to help dislodge ink particles from fiber surfaces and enhance the removal of ink particles. Enzyme-based deinking shows promise as a means of reducing chemical use and wastewater treatment. Brightness response to enzyme treatment varies considerably, but it often rivals or surpasses brightnesses obtained with conventional deinking processes. Residual dirt count for enzymatically deinked pulps is also generally lower. Additional benefits include higher freeness and greater paper strength. Results for pulp yield are inconclusive. Several enzymes have been used for deinking of various recycled fibers, but the main enzymes used are cellulases and hemicellulases. Extensive research has been undertaken that demonstrates the application of enzymes and their effectiveness. Different mechanisms for ink removal by enzymes have also been proposed. Operating conditions must be optimized for successful deinking.

Keywords

Forest Product Laboratory Immobilize Cellulase Breaking Length Recycle Fiber Alkaline Cellulase 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Thapar Research and Development Center ColonyPatialaIndia

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