Effects of structural vulnerability of flat-sheet membranes on fouling development in continuous submerged membrane bioreactors.
Effects of structural vulnerability of flat-sheet membranes on fouling development in continuous submerged membrane bioreactors.
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DOI：
10.1016/j.biortech.2020.123015
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发表时间：
2020-02
影响因子：
11.4
通讯作者：
T. Sano;Yoshiki Koga;Hiroaki Ito;L. Duc;T. Hama;Y. Kawagoshi
中科院分区：
文献类型：
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作者：
T. Sano;Yoshiki Koga;Hiroaki Ito;L. Duc;T. Hama;Y. Kawagoshi
采用四种材料(聚偏二氟乙烯(PVDF)、聚醚砜、氯化聚氯乙烯和聚四氟乙烯)制备的平板膜，研究了实验室连续膜反应器(MBR/Lab)中膜污染发展与膜材料的关系。并将MBR/Lab中的悬浮液与实际污水处理厂的悬浮液进行了比较。研究发现，除了膜材料本身的特性外，膜的结构易损性对膜的污染发展也有决定性的影响。在MBR运行过程中，PVDF膜表现出最高的跨膜压力，由于曝气产生的剪切力，其表面受到了严重的破坏，从而导致污染物质对膜的渗透。MBR/Lab中悬浮液的特性与粪便处理厂的MBR和污水处理厂曝气池中的悬浮液基本相同。
The relationship between fouling development in a continuous laboratory-scale membrane reactor (MBR/Lab) and the membrane material was investigated using flat-sheet membranes prepared from four materials (polyvinylidene difluoride (PVDF), polyethersulfone, chlorinated polyvinyl chloride, and polytetrafluoroethylene). Further, the characteristics of the suspension liquid in MBR/Lab were compared with those of samples from actual wastewater treatment plants. It was found that, in addition to the membrane material’s own characteristics, the structural vulnerability of the membranes had a determining effect on fouling development. The PVDF membrane showed the highest transmembrane pressure during MBR operation and its surface experienced significant damage because of the shearing stress caused by aeration, resulting in the penetration of the membrane by the fouling compounds. The characteristics of suspension liquid in MBR/Lab were almost similar to those in the MBR at a night-soil treatment plant and the aeration tank of a sewage treatment plant.