백색부후균 전처리에 의한 목재 칩의 Biopulping = Biopulping for Wood Chips by Pretreatment with White-rot Fungus

다국어 초록 (Multilingual Abstract)

Pulping process is to mainly obtain lignocellulosic fibers for papermaking from wood resources. Three types of pulping method have been basically employed, such as chemical pulping, mechanical pulping, and their combination methods.
Biopulping technique has been mainly applied in mechanical pulping by pretreatment of white-rot fungi into the ultrastructure of wood cell wall. The main purpose of biopulping is to improve the pulp qualities, paper properties, and to reduce the energy costs and environmental impact, compared to traditional pulping systems.
Nowadays, biopulping is frequently tried in chemical pulping operation for environmental concept, fiber modification, improvement of physical properties of paper and economic savings. The pretreatment of white-rot fungi prior to chemical pulping could affect the swelling and softening of wood cell walls by the behaviors of modification and depolymerization of ligin compounds.
This study was carried out to investigate the effectiveness of biological treatment to wood chips by white-rot fungus and its structural change of lignocellulosic fiber via kraft pulping. A rotary bioreactor was applied for pretreatment of biological action.
The treatment of white-rot fungus was shown in weight loss of chips. After bio-kraft pulping, kappa number and total yield of pulps were measured, and reduced. Freeness(CSF) values were also decreased. Whereas brightness values were increased, compared to untreated control. The physical strength of handsheets was shown a slight increase in tensile, tear, burst, and folding endurance, with bio-treatments.