MULTIPLE BENEFITS FROM THE USE OF XYLANASE IN A HARDWOOD KRAFT MILL ATNEXFOR FRASER PAPER IN THURSO QUEBEC

摘要

A xylanase treatment stage was implemented in the fiber line at Thurso, Quebec, in the high-density storage tower,before the first bleaching stage. A Total Kappa Factor (TKf) reduction of 10.9% was obtained as a result of xylanasetreatment, while maintaining the final product properties. The xylanase treatment also allowed an increase in thefeed kappa number of 0.8 units, a decrease in steam consumption of 0.21 GJ/adt and a boost in maximum bleachproduction of 10 adt/day. The results obtained in the mill matched and in some cases exceeded the experimentaldata.