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Bipolar membrane electrodialysis and ion exchange hybridizing for dilute organic acid solutions treatment

机译：双极膜电渗析和离子交换杂交处理稀有机酸溶液

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摘要

In this work, treatment of very dilute effluents of organic acids by means of an electro-membrane hybrid process is studied. Dilute organic acids effluents are generated by numerous processes. Converting such effluents into pure more concentrated fluxes is a key step in the valorization process. An experimental study has been performed to recover acetic acid by bipolar membrane electrodialysis (BMED). The experiments performed when coupling BMED and ion exchange have clearly demonstrated that hybridization reduces energy consumption. This improvement is due to the decrease of the electrical resistance of the diluted compartment thanks to the ionic conductivity provided by the resins. The effect of back diffusion on the current efficiency was also studied. In the case of acetic acid effluent treatment, investigation of the influence of the resin initial form showed that hydroxyl and acetate initial forms result in very close performances. It is therefore useless regenerating the resin bed.
机译：在这项工作中，研究了通过电膜混合工艺处理非常稀的有机酸废水。稀有机酸的流出物是通过许多过程产生的。将此类废水转化为纯净度更高的通量是增值过程中的关键一步。已经进行了通过双极膜电渗析（BMED）回收乙酸的实验研究。当BMED和离子交换耦合时进行的实验清楚地表明，杂交可以降低能耗。该改进归因于由于树脂提供的离子电导率，稀释室的电阻降低。还研究了反向扩散对电流效率的影响。在乙酸废水处理的情况下，对树脂初始形式的影响的研究表明，羟基和乙酸酯初始形式导致非常接近的性能。因此，树脂床的再生是无用的。

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