电极/生物膜反应器全程自养脱氮的快速启动  

Rapid Start-up of a Completely Autotrophic Nitrogen Removal Process in a Three-dimensional Biofilm-electrode Reactor

作　　者：唐金晶[1,2] 郭劲松[1] 方芳[1] 雷礼婧[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]重庆大学化学化工学院,重庆400044

出　　处：《中国给水排水》2013年第21期19-23,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(50608071);教育部重大项目(308020);中央高校基本科研业务费资助项目(CQDXWL-2012-040)

摘　　要：以含NH+4-N的模拟废水为进水,利用稳定运行的反应器,研究新构建的三维电极/生物膜反应器全程自养脱氮的快速启动方法。在进水NH+4-N为35 mg/L、pH值=7.8、HRT=24 h的条件下,通过调节加载在反应器上的电流实现对反应器中阴极区DO浓度和pH值的调节,成功实现了全程自养脱氮。经过30 d的挂膜期和60 d的电流驯化稳定期,氨氮转化率可达91%,对总氮的去除率为85%。与挂膜期、污泥驯化期和稳定期3阶段启动法相比,采用挂膜期、稳定期的2阶段启动法所需的启动时间缩短。在快速启动的反应器中微生物主要以菌胶团形式生长,且菌胶团间有大量的粘液,微生物门类组成丰富,微生物群落结构组成呈现多样化,优势菌门为变形菌门,优势菌纲为β-变形菌纲。Rapid start-up of a completely autotrophic nitrogen removal process was investigated in a three-dimensional biofilm-electrode reactor for treating synthetic wastewater containing ammonia nitro- gen. The completely autotrophic nitrogen removal process was started up successfully by adjusting current load on the reactor to change dissolved oxygen and pH in cathode chamber when the influent NH^＋_4-N, pH and HRT were 35 mg/L, 7.8 and 24 h respectively. The removal rates of NH^＋_4-N and TN were 91% and 85% respectively after 30 d of biofilm formation and 60 d of adaptation. The time required to start-up in two steps of biofilm formation and adaptation was shorter than the time required to start-up in three steps of biofilm formation, sludge domestication and adaptation. Microorganisms grew in form of zoogloea with a great amount of slime, the microbial species were abundant, and the microbial community structures were diversified. The predominant phylum is Proteobacteria, and the predominant class was β- Proteobacteria.

关 键 词：全程自养脱氮 三维电极 生物电化学 氢自养 启动 

分 类 号：X703[环境科学与工程—环境工程]