电刺激强度对厌氧膜生物反应器产甲烷与膜污染的影响  

Impact of electrical stimulation intensity on methane production and fouling in anaerobic membrane bioreactors

作　　者：黄志超 赵珂 康瑞鹏 苏小莉 张梦蝶 宋姿 孙飞云 HUANG Zhichao;ZHAO ke;KANG Ruipeng;SU Xiaoli;ZHANG Mengdie;SONG Zi;SUN Feiyun(Harbin Institute of Technology(Shenzhen),Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control,Shenzhen 518055,China;Southwest Municipal Engineering Design&Research Institute,Chengdu 610000,China)

机构地区：[1]哈尔滨工业大学(深圳),深圳市水资源利用与环境污染控制重点实验室,深圳518055 [2]中国市政工程西南设计研究总院有限公司,成都610213

出　　处：《环境工程学报》2024年第5期1256-1264,共9页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(52070053,42277376);城市水资源与水环境国家重点实验室(哈尔滨工业大学)自主课题(2023TS20)。

摘　　要：针对厌氧膜生物反应器(AnMBR)实现污水资源回收过程中存在的膜污染问题,研究了不同电刺激强度对AnMBR产甲烷效能及膜污染的影响。结果表明:适宜电刺激强度(1.0 V·cm^(−1))可实现较好的COD除效果,COD的平均去除率为(85.9±5.9)%。相比于AnMBR,当电刺激强度在0.5~2.0 V·cm^(−1),EAnMBR的膜污染周期延长了13.8%~24.0%,甲烷产率提高了15.9%~43.8%,EPS质量浓度减少了3.5%~27.1%,SMP质量浓度减少了24.3%~52.0%。施加电刺激促进了以乙酸主导的挥发性脂肪酸的降解,氢营养型产甲烷菌Methanobrevibacter比乙酸型产甲烷菌更适应电刺激环境,而EPS产生菌Streptococcus的相对丰度随电刺激强度的增加而减少。基于甲烷资源化-延长膜污染周期的协同效果,施加2.0 V·cm^(−1)的电刺激强度较为理想,以上研究结果可为AnMBR耦合电辅助工艺提供参考。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.

关 键 词：厌氧膜生物反应器 电刺激强度 甲烷产率 膜污染缓解 

分 类 号：X703[环境科学与工程—环境工程]