低温下A^2/O工艺污泥膨胀的微生物群落结构变化  

Microbial Community Structure Change in an A^2/O Activated Sludge Bulking at Low Temperature

作　　者：王秀朵[1,2] 秦莉[3] 潘留明[1,2] 赵乐军[1,2] 陈赓妮 冯志桐 端正花[4,5] 

机构地区：[1]天津市市政工程设计研究院,天津300051 [2]天津市基础设施耐久性企业重点实验室,天津300051 [3]农业部环境保护科研监测所,天津300191 [4]天津理工大学环境科学与安全工程学院,天津300384 [5]天津大学环境科学与工程学院,天津300072

出　　处：《中国给水排水》2017年第13期104-107,112,共5页China Water & Wastewater

基　　金：公益性行业(农业)科研专项(201403014);中国农业科学院创新工程项目(2015-cxgc-lyj)

摘　　要：采用高通量测序技术研究了A^2/O工艺低温运行下污泥膨胀的机理及调控措施。结果表明,在21℃—19℃—12℃的降温过程中,活性污泥的SVI值显著升高、COD去除率相应降低,曝气池污泥中微生物群落结构也发生了显著改变。低温下,酸杆菌取代了不耐低温细菌的优势地位,丝状菌α变形菌纲和类丝状菌Candidate division TM7大量繁殖,微生物群落结构变化是引发该反应器发生低温污泥膨胀的根本原因。低温对A2/O反应器中活性污泥性能的影响是可逆的,在采取合适的调控措施后,污泥性能可恢复到较好的水平。The mechanisms and control measures of activated sludge bulking in an anaerobic - anoxic -oxic（A^2/O） reactor at low temperature were studied, using the water quality parameter detecting and the high throughput sequencing technology. Results showed that, in the 21 ℃ - 19 ℃ - 12 ℃ cool- ing process, the sludge volume index （SVI） value was significantly increased and the COD removal rate was decreased correspondingly, and the microbial community structure in the aeration tank was signifi cantly changed as well. The dominant position of bacteria that lack of resistance to low temperatures was replaced by Acidobacteria; meanwhile, Alphaproteobacteria and Candidate division TM7 had also propa- gated significantly. Therefore, the activated sludge bulking in this reactor was changes in the microbial community structure at low temperatures. The effect of mainly attributed to the low temperature on the activity of A^2/O reactor was reversible. The sludge could recover to a good degradation effect after some controlling measures were implemented.

关 键 词：A^2/O工艺 污泥膨胀 低温 微生物群落 丝状菌 

分 类 号：X172[环境科学与工程—环境科学] X703