title: Oxidative production of xylonic acid using xylose in distillation stillage of cellulosic ethanol fermentation broth by Gluconobacter oxydans.
abstract: An oxidative production process of xylonic acid using xylose in distillation stillage of cellulosic ethanol fermentation broth was designed, experimentally investigated, and evaluated. Dry dilute acid pretreated and biodetoxified corn stover was simultaneously saccharified and fermented into 59.80g/L of ethanol (no xylose utilization). 65.39g/L of xylose was obtained in the distillation stillage without any concentrating step after ethanol was distillated. Then the xylose was completely converted into 66.42g/L of xylonic acid by Gluconobacter oxydans. The rigorous Aspen Plus modeling shows that the wastewater generation and energy consumption was significantly reduced comparing to the previous xylonic acid production process using xylose in pretreatment liquid. This study provided a practical process option for xylonic acid production from lignocellulose feedstock with significant reduction of wastewater and energy consumption.
authors.affiliation: State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
authors.forename: Hongsen
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
authors.forename: Xushen
authors.initials: X
authors.lastname: Han
authors.affiliation: State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
authors.forename: Chengxiang
authors.initials: C
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China. Electronic address: jbao@ecust.edu.cn.
authors.forename: Jie
authors.initials: J
authors.lastname: Bao
mesh_terms: D001709:Biotechnology / Q000379:methods*; D057168:Distillation; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D020600:Gluconobacter oxydans / Q000378:metabolism*; D008031:Lignin / Q000737:chemistry / Q000378:metabolism; D008962:Models, Theoretical; D010084:Oxidation-Reduction; D018520:Plant Shoots / Q000737:chemistry / Q000378:metabolism; D013402:Sugar Alcohols / Q000378:metabolism*; D013464:Sulfuric Acids / Q000737:chemistry; D062065:Wastewater; D014994:Xylose / Q000378:metabolism; D003313:Zea mays / Q000737:chemistry* / Q000378:metabolism
chemical_list: D000431:Ethanol; D008031:Lignin; D013402:Sugar Alcohols; D013464:Sulfuric Acids; D062065:Wastewater; D014994:Xylose; C036909:lignocellulose; C033158:sulfuric acid
keywords: Distillation stillage; Ethanol fermentation; Lignocellulose; Xylonic acid; Xylose