常温CSTR半亚硝化启动与稳定运行试验研究  

Start-up and Stable Operation of Partial Nitrification in CSTR at Normal Temperature

作　　者：吴迪[1] 李冬[1] 仲航[1] 蔡言安[1] 王斌[1] 曾辉平[1] 张杰[1,2] 

机构地区：[1]北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京100124 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090

出　　处：《中国给水排水》2013年第15期5-9,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(50878003);新世纪优秀人才支持计划项目(NCET-10-0008);国家水体污染控制与治理科技重大专项(2012ZX07202-005)

摘　　要：分别采用人工配水及生活污水经A／O工艺处理后的二级出水，研究了常温CSTR半亚硝化反应器的启动及稳定运行，分析了连续流、低氨氮浓度启动失败的原因。通过提高进水氨氮浓度并转变为SBR方式运行，曝气时间为8h，控制DO在O．2～0．3mg／L，仅经过17d（34个周期）亚硝化率即达到90％以上，成功启动了亚硝化反应器。在常温、连续流条件下运行，通过HRT与DO的联合控制，可为厌氧氨氧化反应提供适宜比例的进水，亚硝态氮／氨氮平均值为1．18。FA是亚硝化启动的重要因素，但不是启动成功后维系亚硝化稳定的必要条件。在试验过程中针对不同的运行阶段，采用扫描电镜（SEM）对系统中微生物进行了分析，结果表明，随运行时间的延长，污泥形态逐渐向短杆状转变。The start-up and stable operation of partial nitrification in a CSTR using synthetic wastewater and A/O effluent at normal temperature were studied. The reasons why the CSTR could not start up under low ammonia nitrogen concentration were analyzed. By increasing the ammonia nitrogen concentration and changing the operation mode into SBR, more than 90% nitrite accumulation rate could be achieved after 17 d （34 cycles） when the aeration time was 8 h and DO concentration was at 0.2 to 0.3 rag/L, achieving a successful start-up. Under continuous flow and normal temperature, NOr - N/ NH4 -N ratio reached 1.18 by regulating HRT and DO, and the effluent can be used for the ANAM- MOX reactor. FA was a main factor during the start-up period, but not the indispensable factor during stable operation after a successful start-up. SEM was used to qualitatively analyze the microorganisms. In the results, the sludge morphology showed a shift towards small rod-shaped clusters.

关 键 词：恒流搅拌反应器 亚硝化 生活污水 常温 扫描电镜 

分 类 号：X703[环境科学与工程—环境工程]