title: Scale-up study of oxalic acid pretreatment of agricultural lignocellulosic biomass for the production of bioethanol.
abstract: Building on our laboratory-scale optimization, oxalic acid was used to pretreat corncobs on the pilot-scale. The hydrolysate obtained after washing the pretreated biomass contained 32.55g/l of xylose, 2.74g/l of glucose and low concentrations of inhibitors. Ethanol production, using Scheffersomyces stipitis, from this hydrolysate was 10.3g/l, which approached the predicted value of 11.9g/l. Diafiltration using a membrane system effectively reduced acetic acid in the hydrolysate, which increased the fermentation rate. The hemicellulose content of the recovered solids decreased from 27.86% before pretreatment to only 6.76% after pretreatment. Most of the cellulose remained in the pretreated biomass. The highest ethanol production after simultaneous saccharification and fermentation (SSF) of washed biomass with S. stipitis was 21.1g/l.
authors.affiliation: Department of Forest Products and Technology (BK21 Program), Chonnam National University, Gwangju 500-757, Republic of Korea. ljw43376@chonnam.ac.kr
authors.forename: Jae-Won
authors.initials: JW
authors.lastname: Lee
authors.forename: Carl J
authors.initials: CJ
authors.lastname: Houtman
authors.forename: Hye-Yun
authors.initials: HY
authors.lastname: Kim
authors.forename: In-Gyu
authors.initials: IG
authors.lastname: Choi
authors.forename: Thomas W
authors.initials: TW
authors.lastname: Jeffries
mesh_terms: D056804:Biofuels; D018533:Biomass; D002482:Cellulose / Q000737:chemistry; D000431:Ethanol / Q000138:chemical synthesis*; D005285:Fermentation; D005374:Filtration; D008031:Lignin / Q000737:chemistry*; D019815:Oxalic Acid / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry; D004718:Saccharomycetales / Q000378:metabolism*
chemical_list: D056804:Biofuels; D011134:Polysaccharides; C036909:lignocellulose; D000431:Ethanol; C007916:hemicellulose; D002482:Cellulose; D008031:Lignin; D019815:Oxalic Acid