Surface modification of PVDF hollow fiber membrane and its application in membrane aerated biofilm reactor (MABR)
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- 作者：Feifei Hou ; Baoan Li ; Minghao Xing ; Qin Wang ; Liang Hu ; Shichang Wang
- 关键词：MABR ; Composite membrane ; COD removal ; Nitrogen removal
- 刊名：Bioresource Technology
- 出版年：2013
- 出版时间：July, 2013
- 年：2013
- 卷：140
- 期：Complete
- 页码：1-9
- 全文大小：2547 K
文摘
A novel composite hollow fiber membrane for membrane aerated biofilm rector (MABR) was prepared by coating L-3,4-dihydroxyphenylalanine (DOPA) on the surface of PVDF membrane. MABR process study was conducted to test the performances of the original and modified membranes for 166 days. The results indicate that coated membrane showed 2 times higher gas flux, lower water contact angle (declined from 86.5¡ã to 52¡ã), and significantly improved surface roughness. The modified membrane displayed an excellent MABR performance. Its COD, -N and TN removal efficiencies were kept above 90 % , 98.8 % and 84.2 % during the first 4-month experiment. By tracking experiment at 0.01 MPa, to achieve COD removal efficiency of 85.9 % , half an hour is required with the modified membrane, instead of 6 h using the original one. Besides, faster -N and TN removal at 0.01 MPa were also achieved with DOPA composite membrane.