Butanol, as a new generation ofbiofuel, has become one of the research hotspots in the world. The high-yield mutant strains （Clostridium beijerinckii U-57）, was bred by author in the early days of the study, and by taking the aspen steam explosion residues as the raw materials, the butanol was produced with fermentation process. The results show that the aspen steam explosion residue saccharificafion liquid were treated through separate hydrolysis fermentation and simultaneous saccharification fermentation （SSF）, and butanol was obtained, t...
