Characterization of oxalic acid pretreatment on lignocellulosic biomass using oxalic acid recovered by electrodialysis

► Most of the oxalic acid was recovered by electrodialysis treatment. ► Some of the fermentation inhibitors were removed by electrodialysis treatment. ► The ethanol production and ethanol yield significantly increased by electrodialysis treatment. ► The performance of oxalic acid pretreatment using recovered oxalic acid was stable.