초록
<P><B>Abstract</B></P> <P>Impact of planetary ball milling on pre-milled wood fiber was studied to improve efficiency of energy consumption for bioconversion using post-harvest forest residuals. Crystalline cellulose decreased from 40.73% to 11.70% by ball milling. Crystallinity index of ball milled wood samples had a negative correlation with glucose yield (r = −0.97, <I>p</I> < .01), xylose/mannose (r = −0.96, <I>p</I> < .01), and a positive correlation with median particle size (r = 0.77, <I>p</I> < .01). Range of glucose yield and xylose/mannose yield for ball milled samples was found to be 24.45–59.67% and from 11.92% to 23.82%, respectively. Morphological changes of the lignocellulosic biomass were observed; the compact fiber bundles of the forest residuals were cleaved to smaller particles with lower aspect ratio with increasing intensity of ball milling. The required energy ranged from 0.50 to 2.15 kWh/kg for 7–30 min of milling respectively.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Planetary ball milling with pre-milling was evaluated as physical pretreatment. </LI> <LI> Crystalline cellulose in the forest residuals was decreased through ball milling. </LI> <LI> Crystallinity of ball milled powder had a negative correlation with sugar yield. </LI> </UL> </P>