title: Pretreatment of Populus tomentosa with Trametes velutina supplemented with inorganic salts enhances enzymatic hydrolysis for ethanol production.
abstract: Different nutrients were added into the solid fermentation of woody biomass, Populus tomentosa, to improve pretreatment by a white rot fungus, Trametes velutina. Fungal pretreatment supplemented with trace elements resulted in large amount of lignin loss but low degradation of carbohydrate. Only 12.6 % of Klason lignin was left in the residues pretreated by T. velutina for 8 weeks supplemented with 1 % trace elements (TE group). When fungal-pretreated residues were subjected to enzymatic hydrolysis for 96 h, a maximum reducing sugar yield of 44 % was obtained from the TE group at the 8th week, 2.3 times higher than that of untreated samples. In addition, the highest ethanol yield of 22 % was observed by the fermentation of 8-week pretreated residues from the basic medium plus trace element group, which was five times more than that of untreated samples.
authors.affiliation: Institute of Microbiology, Beijing Forestry University, Beijing, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Tongqi
authors.initials: T
authors.lastname: Yuan
authors.forename: Baokai
authors.initials: B
authors.lastname: Cui
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Dai
mesh_terms: D001709:Biotechnology / Q000379:methods; D050260:Carbohydrate Metabolism; D000431:Ethanol / Q000378:metabolism*; D006868:Hydrolysis; D032107:Populus / Q000378:metabolism*; D012492:Salts / Q000378:metabolism*; D055454:Trametes / Q000378:metabolism*
chemical_list: D012492:Salts; D000431:Ethanol