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Bipolar membrane electrodialysis (BMED), which integrating the functions of conventional electrodialysis and bipolar membranes, can provide H+ and OH-under an electric current but without the introduction of other salts.One of the most important applications of BMED technology is in organic acid production industry.The industrial application of BMED requires the feed organic salt must keep at high concentration.Meantime, electrodialysis technology can obtain the concentrating or diluting of the organic salt.Based on this background, an integration of two techniques may reach a synergic effect for organic acid production.To evaluate the adaptability of this combination, an accompanying electrodialysis stack was added to the BMED stack, and the performance of this in-situ integration was then investigated.The influences of some parameters such as current density, feed concentration and electrolyte concentration on the production of gluconic acid were discussed.Results indicated that such kind of in-situ integration was feasible, the performance of the combined stack was improved compared with the uncombined stack.Moreover, this integration can simplify two steps process into one step.