SCAR处理城市生活污水的效能及其微生物群落动态分析  

Analysis on Performance and Microbial Community Dynamics of a Strengthen Circulation Anaerobic Reactor Treating Municipal Wastewater

作　　者：杨波[1,2] 徐辉[1,2] 冯修平 李方[1,2] 田晴[1,2] 马春燕[1,2] 

机构地区：[1]国家环境保护纺织工业污染防治工程技术中心,上海201620 [2]东华大学环境科学与工程学院,上海201620

出　　处：《环境科学》2017年第5期2021-2029,共9页Environmental Science

基　　金：上海市自然科学基金项目(13ZR1401000)

摘　　要：利用强化循环厌氧反应器(SCAR)处理模拟城市生活污水,研究不同负荷条件下的反应器运行特征、污泥特性及微生物种群结构.结果表明,水力停留时间(HRT)为6 h可以作为反应器高效运行的关键控制参数,该条件下污水化学需氧量(COD)去除率达到75%以上.随着反应器容积负荷的逐渐提高,颗粒污泥中辅酶F420和产甲烷活性(SMA)逐渐增加,胞外聚合物(EPS)含量也不断提高,其中紧密黏附EPS(TB-EPS)含量的增加尤其明显.厌氧颗粒污泥性状和反应器对污染物的去除效率同时受到污泥负荷和HRT的影响,微生物的群落结构及其在反应器中的空间分布也受到污泥负荷的影响,不同代谢特征微生物在反应器不同空间位置的相对丰度随着污泥负荷的调整而改变.A strengthen circulation anaerobic reactor（SCAR） treating artificial municipal wastewater was investigated under different volumetric loading rate（VLR） and the reactor performance,characteristics of granular sludge and microbial community structure were also tested in this experiment. The results of the experiment demonstrated that the hydraulic retention time（HRT） of 6h could be regarded as the key parameter dominating the efficient operation of SCAR reactor,in which condition the COD removal efficiency was above 75%. The coenzyme F420 and the maximum specific methanogenic activity（SMA） of granular sludge increased with increasing VLR,and the EPS contents,especially TB-EPS in the granule sludge also increased obviously. Consistently,the characteristics of anaerobic granular sludge and the removal efficiency of the reactor were influenced by both sludge loading and HRT. The microbial community structure and its spatial distribution in the reactor were also affected by sludge loading,while the relative abundance of the microbial community with different metabolic characteristics in different spatial positions changed with the adjustment of the sludge loading.

关 键 词：强化循环厌氧反应器(SCAR) 城市生活污水 粒径分布 污泥活性 胞外聚合物 微生物群落 

分 类 号：X172[环境科学与工程—环境科学] X703.1