活性炭-聚四氟乙烯电极对生物电化学系统中NH_4^+-N去除的影响  

Effects of activated carbon-polytetrafluoroethylene electrodes on NH4+-N removal in bioelectrochemical system

作　　者：王睿[1] 张冬冬[1] 郭鹏[3] 王轶[3] 章春芳[1] 陈磊[1,2] WANG Rui;ZHANG Dong-dong;GUO Peng;WANG Yi;ZHANG Chun-fang;CHEN Lei(Ocean College,Zhejiang University,Zhoushan 316021,Zhejiang,China;Ocean Research Center of Zhoushan,Zhejiang University,Zhoushan 316021,Zhejiang,China;Institute of Agro-Products Processing and Nuclear-Agricultural Technology,Hubei Academy of Agricultural Sciences,Wuhan 430064,China)

机构地区：[1]浙江大学海洋学院,浙江舟山316021 [2]浙江大学舟山海洋研究中心,浙江舟山316021 [3]湖北省农业科学院农产品加工与核农技术研究所,武汉430064

出　　处：《湖北农业科学》2020年第21期81-87,共7页Hubei Agricultural Sciences

基　　金：浙江省重点研发计划项目(2018C02033);舟山市科技计划项目(2018C81039)。

摘　　要：通过压力机将炭黑和聚四氟乙烯压缩,自制活性炭-聚四氟乙烯电极并置于单室生物电化学系统(BES)中,实现无外加有机碳源的自养型脱NH_4^+-N。结果表明,通过给BES外加电压可以提升NH_4^+-N的去除效果,并且随着外加电压从0.10 V提升至0.25 V,NH_4^+-N的去除效果逐渐上升,平均去除率为47.8 mg/(L·d)。生物膜循环伏安(CV)分析结果显示,在电极的阳极和阴极存在多种氧化还原活性成分,说明用活性炭制成的生物阳极和生物阴极具有良好的电活性。基于高通量测序的16S rRNA基因的微生物群落分析表明,通电后微生物群落多样性明显增加,假单胞菌属(Pseudomonas)和副球菌属(Paracoccus)是BES中去除含氮化合物的重要功能菌群。Carbon black and polytetrafluoroethylene(PTFE)were flat-pressed to fabricate the activated carbon(AC)-polytetrafluoro⁃ethylene electrodes.These AC-based electrodes were applied in a single-chamber BES to achieve autotrophic NH4+-N removal under organic carbon-free conditions.The results showed that NH4+-N removal effect could be enhanced by applying voltage to the BES,in which case the NH4+-N removal efficiency gradually increased as the applied voltage increased from 0.10 V to 0.25 V.The average NH4+-N removal rate in a BES was 47.8 mg(/L·d).Cyclic voltammetry results revealed the presence of several redox-active compo⁃nents on the anode and cathode surfaces,indicating that the AC-based bioanode and biocathode had good electroactivities.Microbial community analysis of 16S rRNA genes based on high-through put sequencing indicated that the diversity of the microbial community increased after electric power application,and Pseudomonas and Paracoccus could be important for nitrogen-compound removal in the BES.

关 键 词：活性炭 生物电化学系统(BES) 生物膜 NH_4^+-N去除 

分 类 号：X52[环境科学与工程—环境工程]