title: A feasibility study on the multistage process for the oxalic acid pretreatment of a lignocellulosic biomass using electrodialysis.
abstract: The present study investigated the feasibility of the recovery and reuse oxalic acid in a multistage process for the pretreatment of a lignocellulosic biomass. Electrodialysis (ED), an electrochemical process using ion exchange membranes, was used to recover and reuse oxalic acid in the multistage process. The ED optimal condition for recover oxalic acid was potential of 10V and pH 2.2 in synthetic solutions. The recovery efficiency of oxalic acid from hydrolysates reached 100% at potential of 10V. The power consumption to treat 1mol of oxalic acid was estimated to be 41.0wh. At the same time, ethanol production increased up to 19g/L in the ED-treated hydrolysate, corresponding to ethanol productivity of 0.27g/L/h. It was clearly shown that bioethanol fermentation efficiency increased using the ED process, due to a small loss of fermentable sugar and a significantly high removal of inhibitory chemicals.
authors.affiliation: Department of Bioenergy Science and Technology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, South Korea.
authors.forename: Hong-Joo
authors.initials: HJ
authors.lastname: Lee
authors.forename: Sung Ju
authors.initials: SJ
authors.lastname: Ahn
authors.forename: Young-Jun
authors.initials: YJ
authors.lastname: Seo
authors.forename: Jae-Won
authors.initials: JW
authors.lastname: Lee
mesh_terms: D000363:Agaricales / Q000254:growth & development; D056804:Biofuels; D018533:Biomass; D003956:Dialysis; D000431:Ethanol / Q000032:analysis; D005240:Feasibility Studies; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D008031:Lignin / Q000737:chemistry*; D019815:Oxalic Acid / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D056804:Biofuels; C036909:lignocellulose; D000431:Ethanol; D008031:Lignin; D019815:Oxalic Acid