SMBR处理城市污水的同步脱氮除磷研究  

Pilot Study on Simultaneous Nitrogen and Phosphorus Removal in Submerged Membrane Bioreactor Treating Municipal Wastewater

作　　者：杨利[1] 魏春海[1] 黄霞[1] 王宝泉[2] 

机构地区：[1]清华大学环境模拟与污染控制国家重点联合实验室,北京100084 [2]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《中国给水排水》2006年第11期13-17,共5页China Water & Wastewater

基　　金：国家高技术研究发展计划(863)项目(2005AA601030)

摘　　要：通过对一体式膜生物反应器(SMBR)中试系统操作条件的调控,探讨了该装置在处理典型城市污水时的同步脱氮除磷功能。由于反应器具有不同的溶解氧分区,导致菌胶团内部同时存在好氧、缺氧、厌氧的微环境,使系统具有一定的同步脱氮除磷功能。试验结果表明,在曝气量为14.5m3/h、水力停留时间为4.5h、污泥浓度为8.0g/L时,出水COD、NH4+-N符合《城市污水再生利用城市杂用水水质》(GB/T18920—2002),对总氮的平均去除率为45.6%,对总磷的平均去除率为43.1%。同时发现由过高的污泥浓度造成的溶解氧不足,是导致SMBR对氨氮去除效果不佳的主要因素。The potential of simultaneous nitrogen and phosphorus removals in a SMBR treating typical municipal wastewater was investigated by adjusting its operational parameters. Due to the structural characteristics of the bioreactor, there are zones with different dissolved oxygen concentrations. Thus aerobic/anoxic/anaerobic micro-environment in sludge flocs appears at the same time, resulting in the occurrence of simultaneous nitrogen and phosphorus removals. The results show that COD and NH4^＋ - N in the effluent satisfy the Reuse of Urban Recycling Water-Water Quality Standard for Urban Miscellaneous Water Consumption （GB/T 18920 -2002） when aeration rate is 14.5 m^3/h, HRT is 4.5 h and MLSS is 8.0 g/L. At the same time, the removal rates of TN and TP are 45.6% and 43.1% respectively. Additionally, it has been found that the lack of dissolved oxygen caused by high MLSS is the main factor for the low removal rate of NH4^＋ - N.

关 键 词：一体式膜生物反应器 中试 城市污水 脱氮除磷 溶解氧 气升式内循环反应器 

分 类 号：X703.1[环境科学与工程—环境工程]