摘要
Abstract
The experiment adopted the Anaerobic-Anoxic-Oxic-Membrane Bio-Reactor(A2O-MBR)coupled process to treat urban sewage,focusing on enhancing the efficiency of deep nitrogen and phosphorus removal.The system investigated the effects of sludge return ratio,Dissolved Oxygen(DO)concentration,and Hydraulic Retention Time(HRT)on the treatment outcome.The results showed that when the sludge return ratio was 200%,the Total Nitrogen(TN)removal rate was the highest,while the Total Phosphorus(TP)removal rate peaked at 150%;when the DO mass concentration was 2.5 mg/L,it is possible to achieve both good treatment effect and low energy consumption;after extending the HRT to 16 h,the TN and TP removal rates reached 89.5%and 93.8%respectively,further prolonging HRT would have limited effect on increasing the removal rates of TN and TP,verifying the technical feasibility and superiority of this coupled process in the deep treatment of urban sewage.关键词
厌氧-缺氧-好氧-膜生物反应器(A2O-MBR)/城镇污水/水质净化Key words
Anaerobic-Anoxic-Oxic-Membrane Bio-Reactor(A2O-MBR)/urban sewage/water quality purification分类
资源环境
