| Popis: |
This review article summarizes the results on microstructural changes and delignificantion, lignin-degrading enzyme systems, and biopulping of wood with lignin-degrading fungi. Biopulping, defined as the treatment of wood chips with lignin-degrading fungi prior to pulping, saves substantial amount of electrical energy during mechanical pulping, results in stronger paper, and lowers the environmental impact of pulping. Optical properties are diminished; however, brightness can be restored readily with peroxide bleaching. The economics of the process look attractive if the process can be performed in a chip-pile based system. Past work on biopulping had been minimal, however a comprehensive evaluation of biopulping at the Forest Products Laboratory suggests that biopulping has a good chance of commercial success. |
