Improved enzymatic hydrolysis of waste paper by ozone pretreatment |
| |
Authors: | Yasuo Kojima Seung-Lak Yoon |
| |
Institution: | (1) Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kita-ku, Sapporo 060-8589, Japan;(2) Chinju National University, Chinju, Korea |
| |
Abstract: | Waste paper samples made from newsprint, copier paper, and magazine paper, as well as samples of kraft pulp and thermomechanical
pulp, were pretreated with ozone to improve enzymatic hydrolysis. The ozone treatment of pulps of newsprint and of magazine
paper increased the specific surface areas and total pore volumes while decreasing the lignin content so that these values
became similar to those of thermomechanical pulps. These morphological and chemical changes in the pulps resulted in the increased
access of cellulase to the pulp fiber surface and increased enzymatic hydrolysis. For copier paper, in which the lignin content
was very low, additives on the pulp fiber surface were oxidized and removed by ozone treatment and extraction, and this allowed
improved enzymatic hydrolysis. In contrast, surface areas and total pore volumes of kraft pulp and bleached kraft pulp were
decreased by the ozone treatment, resulting in morphological changes in the pulps that decreased enzymatic hydrolysis. |
| |
Keywords: | Waste paper Enzymatic hydrolysis Ozone treatment |
本文献已被 SpringerLink 等数据库收录! |
|