Bio-modification of eucalyptus chemithermo-mechanical pulp with different white-rot fungi

Modification of chemithermomechanical pulp (CTMP) by fungal treatment was investigated. Eucalyptus CTMP was treated with three different types of white-rot fungi, namely, Phanerochaete chrysosporium (P.c-1767), Trametes hirsute 19-6 (T.h-19-6), and Trametes hirsute19-6w (T.h-19-6w), under a stationary culture condition. Pulp total weight loss, lignin loss, and cellulose loss were determined to compare the different enzymes secreted by the three fungal strains. Pulp physical strengths, optical properties, and bleachability after the fungal treatment were investigated to compare the effect of fungal treatment on the pulp quality improvement. The results show that lignin reduction by both T.h-19-6 and T.h-19-6 (w) was about twice as much as that by P.c-1767. However, the selectivity of T.h-19-6 (w) towards lignin over cellulose was only 0.82, while that of T.h-19-6 was as high as 4.43. After T.h-19-6 treatment, pulp tensile, tear, and internal bonding strength increased by about 27%, 38%, and 40%, respectively.

[1]  General and selective upgrading of mechanical pulps , 1986 .

[2]  Hou‐min Chang,et al.  Biological delignification of pulp by Phanerochaete chrysosporium , 1989 .

[3]  G. F. Leatham,et al.  Biomechanical pulping of aspen chips: energy savings resulting from different fungal treatments , 1990 .

[4]  G. F. Leatham,et al.  Biomechanical pulping of aspen chips: paper strength and optical properties resulting from different fungal treatments , 1990 .

[5]  E. C. Setliff,et al.  Biomechanical Pulping With White-Rot Fungi , 1990 .

[6]  T. Nishida,et al.  Biobleaching of kraft pulp using white-rot fungus IZU-154. , 1991 .

[7]  Masood Akhtar,et al.  Biomechanical pulping of loblolly pine with different strains of the white-rot fungus Ceriporiopsis subvermispora , 1992 .

[8]  M. Tien,et al.  Heterogeneity and regulation of manganese peroxidases from Phanerochaete chrysosporium , 1992, Journal of bacteriology.

[9]  M. Sykes.  Bleaching and brightness stability of aspen biomechanical pulps , 1993 .

[10]  I. Reid,et al.  Biological bleaching of kraft pulps by white-rot fungi and their enzymes , 1994 .

[11]  G. Williams,et al.  Fibre surface characteristics of hardwood refiner pulps , 1995 .

[12]  Ross E. Swaney,et al.  New technology for papermaking : commercializing biopulping , 1998 .

[13]  Ross E. Swaney,et al.  New technology for papermaking : biopulping economics , 1998 .

[14]  P. Gatenholm,et al.  Surface Composition and Morphology of CTMP Fibers , 1999 .

[15]  Ross E. Swaney,et al.  Recent Developments in Biopulping Technology at Madison, WI , 2002 .

[16]  K. Li,et al.  The origins of kraft pulp fibre surface lignin , 2002 .

[17]  E. Gruber.  Is there a future for chemically modified pulp , 2002 .

[18]  A. Ferraz,et al.  Attempts to Correlate Biopulping Benefits with Changes in the Chemical Structure of Wood Components and Enzymes Produced During the Wood Biotreatment with Ceriporiopsis Subvermispora , 2003 .

[19]  K. Eriksson,et al.  Biotechnology in the pulp and paper industry , 1990, Wood Science and Technology.

[20]  W. Kenealy,et al.  A biopulping mechanism: Creation of acid groups on fiber , 2004 .

[21]  A. Ferraz,et al.  Bio‐Chemimechanical Pulps from Eucalyptus grandis: Strength Properties, Bleaching, and Brightness Stability , 2005 .

[22]  Kecheng Li,et al.  The middle lamella remainders on the surface of various mechanical pulp fibres , 2006 .

[23]  A. Ferraz,et al.  Bleaching, brightness stability and chemical characteristics of Eucalyptus grandis-bio-TMP pulps prepared in a biopulping pilot plant , 2006 .