O_(2)还原生物阴极电催化反应器电压调控启动及除酚  

Voltage Regulation Strategy for Startup of O_(2)-reducing Biocathode Electrocatalytic Reactor and Its Phenol Removal Behavior

作　　者：孙丽萍[1,2] 莫颖慧 原婷婷[2,3] 姜涛 SUN Li-ping;MO Ying-hui;YUAN Ting-ting;JIANG Tao(School of Environmental Science and Engineering,Tiangong University,Tianjin 300387,China;State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin 300387,China;School of Material Science and Engineering,Tiangong University,Tianjin 300387,China;Beijing Lianhe Zongheng Management Consulting Co.Ltd.,Beijing 100101,China;Tianjin Jingang Petrochemical Co.Ltd.,Tianjin 300191,China)

机构地区：[1]天津工业大学环境科学与工程学院,天津300387 [2]天津工业大学分离膜与膜过程国家重点实验室,天津300387 [3]天津工业大学材料科学与工程学院,天津300387 [4]北京联合纵横管理咨询有限公司,北京100101 [5]天津津港石化有限公司,天津300191

出　　处：《中国给水排水》2023年第3期32-39,共8页China Water & Wastewater

基　　金：天津市教委科研计划项目(2018KJ199)。

摘　　要：利用电压调控手段实现O_(2)还原生物阴极和MnO_(x)/Ti多孔阳极的耦合,以构建O_(2)还原生物阴极电催化反应器(BECR),并用于去除苯酚,探讨了电压对反应器启动、阴极微生物群落结构及去除苯酚的影响。电流密度及阴极电势的变化结果表明,在0.7、1、1.3 V电压下BECR均可成功启动;在0.7和1 V电压下BECR的启动周期约为30 d,比1.3 V电压下的启动周期(约60 d)要短;启动成功后BECR阴极可发生O_(2)还原为H_(2)O的反应。对启动成功的BECR阴极微生物群落结构进行分析,发现变形菌门是阴极的优势菌门。当启动电压为0.7 V时,假单胞菌属及短波单胞菌属是实现O_(2)还原反应的主要菌属;当启动电压为1 V时,寡养单胞菌属是实现O_(2)还原反应的主要菌属。相较于1 V电压,在0.7 V电压下启动的BECR阴极具有更高的O_(2)还原菌属丰度。当苯酚进水浓度为2mmol/L时,在0.7和1 V电压下启动的BECR的TOC去除率分别为(49.99±0.36)%和(42.10±0.28)%,能耗分别为1.67和9.55 kW·h/kgTOC,前者具有更高的TOC去除率和更低的能耗。The voltage regulation strategy was used to realize the coupling of O_(2)-reducing biocathode and MnO_(x)/Ti porous anode to construct an O_(2)-reducing biocathode electrocatalytic reactor(BECR)for phenol removal.The effects of voltage on reactor startup,microbial community composition of the cathode and phenol removal were investigated.The variations of current density and cathode potential showed that the BECR could be successfully started at voltages of 0.7 V,1 V and 1.3 V.The startup period of BECR at voltages of 0.7 V and 1 V was approximately 30 days,which was shorter than that of BECR at 1.3 V(approximately 60 days).The reduction of O_(2)to H_(2)O occurred on the cathode after the startup of BECR.The microbial community composition on the cathode of BECR was analyzed,and Proteobacteria was found to be the dominant bacteria phylum on the cathode.Pseudomonas and Brevibacterium were the main bacterial genera to realize O_(2)reduction reaction when the starting voltage was 0.7 V,while Stenotrophomonas was the main bacterial genus to achieve O_(2)reduction when the starting voltage was 1 V.Compared with the cathode of BECR started at voltage of 1 V,that of BECR started at voltage of 0.7 V had a higher abundance of O_(2)-reducing bacteria.When the influent concentration of phenol was 2 mmol/L,the TOC removal rates of BECR was(49.99±0.36)%and(42.10±0.28)%at voltages of 0.7 V and 1 V,and the energy consumption was 1.67 kW·h/kgTOC and 9.55 kW·h/kgTOC,respectively.Therefore,the BECR started at voltage of 0.7 V had a higher TOC removal rate and lower energy consumption than that started at voltage of 1 V.

关 键 词：O_(2)还原生物阴极 电催化 电压调控启动 去除苯酚 能耗 

分 类 号：TU992[建筑科学—市政工程]