title: De-ashing treatment of corn stover improves the efficiencies of enzymatic hydrolysis and consequent ethanol fermentation.
abstract: In this study, corn stover with different ash content was pretreated using dry dilute acid pretreatment method at high solids loading of 67% (w/w). The results indicate that the hydrolysis yield of corn stover is increased from 43.30% to 70.99%, and ethanol yield is increased from 51.74% to 73.52% when ash is removed from 9.60% to 4.98%. The pH measurement of corn stover slurry indicates that the decrease of pretreatment efficiency is due to the neutralization of sulfuric acid by alkaline compounds in the ash. The elemental analysis reveals that the ash has the similar composition with the farmland soil. This study demonstrates the importance of ash removal from lignocellulose feedstock under high solids content pretreatment.
authors.affiliation: State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Yanqing
authors.initials: Y
authors.lastname: He
authors.affiliation: State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Zhenhong
authors.initials: Z
authors.lastname: Fang
authors.affiliation: State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Youtell Biotech Co., 526 Ruiqing Road, Pudong District, Shanghai 201201, China.
authors.forename: Xinliang
authors.initials: X
authors.lastname: Li
authors.affiliation: State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China. Electronic address: jbao@ecust.edu.cn.
authors.forename: Jie
authors.initials: J
authors.lastname: Bao
mesh_terms: D001709:Biotechnology / Q000379:methods*; D050260:Carbohydrate Metabolism; D002480:Cellulase / Q000378:metabolism*; D002482:Cellulose / Q000378:metabolism; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D014866:Waste Products; D014990:Xylans / Q000378:metabolism; D003313:Zea mays / Q000737:chemistry*
chemical_list: D014866:Waste Products; D014990:Xylans; D000431:Ethanol; D002482:Cellulose; D002480:Cellulase
keywords: Ash removal; Corn stover; Ethanol fermentability; High solids content; Hydrolysis yield