| 双极膜电渗析法1,3-丙二醇发酵液的脱盐处理及主要副产物的回收 |
| 作者: 北京清华大学化学工程系,北京10084 |
| 单位: 北京清华大学化学工程系,北京10084 |
| 关键词: 双极膜;电渗析; 1,3-丙二醇;脱盐 |
| DOI号: |
| 分类号: TQ028.8 |
| 出版年,卷(期):页码: 2015, 35(1):103-107 |
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摘要: |
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在前期研究的基础上,使用双极膜电渗析系统(bipolar membraneelectrodialysis,简称BMED)脱除1,3-丙二醇(PDO)发酵液中的有机盐和无机盐,脱盐率达到99%以上时,单批次过程能耗为21.9W.h/L发酵液,PDO回收率为96.1%。在此实验基础上进行了七个批次连续脱盐操作,实验结果表明,BMED受连续脱盐操作影响不大,每个批次PDO回收率在92.7%~96.8%之间;七个批次中,每升发酵液脱盐所需的总能耗从21.7W.h增加到了31.6W.h。此外,本实验中得到的碱室液经浓缩后被用于3L和5L的1,3-丙二醇发酵罐的pH调节,酸室液的主要成分丁二酸也被成功结晶回收。 |
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On the basis of previous study, bipolar membraneelectrodialysis,abbreviatedtoBMED, was used in desalination of PDO fermentation broth. Salt rejection was higher than 99% with energy consumption 21.9kW.h/L broth. The recovery ratio of PDO was 96.1%. Besides these, desalination was conducted in a 7-batches continuous processing, and the results indicated that the performance of BMED was little influenced by continuous processing. PDO recovery ratio was between 92.7% and 96.7%. Among the 7 batches, energy consumption increased from 21.7kW.h to 31.6kW.h. Furthermore, the base produced from BMED was reused for adjusting pH of fermentation in 3L and 5L tank, and the acid was crystallized as main product of succinic acid |
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基金项目: |
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作者简介: |
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On the basis of previous study, bipolar membraneelectrodialysis,abbreviatedtoBMED, was used in desalination of PDO fermentation broth. Salt rejection was higher than 99% with energy consumption 21.9kW.h/L broth. The recovery ratio of PDO was 96.1%. Besides these, desalination was conducted in a 7-batches continuous processing, and the results indicated that the performance of BMED was little influenced by continuous processing. PDO recovery ratio was between 92.7% and 96.7%. Among the 7 batches, energy consumption increased from 21.7kW.h to 31.6kW.h. Furthermore, the base produced from BMED was reused for adjusting pH of fermentation in 3L and 5L tank, and the acid was crystallized as main product of succinic acid |
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参考文献: |
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[1] 吴如春,许赟珍,刘德华.1,3-丙二醇后提取技术研究进展.[J].生物工程学报, 2011, 27(3), 494-501. |
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