Enzymatic treatments of pulps
1992
Jeffries, T.W.
The pulp and paper industry processes huge quantities of lignocellulosic biomass every year; the technology for pulp manufacture is highly diverse, and numerous opportunities exist for applying microbial enzymes. Enzymes have been used to increase pulp fibrillation and water retention and to reduce beating times in virgin pulps. With recycled fibers, enzymes have been used to restore bonding and increase freeness. Specialized applications include the reduction of vessel picking in tropical hardwood pulps and the selective removal of xylan from dissolving pulps. The single most important application is in the removal of lignin from kraft pulps. Both lignin-degrading and hemicellulose-degrading enzymes have been shown to be effective for this purpose, but many other microbial enzymes remain to be examined. Eventually, microbial enzymes in conjunction with the appropriate chemical of thermochemical extractions might enable the fractionation of cellulose, hemicellulose, and lignin from pulps and other lignocellulosics.
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