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对1,3-丙二醇发酵液离子交换耦联电渗析脱盐工艺进行了初步研究,在发酵液小试脱盐研究的基础上,主要研究了电渗析脱盐实验、离子交换树脂的选型和离子交换耦联电渗析工艺。结果表明,单独采用电渗析脱盐1,3-丙二醇损失率为11.41%;通过比较多种阴阳离子交换树脂的pH、电导率以及处理能力,确定耦联中试实验采用树脂LSI296和LSI010;采用离子交换耦联电渗析两步脱盐,效率提高到96.2%,损失率降低到5.88%。
Propanediol fermentation liquid ion-exchange coupled electrodialysis desalination process preliminary study in the fermentation broth small desalination based on the study of the electrodialysis desalination experiments ion exchange resin selection and ion exchange coupling electricity Dialysis process. The results showed that the loss rate of 1,3-propanediol desalting alone was 11.41%. By comparing the pH, conductivity and processing capacity of many anion-cation exchange resins, the coupling experiments of resin LSI296 and LSI010 were determined. Exchange coupled electrodialysis desalination two steps, the efficiency increased to 96.2%, the loss rate decreased to 5.88%.