Pervaporation performance of PDMS/ceramic composite membrane in acetone butanol ethanol (ABE) fermen
Pervaporation performance of PDMS/ceramic composite membrane in acetone butanol ethanol (ABE) fermen
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DOI：
10.1016/j.memsci.2011.02.042
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发表时间：
2011-05
期刊：
影响因子：
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通讯作者：
Gongpin Liu;Wang Wei;Hao Wu;Xueliang Dong;M. Jiang;W. Jin
中科院分区：
文献类型：
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作者：
Gongpin Liu;Wang Wei;Hao Wu;Xueliang Dong;M. Jiang;W. Jin
渗透汽化技术在生物质发酵过程中回收生物燃料的研究中具有广阔的应用前景。本研究将PDMS/陶瓷复合膜直接与丙酮丁醇乙醇（ABE）发酵过程耦合，实现了ABE发酵液中有机溶剂的原位去除。系统研究了膜PV在发酵废液和发酵-PV耦合过程中的性能和稳定性。如在ABE发酵液中观察到的，无机盐有利于增加膜选择性，而微生物细胞导致PV性能降低。在发酵-光伏耦合过程中，由于膜污染的发生，膜性能出现波动，但PDMS/陶瓷复合膜的通量高达0.670kg/m2 h，ABE分离因子为16.7。SEM、AFM和FT-IR表征结果表明，活性细胞在膜表面的吸附是膜污染的主要原因。然而，在耦合过程中的膜污染是可逆的，与简单的水冲洗后的PV性能容易恢复。
Pervaporation (PV) has attracted increasing attention owing to its potential application in biofuel recovery from biomass fermentation process. In this work, PDMS/ceramic composite membrane was directly coupled with acetone butanol ethanol (ABE) fermentation to in situ remove ABE solvents from the fermentation broth. The membrane PV performances and stability in the spent fermentation broth and fermentation–PV coupled process were systematically investigated. As observed in the ABE fermentation broth, the inorganic salts favored increasing the membrane selectivity whereas the microbial cells resulted in a reduced PV performance. Although a fluctuation of membrane performance was observed due to the occurrence of membrane fouling in the fermentation–PV coupled process, the PDMS/ceramic composite membrane exhibited a high flux of 0.670kg/m2h and applicable ABE separation factor of 16.7. The SEM, AFM and FT-IR characterizations confirmed that the membrane fouling originated from the adsorption of active cells on the membrane surface. Nevertheless, the membrane fouling in the coupled process was reversible, with easy recovery of PV performance after a simple water rinse.