TIANJia-yu,GUOZhi-jie,HUANGRui,et al.Effect of Aggregate Size on Membrane Fouling of Hollow Flat Ceramic Membrane in MBR[J].China Water & Wastewater,2024,40(9):8-13.
Effect of Aggregate Size on Membrane Fouling of Hollow Flat Ceramic Membrane in MBR
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第9期
Page:
8-13
Column:
Date of publication:
2024-05-01
- Abstract:
- Polymeric microfiltration membrane has a serious problem of membrane fouling in MBR. Hollow flat ceramic membrane combines the advantages of ceramic material and flat configuration, and shows a strong application prospect in MBR. In order to investigate the effect of aggregate size on the fouling characteristics of hollow flat ceramic membrane in MBR, a series of membranes using corundum powder with different particle size（1-10 μm） as aggregate were prepared. The results showed that the pore size, permeability and surface roughness of the membrane increased with the increase of aggregate size, but the effluent quality of MBR was not affected in a large pore size range（0.11-1.30 μm）. During the operation of MBR, the transmembrane pressure growth rate of ceramic membrane prepared by 5 μm corundum was the lowest, and the membrane fouling resistance in the pore was the lowest, showing excellent anti-fouling performance. The analysis results of membrane surface foulants showed that the concentration of polysaccharides and proteins accumulated in the operation was the lowest, and the thickness of the fouled layer was the smallest and loose, which might be related to the improvement of microbial population structure in the fouled layer. This study proves that optimizing the aggregate size of hollow flat ceramic membrane is an effective method to improve the anti?fouling performance of MBR.
Last Update:
2024-05-01