NDLI: Microbial and enzymatic control of pitch in the pulp and paper industry

Content Provider	Springer Nature Link
Author	Gutiérrez, Ana Río, José C. Martínez, Angel T.
Copyright Year	2009
Abstract	Pitch control is an important aspect in pulp and paper manufacture, and the first example where microbial biotechnology provided successful solutions in this industrial sector. Triglycerides cause deposits in softwood mechanical pulping, and both microbial and enzymatic products have been commercialized to be applied on wood and pulp, respectively. The former are based on colorless strains of sapstain fungi. The latter are improved lipases, including thermostable variants from directed evolution. These enzymes are among the additives of choice in pulping of high-resin-content softwoods. However, lipases are not useful when pitch originates from other lipids, such as steroids and terpenes, and the sapstain inocula are also only partially effective. In the search for stronger biocatalysts to degrade recalcitrant lipids, the potential of white-rot fungi and their enzymes has been demonstrated. When inocula of these fungi are used, wood treatment must be controlled to avoid cellulose degradation. However, the efficiency and selectivity of the laccase-mediator system permits its integration as an additional bleaching stage. A double benefit can be obtained from these treatments since pitch is controlled at the same time that residual lignin is removed facilitating the implementation of totally chlorine free pulp bleaching.
Starting Page	1005
Ending Page	1018
Page Count	14
File Format	PDF
ISSN	01757598
Journal	Applied Microbiology and Biotechnology
Volume Number	82
Issue Number	6
e-ISSN	14320614
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-02-26
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Pitch deposits Paper pulps Wood fungi Fungal enzymes Laccase-mediator system Microbial Genetics and Genomics Microbiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Medicine Applied Microbiology and Biotechnology Biotechnology

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