earticle

영어

It is known that about 2 million tons of deconstruction waste is carried into sudokwon landfill site. The deconstruction waste contains waste wood of its 30%, i.e., 600,000 – 700,000 tons/year of waste wood is reclaimed in sudokwon landfill site. Waste wood can be renewable resource for the production of biofuels. Therefore, we estimated the possibility of biobutanol production from waste wood biomass of sudokwon landfill site. There are four kinds of waste wood biomass such as log, ply wood, particle board, and MDF. The analysis of species of tree and chemical composition for each waste wood was performed. The most of log and MDF were soft wood, whereas ply wood and particle board were hard wood. Acetone soluble, hot water soluble, lignin,
and polysaccharides fraction were quantitated for each waste wood. The composition of polysaccharide was also analyzed by 1H NMR spectroscopy. The hydrolysates obtained through concentrated sulfuric acid hydrolysis contained 30-40 g/L of glucose, 5-6 g/L of xylose, 5-15 g/L of mannose, 2-3 g/L of acetic acid, and 0.3-0.5 g/L of total phenolics. The butanol fermentation was carried out in each waste wood hydrolysates by C. acetobutylicum and C. beijerinckii. Although the level of butanol production was some different among the hydrolysates, serious toxicity on the microorganism did not showed. Therefore, we think that the waste wood can be a useful biomass for the biofuel production as an alternative transportation fuel.