Formic acid/acetone-organosolv pulping of white-rotted Pinus radiata softwood.

摘要: Organosolv pulping of fungally pretreated samples Pinus radiata was evaluated. A screening study using five white-rot fungi indicated that Ceriporiopsis subvermisopora and Punctularia artropurpurascens were the most selective ones for lignin degradation. These further cultured in bioreactors containing 2.5 kg wood chips. Fungally-pretreated delignified by formic acid/acetone (7:3) at 150°C. Pulping kinetics strength properties resulting unbleached pulps Delignification rates xylan solubilization higher decayed than undecayed control, except sample biotreated with P. 30 days. C. subvermispora proved appropriate treating before organosolv pulping, since pretreatment this fungus resulted faster delignification lower residual lignin. Increases tensile index ranging from 3% to 22% observed prepared samples, independently both fungal species used extent biodegradation expressed as weight loss. However, tear burst indexes brightness or similar those control.