1,3-丙二醇发酵液离子交换耦联电渗析脱盐的中试研究

Study on Ion exchange coupling with Electrodialytical Desalination of 1, 3-Propanediol fermentation broth in Pilot-plant Level

摘要:

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试验、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，确定耦联中试试验采用树脂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%。

Abstract:

The desalination of fermented broth containing 1,3-propanediol by ion exchange coupling with electrodialysis was studied. Based on the laboratory-scale desalination experiment, the electrodialytical desalination, ion exchange resin, and the coupling process were also investigated. It is showed that the 1,3-PDO loss was 11.41% by electrodialysis. Among various cationic and anionic resins, LSI296 and LSI010 were used to pilot level by comparing pH, conductivity and exchange volume. The efficiency of desalination was improved to 96.2%, and the loss of 1,3-PDO was decreased to 5.88% by ion exchange coupling with electrodialysis.