期刊
BIORESOURCE TECHNOLOGY
卷 147, 期 -, 页码 442-448出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.08.045
关键词
Fermentation; Electrodialysis; Lactic acid; Bipolar membranes; Ion exchange membrane
资金
- National Natural Science Foundation of China [21025626, 21206154]
- National High Technology Research and Development Program 863 [2012AA03A608]
- Programs of Anhui Province for Science and Technology [11010202157]
An experimental study was carried out to achieve a continuous integrated operation of fermentation and electrodialysis with bipolar membranes (EDBM). There need three steps to accomplish this experiment: (1) individual continuous fermentation; (2) individual continuous EDBM; (3) integrated operation of fermentation and EDBM under continuous condition. The results indicate that the maximum feed rate (fermenter can afford) is 0.24 L/h, which is also equal to the feed rate of the subsequent individual continuous EDBM. During continuous EDBM, the recovery ratio of lactate from the fermentation broth can reach 69.5% under a current density of 40 mA/cm(2). The net end concentration and total molar quantity for lactic acid can reach 1.46 mol/L and 2.18 mol, and for OH- are 1.32 mol/L and 1.70 mol, respectively. The integration can be achieved only under an initial alkali concentration of no less than 1 mol/L and a current density of no less than 30 mA/cm(2). (C) 2013 Elsevier Ltd. All rights reserved.
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