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.
出处
《中国给水排水》
CAS
CSCD
北大核心
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)
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
submerged membrane bioreactor
pilot-scale test
municipal wastewater
nitrogen and phosphorus removal
dissolved oxygen
airlift internal-loop reactor
