To mitigate membrane fouling in anaerobic membrane bioreactors(AnMBR)during sewage resource recovery,this study investigated the impact of various electrical stimulation intensities on methane production efficiency and membrane fouling.The results reveal that a suitable intensity of electrical stimulation(1.0 V·cm-1)could lead to high COD removal with an average removal rate of(85.9±5.9)％.In comparison with AnMBR,electrical stimulation intensities of 0 to 2.0 V·cm-1 in EAnMBR could extend the membrane fouling cycle by 13.8％～24.0％,increase methane production by 15.9％～43.8％,decrease EPS content by 3.5％～27.1％,and decrease SMP content by 24.3％～52.0％.The application of electrical stimulation promoted the degradation of acetate-dominant volatile fatty acids.Hydrogenotrophic methanogens,Methanobrevibacter,presented a greater adaptability to the electrical stimulation environment than acetate-utilizing methanogens.Conversely,the relative abundance of extracellular polymeric substances-producing Streptococcus decreased with the increase of electrical stimulation intensity.Based on the synergistic effects of methane resource recovery and the extension of membrane fouling cycles,2.0 V·cm-1 was considered as a favorable intensity of electrical stimulation.The results can provide valuable insights for AnMBR coupled with electro-assistive processes.
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