Efficient Preparation of Xylonic Acid from Xylonate Fermentation Broth by Bipolar Membrane Electrodialysis
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Preparation of xylonic acid from xylonate fermentation broth was studied in a four-chamber bipolar membrane electrodialysis (BMED) setup. The effects of metal-ion size, current density, and xylonate concentration on BMED were evaluated principally with respect to acid yield and partially with respect to efficiency and energy consumption. Sodium xylonate was more successful than potassium xylonate because of its smaller size and easier membrane penetrability for BMDE. Efficient electrodialysis was achieved using 50 mA/cm2 current density for 14 min; thus, we obtained 92% xylonic acid from 100 g/L sodium xylonate fermentation broth. In conclusion, BMED can be used for producing xylonic acid from fermentation broth. Moreover, this study highlights ways of improving the efficiency of BMED.
KeywordsXylonic acid Xylonate fermentation broth Bipolar membrane electrodialysis (BMED) Acid yield Current density
The research was supported by the Key Research and Development Program of Jiangsu (BE2015758) and the National Natural Science Foundation of China (31370573).
Compliance with Ethical Standards
Conflict of Interest
The authors declare that they have no conflict of interest.
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