Ethanol production from acid hydrolysates based on the construction and demolition wood waste using Pichia stipitis.
The feasibility of ethanol production from the construction and demolition (C&D) wood waste acid hydrolysates was investigated. The chemical compositions of the classified C&D wood waste were analyzed. Concentrated sulfuric acid hydrolysis was used to obtain the saccharide hydrolysates and the inhibitors in the hydrolysates were also analyzed. The C&D wood waste composed of lumber, plywood, particleboard, and medium density fiberboard (MDF) had polysaccharide (cellulose, xylan, and glucomannan) fractions of 60.7-67.9%. The sugar composition (glucose, xylose, and mannose) of the C&D wood wastes varied according to the type of wood. The additives used in the wood processing did not appear to be released into the saccharide solution under acid hydrolysis. Although some fermentation inhibitors were detected in the hydrolysates, they did not affect the ethanol production by Pichia stipitis. The hexose sugar-based ethanol yield and ethanol yield efficiency were 0.42-0.46 g ethanol/g substrate and 84.7-90.7%, respectively. Therefore, the C&D wood wastes dumped in landfill sites could be used as a raw material feedstock for the production of bioethanol.
Department of Chemical Engineering, Kwangwoon University, Seoul 139-701, Republic of Korea.
Dae Haeng
DH
Cho
Soo-Jeong
SJ
Shin
Yangwon
Y
Bae
Chulhwan
C
Park
Yong Hwan
YH
Kim
D000143:Acids; D001673:Biodegradation, Environmental; D002241:Carbohydrates / Q000032:analysis; D004602:Elements; D000431:Ethanol / Q000032:analysis*; D005285:Fermentation; D006868:Hydrolysis; D007700:Kinetics; D010843:Pichia / Q000378:metabolism*; D014866:Waste Products / Q000032:analysis*; D014934:Wood / Q000737:chemistry*
D000143:Acids; D002241:Carbohydrates; D004602:Elements; D014866:Waste Products; D000431:Ethanol