In step-feed A/O biological nitrogen removal system,the optimal influent flow rate distribution can make full use of the carbon source in influent,and the appropriate anoxic/oxic volume ratio can save the operation cost and resist the influent disturbance effectively.

Removing nitrogen from alcohol wastewater by anoxic/aerobic SBR process;

The sequencing batch reactor(SBR) operated in aerobic/anoxic process with mean DO value of 0.