Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2017 - September 06, 2017
Recently, a lignocellulose conversion technology is required for biomass into fuels and chemical products. However, a pretreatment of lignocellulosic biomass is needed before bioconversion process, since it has the recalcitrant structure. In this study, the effect of the ozone treatment on the cedar powder was investigated by the lignin quantification test and the enzymatic saccharification test, in anticipation of combined a pretreatment of mechanical pulverization and ozone treatment. Before ozone treatment, the cedar powder was sieved into three particle size, using meshes of 2, 0.6 and 0.4 mm. And also the moisture content of cedar powder was adjusted for three conditions of 30, 40 and 50 %. As a result, the Klason lignin content in the cedar powder was decreased with the increasing ozone treatment time. And also the enzymatic saccharification efficiency of the cedar powder was increased. It was suggested that the enzymatic hydrolysis was improved by decomposed lignin. In addition, the cedar powder with high moisture content showed a good reactivity with ozone. On the other hand, the cedar powder with a small particle size did not react well with ozone. Therefore, when combining mechanical pulverization and ozone treatment, it was expected ozone treatment before pulverization to be better.
