Evaluation of waste mushroom logs as a potential biomass resource for the production of bioethanol
2008
Lee, Jae-won | Koo, Bon-Wook | Choi, Joon-Weon | Choi, Don-Ha | Choi, In-Gyu
In order to investigate the possibility of using waste mushroom logs as a biomass resource for alternative energy production, the chemical and physical characteristics of normal wood and waste mushroom logs were examined. Size reduction of normal wood (145kWh/tone) required significantly higher energy consumption than waste mushroom logs (70kWh/tone). The crystallinity value of waste mushroom logs was dramatically lower (33%) than normal wood (49%) after cultivation by Lentinus edodes as spawn. Lignin, an enzymatic hydrolysis inhibitor in sugar production, decreased from 21.07% to 18.78% after inoculation of L. edodes. Total sugar yields obtained by enzyme and acid hydrolysis were higher in waste mushroom logs than in normal wood. After 24h fermentation, 12g/L ethanol was produced on waste mushroom logs, while normal wood produced 8g/L ethanol. These results indicate that waste mushroom logs are economically suitable lignocellulosic material for the production of fermentable sugars related to bioethanol production.
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