不同曝气方式下亚硝化反应器的启动及N_2O释放  

Start-up and N_2O emission of the nitrosation reactor in different aeration modes

作　　者：巩有奎 李永波[2,3] 彭永臻[2] Gong Youkui;Li Yongbo;Peng Yongzhen(Department of Architecture Engineering,Yantai Vocational College,Yantai 264000,China;Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering,Beijing University of Technology,Beijing 100124,China;Beijing General Municipal Engineering Design & Research Institute Co.,Ltd.,Beijing 100082,China)

机构地区：[1]烟台职业学院建筑工程系,山东烟台264000 [2]北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100124 [3]北京市市政工程设计研究总院有限公司,北京100082

出　　处：《工业水处理》2019年第4期21-24,57,共5页Industrial Water Treatment

基　　金：国家自然科学基金项目(50478040);烟职博士科研2018002号

摘　　要：在常温下〔(20±1)℃〕利用SBR反应器处理低碳氮比实际生活污水,考察连续曝气和间歇曝气方式下亚硝化过程的启动及N_2O的释放。控制SBR反应器DO处于较低水平,并在pH"氨谷"点出现时停止曝气。结果表明,连续曝气和间歇曝气方式分别运行100、75 d后均实现了亚硝化过程。间歇曝气方式下更易实现亚硝化过程。连续曝气和间歇曝气模式下的N_2O转化率分别为12.2%、8.10%。AOB的好氧反硝化过程是N_2O释放的主要途径。间歇曝气模式下的缺氧阶段能够减少好氧段NO_2^-积累,降低好氧反硝化过程底物浓度,减少N_2O释放。At normal temperature(20±1) ℃,SBRs have been used for treating actual domestics wastewater with low C/N ratio,and the start-up and N2O emission of nitrosation process in modes of continuous aeration SBR(SBR1) and intermittent aeration SBR(SBR2) investigated. The DO in SBRs should be controlled at comparatively low level,and the aeration should be stopped at the time of pH ammonia valley point. The results show that both modes could achieve nitrosation process,after continuous and intermittent aeration modes were operated for 100 d and 75 d,respectively. It is easier to realize nitrosation process in intermittent aeration mode. The N2O conversion rates in continuous aeration mode and intermittent aeration mode are 12.2% and 8.10%,respectively. The aerobic denitrification process of AOB is the main path of N2O emission. The anoxic stage in intermittent aeration(SBR2) mode can reduce the NO2- accumulation in aerobic stage,and reduce the substrate concentration in aerobic denitrificaiton process and N2O emission as well.

关 键 词：连续曝气 间歇曝气 亚硝化 N2O 好氧反硝化 

分 类 号：X703[环境科学与工程—环境工程]