低温条件下低溶解氧污泥微膨胀的发生及分子生态学解析  

Initiation and Molecule Ecology Analysis of Low Dissolved Oxygen Limited Filamentous Bulking at Low Temperature

作　　者：高春娣[1] 武联菊[1] 郝坤[1] 李磊[1] 袁金萍[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124

出　　处：《北京工业大学学报》2011年第7期1085-1089,共5页Journal of Beijing University of Technology

基　　金：北京市教委计划项目(KM200910005003);北京市优秀人才培养资助项目(PYZZ090429002183)

摘　　要：采用SBR工艺处理实际生活污水，在低温条件下，通过降低溶解氧诱使活性污泥发生微膨胀，使污泥容积指数（SVI）维持在150～200mL／g．研究了低温条件下活性污泥微膨胀的发生及活性污泥中微生物的生长，通过FISH技术对微膨胀状态下的优势丝状菌进行定性分析，确定低温下诱发低氧微膨胀的丝状菌是微丝菌（MPA223）．与正常溶解氧时相比，微膨胀状态下COD和PO4^3- -P^-的去除率均上升，分别为80％和98％；NH4^- -N和TN的去除率有所下降，分别为52％和28％；研究中还发现，低溶解氧导致了同步硝化反硝化（SND）现象的发生，约有15％的氮通过SND现象去除．Actual domestic sewage was treated by SBR process. Limited filamentous bulking was induced by low dissolved oxygen at low temperature, and the SVI were maintained 150 -200 mL/g. The occurrence of limited filamentous bulking at low temperature and the growth of microorganism were researched ; the technique of FISH was adopted to identify the species of the dominant filamentous bacteria in the state of limited filamentous bulking, and the result showed that the filamentous bacteria that led to limited filamentous bulking was microthrix parvicella （MPA223）. Compared to the status at normal dissolved oxygen, the removal rate of COD and PO4^3- -P increased to 80% and 90% , while the removal rate of NHf-N and TN decreased to 52% and 28% respectively during limited filamentous bulking. And the data also showed that low dissolved oxygen led to the phenomenon of simultaneous nitration-denitration（SND） , about 15% of the nitrogen was removed by SND.

关 键 词：低溶解氧 污泥微膨胀 低温 微丝菌 

分 类 号：X703.1[环境科学与工程—环境工程]