Membrane fouling of actual extracellular polymeric substances

Qiang Li, Ge Hu, Peng Song, Natsagdorj Khaliunaa, Rooha Khurram, Hu Zhang, Xuguo Liu, Zhan Wang, Shujuan Gao, Chao Liu, Xi Wang

Research output: Contribution to journalConference articlepeer-review


Extracellular polymeric substances (EPSs) in activated sludge suspensions are the key substances leading to the membrane fouling. In order to understand the effect of EPSs on the membrane fouling, the actual EPSs solution extracted from activated sludge suspensions was used as the feed solution to conduct dead-end microfiltration experiment under different pressures by using different membranes. The flux (J), fouling resistances (Rm, Rp, Rc and Rtotal) and the available membrane area (A/A0) were used to describe the membrane fouling. The results showed that with the increase of pressure, J and Rtotal increased. Rp firstly increased and then kept constant, Rc always increased and became the dominant resistance. A/A0 decreased from 1 to a constant. Rc plays a key role on Rtotal for different membranes under the same pressure. The sequence of the steady available membrane area (Asteady/A0) for different pressures was: 63.0% (0.05MPa)> 56.5% (0.08MPa)> 53.6% (0.10MPa), and that for different membranes was: 80.1% (0.2μm PES) > 79.9% (0.1μm PES) > 78.4% (0.1μm PAN) > 53.6% (0.1μm PVDF).

Original languageEnglish
Article number012112
JournalIOP Conference Series: Earth and Environmental Science
Issue number1
Publication statusPublished - 26 Jan 2021
Event2020 6th International Conference on Advances in Energy Resources and Environment Engineering, ICAESEE 2020 - Chongqing, China
Duration: 20 Nov 202022 Nov 2020


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