Application of bipolar electrodialysis on recovery of free lactic acid after simultaneous saccharification and fermentation of cassava starch

被引：0
作者：
Walaiporn Timbuntam
Klanarong Sriroth
Kuakoon Piyachomkwan
Yutaka Tokiwa
机构：
[1] Kasetsart University,Department of Biotechnology, Faculty of Agro
[2] Cassava and Starch Technology Research Unit/National Center for Genetic Engineering and Biotechnology (BIOTEC),Industry
[3] National Institute of Advanced Industrial Science and Technology (AIST),undefined
来源：
Biotechnology Letters | 2008年 / 30卷
关键词：
Ammonium lactate; Bipolar electrodialysis; Cassava starch; Lactic acid; Model solution; Purification;
D O I：
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中图分类号：
学科分类号：
摘要：
The efficiency of bipolar electrodialysis (BED) for the recovery of lactic acid from fermentation broth was evaluated. Three systems of BED (bipolar-anion, bipolar-cation and bipolar-anion-cation) at fixed voltage (20 V) were compared using a model solution of ammonium lactate (100 g l−1). Results showed that bipolar-anion (BED-anion) was the most beneficial in terms of lactate flux, current efficiency, energy consumption and recovery ratio. Consequently, BED-anion was used to purify lactic acid from fermentation broth which had been pre-treated with mono-polar electrodialysis (MED). The final lactic acid concentration and lactate flux obtained were 144 g l−1 and 393 g m−2 h−1, respectively. Using the two-step process (MED and BED-anion) the concentration of fermentation broth was increased by 33% and the total energy consumption was 2.76 kW h kg−1.
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页码：1747 / 1752
页数：5
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