膜科学与技术

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Impact of solid-phase media addition on membrane fouling
and microbial community in MBR systems

Authors： WU Wei, LI Ming, ZHANG Pengfei, GAO Fei, WU Wei

Units： 1. Hefei Water Environment Construction Investment Co., Ltd., Hefei 230000, China; 2. School of Environmental Science and Engineering, Tiangong University, Tianjin 300387, China; 3. Shanghai Municipal Engineering Design Institute (Group) Co., Ltd., Shanghai 200092, China

KeyWords： words: membrane bioreactor (MBR); membrane fouling; solid-phase medium; microbial community; shear force

ClassificationCode：TQ028; X703

year,volume(issue):pagination： 2025,45(5):153-161

Abstract：

Membrane bioreactor (MBR) is widely used in wastewater treatment, but membrane fouling restricts their long-term stable operation. This study innovatively introduced fiber Bragg grating (FBG) technology into the MBR flow field, and systematically explored the action mechanisms of three media, namely activated carbon, PVA sponge and silica, on the flow field characteristics and community succession of the reactor. The results showed that increasing aeration intensity significantly enhanced the flow field shear force on the surface of the three media. Among them, the PVA sponge, due to its three-dimensional network structure, led to the most significant increase in flux, followed by activated carbon particles and silica. The PVA sponge provided suitable attachment sites for microorganisms, which could significantly improve intracellular enzyme activity, while activated carbon particles and silica had limited effects on enhancing enzyme activity. Activated carbon accelerated the proliferation of pollution-degrading microbial communities; the PVA sponge drove the film formation of microorganisms to reduce the deposition of biological products; silica controlled pollution relying on shear force and had a weak impact on the community structure. This study provides a theoretical basis for optimizing MBR membrane fouling control strategies.

Funds：

上海市“科技行动计划”国际合作课题资助项目（22230730300）

AuthorIntro：

吴伟（1985-），男，湖北天门人，工程师，研究方向为污水处理与资源化

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