Impact of influent COD and ammonia mass concentration on alternating oxic-anoxic shortcut nitrification-denitrification

The effects of influent COD and ammonia nitrogen mass concentration on alteroating oxic-anoxic shortcut nitrification-denitrification were studied specially in some experiments carried on a sequencing batch reactor(SBR).The(following) results show that: Real-time control parameters and removal efficiency were not(influenced) by different influent COD and ammonia nitrogen mass concentration in biological nitrogen removal process via(alternating) oxic-anoxic shortcut nitrification-denitrification,and the operation of whole system was stable.However,aeration time was changeable with various COD and ammonia nitrogen mass concentration in influent.More time duration for the nitrification was needed,if ammonia nitrogen mass concentration in influent was much high.Nitrification and denitrification were whole finished because of using real-time control strategies,and ammonia and nitrite were not detected in effluent of SBR.Therefore,it shows that there is strong ability resisting the change of influent COD and ammonia in alternating oxic-anoxic shortcut nitrification-denitrification process,and the system is stable when using real-time control strategies controls the process for nitrogen removal.