Differences in Bleaching Responses from Fungal versus Bacterial Derived Enzymes, 2011 International Pulp Bleaching Conference



ARE YOU A TAPPI MEMBER? TAPPI members have exclusive, FREE access to technical conference papers and presentations six months after the conference in TAPPI's e-library. The e-Library offers:

  • Unlimited access to more than 18,000+ documents
  • Fast, robust search engine for fast search results
  • Members get FREE access to conference proceedings, TAPPI JOURNAL articles, Paper360º articles, archived Solutions! articles, and much more
  • View thousands of technical paper abstracts
  • Ability to search by keyword, title, author, events or industry segment

*Technical papers and presentations are available for sale immediately following the conferences before the 6 month embargo period.

Please Note: This document will be available in PDF format in the "My Electronic Documents" link on the home page once your order has been completed. Please make sure you have the latest version of Acrobat Reader. Click on the Acrobat Reader icon to check for the latest version, it’s FREE. To print a hardcopy of a PDF file correctly you must have a postscript printer. If you are not sure if your printer is a postscript printer please refer to your owner’s manual.

Purchase of electronic (downloadable) documents made at www.tappi.org by credit cards, followed by instant download CANNOT be cancelled. We do not offer refunds on electronic download documents.

Several mills within North America have been successfully employing xylanase enzymes expressed from tricaderma reesei, (a fungus) as part of their bleaching sequence for many years. These mills encompass hardwood and softwood species with and without oxygen delignification. These mills also include three, four, and five stage bleaching sequences. The North American mills tend to report increased pulp brightness ceilings and decreased bleaching costs as benefits associated with the application of enzymes in the bleaching process. Laboratory testing suggests that eucalyptus pulp is highly susceptible to both fungal and bacterial derived enzyme bleaching and should result in significant levels of cost savings in South American mills. At least four different mills in South America have attempted to perform enzyme bleaching trials using bacterial derived enzymes. Each of these mill trials have resulted in significantly increased operating costs and/or unsustainable operating conditions. More recently, one of these South American mills has performed a short trial employing a commercially available fungal derived enzyme. This trial was technically successful. The current work attempts to determine why the South American mill experiences with bacterial derived enzymes have been poor while North American mills and the one South American mill trial have good results with fungal derived enzymes. Operating conditions and trial goals for both North and South American mills will be examined and discussed.

Author: Peter W. Hart
Differences in Bleaching Responses from Fungal versus Bacter
Differences in Bleaching Responses from Fungal versus Bacterial Derived Enzymes, 2011 International Pulp Bleaching Conference
30.00

New Releases

 

TAPPI Press Catalog




See More

 

Handbook For Pulp and Paper Technologists (The SMOOK Book), Fourth Edition

The best-selling text to introduce the entire technology of pulp and paper manufacture.

Purchase

 

Nanocellulose End Users Guide and Perspectives Set


Together, the two books form a complete set, and provide an in-depth study of the market for cellulose nanomaterials with critical insights for producers, processors, and end users.

Purchase

 

Check our newest additions.


TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries. 

See More

   
 

Available for Purchase – Conference Proceedings


TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.

See More