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Comparison study on the performance of two different gas-permeable membranes used in a membrane-aerated biofilm reactor

This study compared the performance of two different gas-permeable membranes, PVDF and PP membrane, in a membrane-aerated biofilm reactor (MABR). The surface characteristics and membrane pore blocking of these two membrane materials were studied utilizing AFM, SEM and CLSM. The PVDF membrane surface...

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Bibliographic Details
Published in:The Science of the total environment 2019-03, Vol.658, p.1219-1227
Main Authors: Wu, Yun, Wu, Zuodong, Chu, Hongliang, Li, Juan, Ngo, Huu Hao, Guo, Wenshan, Zhang, Nan, Zhang, Hongwei
Format: Article
Language:English
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Summary:This study compared the performance of two different gas-permeable membranes, PVDF and PP membrane, in a membrane-aerated biofilm reactor (MABR). The surface characteristics and membrane pore blocking of these two membrane materials were studied utilizing AFM, SEM and CLSM. The PVDF membrane surface was more rough and hydrophilic, and possessed a better microbial affinity compared to PP. Furthermore, the MABR equipped with a PVDF membrane removed more COD (97.06 ± 0.97%) and TN (85.66 ± 0.87%) compared to the MABR with PP membrane (87.13 ± 0.87% and 71.13 ± 0.71%, respectively). As well, the PP membrane exhibited severe membrane pore blocking and had a lower oxygen transfer rate than the PVDF membrane. It is concluded that the PVDF membrane has potential as an aeration membrane material for MABRs. [Display omitted] •CLSM was used to investigate the suitable membrane for MABR.•PVDF was better than PP in terms of organic and nitrogen removals.•PP membrane exhibited more serious membrane pore blocking.•PP has a lower oxygen transfer rate than PVDF.•PVDF possessed a better microbial affinity than PP.
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2018.12.121