一体式MFC-好氧MBR运行效果及膜污染特性  

Performance and membrane fouling characteristics in a membrane bioreactor coupled with microbial fuel cell system

作　　者：迪世靖 左薇[1] 王德震[1] 田禹[1,2] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,哈尔滨150090 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090

出　　处：《环境工程学报》2014年第4期1367-1372,共6页Chinese Journal of Environmental Engineering

基　　金：国家"水体污染控制与治理"科技重大专项(2013-ZX07201007);城市水资源与水环境国家重点实验室项目(2014DX03);高等学校博士学科点专项科研基金资助项目(20112302110060);国家创新研究群体科学基金资助项目(51121062)

摘　　要：膜生物反应器(MBR)是一种高效的污水处理工艺,而微生物燃料电池(MFC)能利用NO-3作为电子受体进行脱氮。为解决膜生物反应器(MBR)脱氮效率低和膜污染问题,建立了一套能够进行脱氮、有效抑制膜污染的一体式MFC-好氧MBR新工艺。以开路MFC-MBR反应器为对照,对耦合系统中污水处理效果、膜污染情况进行研究。研究表明,2套系统的COD去除率均超过88%,对NH4-N的去除均达到99%。闭路MFC-MBR系统TN去除率达到69.4%,高于开路系统的55.3%。混合液的MLVSS/MLSS稳定在88%左右,同时耦合系统能够改善污泥混合液的性质,zeta电位的绝对值和粘度较开路系统有所减少,污泥颗粒平均体积粒径(233.482μm)较开路系统(94.877μm)有明显增加,膜清洗周期延长了41.17%。Membrane bioreactor （MBR） is an effective process for wastewater treatment,and the microbial fuel cell （MFC） can use nitrate as electron acceptor to remove nitrogen. In this study,a MBR coupled with MFC （MFC-MBR） was established to simultaneously remove nitrogen and mitigate membrane fouling. The perform- ances of wastewater treatment systems,the membrane fouling and the characteristics of mixedliquor were investi- gated in both the control-MBR,and MFC-MBR. The results showed that the two systems had the similar removal efficiencies of COD （88%） and NH4-N （99%）. The total nitrogen removal efficiency in the MFC-MBR （69.4%） was higher in comparison with that in the control-MBR （55.3%）. The ratios of mixed liquor volatile suspended solids （MLVSS） to mixed liquor suspended solids （MLSS） for the two systems were almost identical, and both maintained at 88%. The MFC-MBR system could modify thecharacteristic of mixed liquor,leading to a lower viscosity, higher zeta potential and larger size of microbial flocs. Moreover, the chemical cleaning cycle peri- od was prolonged by 41.17%.

关 键 词：膜生物反应器 微生物燃料电池 脱氮 膜污染 

分 类 号：X703.1[环境科学与工程—环境工程]