Fungal-organosolv pulping of pinus radiata softwood

摘要

organosolv pulping of fungally pretreated samples of P. radiata was evaluated. A screening study using 5 white-and 2 brown-rot fungi indicated that Ceriporiopsis s ubvermisopora and punctularia artropurpurascens were the most selective ones for lignin degradation. These fungi were further cultured in ioreactors containing 2.5 kg of wood chips. Fungally pretreated samples wer delignified by formic acid/acetone (7:3) at 150 deg C and strength properties of resulting unbleached pulps were evaluated. Thensile and burst inexes were slightly increased in fungally pretreated samples. However tear indexes were 10-30