Application of Improved Multistage AO-MBR Process in High Discharge Standard Domestic Sewage
In view of the requirements of the high discharge standard of rural domestic sewage in Beijing,the improved multistage AO-MBR process was selected,the multi-stage anoxic uniform water distribution was adopted to rationally allocate carbon sources,and the low dissolved oxygen condition of the aerobic pool with the mass concentration of dissolved oxygen of 0.5～1 mg/L was controlled.An oxygen deoxidizing tank was added at the front end of the process,and the 300%mixed liquid of the MBR pool was returned to the first deoxidizing tank.The actual operation effect of the improved technology in treating rural domestic sewage was investigated.The results show that the removal efficiencies of COD,NH3-N,TN,TP and SS by the improved process are 94.1%,97.8%,90.0%,96.4%and 98.7%,respectively.The improved process has good treatment effect on domestic sewage,high nitrogen removal efficiency and no need to add carbon sources,which provides a new idea for the application design of multistage AO process.
万方数据
维普
