Evaluation of waste mushroom logs as a potential biomass resource for the production of bioethanol.
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 (145 kW h/tone) required significantly higher energy consumption than waste mushroom logs (70 kW h/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, 12 g/L ethanol was produced on waste mushroom logs, while normal wood produced 8 g/L ethanol. These results indicate that waste mushroom logs are economically suitable lignocellulosic material for the production of fermentable sugars related to bioethanol production.
Lee
Jae-Won
JW
Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-921, South Korea.
Koo
Bon-Wook
BW
Choi
Joon-Weon
JW
Choi
Don-Ha
DH
Choi
In-Gyu
IG
D000363:Agaricales / Q000254:growth & development* / Q000378:metabolism; D018533:Biomass; D004734:Energy Metabolism; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D006868:Hydrolysis; D020074:Lentinula / Q000254:growth & development*; D008031:Lignin / Q000378:metabolism; D017744:Medical Waste Disposal / Q000379:methods*; D009578:Nitrobenzenes; D010084:Oxidation-Reduction; D014934:Wood; D014961:X-Ray Diffraction
D017744:Medical Waste Disposal; D009578:Nitrobenzenes; D000431:Ethanol; D008031:Lignin; C036077:nitrobenzene